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WO2014208642A1 - Pants-type wearable article, and method for producing same - Google Patents

Pants-type wearable article, and method for producing same Download PDF

Info

Publication number
WO2014208642A1
WO2014208642A1 PCT/JP2014/066927 JP2014066927W WO2014208642A1 WO 2014208642 A1 WO2014208642 A1 WO 2014208642A1 JP 2014066927 W JP2014066927 W JP 2014066927W WO 2014208642 A1 WO2014208642 A1 WO 2014208642A1
Authority
WO
WIPO (PCT)
Prior art keywords
exterior body
wearing article
type wearing
pants
side seal
Prior art date
Application number
PCT/JP2014/066927
Other languages
French (fr)
Japanese (ja)
Inventor
伸二 浜本
拓郎 梁島
康至 今井
優輔 浦山
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Publication of WO2014208642A1 publication Critical patent/WO2014208642A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15739—Sealing, e.g. involving cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A61F13/4963—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs characterized by the seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1648—Laser beams characterised by the way of heating the interface radiating the edges of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1696—Laser beams making use of masks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/747—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using other than mechanical means
    • B29C65/7473—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using other than mechanical means using radiation, e.g. laser, for simultaneously welding and severing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B29C66/72941—Non woven mats, e.g. felt coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83435—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts said rollers, cylinders or drums being hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Definitions

  • the present invention relates to a pants-type wearing article having a side seal portion.
  • a conventional pant-type wearing article includes an absorbent main body and an exterior body that forms the outer surface of the wearing article, and both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined together.
  • a pants-type disposable diaper in which a side seal portion is formed is known.
  • Patent Document 1 discloses a three-stage joint to the side seal part from the viewpoint of sufficient joint strength that does not come off while wearing a diaper and improvement in tearability. It is described that the strengths coexist.
  • a heat roll device has been widely used for joining stacked sheets.
  • the side seal portion is heated as described later. It is formed using a roll device.
  • a method of welding using laser light is also known.
  • Patent Document 2 a sheet laminate in which a plurality of sheets are stacked is deformed into a shape along the peripheral surface of a rotary roll having a laser light transmitting portion on the peripheral surface, and the sheet is conveyed. A method of irradiating the laminated body with laser light from the inside of the rotary roll to fuse the sheets in the laminated sheet is described.
  • ⁇ Pants-type disposable diapers are usually manufactured through the following processes. That is, a diaper continuous body in which a plurality of diapers are arranged in one direction (conveying direction) is manufactured, and the front body side exterior body and the back body side of the diaper continuous body are overlapped with each other at a site where the side seal portion is to be formed. After the exterior body is joined by a joining means such as a heat roll device, the joint part is cut by a cutting means such as a cutter, thereby being divided into individual diapers.
  • the side seal part of the conventional pants-type disposable diaper manufactured in this way is formed by overlapping the side edge part of the front body and the side edge part of the back body in the shape of a palm, and the top of the palm-shaped portion is Since it protrudes outward from the diaper than the part, it can be easily recognized visually.
  • the palm-shaped side seal part obtained through the above-described manufacturing process is likely to be relatively hard due to the wide joining width between the exterior bodies and the exterior bodies being strongly pressed during joining. There is room for improvement in terms of wearing feeling and touch of the outer surface. Also, if there is a difference in the number of stacked sheets at the site forming the side seal part, due to the difference, a difference in unintentional bonding strength occurs in the side seal part, for example, the bonding strength on the waist opening side is Since it becomes too high, it becomes difficult to tear the side seal part from the waist opening side after use of the diaper.
  • the present invention includes an exterior body that forms the outer surface of a worn article, and a pair of side seal portions, a waist opening, and both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined together
  • the present invention relates to a pants-type wearing article in which a pair of leg openings are formed.
  • the side seal portion includes a seal edge portion in which the edge portion of the exterior body in the front body and the edge portion of the exterior body in the back body are joined by a continuous linear fusion portion extending in the longitudinal direction of the side seal portion. Formed.
  • the seal edge is formed over a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side is different from each other, and the seal edge Are equal in fusion strength at the plurality of portions.
  • the present invention includes an exterior body that forms the outer surface of the wearing article, and a pair of side seal portions and a waist opening are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body A pair of leg openings, and the side seal portion is a continuous line in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal portion.
  • the method for producing a pants-type wearing article of the present invention includes a polymerization pressurizing step of applying pressure to a portion where a side seal portion is to be formed in a belt-shaped exterior body in a state where the front body side and the back body side are overlapped, By dividing the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body, to the formation planned site of the side seal portion in a pressure state, A side seal portion forming step of forming the seal edge portion by fusing the cut edge portions of the laminated exterior body produced by the division, and further comprising any one of the following (1) to (3) Is provided.
  • the laser beam is applied to a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side are different from each other. The irradiation is performed with different output or scanning speed for each part, and the difference in the fusion strength of the seal edge formed in each part is reduced.
  • the laser beam is applied to a plurality of portions where the total number of stacked sheets of the sheet constituting the front body side exterior body and the rear body side exterior body is different from each other. Irradiation is performed through light passing portions having different widths for each portion, and the difference in the fusion strength of the seal edge portion formed in each portion is reduced.
  • a front body side exterior body is configured by having a projecting portion projecting toward the exterior body side in the vicinity of the light passage portion on the outer surface in contact with the belt-shaped exterior body.
  • a support member having a different protruding height or width of the protruding portion is used. Irradiation is performed to reduce the difference in fusion strength between the seal edges formed at the respective portions.
  • FIG. 1 is a schematic perspective view which shows an example of the manufacturing method of the underpants type disposable diaper using the laser type
  • FIG. 2 is a perspective view schematically showing a pants-type disposable diaper according to the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II of FIG.
  • FIG. 4 is a plan view schematically showing a developed and extended state of the diaper shown in FIG.
  • FIG. 5 is a perspective view schematically showing a manufacturing process of the diaper continuous body shown in FIG. 1.
  • FIGS. 7 (a) and 7 (c) are diagrams schematically showing a state where the diaper continuous body is introduced into the laser-type bonding apparatus shown in FIG. 1 in a plane
  • FIG. FIG. 6B is a cross-sectional view taken along the line II-II of FIG. 6A.
  • FIGS. 7 (a) to 7 (c) show the side seal portion (seal edge) at the same time that the continuous diaper (strip-shaped exterior body) is cut using the laser type bonding apparatus shown in FIG. It is explanatory drawing explaining a mode that it forms.
  • FIG. 8 is a view corresponding to FIG. 7C of another example of a method for manufacturing a pants-type disposable diaper using the laser-type bonding apparatus shown in FIG.
  • FIG. 9 (a) and 9 (b) are respectively a side seal portion (seal edge portion) on one side and the vicinity thereof in FIG. 3 in a state where the waist opening of the diaper shown in FIG. 3 is expanded.
  • . 10 is a cross-sectional view schematically showing a cross section taken along line III-III in FIG.
  • FIG. 11 is a view corresponding to a partially enlarged view of FIG. 6A in the first embodiment of the manufacturing method of the present invention.
  • FIG. 12 is a view corresponding to a partially enlarged view of FIG. 6A in the second embodiment of the manufacturing method of the present invention.
  • FIG. 13: is a schematic cross section which shows the light passage part and its vicinity of the laser beam in the laser type joining apparatus used for the 3rd embodiment of the manufacturing method of this invention.
  • FIG. 14 is a view showing a state in which the light passing portion of the laser beam and the vicinity thereof in the laser type apparatus shown in FIG. 13 are viewed from the outer surface side of the cylindrical roll on which the diaper continuous body (band-shaped exterior body) is arranged. is there. 15 (a) to 15 (c) are cross-sectional views showing other embodiments of the pant-type wearing article of the present invention, each corresponding to FIG.
  • the present invention relates to a pants-type wearing article that has a side seal portion that is excellent in flexibility or touch and is also excellent in tearing of the side seal portion, and a method for manufacturing the same.
  • One of the main features of the present invention includes an exterior body that forms an outer surface of a worn article, and a pair of side seals in which both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined.
  • a pant-type wearing article in which a waist opening and a pair of leg openings are formed, the side seal part is the edge of the exterior body in the front body and the edge of the exterior body in the back body is the side seal
  • the number of sheets stacked in the part where the seal edge is formed is the seal edge.
  • the difference is that a difference in bonding strength caused by the difference does not occur (hereinafter also referred to as a means for equalizing fusion strength).
  • the use of this means for uniformizing the fusion strength is, for example, irradiating a predetermined portion of the belt-shaped exterior body in a state where the front body side and the back body side are overlapped with each other in the manufacturing process of the pant-type wearing article, for example. Then, at the same time as dividing the exterior body into lengths for individual wearing articles, the cut edges of the laminated exterior body produced by the separation are fused together to form a pair of side seal portions. It is particularly useful in cases.
  • FIG. 1 shows an outline of a manufacturing method of a pants-type disposable diaper using a laser-type joining device, which can be applied to the manufacturing method of a pants-type disposable diaper that is the first embodiment of the manufacturing method of the present invention.
  • the pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) of the first embodiment of the pants-type wearing article can be manufactured using this laser-type joining device or a part of which is improved.
  • the diaper 1 of 1st Embodiment is provided with the absorptive main body 2 and the exterior body 3 which forms the outer surface of a wearing article as shown in FIGS.
  • the exterior in front body F (abdominal side part 1A)
  • the left and right side edges A1, A1 along the vertical direction X of the body 3 and the left and right side edges B1, B1 along the vertical direction X of the exterior body 3 in the back body R (back side part 1B) are joined together to form a pair of sides.
  • a pants-type disposable diaper in which seal portions 4 and 4, a waist opening 8 and a pair of leg openings 9 and 9 are formed.
  • the exterior body 3 is positioned on the non-skin contact surface side of the absorbent main body 2 and fixes the absorbent main body 2.
  • the pair of side seal portions 4, 4 in the diaper 1 extends in the longitudinal direction of the side seal portion 4, with the edge of the exterior body 3 in the front body F and the edge of the exterior body 3 in the back body R, respectively.
  • the sealing edge part 41 couple
  • the diaper 1 has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the wearer's front-rear direction in a developed and extended plan view as shown in FIG.
  • the diaper 1 can be divided into a crotch part 1C arranged at the crotch part at the time of wearing, and an abdominal side part 1A and a back side part 1B located in the longitudinal direction X.
  • the exterior body 3 in the crotch part 1 ⁇ / b> C is formed with recesses for forming leg openings 9, 9 at the left and right side edges along the vertical direction X.
  • the diaper 1 can be divided into a front body F and a back body R with a virtual center line CL that bisects the diaper 1 in the vertical direction X as a boundary.
  • a skin contact surface is a surface directed to a wearer's skin side at the time of wearing in a pants type wearing article or its constituent member (for example, an absorptive main part), and a non-skin contact surface is In the pants-type wearing article or its constituent members, it is a surface directed to the side opposite to the wearer's skin side (clothing side) when worn.
  • the vertical direction X corresponds to the direction (longitudinal direction) along the long side of the absorbent main body 2 which is a disposable diaper or its constituent member
  • the horizontal direction Y is the absorbent which is a disposable diaper or its constituent member. It coincides with the width direction of the main body 2.
  • the absorbent main body 2 has a vertically long shape in one direction (longitudinal direction X), and a surface sheet (not shown) that forms a skin contact surface; A back sheet (not shown) that forms a non-skin contact surface, and a liquid-retaining absorbent (not shown) interposed between the two sheets. And has a long shape in the same direction.
  • the absorbent main body 2 is joined to a central portion of the outer package 3 by a known joining means (adhesive or the like) so that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1 in the unfolded and extended state.
  • the expanded and extended state means that the side seal portion is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded in the expanded diaper, and the design dimensions (the influence of the elastic member is eliminated at all). In this state, it is expanded until it becomes the same size as when expanded in a flat shape.
  • the outer package 3 is arranged on the outer layer sheet 31 that forms the outer surface of the diaper 1 (non-skin contact surface of the outer package 3), and on the inner surface side of the outer layer sheet 31.
  • An inner layer sheet 32 that forms the inner surface of 1 (skin contact surface of the exterior body 3), and a plurality of thread-like or belt-like elastic members 5, 6, and 7 fixed between the sheets 31 and 32 with an adhesive. It is configured to include.
  • the two sheets 31 and 32 are joined to each other at a predetermined site by an adhesive or heat seal (not shown).
  • the exterior body 3 (the outer layer sheet 31 and the inner layer sheet 32) includes a resin material and is formed using the resin material as a main component.
  • the resin material includes a heat-sealable synthetic resin such as polyethylene, polyethylene terephthalate, and polypropylene.
  • the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.
  • the manufacturing method of the diaper 1 which is the 1st embodiment of the manufacturing method of this invention makes the formation plan site
  • a laser beam By irradiating a laser beam through a light passing portion 27 extending in a direction intersecting the transport direction A of the outer package 3 to the formation pressure site of the polymerization pressure step and the side seal portion in a pressurized state And a side seal part forming step of forming the side seal part 4 by fusing the cut edges of the laminated outer case produced by the division, and cutting the outer package 3.
  • the main body fixing process which fixes the absorptive main body 2 to the strip
  • the belt-shaped outer package 3 (outer layer sheet 31, inner layer sheet 32) is folded in the width direction.
  • the front body side and the back body side of the strip-shaped exterior body 3 to which the absorbent main body 2 is fixed are overlapped with each other, whereby “a precursor of a pants-type disposable diaper in which a side seal portion is not formed is unidirectional.
  • a continuous diaper 10 is produced.
  • sticker part formation process as shown in FIG. 1, the strip
  • the pants comprising the exterior body 3 having a pair of side seal portions 4 and 4 by fusing the cut edges of the plurality of exterior bodies 3 (the outer layer sheet 31 and the inner layer sheet 32) in a laminated state generated by The mold disposable diaper 1 is continuously manufactured.
  • the waist elastic member 5 forming the waist gather, the waist elastic member 6 forming the waist gather, and the leg elastic member 7 forming the leg gather have a predetermined elongation rate.
  • a plurality of each are arranged in the stretched state.
  • the leg elastic member 7 is arranged while forming a predetermined leg-circumferential pattern via a known swing guide (not shown) that reciprocates perpendicular to the sheet flow direction.
  • an adhesive coating machine (see FIG. (Not shown) to apply hot melt adhesive.
  • the elastic members such as the waist elastic member 5 and the waistline elastic member 6 are divided by the laser light irradiation in the sheets 31 and 32 (the portion where the side seal portion 4 is to be formed, FIG. 6A). And when it is arranged in an extended state so as to straddle the part to be divided indicated by reference numeral 10C in FIG. 6 (b), avoids inconveniences such as significant shrinkage of the elastic member and disconnection of the elastic member after the division. Therefore, it is preferable to apply an adhesive to the portion and the vicinity thereof.
  • a hot melt adhesive is intermittently applied to the waist elastic member 5 and the waist elastic member 6 by an adhesive application machine (not shown) before being arranged between the sheets 31 and 32. May be.
  • a plurality of joint portions for joining the belt-like outer layer sheet 31 and the belt-like inner layer sheet 32 between the two adjacent waistline elastic members 6 and 6, It is also preferable to use a convex roll and a corresponding joining means (not shown) such as an anvil roll. Thereafter, if necessary, a plurality of waistline elastic members 6 and a plurality of leg portion elasticities are made by using elastic member precut means (not shown) so as to correspond to positions where the absorbent main body 2 described later is disposed. The member 7 is pressed and divided into a plurality of pieces so that the contraction function is not expressed. Examples of the elastic member precut means include an elastic member dividing portion used in the method for manufacturing a composite elastic member described in JP-A-2002-253605.
  • an adhesive such as a hot melt adhesive is applied in advance to the absorbent main body 2 manufactured in a separate process (not shown), and the absorbent main body 2 is rotated by 90 degrees. Then, it is intermittently supplied and fixed on the inner layer sheet 32 constituting the strip-shaped outer package 3.
  • the adhesive for fixing the absorbent main body may be preliminarily applied not to the absorbent main body 2 but to the position where the absorbent main body 2 is arranged in the inner layer sheet 32.
  • leg hole LO ' is formed inside the annular part enclosed by the leg part elastic member 7 in the strip
  • This leg hole forming step can be carried out by using a technique similar to that in a conventional method for manufacturing this type of article, such as a rotary cutter and a laser cutter.
  • the leg hole is formed after the absorbent main body 2 is arranged on the belt-shaped outer package 3, but the leg hole may be formed before the absorbent main body 2 is arranged.
  • the strip-shaped exterior body 3 is folded in the width direction (a direction perpendicular to the conveying direction of the exterior body 3). More specifically, as shown in FIG. 5, both side portions 3 a, 3 a along the transport direction of the strip-shaped exterior body 3 are folded back so as to cover both ends in the longitudinal direction of the absorbent main body 2. After fixing both ends in the longitudinal direction, the outer package 3 is folded in the width direction together with the absorbent main body 2 (polymerization step in the polymerization pressure step). In this way, the diaper continuous body 10 is obtained.
  • the diaper continuous body 10 thus manufactured is irradiated with laser light using a laser bonding apparatus 20 to form a pair of side seal portions 4 and 4 (side seal portion).
  • a pants-type disposable diaper 1 having an exterior body 3 having a pair of side seal portions 4 is continuously manufactured.
  • the laser type bonding apparatus 20 will be described.
  • the laser type bonding apparatus 20 is arranged in a hollow cylindrical roll 23 that is rotationally driven in the direction of arrow A and a hollow portion of the cylindrical roll 23 as shown in FIG.
  • a belt-type pressure device 26 including an irradiation head 35 that irradiates a laser beam 30 toward a cylindrical (annular) support member 21 that forms a peripheral surface portion 23, and an endless pressure belt 24 (pressing member).
  • the laser-type joining device 20 includes a tension adjusting mechanism (not shown) that can adjust the tension of the pressure belt 24 wound around the outer peripheral surface of the annular support member 21 (the peripheral surface portion of the cylindrical roll 23). By adjustment, the pressure applied to the diaper continuous body 10 (sheet laminated body) can be appropriately adjusted by the support member 21 and the pressure belt 24.
  • the support member 21 forms a peripheral surface portion (contact portion with the workpiece) of the cylindrical roll 23, and is between a pair of annular frames 22, 22 that form both ends of the cylindrical roll 23 in the rotation axis direction. It is pinched and fixed.
  • the support member 21 is made of a metal material such as iron, aluminum, stainless steel, or copper, or a material having heat resistance such as ceramics.
  • the support member 21 has a light passage portion 27 through which laser light can pass. As shown in FIG. 1, FIG. 6A and FIG. 6B, the support member 21 has a slit-like opening 27 that penetrates the support member 21 in the thickness direction as a light passage portion. .
  • the opening 27 has a rectangular shape in plan view, and the longitudinal direction of the opening 27 intersects with the conveyance direction A of the diaper continuous body 10 (band-shaped exterior body 3).
  • a plurality of cylinders are formed at predetermined intervals in the circumferential direction of the cylindrical support member 21 so as to coincide with the direction parallel to the axial length direction of the rotation shaft (the direction indicated by the symbol X in FIG. 6A).
  • the support member 21 allows the laser light to pass through the opening 27, but does not allow the laser light to pass (transmit) at portions other than the opening 27.
  • a method of forming the opening 27 in the support member 21 1) etching, punching, laser processing, or the like at a predetermined position of the support member 21 made of a single annular member having the same length as the circumferential length of the annular frame 22. 2)
  • the support member 21 is replaced with a single annular member, and a plurality of curved rectangular members are used as the support member 21, and the plurality of members are connected between the pair of frames 22, 22.
  • a method of arranging the frame body 22 at a predetermined interval in the circumferential direction may be mentioned.
  • the interval between two adjacent members forms a slit-shaped opening 27.
  • the method 2) is used.
  • each of these members is the cylindrical shape of the cylindrical roll 23. It is rotationally moved in a curved state corresponding to the peripheral surface portion.
  • a light passage portion through which laser light can pass is a support member.
  • the parting portion 10C that overlaps with the opening 27 itself is not sandwiched between the members 21 and 24, but the vicinity thereof, that is, the portion that overlaps with the vicinity of the opening 27 (opening edge) in the diaper continuous body 10. Is sandwiched between the two members 21 and 24, and therefore does not move before and after the irradiation of the laser beam, and therefore, the cutting edge portion generated by the division of the diaper continuous body 10 by the irradiation of the laser beam does not move. That is, the parting planned portion 10C of the diaper continuous body 10 (portion overlapping the opening 27 in the sheet laminate) is a portion restrained by the pressing force between the members 21 and 24, and the pressing force is practically the same. It is an affected part.
  • the support member 21 has a recess 28 on its outer surface (contact surface with the workpiece).
  • a plurality of recesses 28 are formed at predetermined intervals in the circumferential direction of the cylindrical support member 21, and a slit-shaped opening 27 is formed in a region (convex part) located between two adjacent recesses 28, 28. Is formed.
  • the opening 27 is formed in the center in the circumferential direction of the cylindrical support member 21 in the convex portion.
  • the relative thickness of the diaper continuous body 10 is relatively small. It is possible to introduce the diaper continuous body 10 onto the outer surface of the support member 21 so that a large portion (for example, an arrangement region of the absorbent main body 2) is accommodated in the recess 28. Then, when the diaper continuous body 10 is introduced onto the support member 21 in such a manner, as shown in FIG. 6B, the contact surface (the other surface) of the diaper continuous body 10 with the pressure belt 24 (pressing member).
  • the belt-type pressure device 26 includes an endless pressure belt 24 (pressing member) and three rolls 25a, 25b, and 25c that rotate while the pressure belt 24 is stretched.
  • the rolls 25a, 25b, and 25c may be drive rolls or driven rolls that rotate with the pressure belt 24.
  • the pressure belt 24 moves at the same speed as the cylindrical roll 23 (supporting member 21) by using any one or more of the rolls 25a, 25b, and 25c as a driving roll or rotating with the cylindrical roll 23.
  • the support member 21 and the pressure belt 24 are preferably maintained in a predetermined temperature range by air cooling, water cooling, or the like.
  • a metal or resin belt having heat resistance capable of withstanding the heat generated during processing can be used, for example, a metal material such as iron, aluminum, stainless steel, or the like. Can be used.
  • a belt that does not transmit the laser beam irradiated to the workpiece strip-shaped outer package 3 is usually used. You can also.
  • an irradiation head 35 that irradiates a laser beam 30 toward a support member 21 that forms a peripheral surface portion of the cylindrical roll 23 is provided in the hollow portion of the hollow cylindrical roll 23.
  • the irradiation head 35 is a galvano scanner (device having a mirror on the motor shaft) that freely scans the laser light 30, and the laser light 30 is in a direction parallel to the rotation axis of the cylindrical roll 23 (reference numeral in FIG. 6A).
  • a mechanism for making the spot diameter of the laser beam 30 constant is provided.
  • the laser irradiation mechanism has such a configuration, so that the irradiation point of the laser light 30 is the circumferential direction of the cylindrical roll 23 and a direction orthogonal to the circumferential direction (a direction indicated by a symbol X in FIG. 6A). It can be arbitrarily moved in both directions of a direction parallel to the rotation axis of the roll 23).
  • the diaper continuous body 10 includes a support member 21 that forms a peripheral surface portion of a cylindrical roll 23 that is rotationally driven in the direction of arrow A in a state where a predetermined tension is applied by a guide roll (not shown). After being transported by a predetermined distance in the circumferential direction by rotation of the cylindrical roll 23 so as to be wound around the support member 21, it is separated from the support member 21 by an unillustrated lead roll, nip roll or the like. . As described above, the diaper continuous body 10 is wound around the support member 21 forming the peripheral surface portion of the cylindrical roll 23 with a predetermined tension and is conveyed so as to be in pressure contact with the pressure belt 24.
  • the portion sandwiched between the support member 21 and the pressure belt 24 and the vicinity thereof are in a state of being pressurized (compressed) in the thickness direction from before being divided by the laser light irradiation.
  • the diaper continuous body 10 contains a nonwoven fabric, the diaper continuous body 10 can be more efficiently compressed, and as a result, the diaper continuous body 10 being compressed is irradiated with laser light.
  • this it becomes possible to fuse the cut edges of the plurality of sheets (exterior body 3) constituting the divided portion more reliably, and the side seal portion 4 can be fused. The strength is improved.
  • the rotation angle of the support member 21 (cylindrical roll 23) from when the diaper continuous body 10 is introduced onto the support member 21 to when the diaper continuous body 10 leaves the diaper continuous body 10 can be, for example, 90 degrees or more and 270 degrees or less. Is 120 degrees or more and 270 degrees or less.
  • the range of the angle (pressure contact angle) at which the diaper continuous body 10 is pressed against the support member 21 by the pressure belt 24 (pressing member) is the entire circumference of the cylindrical support member 21 (cylindrical roll 23). When the pressure contact is 360 degrees, it is preferably 90 degrees or more and 270 degrees or less, and more preferably 120 degrees or more and 270 degrees or less.
  • one surface 10a forms the peripheral surface portion of the cylindrical roll 23 and laser light.
  • a continuous diaper brought into contact with the outer surface of the support member 21 having a slit-like opening 27 (light passage portion) through which 30 can pass and brought into a pressurized state by the support member 21 and the pressure belt 24 (pressing member).
  • the body 10 part where the side seal portion 4 is to be formed
  • the diaper continuous body 10 is divided at the same time.
  • the cut edges of the plurality of sheets (exterior body 3) in the pressurized state are fused together to form the side seal portion 4 (side seal portion forming step).
  • FIG. 7 is a diagram for explaining how the side seal portion 4 (seal edge) is formed at the same time as the diaper continuous body 10 (band-shaped sheet laminate) is divided using the laser bonding apparatus 20.
  • 7 (a) schematically shows a portion 10C (part where the side seal portion 4 is to be formed) scheduled to be divided by the laser beam 30 of the diaper continuous body 10 and its vicinity.
  • the diaper continuous body 10C in the present embodiment has a center portion in the longitudinal direction (conveying direction A) in the region where the absorbent main body 2 of the diaper continuous body 10 is not disposed. It is.
  • the outer package 3 in the diaper 1 of the present embodiment has an eight-layer structure portion in which eight sheets are stacked on the opening end portion of the waist opening portion 8 and the vicinity thereof (the total number of stacked layers is the largest).
  • the highly laminated portion (3A) and the other portions are the four-layer structure portion (low laminated portion with the smallest total number of laminated layers) 3B in which four sheets are stacked.
  • the 8-layer structure portion 3A is composed of an outer layer sheet 31 and an inner layer sheet 32 that constitute an outer body on the front body F side, and are folded back at the opening end of the waist opening 8 to form four layers.
  • the layer structure portion and the outer layer sheet 31 and the inner layer sheet 32 constituting the outer body on the rear body R side are formed of a four-layer structure portion that is folded at the opening end portion of the waist opening portion 8 to form four layers.
  • the four-layer structure portion 3B includes a two-layer structure portion composed of an outer layer sheet 31 and an inner layer sheet 32 constituting the outer body on the front body F side, and an outer layer sheet 31 and inner layer sheet constituting the outer body on the rear body R side. It consists of a two-layer structure consisting of 32.
  • the eight-layer structure portion 3A in the central portion in the width direction of the diaper 1 is folded back so that both side portions 3a and 3a of the strip-shaped outer package 3 cover both longitudinal ends of the absorbent main body 2 when the diaper continuous body 10 is manufactured. (See FIGS. 4 and 5).
  • a diaper continuous body 10 (a strip shape in which the front body side and the back body side of the diaper continuous body are stacked)
  • an eight-layer structure portion 3A in which eight sheets are stacked and a four-layer structure portion 3B in which four sheets are stacked are formed.
  • the waist elastic member 5 and the waistline portion are disposed between the sheets 31 and 32 that overlap each other.
  • the elastic member present in the parting planned portion 10C may be cut before the side seal portion forming step by means such as pre-cutting, or may be cut by laser light irradiation in the side seal portion forming step.
  • the 4-layer structure portion will be mainly described, but unless otherwise specified, the 8-layer structure portion is configured in the same manner as the 4-layer structure portion, and the side seal portion 4 is formed.
  • the sheets (inner layer sheet 32) absorb the laser beam 30 and generate heat.
  • all of the four sheets 31 and 32 constituting the parting planned portion 10 ⁇ / b> C are sheets (nonwoven fabrics) that absorb the laser beam 30 and generate heat.
  • the two sheets of the outer layer sheet 31 and the inner layer sheet 32 that overlap each other in the vicinity of the portion 10C to be divided may be joined by an adhesive or the like before the irradiation with the laser beam 30, or may be joined at all. It is not necessary.
  • the diaper continuous body 10 has one surface 10 a abutting against the support member 21, and a parting planned portion 10 ⁇ / b> C (part where the side seal portion 4 is to be formed) is on the slit-shaped opening 27.
  • the pressure belt 24 pressing member
  • the pressure belt 24 is pressed against the other surface 10b so that it is conveyed in the direction of the arrow A while being introduced onto the support member 21 that rotates in the direction of the arrow A so as to be positioned in the direction of the thickness A.
  • Pressure compression
  • the laser beam 30 is irradiated through the opening part 27 from the supporting member 21 side with respect to the parting part 10C to be divided in such a conveyance and pressurization state.
  • the irradiation point of the laser beam 30 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roll 23, and is set to scan following the movement of the opening 27 along the circumferential direction. Therefore, the laser beam 30 is continuously irradiated for a certain period of time to the parting planned portion 10C located on the opening 27 during the conveyance.
  • the forming materials (fibers, etc.) of the sheets 31 and 32 existing in the parting portion 10C are vaporized by the heat generated by the direct irradiation of the laser light 30 and disappear.
  • the forming material existing in the vicinity of the parting portion 10 ⁇ / b> C is indirectly heated by the laser beam 30 and melted.
  • the parting plan part 10C of a four-layer structure is melted, and in a form in which a single sheet sheet laminate (diaper precursor) is cut from the diaper continuous body 10,
  • the cut edges of the four sheets 31 and 32 in the sheet laminate of the single sheets produced by the division, and the diaper continuous 10 are fused together.
  • Each of these cut edges is pressed (compressed) by being sandwiched between the support member 21 and the pressure belt 24 from before the formation (before the diaper continuous body 10 is divided by irradiation with the laser beam 30). ).
  • the strip-shaped exterior body 3 is divided by the single laser light irradiation, and the exterior body 3 in the two pressurized states generated by the division is thus obtained.
  • the fusion and separation are the same with approximately half the laser output compared to the method of fusing the two fusion places with two laser irradiations. It can be carried out in a process, and the diaper 1 can be manufactured efficiently.
  • the cut edges of the sheets 31 and 32 are heated and melted during the irradiation of the laser beam 30 and immediately after the end of the irradiation, but are separated from the diaper continuous body 10 by the irradiation of the laser beam 30.
  • Each of the leaf diaper precursor and the diaper continuum 10 is maintained in the pressurized state by the support member 21 and the pressure belt 24, and after the irradiation is completed, the air is applied to the outside air, the support member 21 and the pressure belt 24.
  • the material is quickly cooled and solidified by heat transfer to form the fused portion 40 in which the forming material (fibers, etc.) of the cut edge is fused and integrated.
  • the fused part 40 one of the pair of side seal parts 4, 4 in one diaper 1 is formed.
  • the cutting edge portions of the sheets 31 and 32 may be forcibly cooled by using known cooling means such as a suction device and an exhaust device to promote the formation of the fused portion 40.
  • the laser beam 30 seems to hit another opening 27 adjacent to the irradiation direction in the direction opposite to the conveyance direction A. And is irradiated to another parting planned portion 10C located thereabove through the other opening 27.
  • another part 10C to be divided is divided and fused in the same manner as described above, and the other side seal part 4 (fused part 40) that forms a pair with the previously formed side seal part 4 is formed.
  • the pants-type disposable diaper 1 including the exterior body 3 having the pair of side seal portions 4 and 4 is continuously manufactured.
  • the diaper is larger than the width W of the slit-shaped opening 27 irradiated with the laser beam 30 (see FIG. 7B.
  • the portion 27 may be located at a portion sandwiched between a pair of opening edges along a direction orthogonal to the conveyance direction A. That is, in the diaper continuous body 10, even in a portion that is not sandwiched between the support member 21 and the pressure belt 24 (pressing member), in the vicinity of the opening 27 (opening edge), that is, as described above, The fused part 40 can be formed if the pressure applied by the clamping between the members 21 and 24 is practically affected.
  • the side seal portion 4 includes an edge portion 3F of the outer body 3 in the front body F and an edge portion 3R of the outer body 3 in the rear body R.
  • the sealing edge part 41 couple
  • the seal edge 41 has an outer edge 4a composed of the fused portion 40 in the cross section orthogonal to the direction in which the side seal portion 4 extends when worn. It has a shape recessed toward the inside.
  • the fused portion 40 in the seal edge portion 41 has a narrow width W4 that appears on the outer surface of the diaper in the same cross section, and the width W4 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less. It is.
  • bond part 40 of the seal edge part 41 in this invention has the constant width W4 which appears on the outer surface of a pants
  • the width W4 appearing on the outer surface of the pants-type wearing article is constant over the entire length in the longitudinal direction of the side seal part 4 and the maximum value of the width W4 in the entire range in the longitudinal direction of the side seal part 4 It means that the difference from the minimum value of the width W4 is less than 50% of the maximum value.
  • the fusion strength can be provided substantially constant while maintaining the flexibility W, the touch, etc., with the width W4 being substantially constant.
  • the width W4 is narrow as described above. Considering the size of the entire product, even if the width W4 of the side seal portion 4 is swung by 50%, the width W4 is substantially narrow and has the above-described fusion strength and appearance. .
  • the direction where the side seal part 4 is extended is extended.
  • the side seal part 4 (seal edge part 41) generated by the above-mentioned division in the cross section in the direction perpendicular to the horizontal direction (the same direction as the lateral direction Y of the diaper 1) is the outer edge 4a formed by the outer edge of the fused part 40.
  • a fusion arcuate portion 40 of the four sheets 31 and 32 constituting the outer package 3 is formed on the inner side of the diaper 1 including the outer edge 4a and more on the inner side of the diaper 1 than the outer arc 4a.
  • the fusion part 40 is formed, and the center part in the thickness direction of the exterior body 3 (the vertical direction in FIG. 7C or FIG. 8) is wider than the both end parts (upper end part and lower end part). . More specifically, the fusion part 40 has a width of the fusion part 40 toward the center part in the thickness direction in a cross-sectional view along the lateral direction Y of the diaper 1 (direction orthogonal to the dividing direction by the laser beam). It gradually becomes wider and is formed in a so-called crescent or half-moon shape (the fused portion 40 shown in FIG. 7 (c) has a crescent shape). It is preferable that the seal edge part 41 has such a shape even in a worn state.
  • the side seal portion 4 is harder and softer than other parts of the diaper 1 due to the presence of the fused portion 40 formed by melting and solidifying the sheet forming material, and causes the feeling of wearing the diaper 1 to be reduced.
  • the fusion part 40 is formed in a crescent shape or a half moon shape in a cross-sectional view in the width direction of the diaper 1 as described above, the fusion part in the conventional side seal part (for example, in Patent Document 1) Compared to the case where it is formed in a rectangular shape in the same sectional view as shown in FIG. 1 (part indicated by reference numeral 9), the corner 3S of the side edge portion of the exterior body 3 constituting the side seal portion 4 is formed.
  • the wearing feeling of the diaper is improved as compared with the conventional product.
  • the central portion in the thickness direction of the side edge of the exterior body 3 (the corner 3S on the one surface side of the exterior body 3 and the 3S on the other surface side, which is a part that greatly affects the fusion strength of the side seal portion 4) Since a sufficient amount of the fused portion 40 exists in the center portion between the side portions), the side seal portion 4 has a practically sufficient fusion strength, and the side seal portion 4 is worn while the diaper 1 is worn. Inconveniences such as tearing of the seal 4 hardly occur.
  • the side seal part 4 (fusion
  • 9A and 9B show the side seal portion 4 (fused portion 40) in a state where the waist opening 8 is expanded when the diaper 1 is worn. In the state where the waist opening 8 is expanded, the side seal portion 4 is normally in a state where the fused portion 40 is exposed as shown in FIG. 9A, but the outer edge 4a of the side seal portion 4 is the exterior. It is difficult to visually recognize from the outside due to the convex arc shape toward the inside of the body 3 and the fact that the fused portion 40 is smaller than the conventional side seal portion (fused portion).
  • the outer edge 4a of the side seal portion 4 has a convex arc shape toward the inner side of the exterior body 3, so that depending on the forming material of the sheets 31, 32, as shown in FIG.
  • the corner 3S of the side edge of the exterior body 3 on the abdominal side 1A side and the corner of the side edge of the exterior body 3 on the back side 1B side The portion 3S may approach and the separation distance between the corner portions 3S and 3S may be reduced. Therefore, the fusion part 40 located between the two corners 3S and 3S is difficult to touch by the hand and is located on the outer side of the diaper 1 closer to the diaper 1 than the fusion part 40. Therefore, not only the feeling of wearing the diaper 1 but also the appearance is improved.
  • the laser beam irradiated to the diaper continuous body 10 is absorbed by the sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the outer package 3 to generate heat.
  • a laser beam having a wavelength is used.
  • the “sheet constituting the exterior body” is not limited to the sheet (for example, the outer layer sheet 31 in the above-described embodiment) constituting one surface of the exterior body (the contact surface with the support member 21). Any sheet may be used as long as the sheet is configured. Whether or not the laser light applied to the exterior body has an oscillation wavelength that is absorbed by the sheet and generates heat for the individual sheets constituting the exterior body depends on the material of the sheet and the laser light to be used.
  • the laser beam may be CO 2 laser, YAG It is preferable to use a laser, an LD laser (semiconductor laser), a YVO4 laser, a fiber laser, or the like.
  • the oscillation wavelength that can be absorbed by the sheet and cause the sheet to generate heat is, for example, 8.0 ⁇ m or more and 15 It is preferable to use 0.0 ⁇ m or less, and it is particularly preferable to use an oscillation wavelength of 9.0 ⁇ m or more and 11.0 ⁇ m or less of a CO 2 laser in which a high-power laser device exists.
  • the spot diameter of laser light, laser output, and the like can be appropriately selected in consideration of the material and thickness of the sheet constituting the exterior body.
  • the diaper 1 having a pair of side seal portions 4 and 4 obtained through the process of dividing and welding the exterior body 3 at the same time is excellent in flexibility and touch of the side seal portion 4 and has a good wearing feeling. It is.
  • the diaper continuous body 10 has a portion where the number of laminated sheets is different, such as the 8-layer structure portion and the 4-layer structure portion, the number of the laminated sheets is formed on the seal edge portion constituting the side seal portion. A difference in fusion strength due to the difference is likely to occur. Therefore, in the first embodiment of the manufacturing method of the present invention, the difference in fusion strength due to the difference in the number of laminated side seal portions is reduced by the method described below.
  • a slit-like opening (light passing) Part) 27 is irradiated with a laser beam 30 to divide the strip-shaped outer package in the diaper continuous body 10, and the cut edges of the laminated outer package produced by the division are fused to form a seal edge.
  • the laser beam 30 is linearly scanned in one direction along the longitudinal direction of the light passage portion 27, and the output or scanning speed of the irradiated laser beam is determined by the above-described eight-layer structure portion. (Highly laminated portion) 3A is different from that when the above-described four-layer structure portion (low laminated portion) 3B is irradiated.
  • the portion 10C to be formed of the side seal portion of the diaper continuous body 10 (band-shaped outer package 3) has eight layers due to the difference in thickness.
  • the structure portion 3A is more easily pressed than the four-layer structure portion 3B. Then, in the state where the 8-layer structure portion 3A is pressed more strongly than the 4-layer structure portion 3B, the laser beam is not changed in spot diameter and laser output, and the central portion of the slit-shaped opening 27 (light passage portion).
  • the fusion strength 41 is higher than the fusion strength generated in the four-layer structure portion (low lamination portion) 3B.
  • laser light is irradiated to the formation site of the side seal portion by linearly scanning along the longitudinal direction of the slit-shaped opening (light passage portion).
  • the output value of the laser beam while irradiating the laser beam to the 8 layer structure portion (high lamination portion having the largest total number of laminations) 3A is changed to the four layer structure portion (low lamination portion having the smallest total lamination number).
  • Reduced compared to the output value during irradiation of 3B, or scanned linearly along the longitudinal direction of the slit-shaped opening (light passage part) and laser light is applied to the site where the side seal part is to be formed.
  • the scanning speed of the laser beam while the laser beam is radiated to the 8-layer structure portion (high stack portion where the total number of stacked layers is the largest) 3A is low.
  • (Laminated part) 3B irradiated And faster than the scanning speed between that.
  • the first embodiment of the pant-type wearing article of the present invention forms the sealing edge 41 having the same fusion strength between the 8-layer structure portion 3A and the 4-layer structure portion 3B by such a method.
  • the seal edge portion 41 formed on the side seal portion 4 is formed from the 8-layer structure portion 3A to the 4-layer structure portion 3B, and has a fusion strength of 4 in the 8-layer structure portion 3A.
  • the fusion strength in the layer structure portion 3B is equal.
  • the fusion strength is the maximum when the fusion strength is measured by the following method for each of a plurality of portions where the total number of stacked sheets in the side seal portion 4 is different from each other. It means that the fusion strength value (maximum value) of the part and the fusion strength value (minimum value) of the part having the smallest fusion strength are within the average fusion strength value ⁇ 30%, respectively. .
  • the average fusion strength is an average value of the fusion strength measured over the entire side seal including at least one point for each of the portions where the total number of laminated sheets is different.
  • the side seal part 4 is located in the center in the longitudinal direction, and has a width having a part of the outer body 3 on the front body F side and a part of the outer body 3 on the rear body R side on both sides thereof.
  • a 10 mm strip-shaped test piece is cut out, and the test piece is fixed between chucks of a tensile tester (for example, Tensilon “RTC series” manufactured by A & D). Then, the test piece is pulled at an extension speed of the interval between chucks of 300 mm / min until the outer body 3 on the front body F side and the outer body 3 on the rear body R side are completely divided in the longitudinal direction. .
  • the maximum value of the tensile stress at that time is defined as the fusion strength.
  • the side seal part 41 is formed by forming the seal edge part 41 connected in step S4, so that the side seal part 4 is excellent in flexibility and touch. Further, the seal edge portion 41 has a fusion strength in the 8-layer structure portion 3A formed in the vicinity of the opening end portion on the waist opening portion 8 side in the 4-layer structure portion 3B formed on the leg opening portion 9 side.
  • the fusion strength formed on the 8-layer structure portion 3A can be kept lower than when the 8-layer structure portion 3A and the 4-layer structure portion 3B are irradiated with laser light under the same conditions. Therefore, when removing the diaper (wearing article), it is easy to tear the side seal portion 4 from the waist opening 8 side, and the diaper (wearing article) removal operation can be performed smoothly.
  • the sealing edge is a “sheet” such as the 8-layer structure portion 3A and the 4-layer structure portion 3B.
  • the fusion strength measured by the measurement method described above is preferably 18 N / 10 mm or less, more preferably 15 N / 10 mm or less, and preferably 1.5 N / 10 mm or more, more preferably 2 N / 10 mm or more.
  • an opening 27A (light passage portion) is provided.
  • the irradiation of the laser beam through the slit-shaped opening 27 (light passage portion) is performed by using the laser beam 30 at the center of the slit-shaped opening 27 (light passage portion) without changing the spot diameter and the laser output.
  • the scanning is performed at a constant speed in one direction. Except these, the diaper 1 of 1st Embodiment is manufactured similarly to a 1st embodiment.
  • the diaper continuous body 10 (band-shaped exterior body 3) in a state where the front body side and the back body side are overlapped is introduced into a cylindrical roll 23 having a peripheral surface portion made of a support member 21A.
  • the opening 27A is formed with respect to the formation planned portion 10C of the side seal portion of the diaper continuous body 10 (band-shaped outer package 3) while applying pressure between the pressure belt 24 and the support member 21A.
  • the laser beam 30 is irradiated. As shown in FIG.
  • the opening 27 ⁇ / b> A (light passage portion) in the support member 21 ⁇ / b> A is an eight-layer structure portion (total) of the planned portion 10 ⁇ / b> C of the side seal portion of the diaper continuous body 10 (band-shaped exterior body 3).
  • a high lamination portion with the largest number of layers a wide portion 52 in a portion overlapping with 3A, and a width narrower than the wide portion 52 in a portion overlapping with a four-layer structure portion (low lamination portion with the smallest total number of laminations) 3B It has a narrow portion 53.
  • the 8-layer structure portion 3A of the side seal portion formation planned portion 10C is pressed by both side portions sandwiching the narrow portion 53 in the support member 27A.
  • the light 30 is irradiated, and the four-layer structure portion 3B is irradiated with the laser light 30 while being pressed by both side portions of the support member 27A across the wide portion 52. Therefore, even if there is a thickness difference due to the number of stacked sheets between the 8-layer structure portion 3A and the 4-layer structure portion 3B, the front body F to be fused between the 8-layer structure portion 3A and the 4-layer structure portion 3B.
  • the close contact state between the side exterior body and the back body R side exterior body can be made the same.
  • the fusion strength of the seal edge formed by the fusion of the cut edge caused by the division of the 8-layer structure portion 3A, and the four-layer structure portion 3B The difference between the sealing strength of the seal edge formed by the fusion of the cut edge caused by the division can be reduced, and the seal having the same fusion strength in the 8-layer structure portion 3A and the 4-layer structure portion 3B.
  • the formation of the edge portion 41 is also facilitated.
  • the width of the light passage portion 27 is changed by using the support member that changes in the longitudinal direction of the light passage portion, and the laser light is irradiated through the light passage portion, thereby making it flexible. It is possible to efficiently form a side seal that is excellent in property and touch and is easy to tear.
  • the ratio (W2 / W1) of the width W2 of the narrow portion 53 to the width W1 of the wide portion 52 is, for example, preferably 0.025 or more, more preferably 0.05 or more, and preferably 0.00. It is 9 or less, more preferably 0.85 or less, preferably 0.025 to 0.9, more preferably 0.05 to 0.85.
  • FIG. 13 is an explanatory diagram of a third embodiment of the manufacturing method of the present invention for manufacturing the diaper 1 of the first embodiment.
  • the exterior body 3 side is located near the opening 27 (light passage portion) in the outer surface 21a with which the strip-shaped exterior body 3 contacts.
  • the support member 21 ⁇ / b> B has a protrusion 45 that protrudes in the height direction, and the height 45 h of the protrusion 45 changes discontinuously along the longitudinal direction of the opening 27 (light passage portion).
  • the light passing portion through which the laser light can pass is composed of the slit-shaped opening 27 that penetrates the support member 21 in the thickness direction.
  • the portion overlapping with the opening portion 27 does not generate pressure applied by being sandwiched between the support member 21 and the pressure belt 24 (pressing member). Since the applied pressure is a portion that is substantially affected, the fused portion 40 is formed. In order to form the fused portion 40 more stably, it is effective to further increase the pressure applied by the clamping between the members 21 and 24.
  • a protruding portion 45 is formed on the outer surface 21a on the outer diaper continuous body 10 side (on the belt-shaped outer package 3 side and the pressure belt 24 side) with respect to the outer surface 21a. More specifically, the protrusion 45 is formed along each of a pair of opening edges extending in the longitudinal direction of each of the plurality of openings 27 (the width direction of the support member 21) on the outer surface 21 a of the support member 21. Each protrusion 45 is formed to extend in the longitudinal direction along the opening 27.
  • Each protrusion 45 has a high-order part 45a and a low-order part 45b having different protrusion heights 45h (projection heights from the peripheral part) in the longitudinal direction.
  • the lower part 45b has a lower protrusion height 45h than the higher part 45a.
  • the top of the protrusion 45 may be flat or a curved surface having a predetermined curvature, and the curved surface may be parallel to the outer surface 21 a of the cylindrical support member 21.
  • a protruding part 45 having a high-order part 45a is formed, so that the diaper continuous body 10 (strip-shaped exterior body) is provided in the vicinity of the high-order part 45a.
  • the diaper continuous body 10 strip-shaped exterior body
  • the low-order part 45b the applied pressure in the vicinity of the part to be divided in the diaper continuous body 10 (strip-shaped exterior body) can be effectively reduced as compared with the vicinity of the high-order part 45a.
  • the light passage portion 27 in the support member 27A is used for the four-layer structure portion (low lamination portion having the smallest total number of laminations) 3B in the portion 10C where the side seal portion is to be formed.
  • the laser beam 30 is radiated in a state of being strongly pressed by the sandwiched high-level portions 45a, and the light-passing portion 27 in the support member 27A is applied to the eight-layer structure portion (high-layered portion having the largest total number of layers) 3A.
  • the laser beam 30 is irradiated in a state in which the lower portion 45b on both sides is held weaker than the higher portion 45a.
  • the front body F to be fused between the 8-layer structure portion 3A and the 4-layer structure portion 3B.
  • the close contact state between the side exterior body and the back body R side exterior body can be made the same.
  • the fusion strength of the seal edge formed by the fusion of the cut edge caused by the division of the 8-layer structure portion 3A, and the four-layer structure portion 3B A difference between the sealing strength of the sealing edge formed by the fusion of the cut edge caused by the division can be reduced, and the sealing with the same fusion strength in the 8-layer structure portion 3A and the 4-layer structure portion 3B.
  • the formation of the edge portion 41 is also facilitated.
  • the support member 27B in which the protrusion height of the protrusion 45 changes along the longitudinal direction of the light passage portion 27 is pressed by the support member 27B.
  • the protrusion height 45h (see FIG. 13) of the protrusion 45 is preferably 0.1 mm or more, more preferably 1 mm or more, and preferably It is 10 mm or less, More preferably, it is 8 mm or less, Preferably it is 0.1 mm or more and 10 mm or less, More preferably, it is 1 mm or more and 8 mm or less.
  • the width 45w of the protrusion 45 is preferably 1 mm or more, more preferably 2 mm or more, and preferably 20 mm or less, more preferably.
  • the lower portion 45b has a height difference from the higher portion 45a of preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically, Preferably they are 0.1 mm or more and 5 mm or less, More preferably, they are 0.2 mm or more and 4 mm or less.
  • the lower portion 45b may be a portion that does not protrude from the outer surface 21a of the support member 21 at all, instead of protruding from the outer surface 21a of the support member 21 with the same width as that of the high portion 45a.
  • the side seal part 4 (fusion part 40) becomes difficult to visually recognize from the outside in the wearing state or the natural state (contracted state) of the diaper 1, for example, after the use of the diaper 1, the protection from the infant who is the wearer When a person (for example, a mother) removes the diaper, it is difficult to find the side seal portion 4, and there is a possibility that it takes time to remove the diaper 1.
  • the color of the constituent member of the diaper 1 that crosses the side seal portion 4 is set to the ventral side of the side seal portion 4. The method of making it differ by (front side) and back side (rear side) is mentioned.
  • a method of changing the color of the sheet 32 or the like When such a method is employed, the side seal portion 4 is positioned at the color switching portion, so that the visibility of the side seal portion 4 is further enhanced, and the occurrence of the inconvenience is further effectively prevented.
  • the side seal portion is to be formed in the belt-shaped exterior body (diaper continuous body 10) in a state where the front body side and the back body side are overlapped.
  • the fusion strength obtained at the seal edge is often different even when laser light irradiation is performed under the same conditions as when no adhesive is present. The reason is that if the adhesive is present, the strength is lowered, the energy required for fusing is consumed to dissolve the adhesive, the adhesive becomes a foreign substance, and the fusing is inhibited.
  • the means for applying that has been adopted as a means for adjusting the fusion strength with the adhesive present between the sheets.
  • the relationship between the conditions for applying (adhesion strength adjustment) and the obtained fusion strength is investigated, and then the conditions of the means such as, for example, the difference in the fusion strength of the portions having different total number of laminated layers are reduced. It is preferable to finely adjust the output of the laser light, the scanning speed of the laser light, the width of the light passage portion, the height and width of the protrusion 45, and the like.
  • belt-shaped exterior body (diaper continuous body 10) of the state which accumulated the front body side and the back body side was piled up.
  • Means for adjusting the fusion strength for each mode of the adhesive to be present in each part even when the adhesive is present between the sheets in the site and the mode in which the adhesive is present differs depending on the site where the total number of laminated sheets is different.
  • the relationship between the conditions for applying the means adopted (adhesion strength adjustment) and the resulting fusion strength is examined, and the results are used to reduce the difference in the fusion strength of the parts with different total number of layers.
  • the means it is preferable to finely adjust the conditions of the means. More specifically, it is preferable to finely adjust the output of the laser beam, the scanning speed of the laser beam, the width of the light passing portion, the height of the protruding portion 45, the width of the protruding portion 45, and the like.
  • the mode in which the adhesive is present differs depending on the part where the total number of laminated sheets is different.
  • both side portions 3 a and 3 a along the conveying direction of the strip-shaped exterior body 3 are folded back so as to cover both longitudinal ends of the absorbent main body 2, and the folding is performed.
  • the portion is fixed to the opposite surface with an adhesive, the above-mentioned 8-layer structure portion 3A in the site where the side seal portion is to be formed is laser-exposed to the 8-layer structure portion because the adhesive exists between the sheets. It becomes difficult to obtain fusion strength at the seal edge formed by irradiating light.
  • the output of the laser beam applied to the eight-layer structure is increased compared to the case where no adhesive is present, or the scanning speed of the laser beam is decreased as compared to the case where no adhesive is present.
  • the width W1 of the wide portion 52 of the slit-shaped opening 27 (light passage portion) is narrower than when no adhesive is present, or the height of the protrusion 45 is smaller than when no adhesive is present.
  • the width of the protrusion 45 is made narrower than that in the case where there is no adhesive.
  • the melting of the outer package using the heat source is not limited to the laser beam irradiation to the outer package, and as a non-contact heat source, infrared or halogen light may be used. It can also be carried out by thermocompression bonding of the exterior body using a known heat roll device or the like, or applying ultrasonic vibration to the exterior body using a known ultrasonic vibration device or the like.
  • segmentation of an exterior body and formation of a junction part in the said side seal part formation process may be simultaneous, and may be divided after formation of a junction part.
  • a pants-type wearing article for example, a pants-type disposable diaper
  • the pants-type wearing article shown in FIG. 15 (a) has a 6-layer structure portion 3A (a highly laminated portion having the largest total number of laminated layers) on a portion where the outer body of the front body F and the outer body of the rear body R are overlapped.
  • a four-layer structure portion (low lamination portion having the smallest total number of laminated sheets) 3B, and seal edges formed on a pair of side seal portions (not shown) are formed into six-layer structure portions 3A and 4A.
  • the layer structure portion 3B has the same fusion strength.
  • both side portions 3a, 3a along the conveying direction of the strip-shaped outer package 3 that is, the strip-shaped outer layer sheet 31 and When both sides along the conveyance direction of each belt-shaped inner layer sheet 32 are folded back so as to cover both ends in the longitudinal direction of the absorbent main body 2,
  • the belt-like outer layer sheet 31 is longer than the belt-like inner layer sheet 32 in the width direction (direction perpendicular to the longitudinal direction), and the side of the inner layer sheet 32 when the sheets 31 and 32 are overlapped. Only the extension part of the outer layer sheet 31 that extends outward from the edge is folded back so as to cover both longitudinal ends of the absorbent main body 2.
  • the parting plan part 10C of the diaper continuous body 10 is a six-layer structure part in which the opening end part of the waist opening part 8 and its vicinity are overlapped with six sheets, and the other part is four sheets. Becomes a four-layer structure part.
  • the pants-type wearing article shown in FIG. 15 (b) has an eight-layer structure portion (a highly laminated portion having the largest total number of laminated layers) 3A on the portion where the outer body of the front body F and the outer body of the rear body R are overlapped. And a 6-layer structure portion (intermediate laminated portion with a total number of laminated layers) 3C and a 4-layer structure portion (low laminated portion with the smallest total number of laminated layers) 3B, and a pair of side seal portions (not shown)
  • the sealing edge portion formed in (8) has the same fusion strength in the 8-layer structure portion 3A, the 6-layer structure portion 3C, and the 4-layer structure portion 3B.
  • the seal edge portion formed in the pair of side seal portions includes a four-layer structure portion 3D, a six-layer structure portion 3E, and a second four-layer structure portion 3B.
  • the fusion strength is equal.
  • the pants-type wearing article of each embodiment shown in FIG. 15 can be manufactured by irradiating the output of laser light weakly as the number of stacked sheets increases in the manufacturing method of the first embodiment.
  • the laser beam scanning speed can also be increased by increasing the number of stacked sheets in a portion.
  • the underpants type wearing article of embodiment shown to Fig.15 (a) is the manufacturing method of 2nd Embodiment except changing the ratio of the width
  • the manufacturing method of the third embodiment can be manufactured in the same manner as the manufacturing method of the third embodiment except that the height difference between the high-order part and the low-order part is changed.
  • the pants-type wearing article of each embodiment shown in FIGS. 15 (a) and 15 (b) has an intermediate width in addition to the wide portion and the narrow portion. It can also be manufactured by using a light passage part having an intermediate width part, or using a support member having a middle part having an intermediate height in addition to the high part and the low part.
  • the protrusion height of the protrusion is discontinuously along the longitudinal direction of the light passage in the vicinity of the light passage on the outer surface in contact with the exterior body.
  • the laser-type bonding apparatus 20 is provided with a mechanism for controlling the tension of the diaper continuous body 10. Also good.
  • the exterior body 3 in the embodiment (mode) is not divided into the abdominal part 1A and the dorsal part 1B, but the abdominal part 1A, the crotch part 1C, and the dorsal part 1B.
  • the exterior body in the present invention is not limited to such a continuous shape, and is, for example, the stomach side disposed on the wearer's stomach side (front side). It is divided
  • seat member distribute
  • the polymerization pressurizing step includes a front body side (a belt-like stomach side sheet member) of the belt-like exterior body to which the absorbent main body is fixed.
  • a site where the side seal portion is to be formed in the belt-shaped exterior body having a configuration in which the back body side (band-shaped backside sheet member) is superimposed is brought into a pressurized state.
  • Pants-type wearing articles such as pants-type disposable diapers with a split-type exterior body can also be divided into a crotch part and an abdominal side part and a back side part extending in front and rear thereof, and the abdominal sheet member is worn when worn It arrange
  • seat member is distribute
  • seat member are mutually joined in the right-and-left both sides of a pants type wearing article, and a pair of side seal part is formed.
  • pant-type wearing article in the present invention is not limited to a pant-type disposable diaper, and may be a pant-type sanitary napkin. It may be a diaper cover or the like that does not include
  • the description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.
  • An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body
  • a pants-type wearing article in which a part is formed The side seal portion includes a seal edge portion in which the edge portion of the exterior body in the front body and the edge portion of the exterior body in the back body are joined by a continuous linear fusion portion extending in the longitudinal direction of the side seal portion.
  • the seal edge is formed in a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side are different from each other,
  • the seal edge portion is a pants-type wearing article having the same fusion strength at the plurality of portions.
  • the exterior body includes an outer layer sheet that forms an outer surface of a worn article, an inner layer sheet that is disposed on the inner surface side of the outer layer sheet, and a plurality of thread-like or belt-like elastic members that are fixed between the two sheets with an adhesive.
  • the underpants-type wearing article according to the above ⁇ 1> comprising: ⁇ 3> Between the outer layer sheet and the inner layer sheet, a waist elastic member forming a waist gather, a waist elastic member forming a waist gather, and a leg elastic member forming a leg gather are stretched to a predetermined elongation rate.
  • the underpants-type wearing article according to the above ⁇ 2> wherein a plurality of each are arranged in a stretched state.
  • the exterior body in the front body and the exterior body in the back body include a waist elastic member forming a waist gather or a waist elastic member forming a waist gather
  • ⁇ 6> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 5>, wherein the sheet constituting the exterior body is a nonwoven fabric, a film, or a laminate sheet of a nonwoven fabric and a film.
  • a fusion portion between sheets constituting the exterior body is formed on the outer edge of the seal edge portion, and the fusion portion is in the thickness direction of the exterior body.
  • the outer edge of the seal edge portion has a convex arc shape toward the inside of the wearing article, and includes the outer edge and is further inward of the wearing article.
  • ⁇ 1> to ⁇ 6 wherein a fusion part between sheets constituting the exterior body is formed, and the fusion part is wider at the center in the thickness direction of the exterior body than both ends.
  • the opening end portion of the waist opening and the vicinity thereof are an eight-layer structure portion in which eight sheets are stacked, and the other portions are four-layer structure portions in which four sheets are stacked.
  • the eight-layer structure part in the center in the width direction of the pants-type wearing article has the above-described items ⁇ 1> to ⁇ 10>, wherein both side portions of the exterior body are folded back so as to cover both longitudinal ends of the absorbent main body.
  • the seal edge portion has a fusion strength value at a portion having the maximum fusion strength and a fusion strength value at a portion having the smallest fusion strength, for each of the plurality of portions where the total number of laminated layers is different from each other.
  • the pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
  • the underpants type according to any one of the above items ⁇ 1> to ⁇ 13>, wherein the color of the waist part elastic member or the sheet constituting the exterior body is different between the ventral part and the back part of the pant-type wearing article Wearing articles.
  • the pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
  • the pants-type wearing article according to any one of ⁇ 1> to ⁇ 14>, wherein the exterior body has an hourglass-like continuous shape extending from the abdominal side, the crotch part, and the back side.
  • the pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
  • the exterior body is divided into an abdominal sheet member disposed on the abdominal side part and a back sheet member disposed on the back side part, and the absorbent main body is bridged and fixed to both the sheet members.
  • the pants-type wearing article according to any one of ⁇ 1> to ⁇ 15>.
  • An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body
  • the side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part.
  • the strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
  • the laser beam is applied to a plurality of portions where the total number of laminated sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side
  • a method for manufacturing a pants-type wearing article in which irradiation is performed at different output or scanning speeds to equalize the fusion strength of the seal edge formed at each part.
  • An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body
  • the side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part.
  • the strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
  • the laser beam is applied to a plurality of portions where the total number of laminated sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side
  • a method for manufacturing a pants-type wearing article in which irradiation is performed through light passing portions having different widths to equalize the fusion strength of the seal edge formed at each portion.
  • the light passing portion has a wide portion in a portion overlapping a highly laminated portion having the largest total number of laminated layers, among the planned formation portions of the side seal portion of the continuous body of the pants-type wearing article or the belt-shaped exterior body, and the total laminated portion
  • the manufacturing method of the underpants type wearing article as described in said ⁇ 20> which has a narrow part narrower than a wide part in the part which overlaps with the low lamination
  • the ratio (W2 / W1) of the width W2 of the narrow portion 53 to the width W1 of the wide portion is preferably 0.025 or more, more preferably 0.05 or more, and preferably 0.9 or less. More preferably 0.85 or less, and preferably 0.025 to 0.9, more preferably 0.05 to 0.85.
  • the method for producing a pants-type wearing article according to the above ⁇ 21> is preferably 0.025 or more, more preferably 0.05 or more, and preferably 0.9 or less. More preferably 0.85 or less, and preferably 0.025 to 0.9, more preferably 0.05 to 0.85.
  • An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body
  • the side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part.
  • the strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
  • the side seal portion forming step a sheet and a rear portion of the front body side exterior body having a projecting portion projecting toward the exterior body side in the vicinity of the light passage portion on the outer surface in contact with the
  • the manufacturing method of the underpants type wearing article which makes equal the fusion
  • ⁇ 24> As a means for adjusting the difference in the fusion strength of the portions where the total number of stacked layers is different depending on whether or not an adhesive is present between sheets at the site where the side seal portion is to be formed.
  • the low-lamination portion with the smallest total number of laminated layers among the portions where the side seal portion is to be formed is irradiated with laser light in a state where it is strongly pressed by the high-order portions on both sides of the light passing portion of the support member. Then, the high lamination portion having the largest total number of laminated sheets is irradiated with laser light in a state where it is held weaker than the high portion at the lower portion on both sides of the light passing portion of the support member, ⁇ 23 > Or ⁇ 24> The manufacturing method of the underpants type wearing article.
  • the height difference between the low-order part and the high-order part is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically preferably
  • the manufacturing method of the underpants type wearing article as described in said ⁇ 25> which is 0.1 mm or more and 5 mm or less, More preferably, it is 0.2 mm or more and 4 mm or less.
  • a waist gather is formed between the belt-like outer layer sheet constituting the outer package continuously supplied from the raw fabric roll and the belt-shaped inner layer sheet constituting the outer package continuously supplied from the raw roll.
  • 26> The manufacturing method of the underpants type wearing article of any one of 26>.
  • ⁇ 28> By feeding and pressing a belt-like outer layer sheet and a belt-like inner layer sheet sandwiching a waist elastic member, a waistline elastic member, and a leg elastic member in a stretched state between a pair of nip rolls, a plurality of pieces are provided between the belt-like sheets.
  • the belt-like outer layer sheet and the belt-like inner layer sheet constituting the exterior body are hot-melted with an adhesive coating machine on a predetermined portion of one or both of the opposite surfaces of the two sheets before being overlapped.
  • the elastic member such as the waist elastic member, the waist elastic member, and the like in the band-shaped outer layer sheet constituting the outer package and the portion to be divided by the laser beam irradiation in the band-shaped inner layer sheet constituting the outer package
  • an adhesive is applied to the portion to be divided and the vicinity thereof when the stretched portion is arranged so as to straddle Method.
  • the waist part elastic member and the waistline part elastic member are hot melt type by an adhesive coating machine before being arranged between the belt-like outer layer sheet constituting the exterior body and the belt-like inner layer sheet constituting the body.
  • the pants-type wearing article according to any one of ⁇ 17> to ⁇ 34>, wherein the side seal portion forming step forms a pair of side seal portions by irradiating a laser beam using a laser type bonding apparatus.
  • the laser-type bonding apparatus includes a hollow cylindrical roll that is driven to rotate, and an irradiation head that is disposed in a hollow portion of the cylindrical roll and irradiates laser light toward an annular support member that forms a peripheral surface portion of the cylindrical roll.
  • a belt type pressure device provided with an endless pressure belt, and a tension adjusting mechanism capable of adjusting the tension of the pressure belt wound around the outer peripheral surface of the annular support member to adjust the tension.
  • the method for producing a pants-type wearing article according to ⁇ 35> wherein the pressure applied to the continuous body of the pants-type wearing article can be adjusted by the support member and the pressure belt.
  • the support member has a light passage part through which laser light can pass
  • the support member has a recess in the contact surface with the workpiece, and a plurality of the recesses are formed at predetermined intervals in the circumferential direction of the cylindrical support member.
  • the continuous body of the pants-type wearing article is introduced on the rotating support member so that one surface abuts the support member and the side seal portion is to be formed on the light passage portion, and the other
  • Laser beam is irradiated from the support member side through the light passing part to the part to be divided that is being transported and pressurized, and the irradiation point of the laser beam can be arbitrarily moved in the circumferential direction of the cylindrical roll By being configured to scan following the movement of the light passage portion along the circumferential direction, the part to be divided located on the light passage portion is being conveyed.
  • the laser beam is irradiated once, and the strip-shaped exterior body is divided at the same time, and the fusion of the cut edges of the exterior body in two pressurized states generated by the division is performed. 17.
  • the outer layer sheet constituting the outer package and the cut edge portion of the inner layer sheet constituting the outer package are heated and melted during the irradiation of the laser beam and immediately after the irradiation, but by the irradiation of the laser beam Irradiation is completed while the pressed state of the support member and the pressure belt of each of the diaper precursor of a single sheet cut from the continuous body of the pant-type wearing article and the continuous body of the pant-type wearing article is maintained.
  • the sheet constituting the exterior body is a synthetic resin nonwoven fabric or film,
  • the laser light when the sheet constituting the outer package includes polyethylene, polyethylene terephthalate, polypropylene, or the like as a synthetic resin, an oscillation wavelength of 8.0 ⁇ m to 15.0 ⁇ m is used.
  • ⁇ 17> to ⁇ 45 > The manufacturing method of the underpants type wearing article of any one of>.
  • ⁇ 47> The method for producing a pants-type wearing article according to any one of ⁇ 17> to ⁇ 46>, wherein the laser light has a CO 2 laser oscillation wavelength of 9.0 ⁇ m to 11.0 ⁇ m.
  • a pant-type wearing article that has a side seal portion that is excellent in flexibility or touch and that is also excellent in tearing of the side seal portion.

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Abstract

This pants-type wearable article (1) is provided with an outer body (3) forming the outer surface and is formed with a pair of side sealed parts (4), a waist opening part (8) and a pair of leg opening parts (9) by joining both edges of the outer body (3) in the front body section (F) and both edges of the outer body (3) in the rear body section (R), wherein the side sealed parts (4) form sealed edge parts (41) in which the edge part (3F) of the outer body in the front body section and the edge part (3R) of the outer body in the rear body section are joined at a fused part in the form of a continuous line extending in the lengthwise direction of the side sealed parts, the sealed edge parts (41) are formed into multiple sections (3A, 3B) in which the total laminated number of sheets constituting the outer body of the front body section and the number of sheets constituting the outer body of the rear body section are different from each other, and the fusion strength of the sealed edge parts (41) are same in the multiple sections (3A, 3B).

Description

パンツ型着用物品及びその製造方法Pants-type wearing article and manufacturing method thereof
　本発明は、サイドシール部を有するパンツ型着用物品に関する。 The present invention relates to a pants-type wearing article having a side seal portion.
　従来のパンツ型着用物品として、吸収性本体と着用物品の外面を形成する外装体とを備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部が形成されているパンツ型使い捨ておむつが知られている。 A conventional pant-type wearing article includes an absorbent main body and an exterior body that forms the outer surface of the wearing article, and both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined together. A pants-type disposable diaper in which a side seal portion is formed is known.
　通常、パンツ型使い捨ておむつを着用者の身体から取り外す際には、サイドシール部において該おむつを前身頃と後身頃とに引き裂く。おむつ使用後の交換の際におむつを速やかに身体から取り外すためには、サイドシール部は容易に引き裂くことができるようになっていることが好ましい。サイドシール部の引き裂き性に関し、例えば特許文献１には、おむつの着用中に外れたりしない程度の十分な接合強度と引き裂き性の向上との両立等の観点から、サイドシール部に３段階の接合強度を併存させることが記載されている。 Usually, when removing the pants-type disposable diaper from the wearer's body, the diaper is torn into the front body and the back body at the side seal portion. In order to quickly remove the diaper from the body when changing after using the diaper, it is preferable that the side seal portion can be easily torn. Regarding tearability of the side seal part, for example, Patent Document 1 discloses a three-stage joint to the side seal part from the viewpoint of sufficient joint strength that does not come off while wearing a diaper and improvement in tearability. It is described that the strengths coexist.
　また従来、使い捨ておむつや生理用ナプキン等の吸収性物品の製造工程においては、重ね合わせたシートどうしの接合にヒートロール装置が汎用されており、一般に、サイドシール部は、後述するように、ヒートロール装置を用いて形成される。また、他の接合方法として、レーザー光を用いて溶着する方法も知られている。例えば特許文献２には、複数枚のシートが重ねられたシート積層体を、周面にレーザー光透過性部を有する回転ロールの該周面に沿った形状に変形させて搬送しながら、該シート積層体に対して該回転ロールの内側からレーザー光を照射し、該シート積層体内のシートどうしを融着させる方法が記載されている。 Conventionally, in the manufacturing process of absorbent articles such as disposable diapers and sanitary napkins, a heat roll device has been widely used for joining stacked sheets. Generally, the side seal portion is heated as described later. It is formed using a roll device. As another bonding method, a method of welding using laser light is also known. For example, in Patent Document 2, a sheet laminate in which a plurality of sheets are stacked is deformed into a shape along the peripheral surface of a rotary roll having a laser light transmitting portion on the peripheral surface, and the sheet is conveyed. A method of irradiating the laminated body with laser light from the inside of the rotary roll to fuse the sheets in the laminated sheet is described.
　パンツ型使い捨ておむつは、通常、次のような工程を経て製造される。即ち、複数のおむつが一方向（搬送方向）に連なった構成のおむつ連続体を製造し、このおむつ連続体における、サイドシール部形成予定部位において互いに重なり合う前身頃側の外装体と後身頃側の外装体とを、ヒートロール装置等の接合手段により接合した後、その接合部をカッター等の切断手段により切断することにより、個々のおむつに分断する工程を経て製造される。こうして製造される従来のパンツ型使い捨ておむつのサイドシール部は、前身頃の側縁部と後身頃の側縁部とが合掌状に重なり合って形成されており、その合掌状部分の頂部が、周辺部よりもおむつの外方に突出しているので、目視により容易に認識できる。 ¡Pants-type disposable diapers are usually manufactured through the following processes. That is, a diaper continuous body in which a plurality of diapers are arranged in one direction (conveying direction) is manufactured, and the front body side exterior body and the back body side of the diaper continuous body are overlapped with each other at a site where the side seal portion is to be formed. After the exterior body is joined by a joining means such as a heat roll device, the joint part is cut by a cutting means such as a cutter, thereby being divided into individual diapers. The side seal part of the conventional pants-type disposable diaper manufactured in this way is formed by overlapping the side edge part of the front body and the side edge part of the back body in the shape of a palm, and the top of the palm-shaped portion is Since it protrudes outward from the diaper than the part, it can be easily recognized visually.
特開２００１－１２０５９５号公報JP 2001-120595 A 特開２０１０－１８８６２９号公報JP 2010-188629 A
　前述した製造工程を経て得られた合掌状のサイドシール部は、外装体どうしの接合幅が広いことや、接合の際に外装体が強く加圧されることなどから、比較的硬いものとなり易く、着用感や外表面の肌触りの点で改善の余地がある。また、サイドシール部を形成する部位のシートの積層枚数に差があると、その差に起因して、サイドシール部に意図しない接合強度の差が生じ、例えば、ウエスト開口部側の接合強度が高くなりすぎて、おむつの使用後に、ウエスト開口部側からサイドシール部を引き裂くことが難しくなる等といった不都合が生じる。 The palm-shaped side seal part obtained through the above-described manufacturing process is likely to be relatively hard due to the wide joining width between the exterior bodies and the exterior bodies being strongly pressed during joining. There is room for improvement in terms of wearing feeling and touch of the outer surface. Also, if there is a difference in the number of stacked sheets at the site forming the side seal part, due to the difference, a difference in unintentional bonding strength occurs in the side seal part, for example, the bonding strength on the waist opening side is Since it becomes too high, it becomes difficult to tear the side seal part from the waist opening side after use of the diaper.
　本発明は、着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型着用物品に関する。前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を形成してなる。前記シール縁部は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に亘って形成されており、前記シール縁部は、前記複数の部位における融着強度が等しい。 The present invention includes an exterior body that forms the outer surface of a worn article, and a pair of side seal portions, a waist opening, and both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined together The present invention relates to a pants-type wearing article in which a pair of leg openings are formed. The side seal portion includes a seal edge portion in which the edge portion of the exterior body in the front body and the edge portion of the exterior body in the back body are joined by a continuous linear fusion portion extending in the longitudinal direction of the side seal portion. Formed. The seal edge is formed over a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side is different from each other, and the seal edge Are equal in fusion strength at the plurality of portions.
　また本発明は、着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法に関する。本発明のパンツ型着用物品の製造方法は、前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備しており、更に下記（１）～（３）の何れかを具備する。
（１）前記サイドシール部形成工程においては、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に、前記レーザー光を、該部位毎に出力又は走査速度を異ならせて照射し、各部位に形成されるシール縁部の融着強度の差を減少させる。
（２）前記サイドシール部形成工程においては、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に、前記レーザー光を、該部位毎に幅が異なる光通過部を介して照射し、各部位に形成されるシール縁部の融着強度の差を減少させる。
（３）前記サイドシール部形成工程においては、前記帯状の外装体が接する外面における前記光通過部の近傍に、該外装体側に突出する突出部を有し、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位毎に、該突出部の突出高さ又は幅が異なる支持部材を用いて、該各部位にレーザー光の照射を行い、該各部位に形成されるシール縁部の融着強度の差を減少させる。 Further, the present invention includes an exterior body that forms the outer surface of the wearing article, and a pair of side seal portions and a waist opening are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body A pair of leg openings, and the side seal portion is a continuous line in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal portion. It is related with the manufacturing method of the underpants type wearing article which has the seal edge part couple | bonded by the shape melt | fusion part. The method for producing a pants-type wearing article of the present invention includes a polymerization pressurizing step of applying pressure to a portion where a side seal portion is to be formed in a belt-shaped exterior body in a state where the front body side and the back body side are overlapped, By dividing the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body, to the formation planned site of the side seal portion in a pressure state, A side seal portion forming step of forming the seal edge portion by fusing the cut edge portions of the laminated exterior body produced by the division, and further comprising any one of the following (1) to (3) Is provided.
(1) In the side seal portion forming step, the laser beam is applied to a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side are different from each other. The irradiation is performed with different output or scanning speed for each part, and the difference in the fusion strength of the seal edge formed in each part is reduced.
(2) In the side seal portion forming step, the laser beam is applied to a plurality of portions where the total number of stacked sheets of the sheet constituting the front body side exterior body and the rear body side exterior body is different from each other. Irradiation is performed through light passing portions having different widths for each portion, and the difference in the fusion strength of the seal edge portion formed in each portion is reduced.
(3) In the side seal portion forming step, a front body side exterior body is configured by having a projecting portion projecting toward the exterior body side in the vicinity of the light passage portion on the outer surface in contact with the belt-shaped exterior body. For each of a plurality of portions where the total number of stacked sheets constituting the outer body on the sheet and the back body side is different from each other, a support member having a different protruding height or width of the protruding portion is used. Irradiation is performed to reduce the difference in fusion strength between the seal edges formed at the respective portions.
図１は、本発明の製造方法の一実施態様であるパンツ型使い捨ておむつの製造方法に適用可能な、レーザー式接合装置を用いたパンツ型使い捨ておむつの製造方法の一例を示す概略斜視図である。FIG. 1: is a schematic perspective view which shows an example of the manufacturing method of the underpants type disposable diaper using the laser type | mold joining apparatus applicable to the manufacturing method of the underpants type disposable diaper which is one embodiment of the manufacturing method of this invention. . 図２は、本発明の第１実施形態のパンツ型使い捨ておむつを模式的に示す斜視図である。FIG. 2 is a perspective view schematically showing a pants-type disposable diaper according to the first embodiment of the present invention. 図３は、図２のＩ－Ｉ線断面を模式的に示す断面図である。FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 図４は、図２に示すおむつの展開且つ伸長状態を模式的に示す平面図である。FIG. 4 is a plan view schematically showing a developed and extended state of the diaper shown in FIG. 図５は、図１に示すおむつ連続体の製造工程を模式的に示す斜視図である。FIG. 5 is a perspective view schematically showing a manufacturing process of the diaper continuous body shown in FIG. 1. 図６（ａ）及び図６（ｂ）は、図１に示すレーザー式接合装置におむつ連続体が導入された状態を平面に展開して模式的に示す図であり、図６（ａ）は、押さえ部材の一部を破断して示す上面図、図６（ｂ）は、図６（ａ）のＩＩ－ＩＩ線断面図である。6 (a) and 6 (b) are diagrams schematically showing a state where the diaper continuous body is introduced into the laser-type bonding apparatus shown in FIG. 1 in a plane, and FIG. FIG. 6B is a cross-sectional view taken along the line II-II of FIG. 6A. 図７（ａ）～図７（ｃ）は、それぞれ、図１に示すレーザー式接合装置を用いておむつ連続体（帯状の外装体）を分断するのと同時にサイドシール部（シール縁部）を形成する様子を説明する説明図である。FIGS. 7 (a) to 7 (c) show the side seal portion (seal edge) at the same time that the continuous diaper (strip-shaped exterior body) is cut using the laser type bonding apparatus shown in FIG. It is explanatory drawing explaining a mode that it forms. 図８は、図１に示すレーザー式接合装置を用いたパンツ型使い捨ておむつの製造方法の他の例の図７（ｃ）相当図である。FIG. 8 is a view corresponding to FIG. 7C of another example of a method for manufacturing a pants-type disposable diaper using the laser-type bonding apparatus shown in FIG. 図９（ａ）及び図９（ｂ）は、それぞれ、図３に示すおむつのウエスト開口部を拡げた状態における、片側のサイドシール部（シール縁部）及びその近傍の図３相当図である。9 (a) and 9 (b) are respectively a side seal portion (seal edge portion) on one side and the vicinity thereof in FIG. 3 in a state where the waist opening of the diaper shown in FIG. 3 is expanded. . 図１０は、図２のＩＩＩ－ＩＩＩ線断面を模式的に示す断面図である。10 is a cross-sectional view schematically showing a cross section taken along line III-III in FIG. 図１１は、本発明の製造方法の第１実施態様における、図６（ａ）の一部拡大図に相当する図である。FIG. 11 is a view corresponding to a partially enlarged view of FIG. 6A in the first embodiment of the manufacturing method of the present invention. 図１２は、本発明の製造方法の第２実施態様における、図６（ａ）の一部拡大図に相当する図である。FIG. 12 is a view corresponding to a partially enlarged view of FIG. 6A in the second embodiment of the manufacturing method of the present invention. 図１３は、本発明の製造方法の第３実施態様に用いたレーザー式接合装置におけるレーザー光の光通過部及びその近傍を示す模式断面図である。FIG. 13: is a schematic cross section which shows the light passage part and its vicinity of the laser beam in the laser type joining apparatus used for the 3rd embodiment of the manufacturing method of this invention. 図１４は、図１３に示すレーザー式合装置におけるレーザー光の光通過部及びその近傍を、おむつ連続体（帯状の外装体）が配される円筒ロールの外面側から見た状態を示す図である。FIG. 14 is a view showing a state in which the light passing portion of the laser beam and the vicinity thereof in the laser type apparatus shown in FIG. 13 are viewed from the outer surface side of the cylindrical roll on which the diaper continuous body (band-shaped exterior body) is arranged. is there. 図１５（ａ）～図１５（ｃ）は、本発明のパンツ型着用物品の他の実施形態を示す断面図であり、それぞれ図１０に相当する図である。15 (a) to 15 (c) are cross-sectional views showing other embodiments of the pant-type wearing article of the present invention, each corresponding to FIG.
発明の詳細な説明Detailed Description of the Invention
　本発明は、柔軟性又は肌触りに優れたサイドシール部を有するとともに、サイドシール部の引き裂き易さにも優れているパンツ型着用物品及びその製造方法に関する。 The present invention relates to a pants-type wearing article that has a side seal portion that is excellent in flexibility or touch and is also excellent in tearing of the side seal portion, and a method for manufacturing the same.
　本発明の主たる特長の１つは、着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型着用物品において、そのサイドシール部が、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を形成してなる場合に、そのシール縁部に、該シール縁部を形成する部位に存するシートの積層枚数の差に起因する接合強度の差が生じないように工夫（以下、融着強度均一化手段ともいう）した点にある。
　この融着強度均一化手段の採用は、パンツ型着用物品の製造工程において、前身頃側と後身頃側とを重ねた状態の帯状の外装体における所定箇所に、例えばレーザー光を照射する等して、前記外装体を個々の着用物品用の長さに分断するのと同時に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着して、一対のサイドシール部を形成する場合に特に有用である。 One of the main features of the present invention includes an exterior body that forms an outer surface of a worn article, and a pair of side seals in which both side edges of the exterior body in the front body and both side edges of the exterior body in the back body are joined. A pant-type wearing article in which a waist opening and a pair of leg openings are formed, the side seal part is the edge of the exterior body in the front body and the edge of the exterior body in the back body is the side seal In the case where a seal edge joined by a continuous linear fusion part extending in the longitudinal direction of the part is formed, the number of sheets stacked in the part where the seal edge is formed is the seal edge. The difference is that a difference in bonding strength caused by the difference does not occur (hereinafter also referred to as a means for equalizing fusion strength).
The use of this means for uniformizing the fusion strength is, for example, irradiating a predetermined portion of the belt-shaped exterior body in a state where the front body side and the back body side are overlapped with each other in the manufacturing process of the pant-type wearing article, for example. Then, at the same time as dividing the exterior body into lengths for individual wearing articles, the cut edges of the laminated exterior body produced by the separation are fused together to form a pair of side seal portions. It is particularly useful in cases.
　以下、本発明のパンツ型着用物品の第１実施形態及びその好ましい製造方法である本発明の製造方法の第１実施態様について説明する。 Hereinafter, the first embodiment of the pants-type wearing article of the present invention and the first embodiment of the manufacturing method of the present invention which is a preferable manufacturing method thereof will be described.
　図１には、本発明の製造方法の第１実施態様であるパンツ型使い捨ておむつの製造方法に適用可能な、レーザー式接合装置を用いたパンツ型使い捨ておむつの製造方法の概略が示されている。パンツ型着用物品の第１実施形態のパンツ型使い捨ておむつ１（以下「おむつ１」ともいう）は、このレーザー式接合装置又はそれに一部の改良を施したものを用いて製造することができる。
　第１実施形態のおむつ１は、図２～図４に示すように、吸収性本体２と、着用物品の外面を形成する外装体３とを備え、前身頃Ｆ（腹側部１Ａ）における外装体３の縦方向Ｘに沿う左右両側縁部Ａ１，Ａ１と後身頃Ｒ（背側部１Ｂ）における外装体３の縦方向Ｘに沿う左右両側縁部Ｂ１，Ｂ１とが接合されて一対のサイドシール部４，４、ウエスト開口部８及び一対のレッグ開口部９，９が形成されているパンツ型使い捨ておむつである。外装体３は、吸収性本体２の非肌当接面側に位置して該吸収性本体２を固定している。また、おむつ１における一対のサイドシール部４，４は、それぞれ、前身頃Ｆにおける外装体３の縁部と後身頃Ｒにおける外装体３の縁部が、サイドシール部４の長手方向に延在する連続線状の融着部４０で結合したシール縁部４１を形成してなる。 FIG. 1 shows an outline of a manufacturing method of a pants-type disposable diaper using a laser-type joining device, which can be applied to the manufacturing method of a pants-type disposable diaper that is the first embodiment of the manufacturing method of the present invention. . The pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) of the first embodiment of the pants-type wearing article can be manufactured using this laser-type joining device or a part of which is improved.
The diaper 1 of 1st Embodiment is provided with the absorptive main body 2 and the exterior body 3 which forms the outer surface of a wearing article as shown in FIGS. 2-4, The exterior in front body F (abdominal side part 1A) The left and right side edges A1, A1 along the vertical direction X of the body 3 and the left and right side edges B1, B1 along the vertical direction X of the exterior body 3 in the back body R (back side part 1B) are joined together to form a pair of sides. A pants-type disposable diaper in which seal portions 4 and 4, a waist opening 8 and a pair of leg openings 9 and 9 are formed. The exterior body 3 is positioned on the non-skin contact surface side of the absorbent main body 2 and fixes the absorbent main body 2. In addition, the pair of side seal portions 4, 4 in the diaper 1 extends in the longitudinal direction of the side seal portion 4, with the edge of the exterior body 3 in the front body F and the edge of the exterior body 3 in the back body R, respectively. The sealing edge part 41 couple | bonded by the continuous linear fusion part 40 which forms is formed.
　おむつ１は、図４に示す如き展開且つ伸長状態の平面視において、着用者の前後方向に相当する縦方向Ｘとこれに直交する横方向Ｙとを有している。おむつ１は、着用時に股下部に配される股下部１Ｃ並びにその縦方向Ｘの前後に位置する腹側部１Ａ及び背側部１Ｂに区分することができる。股下部１Ｃにおける外装体３は、その縦方向Ｘに沿う左右両側縁部にレッグ開口部９，９形成用の凹欠部が形成されている。また、おむつ１は、図４に示すように、おむつ１を縦方向Ｘに二分する仮想中心線ＣＬを境にして、前身頃Ｆと後身頃Ｒとに区分することができる。 The diaper 1 has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the wearer's front-rear direction in a developed and extended plan view as shown in FIG. The diaper 1 can be divided into a crotch part 1C arranged at the crotch part at the time of wearing, and an abdominal side part 1A and a back side part 1B located in the longitudinal direction X. The exterior body 3 in the crotch part 1 </ b> C is formed with recesses for forming leg openings 9, 9 at the left and right side edges along the vertical direction X. As shown in FIG. 4, the diaper 1 can be divided into a front body F and a back body R with a virtual center line CL that bisects the diaper 1 in the vertical direction X as a boundary.
　尚、本明細書において、肌当接面は、パンツ型着用物品又はその構成部材（例えば吸収性本体）における、着用時に着用者の肌側に向けられる面であり、非肌当接面は、パンツ型着用物品又はその構成部材における、着用時に着用者の肌側とは反対側（着衣側）に向けられる面である。おむつ１において、縦方向Ｘは、使い捨ておむつ又はその構成部材である吸収性本体２の長辺に沿う方向（長手方向）に一致し、横方向Ｙは、使い捨ておむつ又はその構成部材である吸収性本体２の幅方向に一致する。 In addition, in this specification, a skin contact surface is a surface directed to a wearer's skin side at the time of wearing in a pants type wearing article or its constituent member (for example, an absorptive main part), and a non-skin contact surface is In the pants-type wearing article or its constituent members, it is a surface directed to the side opposite to the wearer's skin side (clothing side) when worn. In the diaper 1, the vertical direction X corresponds to the direction (longitudinal direction) along the long side of the absorbent main body 2 which is a disposable diaper or its constituent member, and the horizontal direction Y is the absorbent which is a disposable diaper or its constituent member. It coincides with the width direction of the main body 2.
　吸収性本体２は、図４に示すように、一方向（縦方向Ｘ）が相対的に長い縦長の形状を有しており、肌当接面を形成する表面シート（図示せず）と、非肌当接面を形成する裏面シート（図示せず）と、これら両シート間に介在配置された液保持性の吸収体（図示せず）とを具備し、該吸収体は、縦方向Ｘと同方向に長い形状を有している。吸収性本体２は、その長手方向を、展開且つ伸長状態におけるおむつ１の縦方向Ｘに一致させて、外装体３の中央部に公知の接合手段（接着剤等）により接合されている。ここで、展開且つ伸長状態とは、サイドシール部を引き剥がして、おむつを展開状態とし、その展開状態のおむつを、各部の弾性部材を伸長させて、設計寸法（弾性部材の影響を一切排除した状態で平面状に広げたときの寸法と同じ）となるまで拡げた状態をいう。 As shown in FIG. 4, the absorbent main body 2 has a vertically long shape in one direction (longitudinal direction X), and a surface sheet (not shown) that forms a skin contact surface; A back sheet (not shown) that forms a non-skin contact surface, and a liquid-retaining absorbent (not shown) interposed between the two sheets. And has a long shape in the same direction. The absorbent main body 2 is joined to a central portion of the outer package 3 by a known joining means (adhesive or the like) so that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1 in the unfolded and extended state. Here, the expanded and extended state means that the side seal portion is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded in the expanded diaper, and the design dimensions (the influence of the elastic member is eliminated at all). In this state, it is expanded until it becomes the same size as when expanded in a flat shape.
　外装体３は、図２～図４に示すように、おむつ１の外面（外装体３の非肌当接面）を形成する外層シート３１と、該外層シート３１の内面側に配され、おむつ１の内面（外装体３の肌当接面）を形成する内層シート３２と、両シート３１，３２間に接着剤により固定された複数本の糸状又は帯状の弾性部材５，６，７とを含んで構成されている。両シート３１，３２間は、所定部位において接着剤又はヒートシール等（図示せず）によって接合されている。 As shown in FIGS. 2 to 4, the outer package 3 is arranged on the outer layer sheet 31 that forms the outer surface of the diaper 1 (non-skin contact surface of the outer package 3), and on the inner surface side of the outer layer sheet 31. An inner layer sheet 32 that forms the inner surface of 1 (skin contact surface of the exterior body 3), and a plurality of thread-like or belt-like elastic members 5, 6, and 7 fixed between the sheets 31 and 32 with an adhesive. It is configured to include. The two sheets 31 and 32 are joined to each other at a predetermined site by an adhesive or heat seal (not shown).
　外装体３（外層シート３１、内層シート３２）は、樹脂材を含み、該樹脂材を主成分として形成されている。外装体３（外層シート３１、内層シート３２）の一例として、樹脂材としてポリエチレン、ポリエチレンテレフタレート、ポリプロピレン等の熱融着性の合成樹脂を含み、不織布、フィルム、不織布とフィルムとのラミネートシート等からなるものが挙げられる。不織布としては、エアースルー不織布、ヒートロール不織布、スパンレース不織布、スパンボンド不織布、メルトブローン不織布等が挙げられる。 The exterior body 3 (the outer layer sheet 31 and the inner layer sheet 32) includes a resin material and is formed using the resin material as a main component. As an example of the outer package 3 (the outer layer sheet 31 and the inner layer sheet 32), the resin material includes a heat-sealable synthetic resin such as polyethylene, polyethylene terephthalate, and polypropylene. The thing which becomes. Examples of the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.
　本発明の製造方法の第１実施態様であるおむつ１の製造方法は、前身頃側と後身頃側とを重ねた状態の帯状の外装体３におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、加圧状態にあるサイドシール部の形成予定部位に、外装体３の搬送方向Ａと交差する方向に延在する光通過部２７を介してレーザー光を照射することにより、該外装体３を分断すると共に、その分断によって生じた、積層状態の外装体の切断縁部どうしを融着させてサイドシール部４を形成するサイドシール部形成工程とを具備している。また、重合加圧工程の前に、帯状の外装体３（外層シート３１、内層シート３２）に吸収性本体２を固定する本体固定工程を具備している。 The manufacturing method of the diaper 1 which is the 1st embodiment of the manufacturing method of this invention makes the formation plan site | part of the side seal part in the strip | belt-shaped exterior body 3 of the state which accumulated the front body side and the back body side into a pressurized state. By irradiating a laser beam through a light passing portion 27 extending in a direction intersecting the transport direction A of the outer package 3 to the formation pressure site of the polymerization pressure step and the side seal portion in a pressurized state And a side seal part forming step of forming the side seal part 4 by fusing the cut edges of the laminated outer case produced by the division, and cutting the outer package 3. Moreover, the main body fixing process which fixes the absorptive main body 2 to the strip | belt-shaped exterior body 3 (the outer layer sheet | seat 31, the inner layer sheet | seat 32) is comprised before the superposition | polymerization pressurization process.
　より具体的には、おむつ１の製造方法においては、図５に示すように、前記重合加圧工程において、帯状の外装体３（外層シート３１、内層シート３２）をその幅方向に折り畳むことにより、吸収性本体２が固定された帯状の外装体３の前身頃側と後身頃側とを重ね合わせ、それによって、「サイドシール部が形成されていないパンツ型使い捨ておむつの前駆体が一方向に連なってなる、おむつ連続体１０」を製造する。そして、前記サイドシール部形成工程において、このおむつ連続体１０における帯状の外装体３を、図１に示すように、レーザー光３０の照射により、個々に分断（溶断）するのと同時に、その分断によって生じた、積層状態の複数枚の外装体３（外層シート３１、内層シート３２）の切断縁部どうしを融着して、一対のサイドシール部４，４を有する外装体３を具備するパンツ型使い捨ておむつ１を連続的に製造する。 More specifically, in the manufacturing method of the diaper 1, as shown in FIG. 5, in the polymerization pressurizing step, the belt-shaped outer package 3 (outer layer sheet 31, inner layer sheet 32) is folded in the width direction. The front body side and the back body side of the strip-shaped exterior body 3 to which the absorbent main body 2 is fixed are overlapped with each other, whereby “a precursor of a pants-type disposable diaper in which a side seal portion is not formed is unidirectional. A continuous diaper 10 "is produced. And in the said side seal | sticker part formation process, as shown in FIG. 1, the strip | belt-shaped exterior body 3 in this diaper continuous body 10 is parted (melting | fusing) separately by irradiation of the laser beam 30, and the parting is carried out simultaneously. The pants comprising the exterior body 3 having a pair of side seal portions 4 and 4 by fusing the cut edges of the plurality of exterior bodies 3 (the outer layer sheet 31 and the inner layer sheet 32) in a laminated state generated by The mold disposable diaper 1 is continuously manufactured.
　より詳細に説明すると、先ず、図５に示すように、原反ロール（図示せず）から連続的に供給される帯状の外層シート３１と、原反ロール（図示せず）から連続的に供給される帯状の内層シート３２の間に、ウェストギャザーを形成するウエスト部弾性部材５、胴回りギャザーを形成する胴回り部弾性部材６及びレッグギャザーを形成するレッグ部弾性部材７を、所定の伸長率に伸長させた伸長状態で各々複数本配する。このとき、レッグ部弾性部材７は、シートの流れ方向とは直交して往復運動する公知の揺動ガイド（図示せず）を介して、所定の脚周りパターンを形成しながら配される。また、帯状の外層シート３１及び帯状の内層シート３２には、それらを重ね合わせる前に、両シート３１，３２の何れか一方又は双方の対向する面の所定部位に、接着剤塗工機（図示せず）によりホットメルト型接着剤を塗工する。尚、ウエスト部弾性部材５、胴回り部弾性部材６等の弾性部材が、両シート３１，３２における、レーザー光の照射によって分断される部分（サイドシール部４の形成予定部分，図６（ａ）及び図６（ｂ）中符号１０Ｃで示す分断予定部分）を跨ぐように伸長状態で配されている場合、その分断後の該弾性部材の大幅な縮みや該弾性部材の抜け等の不都合を回避するために、該部分及びその近傍に接着剤を塗工しておくことが好ましい。ウエスト部弾性部材５及び胴回り部弾性部材６には、両シート３１，３２間に配される前に、接着剤塗工機（図示せず）によりホットメルト型接着剤を間欠的に塗工しても良い。 More specifically, first, as shown in FIG. 5, a belt-like outer layer sheet 31 continuously supplied from a raw fabric roll (not shown) and continuously supplied from a raw fabric roll (not shown). Between the belt-like inner layer sheet 32 to be formed, the waist elastic member 5 forming the waist gather, the waist elastic member 6 forming the waist gather, and the leg elastic member 7 forming the leg gather have a predetermined elongation rate. A plurality of each are arranged in the stretched state. At this time, the leg elastic member 7 is arranged while forming a predetermined leg-circumferential pattern via a known swing guide (not shown) that reciprocates perpendicular to the sheet flow direction. Further, before the belt-like outer layer sheet 31 and the belt-like inner layer sheet 32 are overlapped, an adhesive coating machine (see FIG. (Not shown) to apply hot melt adhesive. It should be noted that the elastic members such as the waist elastic member 5 and the waistline elastic member 6 are divided by the laser light irradiation in the sheets 31 and 32 (the portion where the side seal portion 4 is to be formed, FIG. 6A). And when it is arranged in an extended state so as to straddle the part to be divided indicated by reference numeral 10C in FIG. 6 (b), avoids inconveniences such as significant shrinkage of the elastic member and disconnection of the elastic member after the division. Therefore, it is preferable to apply an adhesive to the portion and the vicinity thereof. A hot melt adhesive is intermittently applied to the waist elastic member 5 and the waist elastic member 6 by an adhesive application machine (not shown) before being arranged between the sheets 31 and 32. May be.
　そして、図５に示すように、一対のニップロール１１，１１の間に、ウエスト部弾性部材５、胴回り部弾性部材６及びレッグ部弾性部材７を伸長状態で挟み込んだ帯状の外層シート３１及び帯状の内層シート３２を送り込んで加圧することにより、帯状シート３１，３２間に複数本の弾性部材５，６，７が伸長状態で配された帯状の外装体３を形成する。
　この外装体３の形成工程においては、隣り合う２本の胴回り部弾性部材６，６間において帯状の外層シート３１と帯状の内層シート３２とを接合する複数の接合部（図示せず）を、凸ロールとこれに対応するアンビルロール等の接合手段（図示せず）を用いて形成することも好ましい。
　その後、必要に応じて、弾性部材プレカット手段（図示せず）を用いて、後述する吸収性本体２を配する位置に対応させて、複数本の胴回り部弾性部材６及び複数本のレッグ部弾性部材７を押圧して、収縮機能が発現されないように個々複数個に分断する。前記弾性部材プレカット手段としては、例えば、特開２００２－２５３６０５号公報に記載の複合伸縮部材の製造方法に用いる弾性部材分断部等が挙げられる。 And as shown in FIG. 5, between the pair of nip rolls 11, 11, a belt-shaped outer layer sheet 31 and a belt-shaped outer layer sheet 5 in which a waist elastic member 5, a waistline elastic member 6 and a leg elastic member 7 are sandwiched in an expanded state. By feeding and pressurizing the inner layer sheet 32, the band-shaped exterior body 3 in which a plurality of elastic members 5, 6, 7 are arranged in an expanded state between the band-shaped sheets 31, 32 is formed.
In the formation process of the exterior body 3, a plurality of joint portions (not shown) for joining the belt-like outer layer sheet 31 and the belt-like inner layer sheet 32 between the two adjacent waistline elastic members 6 and 6, It is also preferable to use a convex roll and a corresponding joining means (not shown) such as an anvil roll.
Thereafter, if necessary, a plurality of waistline elastic members 6 and a plurality of leg portion elasticities are made by using elastic member precut means (not shown) so as to correspond to positions where the absorbent main body 2 described later is disposed. The member 7 is pressed and divided into a plurality of pieces so that the contraction function is not expressed. Examples of the elastic member precut means include an elastic member dividing portion used in the method for manufacturing a composite elastic member described in JP-A-2002-253605.
　次いで、図５に示すように、別工程で製造された吸収性本体２に予めホットメルト接着剤等の接着剤を塗工（図示せず）し、該吸収性本体２を９０度回転させて、帯状の外装体３を構成する内層シート３２上に間欠的に供給して固定する。尚、吸収性本体固定用の接着剤は、吸収性本体２ではなく、内層シート３２における吸収性本体２の配置予定位置に予め塗工しても良い。 Next, as shown in FIG. 5, an adhesive such as a hot melt adhesive is applied in advance to the absorbent main body 2 manufactured in a separate process (not shown), and the absorbent main body 2 is rotated by 90 degrees. Then, it is intermittently supplied and fixed on the inner layer sheet 32 constituting the strip-shaped outer package 3. The adhesive for fixing the absorbent main body may be preliminarily applied not to the absorbent main body 2 but to the position where the absorbent main body 2 is arranged in the inner layer sheet 32.
　そして、図５に示すように、吸収性本体２が配置された帯状の外装体３におけるレッグ部弾性部材７で環状に囲まれた環状部の内側にレッグホールＬＯ’を形成する。このレッグホール形成工程は、ロータリーカッター、レーザーカッター等の従来からこの種の物品の製造方法における手法と同様の手法を用いて実施することができる。尚、図示の態様においては、帯状の外装体３に吸収性本体２を配置した後にレッグホールを形成しているが、吸収性本体２の配置前にレッグホールを形成しても良い。 And as shown in FIG. 5, leg hole LO 'is formed inside the annular part enclosed by the leg part elastic member 7 in the strip | belt-shaped exterior body 3 in which the absorptive main body 2 is arrange | positioned. This leg hole forming step can be carried out by using a technique similar to that in a conventional method for manufacturing this type of article, such as a rotary cutter and a laser cutter. In the illustrated embodiment, the leg hole is formed after the absorbent main body 2 is arranged on the belt-shaped outer package 3, but the leg hole may be formed before the absorbent main body 2 is arranged.
　次いで、帯状の外装体３をその幅方向（外装体３の搬送方向と直交する方向）に折り畳む。より具体的には、図５に示すように、帯状の外装体３の搬送方向に沿う両側部３ａ，３ａを、吸収性本体２の長手方向両端部を覆うように折り返して吸収性本体２の長手方向両端部を固定した後、外装体３を吸収性本体２と共にその幅方向に２つ折りする（重合加圧工程における重合工程）。こうして、おむつ連続体１０が得られる。 Next, the strip-shaped exterior body 3 is folded in the width direction (a direction perpendicular to the conveying direction of the exterior body 3). More specifically, as shown in FIG. 5, both side portions 3 a, 3 a along the transport direction of the strip-shaped exterior body 3 are folded back so as to cover both ends in the longitudinal direction of the absorbent main body 2. After fixing both ends in the longitudinal direction, the outer package 3 is folded in the width direction together with the absorbent main body 2 (polymerization step in the polymerization pressure step). In this way, the diaper continuous body 10 is obtained.
　次いで、こうして製造されたおむつ連続体１０に対して、図１に示すように、レーザー式接合装置２０を用いてレーザー光を照射して一対のサイドシール部４，４を形成し（サイドシール部形成工程）、一対の該サイドシール部４を有する外装体３を具備するパンツ型使い捨ておむつ１を連続的に製造する。 Next, as shown in FIG. 1, the diaper continuous body 10 thus manufactured is irradiated with laser light using a laser bonding apparatus 20 to form a pair of side seal portions 4 and 4 (side seal portion). Forming step), a pants-type disposable diaper 1 having an exterior body 3 having a pair of side seal portions 4 is continuously manufactured.
　レーザー式接合装置２０について説明すると、レーザー式接合装置２０は、図１に示すように、矢印Ａ方向に回転駆動される中空の円筒ロール２３と、円筒ロール２３の中空部に配され、円筒ロール２３の周面部を形成する円筒状（環状）の支持部材２１に向けてレーザー光３０を照射する照射ヘッド３５と、無端状の加圧ベルト２４（押さえ部材）を備えたベルト式加圧装置２６とを備えている。
　レーザー式接合装置２０は、環状の支持部材２１の外周面（円筒ロール２３の周面部）に巻き掛ける加圧ベルト２４の張力を増減調整できる張力調整機構（図示せず）を備え、該張力の調整により、支持部材２１と加圧ベルト２４とによって、おむつ連続体１０（シート積層体）に加える圧力を適宜調整することができる。 The laser type bonding apparatus 20 will be described. The laser type bonding apparatus 20 is arranged in a hollow cylindrical roll 23 that is rotationally driven in the direction of arrow A and a hollow portion of the cylindrical roll 23 as shown in FIG. A belt-type pressure device 26 including an irradiation head 35 that irradiates a laser beam 30 toward a cylindrical (annular) support member 21 that forms a peripheral surface portion 23, and an endless pressure belt 24 (pressing member). And.
The laser-type joining device 20 includes a tension adjusting mechanism (not shown) that can adjust the tension of the pressure belt 24 wound around the outer peripheral surface of the annular support member 21 (the peripheral surface portion of the cylindrical roll 23). By adjustment, the pressure applied to the diaper continuous body 10 (sheet laminated body) can be appropriately adjusted by the support member 21 and the pressure belt 24.
　支持部材２１は、円筒ロール２３の周面部（被加工物との当接部）を形成しており、円筒ロール２３の回転軸方向両端部を形成する一対の環状の枠体２２，２２間に挟持固定されている。支持部材２１は、鉄、アルミニウム、ステンレス鋼、銅等の金属材料又はセラミックス等の耐熱性を有する材料からなる。 The support member 21 forms a peripheral surface portion (contact portion with the workpiece) of the cylindrical roll 23, and is between a pair of annular frames 22, 22 that form both ends of the cylindrical roll 23 in the rotation axis direction. It is pinched and fixed. The support member 21 is made of a metal material such as iron, aluminum, stainless steel, or copper, or a material having heat resistance such as ceramics.
　支持部材２１は、レーザー光が通過可能な光通過部２７を有している。支持部材２１は、図１、図６（ａ）及び図６（ｂ）に示すように、光通過部として、該支持部材２１を厚み方向に貫通するスリット状の開口部２７を有している。開口部２７は、平面視して矩形形状を有し、その長手方向を、おむつ連続体１０（帯状の外装体３）の搬送方向Ａと交差する方向、より具体的には、円筒ロール２３の回転軸の軸長方向と平行な方向（図６（ａ）中に符号Ｘで示す方向）に一致させて、円筒状の支持部材２１の周方向に所定間隔を置いて複数形成されている。支持部材２１は、開口部２７ではレーザー光を通過させる一方、開口部２７以外の部分ではレーザー光を通過（透過）させない。支持部材２１に開口部２７を形成する方法としては、１）環状の枠体２２の周長と同じ長さの単一の環状部材からなる支持部材２１の所定箇所にエッチング、パンチング、レーザー加工等により開口部２７を穿設する方法、２）支持部材２１として、単一の環状部材に代えて、湾曲した矩形形状の部材を複数用い、それら複数の部材を、一対の枠体２２，２２間に、該枠体２２の周方向に所定間隔を置いて配置する方法が挙げられる。前記２）の方法では、隣接する２つの部材の間隔が、スリット状の開口部２７となる。本基本技術及び後述する本発明の製造方法の第１及び第２実施態様においては、前記２）の方法を用いている。 The support member 21 has a light passage portion 27 through which laser light can pass. As shown in FIG. 1, FIG. 6A and FIG. 6B, the support member 21 has a slit-like opening 27 that penetrates the support member 21 in the thickness direction as a light passage portion. . The opening 27 has a rectangular shape in plan view, and the longitudinal direction of the opening 27 intersects with the conveyance direction A of the diaper continuous body 10 (band-shaped exterior body 3). A plurality of cylinders are formed at predetermined intervals in the circumferential direction of the cylindrical support member 21 so as to coincide with the direction parallel to the axial length direction of the rotation shaft (the direction indicated by the symbol X in FIG. 6A). The support member 21 allows the laser light to pass through the opening 27, but does not allow the laser light to pass (transmit) at portions other than the opening 27. As a method of forming the opening 27 in the support member 21, 1) etching, punching, laser processing, or the like at a predetermined position of the support member 21 made of a single annular member having the same length as the circumferential length of the annular frame 22. 2) The support member 21 is replaced with a single annular member, and a plurality of curved rectangular members are used as the support member 21, and the plurality of members are connected between the pair of frames 22, 22. In addition, a method of arranging the frame body 22 at a predetermined interval in the circumferential direction may be mentioned. In the method 2) described above, the interval between two adjacent members forms a slit-shaped opening 27. In the first and second embodiments of the basic technique and the manufacturing method of the present invention described later, the method 2) is used.
　尚、図６（ａ）及び図６（ｂ）では、説明容易の観点から、支持部材２１及び加圧ベルト２４（押さえ部材）並びにこれらに挟まれたおむつ連続体１０（帯状の外装体）が、図６（ａ）及び図６（ｂ）中、左側から右側に向かって水平移動しているかのように記載しているが、実際には、これら各部材は、円筒ロール２３の円筒状の周面部に対応した湾曲状態で回転移動している。 6 (a) and 6 (b), from the viewpoint of easy explanation, the support member 21, the pressure belt 24 (pressing member), and the diaper continuous body 10 (band-shaped exterior body) sandwiched between them are shown. 6 (a) and 6 (b), it is described as if it is moving horizontally from the left side to the right side. However, in reality, each of these members is the cylindrical shape of the cylindrical roll 23. It is rotationally moved in a curved state corresponding to the peripheral surface portion.
　レーザー式接合装置２０（複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造装置）においては、レーザー光が通過可能な光通過部が、支持部材２１を厚み方向に貫通する（スリット状の）開口部２７からなるため、おむつ連続体１０（シート積層体）における開口部２７と重なる部分（分断予定部分１０Ｃ）は、加圧ベルト２４が当接するだけで、支持部材２１と加圧ベルト２４（押さえ部材）とで挟まれない。従って厳密に言えば、分断予定部分１０Ｃには、両部材２１，２４で挟持されることにより発生する加圧力は発生しない。しかし、開口部２７と重なる分断予定部分１０Ｃは、それ自体は両部材２１，２４で挟持されなくとも、その近傍、即ち、おむつ連続体１０における開口部２７の近傍（開口縁部）と重なる部分は両部材２１，２４で挟持されるため、レーザー光の照射前後で動かず、従って、レーザー光の照射によるおむつ連続体１０の分断によって生じた切断縁部は動かない。つまり、おむつ連続体１０の分断予定部分１０Ｃ（シート積層体における開口部２７と重なる部分）は、両部材２１，２４での挟持による加圧力により拘束された部分であり、該加圧力が事実上影響する部分である。 In the laser type bonding apparatus 20 (manufacturing apparatus of a sheet fusion body having a seal edge portion fused in a state where the edges of a plurality of sheets are overlapped), a light passage portion through which laser light can pass is a support member. 21 (slit-like) opening 27 that penetrates 21 in the thickness direction, the pressure belt 24 contacts the portion (scheduled portion 10C) that overlaps the opening 27 in the diaper continuous body 10 (sheet laminate). Only the support member 21 and the pressure belt 24 (pressing member) are not sandwiched. Strictly speaking, therefore, the pressing force generated by being sandwiched between the members 21 and 24 is not generated in the parting portion 10C. However, the parting portion 10C that overlaps with the opening 27 itself is not sandwiched between the members 21 and 24, but the vicinity thereof, that is, the portion that overlaps with the vicinity of the opening 27 (opening edge) in the diaper continuous body 10. Is sandwiched between the two members 21 and 24, and therefore does not move before and after the irradiation of the laser beam, and therefore, the cutting edge portion generated by the division of the diaper continuous body 10 by the irradiation of the laser beam does not move. That is, the parting planned portion 10C of the diaper continuous body 10 (portion overlapping the opening 27 in the sheet laminate) is a portion restrained by the pressing force between the members 21 and 24, and the pressing force is practically the same. It is an affected part.
　支持部材２１は、図６（ｂ）に示すように、その外面（被加工物との当接面）に凹部２８を有している。凹部２８は、円筒状の支持部材２１の周方向に所定間隔を置いて複数形成されており、隣接する２つの凹部２８，２８間に位置する領域（凸部）に、スリット状の開口部２７が形成されている。開口部２７は、前記凸部における円筒状の支持部材２１の周方向の中央に形成されている。 As shown in FIG. 6B, the support member 21 has a recess 28 on its outer surface (contact surface with the workpiece). A plurality of recesses 28 are formed at predetermined intervals in the circumferential direction of the cylindrical support member 21, and a slit-shaped opening 27 is formed in a region (convex part) located between two adjacent recesses 28, 28. Is formed. The opening 27 is formed in the center in the circumferential direction of the cylindrical support member 21 in the convex portion.
　このように、支持部材２１の外面に凹部２８が形成されていることにより、おむつ連続体１０（帯状のシート積層体）の厚みが均一でない場合は、該おむつ連続体１０における相対的に厚みの大きい部分（例えば吸収性本体２の配置領域）が凹部２８内に収まるように、該おむつ連続体１０を支持部材２１の外面上に導入することが可能となる。そして、おむつ連続体１０をそのように支持部材２１上に導入すると、図６（ｂ）に示すように、おむつ連続体１０における加圧ベルト２４（押さえ部材）との当接面（他方の面１０ｂ）が略平坦となるため、加圧ベルト２４をおむつ連続体１０に押し付けたときに、おむつ連続体１０における、開口部２７が形成された前記凸部上に位置する部分が、おむつ連続体１０の支持部材２１への所定のテンションでの巻きかけと加圧ベルト２４とによって、所定の圧力でその厚み方向に均一に加圧されるようになる。こうしてレーザー光の照射による分断前から厚み方向に加圧された部分にレーザー光を照射して、該部分を分断することにより、その分断された該部分を構成する複数枚のシートの切断縁部どうしをより確実に融着させることが可能となり、サイドシール部４（シール縁部）の融着強度の一層の向上が図られる。 Thus, when the thickness of the diaper continuous body 10 (band-shaped sheet laminated body) is not uniform by forming the recess 28 on the outer surface of the support member 21, the relative thickness of the diaper continuous body 10 is relatively small. It is possible to introduce the diaper continuous body 10 onto the outer surface of the support member 21 so that a large portion (for example, an arrangement region of the absorbent main body 2) is accommodated in the recess 28. Then, when the diaper continuous body 10 is introduced onto the support member 21 in such a manner, as shown in FIG. 6B, the contact surface (the other surface) of the diaper continuous body 10 with the pressure belt 24 (pressing member). 10b) is substantially flat, and when the pressure belt 24 is pressed against the diaper continuous body 10, the portion of the diaper continuous body 10 located on the convex part where the opening 27 is formed is the diaper continuous body. By the winding of the ten support members 21 with a predetermined tension and the pressure belt 24, the pressure is uniformly applied in the thickness direction with a predetermined pressure. In this way, by cutting the portion that is pressed in the thickness direction from before laser beam irradiation and dividing the portion, the cut edge portion of the plurality of sheets constituting the divided portion It becomes possible to fuse | melt more reliably, and the further improvement of the fusion strength of the side seal part 4 (seal edge part) is achieved.
　ベルト式加圧装置２６は、無端状の加圧ベルト２４（押さえ部材）及び該加圧ベルト２４が架け渡された状態で回転する３本のロール２５ａ，２５ｂ，２５ｃを備えている。ロール２５ａ，２５ｂ，２５ｃは駆動ロールでも良く、加圧ベルト２４に連れ回りする従動ロールでも良い。加圧ベルト２４は、ロール２５ａ，２５ｂ，２５ｃの何れか１以上を駆動ロールとして、又は円筒ロール２３と連れ回りして、円筒ロール２３（支持部材２１）と同速度で移動する。支持部材２１及び加圧ベルト２４は、空冷、水冷等により温度を所定の温度範囲に維持することが好ましい。 The belt-type pressure device 26 includes an endless pressure belt 24 (pressing member) and three rolls 25a, 25b, and 25c that rotate while the pressure belt 24 is stretched. The rolls 25a, 25b, and 25c may be drive rolls or driven rolls that rotate with the pressure belt 24. The pressure belt 24 moves at the same speed as the cylindrical roll 23 (supporting member 21) by using any one or more of the rolls 25a, 25b, and 25c as a driving roll or rotating with the cylindrical roll 23. The support member 21 and the pressure belt 24 are preferably maintained in a predetermined temperature range by air cooling, water cooling, or the like.
　加圧ベルト２４（押さえ部材）としては、加工時に発生する熱に耐えうる耐熱性を有する金属又は樹脂製のベルトを用いることができ、例えば、鉄、アルミニウム、ステンレス鋼等の金属材料からなるものを用いることができる。また、加圧ベルト２４としては、通常、被加工物（帯状の外装体３）に対して照射されるレーザー光の透過性を有しないものが用いられるが、該透過性を有するものを用いることもできる。 As the pressure belt 24 (pressing member), a metal or resin belt having heat resistance capable of withstanding the heat generated during processing can be used, for example, a metal material such as iron, aluminum, stainless steel, or the like. Can be used. In addition, as the pressure belt 24, a belt that does not transmit the laser beam irradiated to the workpiece (strip-shaped outer package 3) is usually used. You can also.
　図１に示すように、中空の円筒ロール２３の中空部には、該円筒ロール２３の周面部を形成する支持部材２１に向けてレーザー光３０を照射する照射ヘッド３５が設けられている。照射ヘッド３５は、レーザー光３０を自在に走査するガルバノスキャナ（モータ軸にミラーが付いた装置）であり、レーザー光３０を円筒ロール２３の回転軸と平行な方向（図６（ａ）中符号Ｘで示す方向）に進退させる機構、レーザー光３０が支持部材２１上のおむつ連続体１０に当たる位置（照射点）を円筒ロール２３の周方向に移動させる機構、及び円筒ロール２３の周面上でレーザー光３０のスポット径を一定にする機構等を備えている。レーザー照射機構は、このような構成を有することによって、レーザー光３０の照射点を、円筒ロール２３の周方向及び該周方向と直交する方向（図６（ａ）中符号Ｘで示す方向。円筒ロール２３の回転軸と平行な方向。）の両方向に任意に移動させることができる。 As shown in FIG. 1, an irradiation head 35 that irradiates a laser beam 30 toward a support member 21 that forms a peripheral surface portion of the cylindrical roll 23 is provided in the hollow portion of the hollow cylindrical roll 23. The irradiation head 35 is a galvano scanner (device having a mirror on the motor shaft) that freely scans the laser light 30, and the laser light 30 is in a direction parallel to the rotation axis of the cylindrical roll 23 (reference numeral in FIG. 6A). On the circumferential surface of the cylindrical roll 23, and a mechanism for moving the position (irradiation point) where the laser beam 30 hits the diaper continuous body 10 on the support member 21 in the circumferential direction. A mechanism for making the spot diameter of the laser beam 30 constant is provided. The laser irradiation mechanism has such a configuration, so that the irradiation point of the laser light 30 is the circumferential direction of the cylindrical roll 23 and a direction orthogonal to the circumferential direction (a direction indicated by a symbol X in FIG. 6A). It can be arbitrarily moved in both directions of a direction parallel to the rotation axis of the roll 23).
　図１に示すように、おむつ連続体１０は、図示しない案内ロール等によって、所定のテンションが掛けられた状態で、矢印Ａ方向に回転駆動される円筒ロール２３の周面部を形成する支持部材２１の外面上に導入され、該支持部材２１に巻き掛けられるようにして該円筒ロール２３の回転によりその周方向に所定距離搬送された後、図示しない導出ロール及びニップロール等によって該支持部材２１から離れる。このように、おむつ連続体１０を、円筒ロール２３の周面部を形成する支持部材２１に所定のテンションで巻き掛け且つ加圧ベルト２４によって圧接するようにして搬送することにより、おむつ連続体１０における支持部材２１と加圧ベルト２４とに挟まれた部分及びその近傍は、レーザー光の照射による分断前からその厚み方向に加圧（圧縮）された状態となる。このため、おむつ連続体１０が不織布を含む場合等に、該おむつ連続体１０をより効率的に圧縮させることができ、結果として、斯かる圧縮中のおむつ連続体１０に対してレーザー光を照射してこれを分断したときに、その分断された部分を構成する複数枚のシート（外装体３）の切断縁部どうしをより確実に融着させることが可能となり、サイドシール部４の融着強度の向上が図られる。 As shown in FIG. 1, the diaper continuous body 10 includes a support member 21 that forms a peripheral surface portion of a cylindrical roll 23 that is rotationally driven in the direction of arrow A in a state where a predetermined tension is applied by a guide roll (not shown). After being transported by a predetermined distance in the circumferential direction by rotation of the cylindrical roll 23 so as to be wound around the support member 21, it is separated from the support member 21 by an unillustrated lead roll, nip roll or the like. . As described above, the diaper continuous body 10 is wound around the support member 21 forming the peripheral surface portion of the cylindrical roll 23 with a predetermined tension and is conveyed so as to be in pressure contact with the pressure belt 24. The portion sandwiched between the support member 21 and the pressure belt 24 and the vicinity thereof are in a state of being pressurized (compressed) in the thickness direction from before being divided by the laser light irradiation. For this reason, when the diaper continuous body 10 contains a nonwoven fabric, the diaper continuous body 10 can be more efficiently compressed, and as a result, the diaper continuous body 10 being compressed is irradiated with laser light. When this is divided, it becomes possible to fuse the cut edges of the plurality of sheets (exterior body 3) constituting the divided portion more reliably, and the side seal portion 4 can be fused. The strength is improved.
　おむつ連続体１０が、支持部材２１上に導入されてからこれを離れるまでの該支持部材２１（円筒ロール２３）の回転角度は、例えば、９０度以上２７０度以下とすることができ、より好ましくは１２０度以上２７０度以下である。また、加圧ベルト２４（押さえ部材）によりおむつ連続体１０を支持部材２１に圧接させる角度（圧接角度）の範囲は、円筒状の支持部材２１（円筒ロール２３）の周方向の全周に亘って圧接させる場合を３６０度とした場合に、９０度以上２７０度以下であることが好ましく、より好ましくは１２０度以上２７０度以下である。 The rotation angle of the support member 21 (cylindrical roll 23) from when the diaper continuous body 10 is introduced onto the support member 21 to when the diaper continuous body 10 leaves the diaper continuous body 10 can be, for example, 90 degrees or more and 270 degrees or less. Is 120 degrees or more and 270 degrees or less. The range of the angle (pressure contact angle) at which the diaper continuous body 10 is pressed against the support member 21 by the pressure belt 24 (pressing member) is the entire circumference of the cylindrical support member 21 (cylindrical roll 23). When the pressure contact is 360 degrees, it is preferably 90 degrees or more and 270 degrees or less, and more preferably 120 degrees or more and 270 degrees or less.
　図１、図６（ａ）及び図６（ｂ）に示す実施形態においては、おむつ連続体１０を連続搬送しつつ、その一方の面１０ａを、円筒ロール２３の周面部を形成し且つレーザー光３０が通過可能なスリット状の開口部２７（光通過部）を有する支持部材２１の外面に当接させ、支持部材２１と加圧ベルト２４（押さえ部材）とによって加圧状態となったおむつ連続体１０（サイドシール部４の形成予定部位）に対して、支持部材２１側から開口部２７を介してレーザー光３０を照射することにより、おむつ連続体１０を分断するのと同時に、その分断によって生じた前記加圧状態にある複数枚のシート（外装体３）の切断縁部どうしを融着させて、サイドシール部４を形成する（サイドシール部形成工程）。 In the embodiment shown in FIG. 1, FIG. 6 (a) and FIG. 6 (b), while continuously conveying the diaper continuous body 10, one surface 10a forms the peripheral surface portion of the cylindrical roll 23 and laser light. A continuous diaper brought into contact with the outer surface of the support member 21 having a slit-like opening 27 (light passage portion) through which 30 can pass and brought into a pressurized state by the support member 21 and the pressure belt 24 (pressing member). By irradiating the body 10 (part where the side seal portion 4 is to be formed) with the laser beam 30 from the support member 21 through the opening 27, the diaper continuous body 10 is divided at the same time. The cut edges of the plurality of sheets (exterior body 3) in the pressurized state are fused together to form the side seal portion 4 (side seal portion forming step).
　図７は、レーザー式接合装置２０を用いておむつ連続体１０（帯状のシート積層体）を分断するのと同時にサイドシール部４（シール縁部）を形成する様子を説明する図であり、図７（ａ）には、おむつ連続体１０のレーザー光３０による分断予定部分１０Ｃ（サイドシール部４の形成予定部位）及びその近傍が模式的に示されている。
　本実施態様におけるおむつ連続体１０の分断予定部分１０Ｃは、図６（ａ）に示すように、おむつ連続体１０の吸収性本体２が配置されていない領域における長手方向（搬送方向Ａ）の中央である。 FIG. 7 is a diagram for explaining how the side seal portion 4 (seal edge) is formed at the same time as the diaper continuous body 10 (band-shaped sheet laminate) is divided using the laser bonding apparatus 20. 7 (a) schematically shows a portion 10C (part where the side seal portion 4 is to be formed) scheduled to be divided by the laser beam 30 of the diaper continuous body 10 and its vicinity.
As shown in FIG. 6 (a), the diaper continuous body 10C in the present embodiment has a center portion in the longitudinal direction (conveying direction A) in the region where the absorbent main body 2 of the diaper continuous body 10 is not disposed. It is.
　本実施形態のおむつ１における外装体３は、図１０に示すように、ウエスト開口部８の開口端部及びその近傍が８枚のシートが重ねられた８層構造部分（合計積層枚数が最も多い高積層部分）３Ａ、それ以外の部分が、４枚のシートが重ねられた４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂとなっている。８層構造部分３Ａは、前身頃Ｆ側の外装体を構成する外層シート３１及び内層シート３２が、ウエスト開口部８の開口端部において折り返されて４層となっている前身頃Ｆ側の４層構造部分と、後身頃Ｒ側の外装体を構成する外層シート３１及び内層シート３２が、ウエスト開口部８の開口端部において折り返されて４層となっている４層構造部分とからなる。他方、４層構造部分３Ｂは、前身頃Ｆ側の外装体を構成する外層シート３１及び内層シート３２からなる２層構造部分と、後身頃Ｒ側の外装体を構成する外層シート３１及び内層シート３２からなる２層構造部分とからなる。おむつ１の幅方向中央部における８層構造部分３Ａは、おむつ連続体１０の製造時に、帯状の外装体３の両側部３ａ，３ａが、吸収性本体２の長手方向両端部を覆うように折り返されている（図４及び図５参照）ことに起因して形成されている。 As shown in FIG. 10, the outer package 3 in the diaper 1 of the present embodiment has an eight-layer structure portion in which eight sheets are stacked on the opening end portion of the waist opening portion 8 and the vicinity thereof (the total number of stacked layers is the largest). The highly laminated portion (3A) and the other portions are the four-layer structure portion (low laminated portion with the smallest total number of laminated layers) 3B in which four sheets are stacked. The 8-layer structure portion 3A is composed of an outer layer sheet 31 and an inner layer sheet 32 that constitute an outer body on the front body F side, and are folded back at the opening end of the waist opening 8 to form four layers. The layer structure portion and the outer layer sheet 31 and the inner layer sheet 32 constituting the outer body on the rear body R side are formed of a four-layer structure portion that is folded at the opening end portion of the waist opening portion 8 to form four layers. On the other hand, the four-layer structure portion 3B includes a two-layer structure portion composed of an outer layer sheet 31 and an inner layer sheet 32 constituting the outer body on the front body F side, and an outer layer sheet 31 and inner layer sheet constituting the outer body on the rear body R side. It consists of a two-layer structure consisting of 32. The eight-layer structure portion 3A in the central portion in the width direction of the diaper 1 is folded back so that both side portions 3a and 3a of the strip-shaped outer package 3 cover both longitudinal ends of the absorbent main body 2 when the diaper continuous body 10 is manufactured. (See FIGS. 4 and 5).
　おむつ１の外装体３が、８層構造部分３Ａと４層構造部分３Ｂとを有することに対応して、おむつ連続体１０（おむつ連続体前身頃側と後身頃側とを重ねた状態の帯状の外装体３）の分断予定部分１０Ｃにも、８枚のシートが重ねられた８層構造部分３Ａと、４枚のシートが重ねられた４層構造部分３Ｂとが形成されている。尚、おむつ連続体１０やその帯状の外装体３の分断予定部分１０Ｃにおける８層構造部分及び４層構造部分のそれぞれにおいては、互いに重なり合うシート３１，３２間に、ウエスト部弾性部材５、胴回り部弾性部材６等の弾性部材が介在配置されているが、図７では、説明容易の観点から、該弾性部材の図示を省略している。分断予定部分１０Ｃに存在する弾性部材は、プレカット等の手段によりサイドシール部形成工程前に切断しても良いし、サイドシール部形成工程におけるレーザー光の照射により切断しても良い。 Corresponding to the outer body 3 of the diaper 1 having an 8-layer structure portion 3A and a 4-layer structure portion 3B, a diaper continuous body 10 (a strip shape in which the front body side and the back body side of the diaper continuous body are stacked) Also in the parting portion 10C of the outer package 3), an eight-layer structure portion 3A in which eight sheets are stacked and a four-layer structure portion 3B in which four sheets are stacked are formed. In each of the eight-layer structure portion and the four-layer structure portion of the diaper continuous body 10 and the segmented portion 10C of the belt-shaped exterior body 3, the waist elastic member 5 and the waistline portion are disposed between the sheets 31 and 32 that overlap each other. Although an elastic member such as the elastic member 6 is interposed, the illustration of the elastic member is omitted in FIG. 7 from the viewpoint of easy explanation. The elastic member present in the parting planned portion 10C may be cut before the side seal portion forming step by means such as pre-cutting, or may be cut by laser light irradiation in the side seal portion forming step.
　以下、主として、４層構造部分について説明するが、特に断らない限り、８層構造部分も４層構造部分と同様に構成されサイドシール部４が形成される。 Hereinafter, the 4-layer structure portion will be mainly described, but unless otherwise specified, the 8-layer structure portion is configured in the same manner as the 4-layer structure portion, and the side seal portion 4 is formed.
　おむつ連続体１０における４層構造の分断予定部分１０Ｃにおいて、おむつ連続体１０の一方の面１０ａ（支持部材２１との当接面）を構成する外層シート３１及び一方の面１０ａを構成するシート以外のシート（内層シート３２）は、何れか一方又は両方が、レーザー光３０を吸収して発熱するシートである。図示の態様においては、分断予定部分１０Ｃを構成する４枚のシート３１，３２の全てが、レーザー光３０を吸収して発熱するシート（不織布）である。また、分断予定部分１０Ｃ及びその近傍における互いに重なり合う外層シート３１及び内層シート３２の２枚のシート間は、レーザー光３０の照射前において、接着剤等により接合されていても良く、全く接合されていなくても良い。 Other than the sheet constituting the outer layer sheet 31 and the one surface 10a constituting the one surface 10a (the contact surface with the support member 21) of the diaper continuum 10 in the planned division portion 10C of the four-layer structure in the diaper continuum 10 One or both of the sheets (inner layer sheet 32) absorb the laser beam 30 and generate heat. In the illustrated embodiment, all of the four sheets 31 and 32 constituting the parting planned portion 10 </ b> C are sheets (nonwoven fabrics) that absorb the laser beam 30 and generate heat. In addition, the two sheets of the outer layer sheet 31 and the inner layer sheet 32 that overlap each other in the vicinity of the portion 10C to be divided may be joined by an adhesive or the like before the irradiation with the laser beam 30, or may be joined at all. It is not necessary.
　おむつ連続体１０は、図７（ｂ）に示すように、一方の面１０ａが支持部材２１に当接し且つ分断予定部分１０Ｃ（サイドシール部４の形成予定部位）がスリット状の開口部２７上に位置するように、矢印Ａ方向に回転する支持部材２１上に導入されると共に、他方の面１０ｂに加圧ベルト２４（押さえ部材）が押し付けられることによって、矢印Ａ方向に搬送されつつ厚み方向に加圧（圧縮）される。そして、斯かる搬送中且つ加圧状態の分断予定部分１０Ｃに対して、支持部材２１側から開口部２７を介してレーザー光３０が照射される。前述したように、レーザー光３０の照射点は、円筒ロール２３の周方向に任意に移動可能に構成されており、開口部２７の該周方向に沿った移動に追従して走査するように設定されているので、該開口部２７上に位置する分断予定部分１０Ｃには、その搬送中にレーザー光３０が一定時間連続的に照射される。 As shown in FIG. 7 (b), the diaper continuous body 10 has one surface 10 a abutting against the support member 21, and a parting planned portion 10 </ b> C (part where the side seal portion 4 is to be formed) is on the slit-shaped opening 27. The pressure belt 24 (pressing member) is pressed against the other surface 10b so that it is conveyed in the direction of the arrow A while being introduced onto the support member 21 that rotates in the direction of the arrow A so as to be positioned in the direction of the thickness A. Pressure (compression). And the laser beam 30 is irradiated through the opening part 27 from the supporting member 21 side with respect to the parting part 10C to be divided in such a conveyance and pressurization state. As described above, the irradiation point of the laser beam 30 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roll 23, and is set to scan following the movement of the opening 27 along the circumferential direction. Therefore, the laser beam 30 is continuously irradiated for a certain period of time to the parting planned portion 10C located on the opening 27 during the conveyance.
　４層構造の分断予定部分１０Ｃにレーザー光３０が照射されると、該分断予定部分１０Ｃに存するシート３１，３２の形成材料（繊維等）は、レーザー光３０の直射による発熱によって気化して消失し、該分断予定部分１０Ｃの近傍に存する該形成材料は、レーザー光３０によって間接的に熱せされて溶融する。その結果、図７（ｃ）に示すように、４層構造の分断予定部分１０Ｃが溶断されて、おむつ連続体１０から１つの枚葉のシート積層体（おむつ前駆体）が切り分けられる形で、該おむつ連続体１０が分断されるのと同時に、その分断によって生じた該枚葉のシート積層体における４枚のシート３１，３２の切断縁部どうし、及び、切り分けられた該おむつ連続体１０における４枚のシート３１，３２の切断縁部どうしが、それぞれ融着する。これらの切断縁部どうしは、それぞれ、その形成前（レーザー光３０の照射によるおむつ連続体１０の分断前）から、支持部材２１と加圧ベルト２４とに挟まれることによって加圧状態（圧縮状態）とされていたものである。図示の態様のおむつの製造方法によれば、このように、一回のレーザー光の照射で、帯状の外装体３の分断と、その分断によって生じた２箇所の加圧状態にある外装体３の切断縁部どうしの融着とを同時に実施するため、２箇所の融着箇所を二回のレーザー光の照射で融着する方法に比べ、おおよそ半分のレーザー出力で融着と分断とを同一工程で実施でき、おむつ１を効率良く製造することができる。 When the laser beam 30 is irradiated to the parting portion 10C having the four-layer structure, the forming materials (fibers, etc.) of the sheets 31 and 32 existing in the parting portion 10C are vaporized by the heat generated by the direct irradiation of the laser light 30 and disappear. The forming material existing in the vicinity of the parting portion 10 </ b> C is indirectly heated by the laser beam 30 and melted. As a result, as shown in FIG.7 (c), the parting plan part 10C of a four-layer structure is melted, and in a form in which a single sheet sheet laminate (diaper precursor) is cut from the diaper continuous body 10, At the same time that the diaper continuum 10 is divided, the cut edges of the four sheets 31 and 32 in the sheet laminate of the single sheets produced by the division, and the diaper continuous 10 separated. The cut edges of the four sheets 31 and 32 are fused together. Each of these cut edges is pressed (compressed) by being sandwiched between the support member 21 and the pressure belt 24 from before the formation (before the diaper continuous body 10 is divided by irradiation with the laser beam 30). ). According to the diaper manufacturing method of the illustrated embodiment, the strip-shaped exterior body 3 is divided by the single laser light irradiation, and the exterior body 3 in the two pressurized states generated by the division is thus obtained. In order to carry out the fusion of the cutting edges at the same time, the fusion and separation are the same with approximately half the laser output compared to the method of fusing the two fusion places with two laser irradiations. It can be carried out in a process, and the diaper 1 can be manufactured efficiently.
　シート３１，３２の切断縁部は、レーザー光３０の照射中及び照射終了直後は、発熱して溶融状態となっているが、レーザー光３０の照射によっておむつ連続体１０から切り分けられた１つの枚葉のおむつ前駆体及び該おむつ連続体１０それぞれの、支持部材２１と加圧ベルト２４とによる加圧状態が保持されたまま、照射終了後からは外気や支持部材２１・加圧ベルト２４への伝熱によって速やかに冷却されて固化し、該切断縁部の形成材料（繊維等）が溶融一体化した融着部４０となる。こうして、融着部４０が形成されることによって、１個のおむつ１における一対のサイドシール部４，４のうちの一方が形成される。尚、必要に応じ、吸引装置、排気装置等の公知の冷却手段を用いてシート３１，３２の切断縁部を強制的に冷却し、融着部４０の形成を促進しても良い。 The cut edges of the sheets 31 and 32 are heated and melted during the irradiation of the laser beam 30 and immediately after the end of the irradiation, but are separated from the diaper continuous body 10 by the irradiation of the laser beam 30. Each of the leaf diaper precursor and the diaper continuum 10 is maintained in the pressurized state by the support member 21 and the pressure belt 24, and after the irradiation is completed, the air is applied to the outside air, the support member 21 and the pressure belt 24. The material is quickly cooled and solidified by heat transfer to form the fused portion 40 in which the forming material (fibers, etc.) of the cut edge is fused and integrated. Thus, by forming the fused part 40, one of the pair of side seal parts 4, 4 in one diaper 1 is formed. If necessary, the cutting edge portions of the sheets 31 and 32 may be forcibly cooled by using known cooling means such as a suction device and an exhaust device to promote the formation of the fused portion 40.
　こうして１箇所の分断予定部分１０Ｃ（サイドシール部４の形成予定部位）が分断されると、レーザー光３０は、その照射点が搬送方向Ａとは逆方向に隣接する別の開口部２７に当たるように移動され、該別の開口部２７を介してその上に位置する別の分断予定部分１０Ｃに照射される。これにより、別の分断予定部分１０Ｃが前記と同様に分断・融着され、先に形成されたサイドシール部４と対をなす他方のサイドシール部４（融着部４０）が形成される。以後、同様の操作を繰り返すことにより、一対のサイドシール部４，４を有する外装体３を具備するパンツ型使い捨ておむつ１が連続的に製造される。 When one portion 10C (scheduled portion where the side seal portion 4 is to be formed) is divided in this way, the laser beam 30 seems to hit another opening 27 adjacent to the irradiation direction in the direction opposite to the conveyance direction A. And is irradiated to another parting planned portion 10C located thereabove through the other opening 27. As a result, another part 10C to be divided is divided and fused in the same manner as described above, and the other side seal part 4 (fused part 40) that forms a pair with the previously formed side seal part 4 is formed. Thereafter, by repeating the same operation, the pants-type disposable diaper 1 including the exterior body 3 having the pair of side seal portions 4 and 4 is continuously manufactured.
　尚、レーザー光３０が照射されるスリット状の開口部２７の幅Ｗ（図７（ｂ）参照。開口部２７の、円筒ロール２３の周方向に沿った長さ。）に比して、おむつ連続体１０（帯状のシート積層体）におけるレーザー光３０のスポット（レーザー光３０が照射されている部分）の直径φが小さい場合（φ／Ｗが１未満の場合）には、図８に示すように、レーザー光３０の照射によって形成された一対のサイドシール部４，４（融着部４０，４０）は、おむつ連続体１０における開口部２７と重なる部位（平面視において、スリット状の開口部２７の、搬送方向Ａと直交する方向に沿う一対の開口縁部に挟まれた部位）に位置し得る。即ち、おむつ連続体１０において、支持部材２１と加圧ベルト２４（押さえ部材）とで挟まれていない部位であっても、開口部２７の近傍（開口縁部）、即ち前述したように、両部材２１，２４での挟持による加圧力が事実上影響する部位であれば、融着部４０は形成され得る。 Note that the diaper is larger than the width W of the slit-shaped opening 27 irradiated with the laser beam 30 (see FIG. 7B. The length of the opening 27 along the circumferential direction of the cylindrical roll 23). When the diameter φ of the spot of the laser beam 30 (the portion irradiated with the laser beam 30) in the continuum 10 (band-shaped sheet laminate) is small (when φ / W is less than 1), it is shown in FIG. As described above, the pair of side seal portions 4, 4 (fused portions 40, 40) formed by the irradiation of the laser beam 30 overlaps with the opening portion 27 in the diaper continuous body 10 (slit-like opening in plan view). The portion 27 may be located at a portion sandwiched between a pair of opening edges along a direction orthogonal to the conveyance direction A. That is, in the diaper continuous body 10, even in a portion that is not sandwiched between the support member 21 and the pressure belt 24 (pressing member), in the vicinity of the opening 27 (opening edge), that is, as described above, The fused part 40 can be formed if the pressure applied by the clamping between the members 21 and 24 is practically affected.
　こうして製造されたおむつ１の主たる特長部分の１つとして、サイドシール部４に、前身頃Ｆにおける外装体３の縁部３Ｆと後身頃Ｒにおける外装体３の縁部３Ｒが、該サイドシール部の長手方向に延在する連続線状の融着部４０で結合したシール縁部４１が形成されることが挙げられる。
　シール縁部４１は、図９（ａ）及び図９（ｂ）に示すように、着用時におけるサイドシール部４が延びる方向と直交する断面において、融着部４０からなる外縁４ａが、着用物品の内方に向かって窪んだ形状を有している。また、シール縁部４１における融着部４０は、同断面において、おむつの外面に表れる幅Ｗ４が狭く、その幅Ｗ４は、好ましくは５ｍｍ以下、より好ましくは３ｍｍ以下であり、更に好ましくは２ｍｍ以下である。 As one of the main features of the diaper 1 manufactured in this manner, the side seal portion 4 includes an edge portion 3F of the outer body 3 in the front body F and an edge portion 3R of the outer body 3 in the rear body R. The sealing edge part 41 couple | bonded by the continuous linear fusion part 40 extended in the longitudinal direction of this is mentioned.
As shown in FIG. 9A and FIG. 9B, the seal edge 41 has an outer edge 4a composed of the fused portion 40 in the cross section orthogonal to the direction in which the side seal portion 4 extends when worn. It has a shape recessed toward the inside. Further, the fused portion 40 in the seal edge portion 41 has a narrow width W4 that appears on the outer surface of the diaper in the same cross section, and the width W4 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less. It is.
　本発明におけるシール縁部４１の融着部４０は、サイドシール部４の長手方向の全長に亘って、パンツ型着用物品の外面に表れる幅Ｗ４が一定であることが好ましい。
　ここで、サイドシール部４の長手方向の全長に亘って、パンツ型着用物品の外面に表れる幅Ｗ４が一定とは、サイドシール部４の長手方向の全範囲における、当該幅Ｗ４の最大値と当該幅Ｗ４の最小値との差が、当該最大値の５０％未満であることを意味する。本発明、特に本発明の製造方法によれば、当該幅Ｗ４をほぼ一定にして、柔軟性や肌触り等を良好に維持しつつ、融着強度をほぼ一定に設けられる利点がある。
　なお、当該幅Ｗ４は前述したように狭く、製品全体の大きさから考えて、サイドシール部４の幅Ｗ４が５０％振れたとしても実質的には細く、上述した融着強度や外観を有する。 It is preferable that the fusion | bond part 40 of the seal edge part 41 in this invention has the constant width W4 which appears on the outer surface of a pants | underpants type wearing article over the full length of the longitudinal direction of the side seal part 4. FIG.
Here, the width W4 appearing on the outer surface of the pants-type wearing article is constant over the entire length in the longitudinal direction of the side seal part 4 and the maximum value of the width W4 in the entire range in the longitudinal direction of the side seal part 4 It means that the difference from the minimum value of the width W4 is less than 50% of the maximum value. According to the present invention, particularly the manufacturing method of the present invention, there is an advantage that the fusion strength can be provided substantially constant while maintaining the flexibility W, the touch, etc., with the width W4 being substantially constant.
The width W4 is narrow as described above. Considering the size of the entire product, even if the width W4 of the side seal portion 4 is swung by 50%, the width W4 is substantially narrow and has the above-described fusion strength and appearance. .
　また、図７（ｃ）や図３に示すように、腹側部１Ａ（外装体Ｆ）と背側部１Ｂ（後身頃Ｒ）とを重ねた平面状態においては、サイドシール部４が延びる方向と直交する方向（おむつ１の横方向Ｙと同方向）の断面において、前記分断によって生じたサイドシール部４（シール縁部４１）は、融着部４０の外縁からなる外縁４ａが、おむつ１の内方に向かって凸の弧状をなし、且つ外縁４ａを含んでそれよりも該おむつ１の内方に、該外装体３を構成する４枚のシート３１，３２どうしの融着部４０が形成され、該融着部４０は、該外装体３の厚み方向（図７（ｃ）又は図８の上下方向）の中央部が両端部（上端部及び下端部）に比して幅が広い。より具体的には、融着部４０は、おむつ１の横方向Ｙ（レーザー光による分断方向と直交する方向）に沿う断面視において、厚み方向において中央部に向けて融着部４０の幅が徐々に広くなっており、所謂、三日月状又は半月状に形成されている〔図７（ｃ）に示す融着部４０は三日月状〕。シール縁部４１は、着用状態においても、このような形状を有していることが好ましい。 Moreover, as shown in FIG.7 (c) and FIG. 3, in the planar state which accumulated the abdominal side part 1A (exterior body F) and the back side part 1B (rear body part R), the direction where the side seal part 4 is extended. The side seal part 4 (seal edge part 41) generated by the above-mentioned division in the cross section in the direction perpendicular to the horizontal direction (the same direction as the lateral direction Y of the diaper 1) is the outer edge 4a formed by the outer edge of the fused part 40. A fusion arcuate portion 40 of the four sheets 31 and 32 constituting the outer package 3 is formed on the inner side of the diaper 1 including the outer edge 4a and more on the inner side of the diaper 1 than the outer arc 4a. The fusion part 40 is formed, and the center part in the thickness direction of the exterior body 3 (the vertical direction in FIG. 7C or FIG. 8) is wider than the both end parts (upper end part and lower end part). . More specifically, the fusion part 40 has a width of the fusion part 40 toward the center part in the thickness direction in a cross-sectional view along the lateral direction Y of the diaper 1 (direction orthogonal to the dividing direction by the laser beam). It gradually becomes wider and is formed in a so-called crescent or half-moon shape (the fused portion 40 shown in FIG. 7 (c) has a crescent shape). It is preferable that the seal edge part 41 has such a shape even in a worn state.
　サイドシール部４は、シートの形成材料が溶融固化してなる融着部４０の存在により、おむつ１の他の部位に比して硬くて肌触りが悪く、おむつ１の着用感を低下させる原因となり得る部位であるところ、このように融着部４０がおむつ１の幅方向の断面視において三日月状又は半月状に形成されていると、従来のサイドシール部における融着部（例えば特許文献１の図１に記載の符号９で示す部位）のように同断面視において矩形形状に形成されている場合に比して、サイドシール部４を構成する外装体３の側縁部の角部３Ｓに存する融着部４０の割合が減少し、これにより角部３Ｓが本来有する柔軟性、肌触り感が損なわれ難くなるため、従来品に比しておむつの着用感が向上する。一方、サイドシール部４の融着強度に大きな影響を及ぼす部位である、外装体３の側縁部の厚み方向の中央部（外装体３の一面側の角部３Ｓと他面側の３Ｓとに挟まれた部分の中央部）には、十分な量の融着部４０が存しているため、サイドシール部４は実用上十分な融着強度を有し、おむつ１の着用中にサイドシール４が破れる等の不都合が生じ難い。 The side seal portion 4 is harder and softer than other parts of the diaper 1 due to the presence of the fused portion 40 formed by melting and solidifying the sheet forming material, and causes the feeling of wearing the diaper 1 to be reduced. When the fusion part 40 is formed in a crescent shape or a half moon shape in a cross-sectional view in the width direction of the diaper 1 as described above, the fusion part in the conventional side seal part (for example, in Patent Document 1) Compared to the case where it is formed in a rectangular shape in the same sectional view as shown in FIG. 1 (part indicated by reference numeral 9), the corner 3S of the side edge portion of the exterior body 3 constituting the side seal portion 4 is formed. Since the ratio of the existing fused portion 40 is reduced, and the flexibility and touch feeling that the corner portion 3S originally has are hardly damaged, the wearing feeling of the diaper is improved as compared with the conventional product. On the other hand, the central portion in the thickness direction of the side edge of the exterior body 3 (the corner 3S on the one surface side of the exterior body 3 and the 3S on the other surface side, which is a part that greatly affects the fusion strength of the side seal portion 4) Since a sufficient amount of the fused portion 40 exists in the center portion between the side portions), the side seal portion 4 has a practically sufficient fusion strength, and the side seal portion 4 is worn while the diaper 1 is worn. Inconveniences such as tearing of the seal 4 hardly occur.
　また、サイドシール部４（融着部４０）は、おむつ１の着用状態又は自然状態（収縮状態）において外部から視認し難いという特徴を有している。図９（ａ）及び図９（ｂ）には、おむつ１の着用時にウエスト開口部８が拡げられた状態における、サイドシール部４（融着部４０）が示されている。ウエスト開口部８が拡げられた状態において、サイドシール部４は、通常は図９（ａ）に示すように、融着部４０が露出した状態となるが、サイドシール部４の外縁４ａが外装体３の内方に向かって凸の弧状をなしていること、及び融着部４０が従来のサイドシール部（融着部）に比して小さいこと等により、外部から視認し難い。特に、サイドシール部４の外縁４ａが外装体３の内方に向かって凸の弧状をなしていることにより、シート３１，３２の形成材料如何によっては、図９（ｂ）に示すように、おむつ１の着用時にウエスト開口部８が拡げられた状態においては、腹側部１Ａ側の外装体３の側縁部の角部３Ｓと背側部１Ｂ側の外装体３の側縁部の角部３Ｓとが接近し、両角部３Ｓ，３Ｓ間の離間距離が縮まる場合がある。そのため、両角部３Ｓ，３Ｓ間に位置する融着部４０は、該融着部４０よりもおむつ１の外方側に位置する、互いに近接した両角部３Ｓ，３Ｓによって、手で触れ難く且つ外部から視認し難い状態となり、それによって、おむつ１の着用感のみならず外観も向上する。 Moreover, the side seal part 4 (fusion | fusion part 40) has the characteristic that it is hard to visually recognize from the outside in the wearing state or natural state (contraction state) of the diaper 1. 9A and 9B show the side seal portion 4 (fused portion 40) in a state where the waist opening 8 is expanded when the diaper 1 is worn. In the state where the waist opening 8 is expanded, the side seal portion 4 is normally in a state where the fused portion 40 is exposed as shown in FIG. 9A, but the outer edge 4a of the side seal portion 4 is the exterior. It is difficult to visually recognize from the outside due to the convex arc shape toward the inside of the body 3 and the fact that the fused portion 40 is smaller than the conventional side seal portion (fused portion). In particular, the outer edge 4a of the side seal portion 4 has a convex arc shape toward the inner side of the exterior body 3, so that depending on the forming material of the sheets 31, 32, as shown in FIG. In a state where the waist opening 8 is expanded when the diaper 1 is worn, the corner 3S of the side edge of the exterior body 3 on the abdominal side 1A side and the corner of the side edge of the exterior body 3 on the back side 1B side The portion 3S may approach and the separation distance between the corner portions 3S and 3S may be reduced. Therefore, the fusion part 40 located between the two corners 3S and 3S is difficult to touch by the hand and is located on the outer side of the diaper 1 closer to the diaper 1 than the fusion part 40. Therefore, not only the feeling of wearing the diaper 1 but also the appearance is improved.
　レーザー光について説明すると、おむつ連続体１０（帯状の外装体３）に照射するレーザー光としては、外装体３を構成するシート（外層シート３１及び内層シート３２）に吸収され該シートを発熱させる発振波長のレーザー光を用いる。ここで、「外装体を構成するシート」は、外装体の一方の面（支持部材２１との当接面）を構成するシート（例えば前述した態様では外層シート３１）に限定されず、外装体を構成するシートであればどれであっても良い。外装体に照射するレーザー光が、該外装体を構成する個々のシートについて、該シートに吸収されて該シートを発熱させる発振波長であるか否かは、シートの材質と、使用するレーザー光の発振波長との関係で決まる。外装体を構成するシートが、使い捨ておむつや生理用ナプキン等の吸収性物品（サニタリー用品）の製造に汎用される合成樹脂製の不織布やフィルムである場合、レーザー光としては、ＣＯ2レーザー、ＹＡＧレーザー、ＬＤレーザー（半導体レーザー）、ＹＶＯ４レーザー、ファイバーレーザー等を用いることが好ましい。また、外装体を構成するシートが、合成樹脂として、ポリエチレン、ポリエチレンテレフタレート、ポリプロピレン等を含む場合、該シートに吸収され該シートを良好に発熱させ得る発振波長としては、例えば、８．０μｍ以上１５．０μｍ以下を用いることが好ましく、高出力のレーザー装置が存在するＣＯ2レーザーの発振波長の９．０μｍ以上１１．０μｍ以下を用いることが特に好ましい。レーザー光のスポット径、レーザー出力等は、外装体を構成するシートの材質や厚み等を考慮して適宜選択することができる。 Explaining the laser beam, the laser beam irradiated to the diaper continuous body 10 (band-shaped outer package 3) is absorbed by the sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the outer package 3 to generate heat. A laser beam having a wavelength is used. Here, the “sheet constituting the exterior body” is not limited to the sheet (for example, the outer layer sheet 31 in the above-described embodiment) constituting one surface of the exterior body (the contact surface with the support member 21). Any sheet may be used as long as the sheet is configured. Whether or not the laser light applied to the exterior body has an oscillation wavelength that is absorbed by the sheet and generates heat for the individual sheets constituting the exterior body depends on the material of the sheet and the laser light to be used. Determined by the relationship with the oscillation wavelength. When the sheet constituting the outer package is a non-woven fabric or film made of synthetic resin that is widely used in the manufacture of absorbent articles (sanitary products) such as disposable diapers and sanitary napkins, the laser beam may be CO 2 laser, YAG It is preferable to use a laser, an LD laser (semiconductor laser), a YVO4 laser, a fiber laser, or the like. When the sheet constituting the outer package contains polyethylene, polyethylene terephthalate, polypropylene or the like as a synthetic resin, the oscillation wavelength that can be absorbed by the sheet and cause the sheet to generate heat is, for example, 8.0 μm or more and 15 It is preferable to use 0.0 μm or less, and it is particularly preferable to use an oscillation wavelength of 9.0 μm or more and 11.0 μm or less of a CO 2 laser in which a high-power laser device exists. The spot diameter of laser light, laser output, and the like can be appropriately selected in consideration of the material and thickness of the sheet constituting the exterior body.
　外装体３の分断と溶着とが同時に実施される工程を経て得られた一対のサイドシール部４，４を具備するおむつ１は、サイドシール部４の柔軟性、肌触りに優れ、着用感が良好である。その一方、おむつ連続体１０が、前記の８層構造部分と前記の４層構造部分のようなシートの積層枚数が異なる部分を有すると、サイドシール部を構成するシール縁部に、積層枚数の差に起因する融着強度の差が生じ易い。そのため、本発明の製造方法の第１実施態様においては、以下に説明する方法により、サイドシール部の積層枚数の差に起因する融着強度の差を減少させている。 The diaper 1 having a pair of side seal portions 4 and 4 obtained through the process of dividing and welding the exterior body 3 at the same time is excellent in flexibility and touch of the side seal portion 4 and has a good wearing feeling. It is. On the other hand, when the diaper continuous body 10 has a portion where the number of laminated sheets is different, such as the 8-layer structure portion and the 4-layer structure portion, the number of the laminated sheets is formed on the seal edge portion constituting the side seal portion. A difference in fusion strength due to the difference is likely to occur. Therefore, in the first embodiment of the manufacturing method of the present invention, the difference in fusion strength due to the difference in the number of laminated side seal portions is reduced by the method described below.
　本発明の製造方法の第１実施態様においては、図１１に示すように、おむつ連続体１０（帯状の外装体３）のサイドシール部の形成予定部位１０Ｃに、スリット状の開口部（光通過部）２７を介してレーザー光３０を照射して、おむつ連続体１０における帯状の外装体を分断し、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させてシール縁部４１を形成する際に、レーザー光３０を、光通過部２７の長手方向に沿って一方向に直線状に走査させるとともに、その照射するレーザー光の出力又は走査速度を、前述した８層構造部分（高積層部分）３Ａに照射するときと、前述した４層構造部分（低積層部分）３Ｂに照射するときとで、異ならせる。 In the first embodiment of the manufacturing method of the present invention, as shown in FIG. 11, a slit-like opening (light passing) Part) 27 is irradiated with a laser beam 30 to divide the strip-shaped outer package in the diaper continuous body 10, and the cut edges of the laminated outer package produced by the division are fused to form a seal edge. When forming 41, the laser beam 30 is linearly scanned in one direction along the longitudinal direction of the light passage portion 27, and the output or scanning speed of the irradiated laser beam is determined by the above-described eight-layer structure portion. (Highly laminated portion) 3A is different from that when the above-described four-layer structure portion (low laminated portion) 3B is irradiated.
　おむつ連続体１０を、スリット状の開口部２７（光通過部）を有する支持部材２１と加圧ベルト２４等との間で加圧するとき、特に円筒ロール２３の周面部を構成する支持部材２１に巻き掛けるとともに加圧ベルト等２４等との間で加圧するとき、おむつ連続体１０（帯状の外装体３）のサイドシール部の形成予定部位１０Ｃは、その厚みの差に起因して、８層構造部分３Ａが４層構造部分３Ｂより強く加圧され易い。
　そして、８層構造部分３Ａが４層構造部分３Ｂより強く加圧された状態で、レーザー光を、スポット径及びレーザー出力を変えずに、スリット状の開口部２７（光通過部）の中央部を、長手方向に一端側から他端側に向かって等速度で走査させて照射した場合には、シート間の密着の程度等によって、８層構造部分（高積層部分）３Ａに生じるシール縁部４１の融着強度が、４層構造部分（低積層部分）３Ｂに生じる融着強度よりも高くなる。 When the diaper continuous body 10 is pressurized between the support member 21 having the slit-shaped opening 27 (light passage portion) and the pressure belt 24, the support member 21 that constitutes the peripheral surface portion of the cylindrical roll 23 in particular. When wrapping and pressurizing between the pressure belt and the like 24, etc., the portion 10C to be formed of the side seal portion of the diaper continuous body 10 (band-shaped outer package 3) has eight layers due to the difference in thickness. The structure portion 3A is more easily pressed than the four-layer structure portion 3B.
Then, in the state where the 8-layer structure portion 3A is pressed more strongly than the 4-layer structure portion 3B, the laser beam is not changed in spot diameter and laser output, and the central portion of the slit-shaped opening 27 (light passage portion). Is irradiated at a constant speed from one end side to the other end side in the longitudinal direction, depending on the degree of adhesion between the sheets, etc., the seal edge produced in the 8-layer structure portion (high lamination portion) 3A The fusion strength 41 is higher than the fusion strength generated in the four-layer structure portion (low lamination portion) 3B.
　そのため、本発明の製造方法の第１実施態様においては、スリット状の開口部（光通過部）の長手方向に沿って直線的に走査させて、サイドシール部の形成予定部位にレーザー光を照射する際、８層構造部分（合計積層枚数が最も多い高積層部分）３Ａにレーザー光を照射している間のレーザー光の出力値を、４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂに照射する間の出力値に比べて低下させるか、又はスリット状の開口部（光通過部）の長手方向に沿って直線的に走査させて、サイドシール部の形成予定部位にレーザー光を照射する際、８層構造部分（合計積層枚数が最も多い高積層部分）３Ａにレーザー光を照射している間のレーザー光の走査速度を、４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂに照射する間の走査速度に比べて高速とする。
　これにより、８層構造部分３Ａの分断により生じた切断縁部の融着によって形成されるシール縁部の融着強度と、４層構造部分３Ｂの分断により生じた切断縁部の融着によって形成されるシール縁部の融着強度との差を減少させることができ、８層構造部分３Ａと４層構造部分３Ｂとで融着強度が等しいシール縁部４１の形成も容易となる。 For this reason, in the first embodiment of the manufacturing method of the present invention, laser light is irradiated to the formation site of the side seal portion by linearly scanning along the longitudinal direction of the slit-shaped opening (light passage portion). In this case, the output value of the laser beam while irradiating the laser beam to the 8 layer structure portion (high lamination portion having the largest total number of laminations) 3A is changed to the four layer structure portion (low lamination portion having the smallest total lamination number). ) Reduced compared to the output value during irradiation of 3B, or scanned linearly along the longitudinal direction of the slit-shaped opening (light passage part), and laser light is applied to the site where the side seal part is to be formed. When the laser beam is irradiated, the scanning speed of the laser beam while the laser beam is radiated to the 8-layer structure portion (high stack portion where the total number of stacked layers is the largest) 3A is low. (Laminated part) 3B irradiated And faster than the scanning speed between that.
Thereby, it is formed by the fusion strength of the seal edge formed by the fusion of the cut edge generated by the division of the eight-layer structure portion 3A and the fusion of the cut edge generated by the division of the four-layer structure portion 3B. The difference between the sealing edge portion and the fusion strength of the sealing edge portion can be reduced, and the formation of the sealing edge portion 41 having the same fusion strength in the eight-layer structure portion 3A and the four-layer structure portion 3B is facilitated.
　本発明のパンツ型着用物品の第１実施形態（パンツ型使い捨ておむつ）は、このような方法により、８層構造部分３Ａと４層構造部分３Ｂとに融着強度が等しいシール縁部４１を形成したものであり、サイドシール部４に形成されたシール縁部４１は、８層構造部分３Ａから４層構造部分３Ｂに亘って形成されているとともに、８層構造部分３Ａにおける融着強度と４層構造部分３Ｂにおける融着強度とが等しくなっている。 The first embodiment of the pant-type wearing article of the present invention (pants-type disposable diaper) forms the sealing edge 41 having the same fusion strength between the 8-layer structure portion 3A and the 4-layer structure portion 3B by such a method. The seal edge portion 41 formed on the side seal portion 4 is formed from the 8-layer structure portion 3A to the 4-layer structure portion 3B, and has a fusion strength of 4 in the 8-layer structure portion 3A. The fusion strength in the layer structure portion 3B is equal.
　ここで、融着強度が等しいとは、サイドシール部４におけるシートの合計積層枚数が相互に異なる複数の部位のそれぞれについて、下記方法により融着強度を測定したときに、融着強度が最大の部位の融着強度の値（最大値）と融着強度が最小の部位の融着強度の値（最小値）とが、それぞれ、平均融着強度の値±３０％以内であることを意味する。
　なお、平均融着強度は、シートの合計積層枚数が異なる部位のそれぞれについて各１点以上を含むサイドシール全域を測定した融着強度の平均値である。 Here, when the fusion strength is equal, the fusion strength is the maximum when the fusion strength is measured by the following method for each of a plurality of portions where the total number of stacked sheets in the side seal portion 4 is different from each other. It means that the fusion strength value (maximum value) of the part and the fusion strength value (minimum value) of the part having the smallest fusion strength are within the average fusion strength value ± 30%, respectively. .
The average fusion strength is an average value of the fusion strength measured over the entire side seal including at least one point for each of the portions where the total number of laminated sheets is different.
＜融着強度の測定方法＞
　パンツ型着用物品から、サイドシール部４が長手方向の中央に位置し、その両側に前身頃Ｆ側の外装体３の一部及び後身頃Ｒ側の外装体３の一部を有する、幅が１０ｍｍの短冊状の試験片を切り出し、該試験片を、引っ張り試験機（例えば、エーアンドデイ社のテンシロン「ＲＴＣシリーズ」）のチャック間に固定する。そして、その試験片を、チャック間の間隔の拡大速度を３００ｍｍ／分として、長手方向に、前身頃Ｆ側の外装体３と後身頃Ｒ側の外装体３とが完全に分割されるまで引っ張る。そのときの、引っ張り応力の最大値を融着強度とする。 <Measurement method of fusion strength>
From the pants-type wearing article, the side seal part 4 is located in the center in the longitudinal direction, and has a width having a part of the outer body 3 on the front body F side and a part of the outer body 3 on the rear body R side on both sides thereof. A 10 mm strip-shaped test piece is cut out, and the test piece is fixed between chucks of a tensile tester (for example, Tensilon “RTC series” manufactured by A & D). Then, the test piece is pulled at an extension speed of the interval between chucks of 300 mm / min until the outer body 3 on the front body F side and the outer body 3 on the rear body R side are completely divided in the longitudinal direction. . The maximum value of the tensile stress at that time is defined as the fusion strength.
　第１実施形態のおむつによれば、前身頃Ｆにおける外装体の縁部と後身頃Ｒにおける外装体の縁部とが、サイドシール部４の長手方向に延在する連続線状の融着部で結合したシール縁部４１を形成して、サイドシール部４を形成してあるため、サイドシール部４の柔軟性や肌触りに優れている。
　また、シール縁部４１は、ウエスト開口部８側の開口端部近傍に形成された８層構造部分３Ａにおける融着強度が、それよりレッグ開口部９側に形成された４層構造部分３Ｂにおける融着強度と等しく、８層構造部分３Ａと４層構造部分３Ｂとに同条件でレーザー光を照射した場合に比して８層構造部分３Ａに形成される融着強度を低く抑えることができるため、おむつ（着用物品）を取り外す際に、サイドシール部４を、ウエスト開口部８側から引き裂くことが容易であり、おむつ（着用物品）取り外し作業をスムーズに行うことができる。 According to the diaper of the first embodiment, the continuous linear fused portion in which the edge of the exterior body in the front body F and the edge of the exterior body in the back body R extend in the longitudinal direction of the side seal portion 4. The side seal part 41 is formed by forming the seal edge part 41 connected in step S4, so that the side seal part 4 is excellent in flexibility and touch.
Further, the seal edge portion 41 has a fusion strength in the 8-layer structure portion 3A formed in the vicinity of the opening end portion on the waist opening portion 8 side in the 4-layer structure portion 3B formed on the leg opening portion 9 side. It is equal to the fusion strength, and the fusion strength formed on the 8-layer structure portion 3A can be kept lower than when the 8-layer structure portion 3A and the 4-layer structure portion 3B are irradiated with laser light under the same conditions. Therefore, when removing the diaper (wearing article), it is easy to tear the side seal portion 4 from the waist opening 8 side, and the diaper (wearing article) removal operation can be performed smoothly.
　ウエスト開口部８側又はレッグ開口部９側からの引き裂き容易性の観点及び着用中におけるズレ落ち防止等の観点から、シール縁部は、８層構造部分３Ａ及び４層構造部分３Ｂ等の「シートの合計積層枚数が異なる複数の部分」のそれぞれにおいて、上述した測定方法で測定した融着強度が、好ましくは１８Ｎ／１０ｍｍ以下、更に好ましくは１５Ｎ／１０ｍｍ以下であり、また、好ましくは１．５Ｎ／１０ｍｍ以上、更に好ましくは２Ｎ／１０ｍｍ以上である。 From the viewpoint of ease of tearing from the waist opening 8 side or the leg opening 9 side, and from the viewpoint of preventing slipping off during wearing, the sealing edge is a “sheet” such as the 8-layer structure portion 3A and the 4-layer structure portion 3B. In each of the “parts having different total number of laminated layers”, the fusion strength measured by the measurement method described above is preferably 18 N / 10 mm or less, more preferably 15 N / 10 mm or less, and preferably 1.5 N / 10 mm or more, more preferably 2 N / 10 mm or more.
　第１実施形態のおむつ１を製造する本発明の製造方法の第２実施態様においては、前述したレーザー式接合装置２０における支持部材２１として、図１２に示すように、開口部２７Ａ（光通過部）の幅が、開口部２７Ａ（光通過部）の長手方向に非連続的に変化する支持部材２１Ａを用いる。また、スリット状の開口部２７（光通過部）を介したレーザー光の照射は、レーザー光３０を、スポット径及びレーザー出力を変えずに、スリット状の開口部２７（光通過部）の中央部を一方向に等速度に走査させて行う。これら以外は、第１実施態様と同様にして第１実施形態のおむつ１を製造する。 In the second embodiment of the manufacturing method of the present invention for manufacturing the diaper 1 of the first embodiment, as shown in FIG. 12, as the supporting member 21 in the laser-type bonding apparatus 20, an opening 27A (light passage portion) is provided. ) Is used as a support member 21A that discontinuously changes in the longitudinal direction of the opening 27A (light passage portion). Further, the irradiation of the laser beam through the slit-shaped opening 27 (light passage portion) is performed by using the laser beam 30 at the center of the slit-shaped opening 27 (light passage portion) without changing the spot diameter and the laser output. The scanning is performed at a constant speed in one direction. Except these, the diaper 1 of 1st Embodiment is manufactured similarly to a 1st embodiment.
　より具体的に説明すると、前身頃側と後身頃側とを重ねた状態のおむつ連続体１０（帯状の外装体３）を、周面部が支持部材２１Ａからなる円筒ロール２３に導入し、図１に示すように、加圧ベルト２４と支持部材２１Ａとの間で加圧しつつ、該おむつ連続体１０（帯状の外装体３）のサイドシール部の形成予定部位１０Ｃに対して、開口部２７Ａを介してレーザー光３０を照射する。
　支持部材２１Ａにおける開口部２７Ａ（光通過部）は、図１２に示すように、おむつ連続体１０（帯状の外装体３）のサイドシール部の形成予定部位１０Ｃのうち、８層構造部分（合計積層枚数が最も多い高積層部分）３Ａと重なる部分に幅広部５２を有し、４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂと重なる部分に、幅広部５２より幅が狭い幅狭部５３を有している。 More specifically, the diaper continuous body 10 (band-shaped exterior body 3) in a state where the front body side and the back body side are overlapped is introduced into a cylindrical roll 23 having a peripheral surface portion made of a support member 21A. As shown in FIG. 5, the opening 27A is formed with respect to the formation planned portion 10C of the side seal portion of the diaper continuous body 10 (band-shaped outer package 3) while applying pressure between the pressure belt 24 and the support member 21A. Then, the laser beam 30 is irradiated.
As shown in FIG. 12, the opening 27 </ b> A (light passage portion) in the support member 21 </ b> A is an eight-layer structure portion (total) of the planned portion 10 </ b> C of the side seal portion of the diaper continuous body 10 (band-shaped exterior body 3). (A high lamination portion with the largest number of layers) a wide portion 52 in a portion overlapping with 3A, and a width narrower than the wide portion 52 in a portion overlapping with a four-layer structure portion (low lamination portion with the smallest total number of laminations) 3B It has a narrow portion 53.
　第２実施態様の製造方法においては、サイドシール部の形成予定部位１０Ｃのうちの８層構造部分３Ａについては、支持部材２７Ａにおける、幅狭部５３を挟んだ両側部分で押さえた状態で、レーザー光３０を照射し、４層構造部分３Ｂについては、支持部材２７Ａにおける、幅広部５２を挟んだ両側部分で押さえた状態で、レーザー光３０を照射する。そのため、８層構造部分３Ａと４層構造部分３Ｂとに、シートの積層枚数に起因する厚み差があっても、８層構造部分３Ａと４層構造部分３Ｂとで、融着させる前身頃Ｆ側の外装体と後身頃Ｒ側の外装体との密着状態を同様とすることができる。
　そのため、その状態で、レーザー光３０の照射を行えば、８層構造部分３Ａの分断により生じた切断縁部の融着によって形成されるシール縁部の融着強度と、４層構造部分３Ｂの分断により生じた切断縁部の融着によって形成されるシール縁部の融着強度との差を減少させることができ、８層構造部分３Ａと４層構造部分３Ｂとで融着強度が等しいシール縁部４１の形成も容易となる。 In the manufacturing method of the second embodiment, the 8-layer structure portion 3A of the side seal portion formation planned portion 10C is pressed by both side portions sandwiching the narrow portion 53 in the support member 27A. The light 30 is irradiated, and the four-layer structure portion 3B is irradiated with the laser light 30 while being pressed by both side portions of the support member 27A across the wide portion 52. Therefore, even if there is a thickness difference due to the number of stacked sheets between the 8-layer structure portion 3A and the 4-layer structure portion 3B, the front body F to be fused between the 8-layer structure portion 3A and the 4-layer structure portion 3B. The close contact state between the side exterior body and the back body R side exterior body can be made the same.
Therefore, if irradiation of the laser beam 30 is performed in that state, the fusion strength of the seal edge formed by the fusion of the cut edge caused by the division of the 8-layer structure portion 3A, and the four-layer structure portion 3B The difference between the sealing strength of the seal edge formed by the fusion of the cut edge caused by the division can be reduced, and the seal having the same fusion strength in the 8-layer structure portion 3A and the 4-layer structure portion 3B. The formation of the edge portion 41 is also facilitated.
　このように第２実施態様の製造方法においては、光通過部２７の幅が、光通過部長手方向に変化する支持部材を用い、その光通過部を介してレーザー光を照射することにより、柔軟性及び肌触りに優れるとともに、引き裂き易さに優れたサイドシールを効率良く形成することができる。
　なお、幅広部５２の幅Ｗ１に対する幅狭部５３の幅Ｗ２の比（Ｗ２／Ｗ１）は、例えば、好ましくは０．０２５以上、より好ましくは０．０５以上であり、また、好ましくは０．９以下であり、より好ましくは０．８５以下であり、また、好ましくは０．０２５～０．９、より好ましくは０．０５～０．８５である。 As described above, in the manufacturing method according to the second embodiment, the width of the light passage portion 27 is changed by using the support member that changes in the longitudinal direction of the light passage portion, and the laser light is irradiated through the light passage portion, thereby making it flexible. It is possible to efficiently form a side seal that is excellent in property and touch and is easy to tear.
The ratio (W2 / W1) of the width W2 of the narrow portion 53 to the width W1 of the wide portion 52 is, for example, preferably 0.025 or more, more preferably 0.05 or more, and preferably 0.00. It is 9 or less, more preferably 0.85 or less, preferably 0.025 to 0.9, more preferably 0.05 to 0.85.
　図１３は、第１実施形態のおむつ１を製造する本発明の製造方法の第３実施態様の説明図である。第３実施態様の製造方法においては、前述したレーザー式接合装置２０における支持部材２１として、帯状の外装体３が接する外面２１ａにおける開口部２７（光通過部）の近傍に、該外装体３側に突出する突出部４５を有し、該突出部４５の高さ４５ｈが、開口部２７（光通過部）の長手方向に沿って非連続的に変化する支持部材２１Ｂを用いる。 FIG. 13 is an explanatory diagram of a third embodiment of the manufacturing method of the present invention for manufacturing the diaper 1 of the first embodiment. In the manufacturing method of the third embodiment, as the support member 21 in the laser type bonding apparatus 20 described above, the exterior body 3 side is located near the opening 27 (light passage portion) in the outer surface 21a with which the strip-shaped exterior body 3 contacts. The support member 21 </ b> B has a protrusion 45 that protrudes in the height direction, and the height 45 h of the protrusion 45 changes discontinuously along the longitudinal direction of the opening 27 (light passage portion).
　上述したレーザー式接合装置２０においては、レーザー光が通過可能な光通過部が、支持部材２１を厚み方向に貫通するスリット状の開口部２７からなるため、おむつ連続体１０（帯状の外装体３）における開口部２７と重なる部分（分断予定部分１０Ｃ）には、支持部材２１と加圧ベルト２４（押さえ部材）とに挟まれることにより発生する加圧力が発生しないが、該分断予定部分１０Ｃは該加圧力が事実上影響する部分であるため、融着部４０が形成される。融着部４０がより安定的に形成されるようにするためには、両部材２１，２４での挟持による加圧力をより高める工夫が有効である。 In the laser-type bonding apparatus 20 described above, the light passing portion through which the laser light can pass is composed of the slit-shaped opening 27 that penetrates the support member 21 in the thickness direction. ) In the portion overlapping with the opening portion 27 (scheduled part 10C) does not generate pressure applied by being sandwiched between the support member 21 and the pressure belt 24 (pressing member). Since the applied pressure is a portion that is substantially affected, the fused portion 40 is formed. In order to form the fused portion 40 more stably, it is effective to further increase the pressure applied by the clamping between the members 21 and 24.
　第３実施態様で用いる支持部材２１Ｂにおいては、図１３及び図１４に示すように、おむつ連続体１０が配される支持部材２１の外面２１ａにおけるスリット状の開口部２７の近傍（開口部２７の縁部から３５ｍｍ以内の領域）に、周辺部よりも該外面２１ａ上のおむつ連続体１０側（帯状の外装体３側、加圧ベルト２４側）に突出した突出部４５が形成されている。更に説明すると、突出部４５は、支持部材２１の外面２１ａにおける、複数の開口部２７それぞれの長手方向（支持部材２１の幅方向）に延びる一対の開口縁部それぞれに沿って形成されており、各突出部４５は、開口部２７に沿ってその長手方向に延びて形成されている。各突出部４５は、長手方向に、突出高さ４５ｈ（周辺部からの突出高さ）が相互に異なる高位部４５ａ及び低位部４５ｂを有している。低位部４５ｂは、突出高さ４５ｈが高位部４５ａに比して低い。突出部４５の頂部は、平坦でも良く、所定の曲率を有する曲面であっても良く、斯かる曲面は、円筒状の支持部材２１の外面２１ａと平行であっても良い。 In the support member 21B used in the third embodiment, as shown in FIGS. 13 and 14, in the vicinity of the slit-shaped opening 27 (on the opening 27 of the support member 21 on which the diaper continuous body 10 is arranged). A protruding portion 45 is formed on the outer surface 21a on the outer diaper continuous body 10 side (on the belt-shaped outer package 3 side and the pressure belt 24 side) with respect to the outer surface 21a. More specifically, the protrusion 45 is formed along each of a pair of opening edges extending in the longitudinal direction of each of the plurality of openings 27 (the width direction of the support member 21) on the outer surface 21 a of the support member 21. Each protrusion 45 is formed to extend in the longitudinal direction along the opening 27. Each protrusion 45 has a high-order part 45a and a low-order part 45b having different protrusion heights 45h (projection heights from the peripheral part) in the longitudinal direction. The lower part 45b has a lower protrusion height 45h than the higher part 45a. The top of the protrusion 45 may be flat or a curved surface having a predetermined curvature, and the curved surface may be parallel to the outer surface 21 a of the cylindrical support member 21.
　支持部材２１の外面２１ａにおける開口部２７の近傍（開口縁部）に、高位部４５ａを有する突出部４５を形成することにより、高位部４５ａの近傍においては、おむつ連続体１０（帯状の外装体）における前記分断予定部分近傍に対する加圧力を効果的に高めることができる。他方、低位部４５ｂの近傍においては、おむつ連続体１０（帯状の外装体）における前記分断予定部分近傍の加圧力を高位部４５ａの近傍に比して効果的に低下させることができる。 In the vicinity of the opening 27 on the outer surface 21a of the support member 21 (opening edge), a protruding part 45 having a high-order part 45a is formed, so that the diaper continuous body 10 (strip-shaped exterior body) is provided in the vicinity of the high-order part 45a. ) Can be effectively increased in the vicinity of the portion to be divided. On the other hand, in the vicinity of the low-order part 45b, the applied pressure in the vicinity of the part to be divided in the diaper continuous body 10 (strip-shaped exterior body) can be effectively reduced as compared with the vicinity of the high-order part 45a.
　第３実施態様の製造方法においては、サイドシール部の形成予定部位１０Ｃのうちの４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂについては、支持部材２７Ａにおける、光通過部２７を挟んだ両側の高位部４５ａで強く押さえた状態で、レーザー光３０を照射し、８層構造部分（合計積層枚数が最も多い高積層部分）３Ａについては、支持部材２７Ａにおける、光通過部２７を挟んだ両側の低位部４５ｂで高位部４５ａよりも弱く押さえた状態で、レーザー光３０を照射する。そのため、８層構造部分３Ａと４層構造部分３Ｂとに、シートの積層枚数に起因する厚み差があっても、８層構造部分３Ａと４層構造部分３Ｂとで、融着させる前身頃Ｆ側の外装体と後身頃Ｒ側の外装体との密着状態を同様とすることができる。
　そのため、その状態で、レーザー光３０の照射を行えば、８層構造部分３Ａの分断により生じた切断縁部の融着によって形成されるシール縁部の融着強度と、４層構造部分３Ｂの分断により生じた切断縁部の融着によって形成されるシール縁部の融着強度との差を減少させることができ、８層構造部分３Ａと４層構造部分３Ｂとで融着強度が等しいシール縁部４１の形成も容易となる。 In the manufacturing method of the third embodiment, the light passage portion 27 in the support member 27A is used for the four-layer structure portion (low lamination portion having the smallest total number of laminations) 3B in the portion 10C where the side seal portion is to be formed. The laser beam 30 is radiated in a state of being strongly pressed by the sandwiched high-level portions 45a, and the light-passing portion 27 in the support member 27A is applied to the eight-layer structure portion (high-layered portion having the largest total number of layers) 3A. The laser beam 30 is irradiated in a state in which the lower portion 45b on both sides is held weaker than the higher portion 45a. Therefore, even if there is a thickness difference due to the number of stacked sheets between the 8-layer structure portion 3A and the 4-layer structure portion 3B, the front body F to be fused between the 8-layer structure portion 3A and the 4-layer structure portion 3B. The close contact state between the side exterior body and the back body R side exterior body can be made the same.
Therefore, if irradiation of the laser beam 30 is performed in that state, the fusion strength of the seal edge formed by the fusion of the cut edge caused by the division of the 8-layer structure portion 3A, and the four-layer structure portion 3B A difference between the sealing strength of the sealing edge formed by the fusion of the cut edge caused by the division can be reduced, and the sealing with the same fusion strength in the 8-layer structure portion 3A and the 4-layer structure portion 3B. The formation of the edge portion 41 is also facilitated.
　第３実施態様の製造方法によれば、このように、突出部４５の突出高さが光通過部２７の長手方向に沿って変化する支持部材２７Ｂを用い、その支持部材２７Ｂによって加圧された帯状の外装体３に対して、その光通過部を介してレーザー光を照射することにより、柔軟性及び肌触りに優れるとともに、引き裂き易さに優れたサイドシールを効率良く形成することができる。 According to the manufacturing method of the third embodiment, as described above, the support member 27B in which the protrusion height of the protrusion 45 changes along the longitudinal direction of the light passage portion 27 is pressed by the support member 27B. By irradiating the belt-shaped outer package 3 with laser light through the light passage portion, it is possible to efficiently form a side seal that is excellent in flexibility and touch and excellent in tearing.
　サイドシール部４に所要の融着強度を確保する観点から、突出部４５の突出高さ４５ｈ（図１３参照）は、好ましくは０．１ｍｍ以上、更に好ましくは１ｍｍ以上であり、また、好ましくは１０ｍｍ以下、更に好ましくは８ｍｍ以下であり、また、好ましくは０．１ｍｍ以上１０ｍｍ以下、更に好ましくは１ｍｍ以上８ｍｍ以下である。
　また、突出部４５の幅４５ｗ（図１３参照。支持部材２１の幅方向と直交する方向の長さ。）は、好ましくは１ｍｍ以上、更に好ましくは２ｍｍ以上、そして、好ましくは２０ｍｍ以下、更に好ましくは１０ｍｍ以下、より具体的には、好ましくは１ｍｍ以上２０ｍｍ以下、更に好ましくは２ｍｍ以上１０ｍｍ以下である。
　また、低位部４５ｂは、高位部４５ａとの高低差が、好ましくは０．１ｍｍ以上、更に好ましくは０．２ｍｍ以上、そして、好ましくは５ｍｍ以下、更に好ましくは４ｍｍ以下、より具体的には、好ましくは０．１ｍｍ以上５ｍｍ以下、更に好ましくは０．２ｍｍ以上４ｍｍ以下である。
　なお、低位部４５ｂは、支持部材２１の外面２１ａから高位部４５ａと同じ幅で突出するもの代えて、支持部材２１の外面２１ａから全く突出しない部分であっても良い。 From the viewpoint of securing the required fusion strength to the side seal portion 4, the protrusion height 45h (see FIG. 13) of the protrusion 45 is preferably 0.1 mm or more, more preferably 1 mm or more, and preferably It is 10 mm or less, More preferably, it is 8 mm or less, Preferably it is 0.1 mm or more and 10 mm or less, More preferably, it is 1 mm or more and 8 mm or less.
The width 45w of the protrusion 45 (see FIG. 13; the length in the direction perpendicular to the width direction of the support member 21) is preferably 1 mm or more, more preferably 2 mm or more, and preferably 20 mm or less, more preferably. Is 10 mm or less, more specifically, preferably 1 mm or more and 20 mm or less, more preferably 2 mm or more and 10 mm or less.
Further, the lower portion 45b has a height difference from the higher portion 45a of preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically, Preferably they are 0.1 mm or more and 5 mm or less, More preferably, they are 0.2 mm or more and 4 mm or less.
The lower portion 45b may be a portion that does not protrude from the outer surface 21a of the support member 21 at all, instead of protruding from the outer surface 21a of the support member 21 with the same width as that of the high portion 45a.
　尚、おむつ１の着用状態又は自然状態（収縮状態）においてサイドシール部４（融着部４０）が外部から視認し難い状態となると、例えばおむつ１の使用後に、着用者である乳幼児からその保護者（例えば母親）がおむつを取り外す際にサイドシール部４を見つけ難く、おむつ１の取り外し作業に手間取るおそれがある。このような、サイドシール部４の視認性の低下に起因する不都合を解消する手段としては、例えば、サイドシール部４を横断するおむつ１の構成部材の色を、サイドシール部４よりも腹側（前側）と背側（後側）とで異ならせる方法が挙げられる。より具体的には例えば、おむつ１の腹側部１Ａ（前身頃）と背側部１Ｂ（後身頃）とで、ウエスト部弾性部材５、又は外装体３を構成するシート（外層シート３１、内層シート３２等）の色を異ならせる方法が挙げられる。
　斯かる方法を採用すると、色の切り替え部分にサイドシール部４が位置するようになるため、サイドシール部４の目視による視認性が一層高まり、前記不都合の発生が一層効果的に防止される。 In addition, when the side seal part 4 (fusion part 40) becomes difficult to visually recognize from the outside in the wearing state or the natural state (contracted state) of the diaper 1, for example, after the use of the diaper 1, the protection from the infant who is the wearer When a person (for example, a mother) removes the diaper, it is difficult to find the side seal portion 4, and there is a possibility that it takes time to remove the diaper 1. As a means for eliminating such inconvenience due to the decrease in the visibility of the side seal portion 4, for example, the color of the constituent member of the diaper 1 that crosses the side seal portion 4 is set to the ventral side of the side seal portion 4. The method of making it differ by (front side) and back side (rear side) is mentioned. More specifically, for example, the waist part elastic member 5 or a sheet (outer layer sheet 31, inner layer) that constitutes the waist elastic member 5 or the back side part 1 </ b> B (rear body part) of the ventral side part 1 </ b> A (front body) and the back side part 1 </ b> B (back body) of the diaper 1. And a method of changing the color of the sheet 32 or the like.
When such a method is employed, the side seal portion 4 is positioned at the color switching portion, so that the visibility of the side seal portion 4 is further enhanced, and the occurrence of the inconvenience is further effectively prevented.
　本発明のパンツ型着用物品の製造方法の上述した各実施態様において、前身頃側と後身頃側とを重ねた状態の帯状の外装体（おむつ連続体１０）におけるサイドシール部の形成予定部位におけるシート間に接着剤が存在する場合、接着剤を存在しない場合と同一の条件でレーザー光の照射を行っても、シール縁部に得られる融着強度が異なることが多い。その理由は、接着剤があると強度が落ちる、融着に必要なエネルギーが接着剤を溶かすのに消費される、接着剤が異物となり融着を阻害する等である。
　そのため、サイドシール部の形成予定部位における積層されたシート間に接着剤を存在させる場合には、シート間に接着剤を存在させた状態で、融着強度を調整する手段として採用した手段（融着強度調整）を施す条件と得られる融着強度との関係を調べておき、その上で、合計積層枚数が異なる部位の融着強度の差が少なくなるように、その手段の条件、例えば、レーザー光の出力、レーザー光の走査速度、光通過部の幅、突出部４５の高さや幅等を、微調整することが好ましい。
　また、本発明のパンツ型着用物品の製造方法の上述した各実施態様において、前身頃側と後身頃側とを重ねた状態の帯状の外装体（おむつ連続体１０）におけるサイドシール部の形成予定部位におけるシート間に接着剤が存在し、その接着剤が存在する態様が、合計積層枚数が異なる部位によって異なる場合にも、各部に存在させる接着剤の態様ごとに、融着強度を調整する手段として採用した手段（融着強度調整）を施す条件と得られる融着強度との関係を調べておき、その結果を利用して、合計積層枚数が異なる部位の融着強度の差が少なくなるように、その手段の条件を微調整することが好ましい。より具体的には、レーザー光の出力、レーザー光の走査速度、光通過部の幅、突出部４５の高さ、突出部４５の幅等を、微調整することが好ましい。合計積層枚数が異なる部位によって、接着剤が存在する態様が異なるとは、対比される一方の部位におけるシート間には接着剤の存在し、他方の部位におけるシート間には接着剤が存在しない場合、対比される一方の部位におけるシート間には接着剤が全域に亘って存在する一方、他方の部位におけるシート間には接着剤がパターン塗工されている場合、対比される一方の部位におけるシート間にはすべてのシート間に接着剤が存在する一方、他方の部位におけるシート間には一部のシート間のみに接着剤が存在する場合等が挙げられる。 In each of the above-described embodiments of the method for manufacturing a pant-type wearing article of the present invention, the side seal portion is to be formed in the belt-shaped exterior body (diaper continuous body 10) in a state where the front body side and the back body side are overlapped. When an adhesive is present between the sheets, the fusion strength obtained at the seal edge is often different even when laser light irradiation is performed under the same conditions as when no adhesive is present. The reason is that if the adhesive is present, the strength is lowered, the energy required for fusing is consumed to dissolve the adhesive, the adhesive becomes a foreign substance, and the fusing is inhibited.
For this reason, when an adhesive is present between the stacked sheets at the site where the side seal portion is to be formed, the means (fusing that has been adopted as a means for adjusting the fusion strength with the adhesive present between the sheets). The relationship between the conditions for applying (adhesion strength adjustment) and the obtained fusion strength is investigated, and then the conditions of the means such as, for example, the difference in the fusion strength of the portions having different total number of laminated layers are reduced. It is preferable to finely adjust the output of the laser light, the scanning speed of the laser light, the width of the light passage portion, the height and width of the protrusion 45, and the like.
Moreover, in each embodiment mentioned above of the manufacturing method of the underpants type wearing article of this invention, the formation schedule of the side seal part in the strip | belt-shaped exterior body (diaper continuous body 10) of the state which accumulated the front body side and the back body side was piled up. Means for adjusting the fusion strength for each mode of the adhesive to be present in each part even when the adhesive is present between the sheets in the site and the mode in which the adhesive is present differs depending on the site where the total number of laminated sheets is different The relationship between the conditions for applying the means adopted (adhesion strength adjustment) and the resulting fusion strength is examined, and the results are used to reduce the difference in the fusion strength of the parts with different total number of layers. In addition, it is preferable to finely adjust the conditions of the means. More specifically, it is preferable to finely adjust the output of the laser beam, the scanning speed of the laser beam, the width of the light passing portion, the height of the protruding portion 45, the width of the protruding portion 45, and the like. The mode in which the adhesive is present differs depending on the part where the total number of laminated sheets is different. When the adhesive is present between the sheets in one part compared to each other and there is no adhesive between the sheets in the other part In the case where the adhesive is present over the entire area between the sheets in one part to be compared, while the adhesive is pattern coated between the sheets in the other part, the sheet in one part to be compared In the meantime, there is a case where an adhesive is present between all sheets, while an adhesive is present only between some sheets between the sheets in the other part.
　より具体例に説明すると、例えば、図５に示すように、帯状の外装体３の搬送方向に沿う両側部３ａ，３ａを、吸収性本体２の長手方向両端部を覆うように折り返し、その折り返した部分を接着剤で対向面に固定した場合には、サイドシール部の形成予定部位における前述した８層構造部分３Ａは、シート間にその接着剤が存在する分、該８層構造部分にレーザー光を照射して形成するシール縁部に融着強度が得られにくくなる。
　例えば、このような場合には、８層構造部に照射するレーザー光の出力を、接着剤がない場合に比べて強めたり、レーザー光の走査速度を、接着剤がない場合に比べて遅くしたり、スリット状の開口部２７（光通過部）の幅広部５２の幅Ｗ１を、接着剤がない場合に比べて狭くしたり、突出部４５の高さを、接着剤がない場合に比べて高くしたり、突出部４５の幅を、接着剤がない場合に比べて狭くする。 More specifically, for example, as shown in FIG. 5, both side portions 3 a and 3 a along the conveying direction of the strip-shaped exterior body 3 are folded back so as to cover both longitudinal ends of the absorbent main body 2, and the folding is performed. When the portion is fixed to the opposite surface with an adhesive, the above-mentioned 8-layer structure portion 3A in the site where the side seal portion is to be formed is laser-exposed to the 8-layer structure portion because the adhesive exists between the sheets. It becomes difficult to obtain fusion strength at the seal edge formed by irradiating light.
For example, in such a case, the output of the laser beam applied to the eight-layer structure is increased compared to the case where no adhesive is present, or the scanning speed of the laser beam is decreased as compared to the case where no adhesive is present. Or the width W1 of the wide portion 52 of the slit-shaped opening 27 (light passage portion) is narrower than when no adhesive is present, or the height of the protrusion 45 is smaller than when no adhesive is present. The width of the protrusion 45 is made narrower than that in the case where there is no adhesive.
　また、本発明においては、前記サイドシール部形成工程における外装体の分断及び接合部の形成は、熱源を用いて該外装体を溶融することにより実施すれば良い。熱源を用いた外装体の溶融は、前述の如き、外装体へのレーザー光の照射に制限されず、非接触熱源として、赤外線やハロゲン光を用いてもよく、それ以外の他の方法、例えば、公知のヒートロール装置等を用いた外装体の加熱圧着、あるいは公知の超音波振動装置等を用いた外装体への超音波振動の付与、等により実施することもできる。
　また、前記サイドシール部形成工程における外装体の分断及び接合部の形成は、同時でもよく、接合部の形成後に分断してもよい。 Moreover, in this invention, what is necessary is just to implement the division | segmentation of an exterior body in the said side seal part formation process, and formation of a junction part by melting this exterior body using a heat source. As described above, the melting of the outer package using the heat source is not limited to the laser beam irradiation to the outer package, and as a non-contact heat source, infrared or halogen light may be used. It can also be carried out by thermocompression bonding of the exterior body using a known heat roll device or the like, or applying ultrasonic vibration to the exterior body using a known ultrasonic vibration device or the like.
Moreover, the division | segmentation of an exterior body and formation of a junction part in the said side seal part formation process may be simultaneous, and may be divided after formation of a junction part.
　以上、本発明をその実施態様に基づいて説明したが、本発明は、上述した実施態様に制限されることなく適宜変更が可能である。 As mentioned above, although this invention was demonstrated based on the embodiment, this invention can be changed suitably, without being restrict | limited to the embodiment mentioned above.
　例えば、本発明のパンツ型着用物品（例えばパンツ型使い捨ておむつ）は、前身頃Ｆの外装体と後身頃Ｒの外装体とが、図１５に示す各態様で重ねられた４～８層構造部分を有するものであっても良い。
　図１５（ａ）に示すパンツ型着用物品は、前身頃Ｆの外装体と後身頃Ｒの外装体とが重ね合わされた部分に、６層構造部分３Ａ（合計積層枚数が最も多い高積層部分）と４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂとを有しており、一対のサイドシール部（図示せず）に形成されたシール縁部は、６層構造部分３Ａと４層構造部分３Ｂとで、融着強度が等しくなっている。 For example, a pants-type wearing article (for example, a pants-type disposable diaper) according to the present invention has a 4- to 8-layer structure portion in which an outer body of a front body F and an outer body of a rear body R are overlapped in each mode shown in FIG. It may have.
The pants-type wearing article shown in FIG. 15 (a) has a 6-layer structure portion 3A (a highly laminated portion having the largest total number of laminated layers) on a portion where the outer body of the front body F and the outer body of the rear body R are overlapped. And a four-layer structure portion (low lamination portion having the smallest total number of laminated sheets) 3B, and seal edges formed on a pair of side seal portions (not shown) are formed into six-layer structure portions 3A and 4A. The layer structure portion 3B has the same fusion strength.
　前述した第１実施態様においては、前記重合加圧工程の実施前に、図５に示すように、帯状の外装体３の搬送方向に沿う両側部３ａ，３ａ、即ち、帯状の外層シート３１及び帯状の内層シート３２それぞれの搬送方向に沿う両側部を、吸収性本体２の長手方向両端部を覆うように折り返していたが、図１５（ａ）に示すパンツ型着用物品を製造する場合には、帯状の外層シート３１として、帯状の内層シート３２よりも幅方向（長手方向と直交する方向）の長さが長いものを用い、両シート３１，３２を重ね合わせたときに内層シート３２の側縁から外方に延出する、外層シート３１の延出部のみを、吸収性本体２の長手方向両端部を覆うように折り返す。その場合、おむつ連続体１０の分断予定部分１０Ｃは、ウエスト開口部８の開口端部及びその近傍が、６枚のシートが重ねられた６層構造部分、それ以外の部分が、４枚のシートが重ねられた４層構造部分となる。 In the first embodiment described above, before the polymerization pressurizing step, as shown in FIG. 5, both side portions 3a, 3a along the conveying direction of the strip-shaped outer package 3, that is, the strip-shaped outer layer sheet 31 and When both sides along the conveyance direction of each belt-shaped inner layer sheet 32 are folded back so as to cover both ends in the longitudinal direction of the absorbent main body 2, The belt-like outer layer sheet 31 is longer than the belt-like inner layer sheet 32 in the width direction (direction perpendicular to the longitudinal direction), and the side of the inner layer sheet 32 when the sheets 31 and 32 are overlapped. Only the extension part of the outer layer sheet 31 that extends outward from the edge is folded back so as to cover both longitudinal ends of the absorbent main body 2. In that case, the parting plan part 10C of the diaper continuous body 10 is a six-layer structure part in which the opening end part of the waist opening part 8 and its vicinity are overlapped with six sheets, and the other part is four sheets. Becomes a four-layer structure part.
　図１５（ｂ）に示すパンツ型着用物品は、前身頃Ｆの外装体と後身頃Ｒの外装体とが重ね合わされた部分に、８層構造部分（合計積層枚数が最も多い高積層部分）３Ａと６層構造部分（合計積層枚数が中間の中積層部分）３Ｃと４層構造部分（合計積層枚数が最も少ない低積層部分）３Ｂとを有しており、一対のサイドシール部（図示せず）に形成されたシール縁部は、８層構造部分３Ａと６層構造部分３Ｃと４層構造部分３Ｂとで、融着強度が等しくなっている。
　図１５（ｃ）に示すパンツ型着用物品は、前身頃Ｆの外装体と後身頃Ｒの外装体とが重ね合わされた部分に、４層構造部分３Ｄと６層構造部分３Ｅと第２の４層構造部分３Ｂとを有しており、一対のサイドシール部（図示せず）に形成されたシール縁部は、４層構造部分３Ｄと６層構造部分３Ｅと第２の４層構造部分３Ｂとで、融着強度が等しくなっている。 The pants-type wearing article shown in FIG. 15 (b) has an eight-layer structure portion (a highly laminated portion having the largest total number of laminated layers) 3A on the portion where the outer body of the front body F and the outer body of the rear body R are overlapped. And a 6-layer structure portion (intermediate laminated portion with a total number of laminated layers) 3C and a 4-layer structure portion (low laminated portion with the smallest total number of laminated layers) 3B, and a pair of side seal portions (not shown) The sealing edge portion formed in (8) has the same fusion strength in the 8-layer structure portion 3A, the 6-layer structure portion 3C, and the 4-layer structure portion 3B.
The pants-type wearing article shown in FIG. 15 (c) has a four-layer structure portion 3 </ b> D, a six-layer structure portion 3 </ b> E, and a second 4 on the portion where the outer body of the front body F and the outer body of the rear body R are overlapped. The seal edge portion formed in the pair of side seal portions (not shown) includes a four-layer structure portion 3D, a six-layer structure portion 3E, and a second four-layer structure portion 3B. Thus, the fusion strength is equal.
　図１５に示す各実施形態のパンツ型着用物品は、第１実施態様の製造方法において、レーザー光の出力を、シートの積層数が多い部分ほど弱く照射することによって製造することができ、また、第１実施態様の製造方法において、レーザー光の走査速度を、シートの積層数が多い部分ほど高速とすることによっても製造することができる。
　また、図１５（ａ）に示す実施形態のパンツ型着用物品は、第２実施態様の製造方法において、幅広部と幅狭部との幅の比を代える以外は、第２実施形態の製造方法と同様にして製造することができ、また、第３実施態様の製造方法において、高位部と低位部の高低差を代える以外は、第３実施形態の製造方法と同様にして製造することができる。
　図１５（ａ）及び図１５（ｂ）に示す各実施形態のパンツ型着用物品は、第２又は第３実施態様の製造方法において、幅広部及び幅狭部に加えてそれらの中間の幅を有する中間幅部を有する光通過部を用いたり、高位部及び低位部に加えてそれらの中間の高さを有する中位部を有する支持部材を用いることによっても製造することができる。 The pants-type wearing article of each embodiment shown in FIG. 15 can be manufactured by irradiating the output of laser light weakly as the number of stacked sheets increases in the manufacturing method of the first embodiment. In the manufacturing method of the first embodiment, the laser beam scanning speed can also be increased by increasing the number of stacked sheets in a portion.
Moreover, the underpants type wearing article of embodiment shown to Fig.15 (a) is the manufacturing method of 2nd Embodiment except changing the ratio of the width | variety of a wide part and a narrow part in the manufacturing method of 2nd embodiment. In addition, in the manufacturing method of the third embodiment, the manufacturing method of the third embodiment can be manufactured in the same manner as the manufacturing method of the third embodiment except that the height difference between the high-order part and the low-order part is changed. .
In the manufacturing method of the second or third embodiment, the pants-type wearing article of each embodiment shown in FIGS. 15 (a) and 15 (b) has an intermediate width in addition to the wide portion and the narrow portion. It can also be manufactured by using a light passage part having an intermediate width part, or using a support member having a middle part having an intermediate height in addition to the high part and the low part.
　また、上述した本発明の第３実施態様の製造方法においては、外装体が接する外面における光通過部の近傍に、突出部の突出高さが光通過部の長手方向に沿って非連続的に変化する支持部材を用いて、シール縁部の融着強度の差を低下させたが、これに代えて、外装体が接する外面における光通過部の近傍に、光通過部の近傍に形成した突出部の幅が光通過部の長手方向に沿って非連続的に変化する支持部材を用いて、シール縁部の融着強度の差を低下させることもできる。 In the manufacturing method of the third embodiment of the present invention described above, the protrusion height of the protrusion is discontinuously along the longitudinal direction of the light passage in the vicinity of the light passage on the outer surface in contact with the exterior body. By using a changing support member, the difference in the fusion strength of the seal edge portion was reduced. Instead, a protrusion formed in the vicinity of the light passage portion in the vicinity of the light passage portion on the outer surface in contact with the exterior body. By using a support member in which the width of the portion changes discontinuously along the longitudinal direction of the light passage portion, the difference in the fusion strength of the seal edge portion can be reduced.
　また、おむつ連続体１０を円筒ロール２３（支持部材２１）に皴やたるみを発生させずに巻き掛けるために、レーザー式接合装置２０に、おむつ連続体１０のテンションを制御する機構を具備させても良い。 Moreover, in order to wind the diaper continuous body 10 around the cylindrical roll 23 (support member 21) without generating wrinkles or slack, the laser-type bonding apparatus 20 is provided with a mechanism for controlling the tension of the diaper continuous body 10. Also good.
　また、前記実施形態（態様）における外装体３は、図４に示すように、腹側部１Ａと背側部１Ｂとで分割されずに、腹側部１Ａ、股下部１Ｃ及び背側部１Ｂに亘る砂時計状等の連続した形状を有していたが、本発明における外装体は、このような連続した形状に制限されず、例えば、着用者の腹側（前側）に配される腹側シート部材と、着用者の背側（後側）に配される背側シート部材とに分割されており、吸収性本体がこれら両シート部材に架け渡して固定されていても良い。このような分割タイプの外装体を具備するパンツ型使い捨ておむつの製造方法における前記重合加圧工程は、吸収性本体が固定された帯状の外装体の前身頃側（帯状の腹側シート部材）と後身頃側（帯状の背側シート部材）とが重ね合わされた構成を有する帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする。分割タイプの外装体を具備するパンツ型使い捨ておむつ等のパンツ型着用物品も、股下部及びその前後に延在する腹側部及び背側部に区分でき、前記腹側シート部材は、着用時に着用者の腹側に配される前記腹側部に配され、前記背側シート部材は、着用時に着用者の背側に配される前記背側部に配されている。そして、その背側シート部材と腹側シート部材とが、パンツ型着用物品の左右両側部において互いに接合されて一対のサイドシール部が形成されている。 Further, as shown in FIG. 4, the exterior body 3 in the embodiment (mode) is not divided into the abdominal part 1A and the dorsal part 1B, but the abdominal part 1A, the crotch part 1C, and the dorsal part 1B. However, the exterior body in the present invention is not limited to such a continuous shape, and is, for example, the stomach side disposed on the wearer's stomach side (front side). It is divided | segmented into the sheet | seat member and the back | dorsal sheet | seat member distribute | arranged to a wearer's back | dorsal side (rear side), and the absorptive main body may be bridge | crossed and fixed to these both sheet | seat members. In the method for producing a pants-type disposable diaper having such a split-type exterior body, the polymerization pressurizing step includes a front body side (a belt-like stomach side sheet member) of the belt-like exterior body to which the absorbent main body is fixed. A site where the side seal portion is to be formed in the belt-shaped exterior body having a configuration in which the back body side (band-shaped backside sheet member) is superimposed is brought into a pressurized state. Pants-type wearing articles such as pants-type disposable diapers with a split-type exterior body can also be divided into a crotch part and an abdominal side part and a back side part extending in front and rear thereof, and the abdominal sheet member is worn when worn It arrange | positions to the said stomach side part distribute | arranged to a person's stomach side, and the said back | dorsal sheet | seat member is distribute | arranged to the said back side part distribute | arranged to a wearer's back side at the time of wear. And the back side sheet | seat member and the abdominal side sheet | seat member are mutually joined in the right-and-left both sides of a pants type wearing article, and a pair of side seal part is formed.
　また、本発明におけるパンツ型着用物品は、パンツ型使い捨ておむつに限られず、パンツ型の生理用ナプキンであっても良く、また、着用物品の外面を形成する外装体を具備する一方、吸収性本体を具備しない、おむつカバー等であっても良い。
　上述した一の実施形態における説明省略部分及び一の実施形態のみが有する要件は、それぞれ他の実施形態に適宜適用することができ、また、各実施形態における要件は、適宜、実施形態間で相互に置換可能である。 In addition, the pant-type wearing article in the present invention is not limited to a pant-type disposable diaper, and may be a pant-type sanitary napkin. It may be a diaper cover or the like that does not include
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.
　前述した本発明の実施形態（態様）に関し、更に以下の付記（パンツ型着用物品、パンツ型着用物品の製造方法）を開示する。 The following additional notes (pants-type wearing articles, methods for producing pants-type wearing articles) are further disclosed with respect to the embodiment (aspects) of the present invention described above.
＜１＞
　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型着用物品であって、
　前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を形成してなり、
　前記シール縁部は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に形成されており、
　前記シール縁部は、前記複数の部位における融着強度が等しいパンツ型着用物品。 <1>
An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body A pants-type wearing article in which a part is formed,
The side seal portion includes a seal edge portion in which the edge portion of the exterior body in the front body and the edge portion of the exterior body in the back body are joined by a continuous linear fusion portion extending in the longitudinal direction of the side seal portion. Formed,
The seal edge is formed in a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side are different from each other,
The seal edge portion is a pants-type wearing article having the same fusion strength at the plurality of portions.
＜２＞
　前記外装体は、着用物品の外面を形成する外層シートと、該外層シートの内面側に配された内層シートと、両シート間に接着剤により固定された複数本の糸状又は帯状の弾性部材とを含んで構成されている、前記＜１＞記載のパンツ型着用物品。
＜３＞
　前記外層シートと、前記内層シートの間に、ウェストギャザーを形成するウエスト部弾性部材、胴回りギャザーを形成する胴回り部弾性部材及びレッグギャザーを形成するレッグ部弾性部材が、所定の伸長率に伸長させた伸長状態で各々複数本配されている、前記＜２＞記載のパンツ型着用物品。
＜４＞
　前身頃における外装体及び後身頃における外装体が、ウェストギャザーを形成するウエスト部弾性部材又は胴回りギャザーを形成する胴回り部弾性部材を含み、サイドシール部を挟む両側それぞれにおける外装体を構成するシート間に、前記ウエスト部弾性部材又は前記胴回り部弾性部材が接着剤を介して固定されている、前記＜２＞又は＜３＞に記載のパンツ型着用物品。
＜５＞
　前記外装体は、樹脂材を含み、該樹脂材を主成分として形成されている、前記＜１＞～＜４＞の何れか１に記載のパンツ型着用物品。
＜６＞
　前記外装体を構成する前記シートは、不織布、フィルム、又は不織布とフィルムとのラミネートシートである、前記＜１＞～＜５＞の何れか１に記載のパンツ型着用物品。
＜７＞
　前記サイドシール部が延びる方向と直交する断面において、前記シール縁部の外縁には、前記外装体を構成するシートどうしの融着部が形成され、該融着部は、該外装体の厚み方向の中央部が両端部に比して幅が広い、前記＜１＞～＜６＞の何れか１に記載のパンツ型着用物品。
＜８＞
　前記サイドシール部が延びる方向と直交する断面において、前記シール縁部の外縁は、着用物品の内方に向かって凸の弧状をなし、且つ該外縁を含んでそれよりも着用物品の内方に、前記外装体を構成するシートどうしの融着部が形成され、該融着部は、該外装体の厚み方向の中央部が両端部に比して幅が広い、前記＜１＞～＜６＞の何れか１に記載のパンツ型着用物品。
＜９＞
　前記複数の部位として、８枚又は６枚のシートが重ねられた８又は６層構造部分と、４枚のシートが重ねられた４層構造部分とを備えている、前記＜１＞～＜８＞の何れか１に記載のパンツ型着用物品。
＜１０＞
　前記複数の部位として、ウエスト開口部の開口端部及びその近傍が８枚のシートが重ねられた８層構造部分、それ以外の部分が、４枚のシートが重ねられた４層構造部分となっている、前記＜１＞～＜９＞の何れか１に記載のパンツ型着用物品。
＜１１＞
　パンツ型着用物品の幅方向中央部における８層構造部分は、前記外装体の両側部が、吸収性本体の長手方向両端部を覆うように折り返されている、前記＜１＞～＜１０＞の何れか１に記載のパンツ型着用物品。 <2>
The exterior body includes an outer layer sheet that forms an outer surface of a worn article, an inner layer sheet that is disposed on the inner surface side of the outer layer sheet, and a plurality of thread-like or belt-like elastic members that are fixed between the two sheets with an adhesive. The underpants-type wearing article according to the above <1>, comprising:
<3>
Between the outer layer sheet and the inner layer sheet, a waist elastic member forming a waist gather, a waist elastic member forming a waist gather, and a leg elastic member forming a leg gather are stretched to a predetermined elongation rate. The underpants-type wearing article according to the above <2>, wherein a plurality of each are arranged in a stretched state.
<4>
Between the sheets constituting the exterior body on each of both sides sandwiching the side seal portion, the exterior body in the front body and the exterior body in the back body include a waist elastic member forming a waist gather or a waist elastic member forming a waist gather The pants-type wearing article according to <2> or <3>, wherein the waist elastic member or the waist elastic member is fixed via an adhesive.
<5>
The pants-type wearing article according to any one of <1> to <4>, wherein the exterior body includes a resin material and is formed using the resin material as a main component.
<6>
The pants-type wearing article according to any one of <1> to <5>, wherein the sheet constituting the exterior body is a nonwoven fabric, a film, or a laminate sheet of a nonwoven fabric and a film.
<7>
In a cross section orthogonal to the direction in which the side seal portion extends, a fusion portion between sheets constituting the exterior body is formed on the outer edge of the seal edge portion, and the fusion portion is in the thickness direction of the exterior body. The pants-type wearing article according to any one of the above items <1> to <6>, wherein a central portion of the is wider than both ends.
<8>
In a cross section orthogonal to the direction in which the side seal portion extends, the outer edge of the seal edge portion has a convex arc shape toward the inside of the wearing article, and includes the outer edge and is further inward of the wearing article. <1> to <6, wherein a fusion part between sheets constituting the exterior body is formed, and the fusion part is wider at the center in the thickness direction of the exterior body than both ends. > The underpants type wearing article of any one of>.
<9>
<1> to <8, wherein the plurality of portions include an 8 or 6 layer structure portion in which 8 or 6 sheets are stacked, and a 4 layer structure portion in which 4 sheets are stacked. > The underpants type wearing article of any one of>.
<10>
As the plurality of portions, the opening end portion of the waist opening and the vicinity thereof are an eight-layer structure portion in which eight sheets are stacked, and the other portions are four-layer structure portions in which four sheets are stacked. The pants-type wearing article according to any one of <1> to <9>.
<11>
The eight-layer structure part in the center in the width direction of the pants-type wearing article has the above-described items <1> to <10>, wherein both side portions of the exterior body are folded back so as to cover both longitudinal ends of the absorbent main body. The underpants type wearing article of any one.
＜１２＞
　前記シール縁部は、前記合計積層枚数が相互に異なる複数の部位のそれぞれについて、融着強度が最大の部位の融着強度の値と融着強度が最小の部位の融着強度の値とが、それぞれ平均融着強度の値±３０％以内である、前記＜１＞～＜１１＞の何れか１に記載のパンツ型着用物品。
＜１３＞
　パンツ型着用物品の構成部材の色を、前記サイドシール部よりも腹側と背側とで異ならせる、前記＜１＞～＜１２＞の何れか１に記載のパンツ型着用物品。
＜１４＞
　前記パンツ型着用物品は、着用時に股下部に配される股下部並びにその縦方向の前後に位置する腹側部及び背側部を有し、
　パンツ型着用物品の腹側部と背側部とで、ウエスト部弾性部材、又は前記外装体を構成するシートの色が異なる、前記＜１＞～＜１３＞の何れか１に記載のパンツ型着用物品。
＜１５＞
　前記パンツ型着用物品は、着用時に股下部に配される股下部並びにその縦方向の前後に位置する腹側部及び背側部を有し、
　前記外装体は、腹側部、股下部及び背側部に亘る砂時計状の連続した形状を有する、前記＜１＞～＜１４＞の何れか１に記載のパンツ型着用物品。
＜１６＞
　前記パンツ型着用物品は、着用時に股下部に配される股下部並びにその縦方向の前後に位置する腹側部及び背側部を有し、
　前記外装体は、腹側部に配される腹側シート部材と、背側部に配される背側シート部材とに分割されており、吸収性本体がこれら両シート部材に架け渡して固定されている、前記＜１＞～＜１５＞の何れか１に記載のパンツ型着用物品。 <12>
The seal edge portion has a fusion strength value at a portion having the maximum fusion strength and a fusion strength value at a portion having the smallest fusion strength, for each of the plurality of portions where the total number of laminated layers is different from each other. The pants-type wearing article according to any one of <1> to <11>, wherein the average fusion strength value is within ± 30%.
<13>
The pant-type wearing article according to any one of the above items <1> to <12>, wherein the color of the constituent member of the pant-type wearing article is different between the ventral side and the back side than the side seal portion.
<14>
The pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
The underpants type according to any one of the above items <1> to <13>, wherein the color of the waist part elastic member or the sheet constituting the exterior body is different between the ventral part and the back part of the pant-type wearing article Wearing articles.
<15>
The pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
The pants-type wearing article according to any one of <1> to <14>, wherein the exterior body has an hourglass-like continuous shape extending from the abdominal side, the crotch part, and the back side.
<16>
The pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
The exterior body is divided into an abdominal sheet member disposed on the abdominal side part and a back sheet member disposed on the back side part, and the absorbent main body is bridged and fixed to both the sheet members. The pants-type wearing article according to any one of <1> to <15>.
＜１７＞
　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法であって、
　前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、
　加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備し、
　前記帯状の外装体は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる部位を有しており、
　前記サイドシール部形成工程においては、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に、前記レーザー光を、該部位毎に出力又は走査速度を異ならせて照射し、各部位に形成されるシール縁部の融着強度を等しくする、パンツ型着用物品の製造方法。
＜１８＞
　前記光通過部の長手方向に沿って直線的に走査させて、サイドシール部の形成予定部位にレーザー光を照射する際、合計積層枚数が最も多い高積層部分にレーザー光を照射している間のレーザー光の出力値を、合計積層枚数が最も少ない低積層部分に照射する間の出力値に比べて低下させる、前記＜１７＞記載のパンツ型着用物品の製造方法。
＜１９＞
　前記光通過部の長手方向に沿って直線的に走査させて、サイドシール部の形成予定部位にレーザー光を照射する際、合計積層枚数が最も多い高積層部分にレーザー光を照射している間のレーザー光の走査速度を、合計積層枚数が最も少ない低積層部分に照射する間の走査速度に比べて高速とする、前記＜１８＞記載のパンツ型着用物品の製造方法。 <17>
An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body The side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part. A method for producing a pants-type wearing article having a seal edge bonded at
A polymerization pressurizing step for pressing the formation planned site of the side seal part in the belt-shaped exterior body in a state where the front body side and the back body side are overlapped; and
While cutting the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body to the formation planned site of the side seal portion in a pressurized state And a side seal part forming step for forming the seal edge by fusing the cut edges of the laminated exterior body produced by the division,
The strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
In the side seal portion forming step, the laser beam is applied to a plurality of portions where the total number of laminated sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side is different from each other. A method for manufacturing a pants-type wearing article, in which irradiation is performed at different output or scanning speeds to equalize the fusion strength of the seal edge formed at each part.
<18>
While irradiating the laser beam to the formation part of the side seal part by linearly scanning along the longitudinal direction of the light passage part, while irradiating the laser beam to the high lamination part with the largest total number of laminations The method for producing a pants-type wearing article according to <17>, wherein the output value of the laser beam is reduced as compared with the output value during irradiation of the low lamination portion having the smallest total number of laminations.
<19>
While irradiating the laser beam to the formation part of the side seal part by linearly scanning along the longitudinal direction of the light passage part, while irradiating the laser beam to the high lamination part with the largest total number of laminations The method for producing a pants-type wearing article according to <18>, wherein the scanning speed of the laser beam is higher than the scanning speed during irradiation of the low-lamination portion having the smallest total number of laminations.
＜２０＞
　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法であって、
　前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、
　加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備し、
　前記帯状の外装体は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる部位を有しており、
　前記サイドシール部形成工程においては、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に、前記レーザー光を、該部位毎に幅が異なる光通過部を介して照射し、各部位に形成されるシール縁部の融着強度を等しくする、パンツ型着用物品の製造方法。
＜２１＞
　前記光通過部は、パンツ型着用物品の連続体又は帯状の外装体のサイドシール部の形成予定部位のうち、合計積層枚数が最も多い高積層部分と重なる部分に幅広部を有し、合計積層枚数が最も少ない低積層部分と重なる部分に、幅広部より幅が狭い幅狭部を有している、前記＜２０＞記載のパンツ型着用物品の製造方法。
＜２２＞
　前記幅広部の幅Ｗ１に対する前記幅狭部５３の幅Ｗ２の比（Ｗ２／Ｗ１）は、好ましくは０．０２５以上、より好ましくは０．０５以上であり、また、好ましくは０．９以下であり、より好ましくは０．８５以下であり、また、好ましくは０．０２５～０．９、より好ましくは０．０５～０．８５である、前記＜２１＞記載のパンツ型着用物品の製造方法。
＜２３＞
　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法であって、
　前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、
　加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備し、
　前記帯状の外装体は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる部位を有しており、
　前記サイドシール部形成工程においては、前記帯状の外装体が接する外面における前記光通過部の近傍に、該外装体側に突出する突出部を有し、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位毎に、該突出部の突出高さ又は幅が異なる支持部材を用いて、該各部位にレーザー光の照射を行い、該各部位に形成されるシール縁部の融着強度を等しくする、パンツ型着用物品の製造方法。
＜２４＞
　前記サイドシール部の形成予定部位におけるシート間に、接着剤が存在するか否か又は接着剤が存在する態様に応じて、前記合計積層枚数が異なる部位の融着強度の差を調整する手段として採用した手段を微調整する、前記＜１７＞～＜２３＞の何れか１に記載のパンツ型着用物品の製造方法。
＜２５＞
　前記サイドシール部の形成予定部位のうちの合計積層枚数が最も少ない低積層部分については、前記支持部材における、前記光通過部を挟んだ両側の高位部で強く押さえた状態で、レーザー光を照射し、合計積層枚数が最も多い高積層部分については、該支持部材における、該光通過部を挟んだ両側の低位部で高位部よりも弱く押さえた状態で、レーザー光を照射する、前記＜２３＞又は＜２４＞記載のパンツ型着用物品の製造方法。
＜２６＞
　前記低位部は、前記高位部との高低差が、好ましくは０．１ｍｍ以上、更に好ましくは０．２ｍｍ以上、そして、好ましくは５ｍｍ以下、更に好ましくは４ｍｍ以下、より具体的には、好ましくは０．１ｍｍ以上５ｍｍ以下、更に好ましくは０．２ｍｍ以上４ｍｍ以下である、前記＜２５＞記載のパンツ型着用物品の製造方法。 <20>
An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body The side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part. A method for producing a pants-type wearing article having a seal edge bonded at
A polymerization pressurizing step for pressing the formation planned site of the side seal part in the belt-shaped exterior body in a state where the front body side and the back body side are overlapped; and
While cutting the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body to the formation planned site of the side seal portion in a pressurized state And a side seal part forming step for forming the seal edge by fusing the cut edges of the laminated exterior body produced by the division,
The strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
In the side seal portion forming step, the laser beam is applied to a plurality of portions where the total number of laminated sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side is different from each other. A method for manufacturing a pants-type wearing article, in which irradiation is performed through light passing portions having different widths to equalize the fusion strength of the seal edge formed at each portion.
<21>
The light passing portion has a wide portion in a portion overlapping a highly laminated portion having the largest total number of laminated layers, among the planned formation portions of the side seal portion of the continuous body of the pants-type wearing article or the belt-shaped exterior body, and the total laminated portion The manufacturing method of the underpants type wearing article as described in said <20> which has a narrow part narrower than a wide part in the part which overlaps with the low lamination | stacking part with the few number of sheets.
<22>
The ratio (W2 / W1) of the width W2 of the narrow portion 53 to the width W1 of the wide portion is preferably 0.025 or more, more preferably 0.05 or more, and preferably 0.9 or less. More preferably 0.85 or less, and preferably 0.025 to 0.9, more preferably 0.05 to 0.85. The method for producing a pants-type wearing article according to the above <21> .
<23>
An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body The side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part. A method for producing a pants-type wearing article having a seal edge bonded at
A polymerization pressurizing step for pressing the formation planned site of the side seal part in the belt-shaped exterior body in a state where the front body side and the back body side are overlapped; and
While cutting the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body to the formation planned site of the side seal portion in a pressurized state And a side seal part forming step for forming the seal edge by fusing the cut edges of the laminated exterior body produced by the division,
The strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
In the side seal portion forming step, a sheet and a rear portion of the front body side exterior body having a projecting portion projecting toward the exterior body side in the vicinity of the light passage portion on the outer surface in contact with the belt-shaped exterior body For each of a plurality of portions where the total number of laminated sheets constituting the body-side exterior body is different from each other, a laser beam is irradiated to each portion using a support member having a different protruding height or width of the protruding portion. The manufacturing method of the underpants type wearing article which makes equal the fusion | melting strength of the seal edge part formed in this each site | part.
<24>
As a means for adjusting the difference in the fusion strength of the portions where the total number of stacked layers is different depending on whether or not an adhesive is present between sheets at the site where the side seal portion is to be formed. The method for producing a pants-type wearing article according to any one of <17> to <23>, wherein the adopted means is finely adjusted.
<25>
The low-lamination portion with the smallest total number of laminated layers among the portions where the side seal portion is to be formed is irradiated with laser light in a state where it is strongly pressed by the high-order portions on both sides of the light passing portion of the support member. Then, the high lamination portion having the largest total number of laminated sheets is irradiated with laser light in a state where it is held weaker than the high portion at the lower portion on both sides of the light passing portion of the support member, <23 > Or <24> The manufacturing method of the underpants type wearing article.
<26>
The height difference between the low-order part and the high-order part is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically preferably The manufacturing method of the underpants type wearing article as described in said <25> which is 0.1 mm or more and 5 mm or less, More preferably, it is 0.2 mm or more and 4 mm or less.
＜２７＞
　原反ロールから連続的に供給される前記外装体を構成する帯状の外層シートと、原反ロールから連続的に供給される該外装体を構成する帯状の内層シートの間に、ウェストギャザーを形成するウエスト部弾性部材、胴回りギャザーを形成する胴回り部弾性部材及びレッグギャザーを形成するレッグ部弾性部材を、所定の伸長率に伸長させた伸長状態で各々複数本配する、前記＜１７＞～＜２６＞の何れか１に記載のパンツ型着用物品の製造方法。
＜２８＞
　一対のニップロールの間に、ウエスト部弾性部材、胴回り部弾性部材及びレッグ部弾性部材を伸長状態で挟み込んだ帯状の外層シート及び帯状の内層シートを送り込んで加圧することにより、該帯状シート間に複数本の弾性部材が伸長状態で配された帯状の前記外装体を形成する、前記＜１７＞～＜２７＞の何れか１に記載のパンツ型着用物品の製造方法。
＜２９＞
　前記外装体を構成する帯状の外層シート及び帯状の内層シートには、それらを重ね合わせる前に、両シートの何れか一方又は双方の対向する面の所定部位に、接着剤塗工機によりホットメルト型接着剤を塗工する、前記＜１７＞～＜２８＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３０＞
　ウエスト部弾性部材、胴回り部弾性部材等の弾性部材が、前記外装体を構成する帯状の外層シート及び該外装体を構成する帯状の内層シートにおける、レーザー光の照射によって分断される分断予定部分を跨ぐように伸長状態で配されている場合、該分断予定部分及びその近傍に接着剤を塗工しておく、前記＜１７＞～＜２９＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３１＞
　ウエスト部弾性部材及び胴回り部弾性部材には、前記外装体を構成する帯状の外層シート及び該装体を構成する帯状の内層シート間に配される前に、接着剤塗工機によりホットメルト型接着剤を間欠的に塗工する、前記＜１７＞～＜３０＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３２＞
　前記外装体を構成する帯状の外層シート及び該外装体を構成する帯状の内層シートにおける、レーザー光の照射によって分断される分断予定部分に存在する弾性部材は、前記サイドシール部形成工程前に切断するか、又は、該サイドシール部形成工程におけるレーザー光の照射により切断する、前記＜１７＞～＜３１＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３３＞
　レーザー光の照射によって分断される分断予定部分及びその近傍における互いに重なり合う前記外装体を構成する外層シート及び該外装体を構成する内層シートの２枚のシート間は、レーザー光の照射前において、全く接合されていない、前記＜１７＞～＜３２＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３４＞
　帯状の前記外装体をその幅方向に折り畳むことにより、吸収性本体が固定された帯状の該外装体の前身頃側と後身頃側とを重ね合わせ、サイドシール部が形成されていないパンツ型着用物品の前駆体が一方向に連なってなる、パンツ型着用物品の連続体を製造する、前記＜１７＞～＜３３＞の何れか１に記載のパンツ型着用物品の製造方法。 <27>
A waist gather is formed between the belt-like outer layer sheet constituting the outer package continuously supplied from the raw fabric roll and the belt-shaped inner layer sheet constituting the outer package continuously supplied from the raw roll. A plurality of the waist elastic members, the waist elastic members forming the waist gathers, and the leg elastic members forming the leg gathers in a stretched state stretched to a predetermined stretch rate. 26> The manufacturing method of the underpants type wearing article of any one of 26>.
<28>
By feeding and pressing a belt-like outer layer sheet and a belt-like inner layer sheet sandwiching a waist elastic member, a waistline elastic member, and a leg elastic member in a stretched state between a pair of nip rolls, a plurality of pieces are provided between the belt-like sheets. The method for producing a pants-type wearing article according to any one of the above <17> to <27>, wherein the strip-shaped exterior body in which an elastic member is arranged in an extended state is formed.
<29>
The belt-like outer layer sheet and the belt-like inner layer sheet constituting the exterior body are hot-melted with an adhesive coating machine on a predetermined portion of one or both of the opposite surfaces of the two sheets before being overlapped. The method for producing a pants-type wearing article according to any one of <17> to <28>, wherein a mold adhesive is applied.
<30>
The elastic member such as the waist elastic member, the waist elastic member, and the like in the band-shaped outer layer sheet constituting the outer package and the portion to be divided by the laser beam irradiation in the band-shaped inner layer sheet constituting the outer package In the case where the pants-type wearing article according to any one of the above items <17> to <29> is applied, an adhesive is applied to the portion to be divided and the vicinity thereof when the stretched portion is arranged so as to straddle Method.
<31>
The waist part elastic member and the waistline part elastic member are hot melt type by an adhesive coating machine before being arranged between the belt-like outer layer sheet constituting the exterior body and the belt-like inner layer sheet constituting the body. The method for producing a pants-type wearing article according to any one of <17> to <30>, wherein the adhesive is intermittently applied.
<32>
In the belt-shaped outer layer sheet constituting the exterior body and the belt-shaped inner layer sheet constituting the exterior body, an elastic member present in a portion to be divided that is divided by laser light irradiation is cut before the side seal portion forming step. Or the method for producing a pants-type wearing article according to any one of <17> to <31>, wherein the article is cut by laser light irradiation in the side seal portion forming step.
<33>
Between the two sheets of the outer layer sheet constituting the outer package and the inner layer sheet constituting the outer package, which overlap each other in the vicinity of the part to be divided by the laser beam irradiation, before the laser beam irradiation, The method for producing a pants-type wearing article according to any one of <17> to <32>, wherein the article is not joined.
<34>
By folding the belt-shaped exterior body in the width direction, the front body side and the back body side of the belt-shaped exterior body to which the absorbent main body is fixed are overlapped, and the pants-type wear in which the side seal part is not formed The method for producing a pant-type wearing article according to any one of the above <17> to <33>, wherein a continuous body of the pant-type wearing article, in which a precursor of the article is continuous in one direction.
＜３５＞
　前記サイドシール部形成工程は、レーザー式接合装置を用いてレーザー光を照射して一対のサイドシール部を形成する、前記＜１７＞～＜３４＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３６＞
　前記レーザー式接合装置は、回転駆動される中空の円筒ロールと、該円筒ロールの中空部に配され、該円筒ロールの周面部を形成する環状の支持部材に向けてレーザー光を照射する照射ヘッドと、無端状の加圧ベルトを備えたベルト式加圧装置と、環状の該支持部材の外周面に巻き掛ける該加圧ベルトの張力を増減調整できる張力調整機構とを備え、該張力の調整により、該支持部材と該加圧ベルトとによって、パンツ型着用物品の連続体に加える圧力を調整することができる、前記＜３５＞記載のパンツ型着用物品の製造方法。
＜３７＞
　前記支持部材は、レーザー光が通過可能な光通過部を有しており、
　前記光通過部として、前記支持部材を厚み方向に貫通するスリット状の開口部を有している、前記＜２３＞～＜３６＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３８＞
　前記支持部材は、前記光通過部ではレーザー光を通過させる一方、前記光通過部以外の部分ではレーザー光を通過させない、前記＜２３＞～＜３７＞の何れか１に記載のパンツ型着用物品の製造方法。
＜３９＞
　前記支持部材は、被加工物との当接面に凹部を有しており、該凹部は、円筒状の該支持部材の周方向に所定間隔を置いて複数形成されており、隣接する２つの凹部間に位置する領域に、スリット状の前記光通過部が形成されている、前記＜２３＞～＜３８＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４０＞
　前記支持部材及び加圧ベルトは、空冷、水冷等により温度を所定の温度範囲に維持する、前記＜２３＞～＜３９＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４１＞
　パンツ型着用物品の連続体は、一方の面が支持部材に当接し且つサイドシール部の形成予定部位が前記光通過部上に位置するように、回転する支持部材上に導入されると共に、他方の面に加圧ベルト又はその他の押さえ部材が押し付けられることによって、搬送されつつ厚み方向に加圧される、前記＜２３＞～＜４０＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４２＞
　搬送中且つ加圧状態の分断予定部分に対して、支持部材側から前記光通過部を介してレーザー光を照射され、該レーザー光の照射点は、円筒ロールの周方向に任意に移動可能に構成されており、該光通過部の該周方向に沿った移動に追従して走査するように設定されていることにより、該光通過部上に位置する該分断予定部分には、その搬送中に該レーザー光が一定時間連続的に照射される、前記＜２３＞～＜４１＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４３＞
　一回のレーザー光の照射で、帯状の前記外装体の分断と、その分断によって生じた２箇所の加圧状態にある該外装体の切断縁部どうしの融着とを同時に実施する、前記＜１７＞～＜４２＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４４＞
　前記外装体を構成する外層シート及び該外装体を構成する内層シートの切断縁部は、レーザー光の照射中及び照射終了直後は、発熱して溶融状態となっているが、レーザー光の照射によってパンツ型着用物品の連続体から切り分けられた１つの枚葉のおむつ前駆体及び該パンツ型着用物品の連続体それぞれの、支持部材と加圧ベルトとによる加圧状態が保持されたまま、照射終了後からは外気や支持部材・加圧ベルトへの伝熱によって速やかに冷却されて固化し、該切断縁部の形成材料が溶融一体化した融着部となる、前記＜２３＞～＜４３＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４５＞
　前記外装体を構成するシートが、合成樹脂製の不織布やフィルムであり、
　レーザー光として、ＣＯ2レーザー、ＹＡＧレーザー、ＬＤレーザー（半導体レーザー）、ＹＶＯ4レーザー、ファイバーレーザー等を用いる、前記＜１７＞～＜４４＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４６＞
　レーザー光としては、前記外装体を構成するシートが、合成樹脂として、ポリエチレン、ポリエチレンテレフタレート、ポリプロピレン等を含む場合、発振波長が８．０μｍ以上１５．０μｍ以下を用いる、前記＜１７＞～＜４５＞の何れか１に記載のパンツ型着用物品の製造方法。
＜４７＞
レーザー光としては、ＣＯ2レーザーの発振波長の９．０μｍ以上１１．０μｍ以下を用いる、前記＜１７＞～＜４６＞の何れか１に記載のパンツ型着用物品の製造方法。 <35>
The pants-type wearing article according to any one of <17> to <34>, wherein the side seal portion forming step forms a pair of side seal portions by irradiating a laser beam using a laser type bonding apparatus. Production method.
<36>
The laser-type bonding apparatus includes a hollow cylindrical roll that is driven to rotate, and an irradiation head that is disposed in a hollow portion of the cylindrical roll and irradiates laser light toward an annular support member that forms a peripheral surface portion of the cylindrical roll. And a belt type pressure device provided with an endless pressure belt, and a tension adjusting mechanism capable of adjusting the tension of the pressure belt wound around the outer peripheral surface of the annular support member to adjust the tension. The method for producing a pants-type wearing article according to <35>, wherein the pressure applied to the continuous body of the pants-type wearing article can be adjusted by the support member and the pressure belt.
<37>
The support member has a light passage part through which laser light can pass,
The method for producing a pant-type wearing article according to any one of the above <23> to <36>, wherein the light passing part has a slit-like opening that penetrates the support member in the thickness direction.
<38>
The pant-type wearing article according to any one of the above <23> to <37>, wherein the support member allows laser light to pass through the light passage portion, but does not allow laser light to pass through portions other than the light passage portion. Manufacturing method.
<39>
The support member has a recess in the contact surface with the workpiece, and a plurality of the recesses are formed at predetermined intervals in the circumferential direction of the cylindrical support member. The method for producing a pants-type wearing article according to any one of <23> to <38>, wherein the slit-shaped light passing portion is formed in a region located between the recesses.
<40>
The method for manufacturing a pants-type wearing article according to any one of <23> to <39>, wherein the support member and the pressure belt are maintained in a predetermined temperature range by air cooling, water cooling, or the like.
<41>
The continuous body of the pants-type wearing article is introduced on the rotating support member so that one surface abuts the support member and the side seal portion is to be formed on the light passage portion, and the other The method for producing a pants-type wearing article according to any one of the above <23> to <40>, wherein a pressure belt or other pressing member is pressed against the surface of the sheet to be pressed in the thickness direction while being conveyed. .
<42>
Laser beam is irradiated from the support member side through the light passing part to the part to be divided that is being transported and pressurized, and the irradiation point of the laser beam can be arbitrarily moved in the circumferential direction of the cylindrical roll By being configured to scan following the movement of the light passage portion along the circumferential direction, the part to be divided located on the light passage portion is being conveyed. The method for producing a pants-type wearing article according to any one of <23> to <41>, wherein the laser beam is continuously irradiated for a predetermined time.
<43>
The laser beam is irradiated once, and the strip-shaped exterior body is divided at the same time, and the fusion of the cut edges of the exterior body in two pressurized states generated by the division is performed. 17. The method for producing a pants-type wearing article according to any one of 17> to <42>.
<44>
The outer layer sheet constituting the outer package and the cut edge portion of the inner layer sheet constituting the outer package are heated and melted during the irradiation of the laser beam and immediately after the irradiation, but by the irradiation of the laser beam Irradiation is completed while the pressed state of the support member and the pressure belt of each of the diaper precursor of a single sheet cut from the continuous body of the pant-type wearing article and the continuous body of the pant-type wearing article is maintained. Thereafter, the material is quickly cooled and solidified by heat transfer to the outside air, the support member, and the pressure belt, thereby forming the fused portion in which the forming material of the cutting edge is melted and integrated, <23> to <43> The manufacturing method of the underpants type wearing article of any one of these.
<45>
The sheet constituting the exterior body is a synthetic resin nonwoven fabric or film,
The method for producing a pants-type wearing article according to any one of <17> to <44>, wherein a CO 2 laser, a YAG laser, an LD laser (semiconductor laser), a YVO 4 laser, a fiber laser, or the like is used as the laser light. .
<46>
As the laser light, when the sheet constituting the outer package includes polyethylene, polyethylene terephthalate, polypropylene, or the like as a synthetic resin, an oscillation wavelength of 8.0 μm to 15.0 μm is used. <17> to <45 > The manufacturing method of the underpants type wearing article of any one of>.
<47>
The method for producing a pants-type wearing article according to any one of <17> to <46>, wherein the laser light has a CO 2 laser oscillation wavelength of 9.0 μm to 11.0 μm.
　本発明によれば、柔軟性又は肌触りに優れたサイドシール部を有するとともに、サイドシール部の引き裂き易さにも優れているパンツ型着用物品が提供される。 According to the present invention, there is provided a pant-type wearing article that has a side seal portion that is excellent in flexibility or touch and that is also excellent in tearing of the side seal portion.

Claims (40)

  1. 　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型着用物品であって、
    　前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を形成してなり、
    　前記シール縁部は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に形成されており、
    　前記シール縁部は、前記複数の部位における融着強度が等しいパンツ型着用物品。     An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body A pants-type wearing article in which a part is formed,
    The side seal portion includes a seal edge portion in which the edge portion of the exterior body in the front body and the edge portion of the exterior body in the back body are joined by a continuous linear fusion portion extending in the longitudinal direction of the side seal portion. Formed,
    The seal edge is formed in a plurality of portions where the total number of stacked sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side are different from each other,
    The seal edge portion is a pants-type wearing article having the same fusion strength at the plurality of portions.
  2. 　前記シール縁部は、前記合計積層枚数が相互に異なる複数の部位のそれぞれについて、融着強度が最大の部位の融着強度の値と融着強度が最小の部位の融着強度の値とが、それぞれ平均融着強度の値±３０％以内である、請求項１に記載のパンツ型着用物品。 The seal edge portion has a fusion strength value at a portion having the maximum fusion strength and a fusion strength value at a portion having the smallest fusion strength, for each of the plurality of portions where the total number of laminated layers is different from each other. The pants-type wearing article according to claim 1, each having an average fusion strength value within ± 30%.
  3. 　前記外装体は、着用物品の外面を形成する外層シートと、該外層シートの内面側に配された内層シートと、両シート間に接着剤により固定された複数本の糸状又は帯状の弾性部材とを含んで構成されている、請求項１又は２に記載のパンツ型着用物品。 The exterior body includes an outer layer sheet that forms an outer surface of a worn article, an inner layer sheet that is disposed on the inner surface side of the outer layer sheet, and a plurality of thread-like or belt-like elastic members that are fixed between the two sheets with an adhesive. The underpants type wearing article of Claim 1 or 2 comprised including this.
  4. 　前身頃における外装体及び後身頃における外装体が、ウェストギャザーを形成するウエスト部弾性部材又は胴回りギャザーを形成する胴回り部弾性部材を含み、サイドシール部を挟む両側それぞれにおける外装体を構成するシート間に、前記ウエスト部弾性部材又は前記胴回り部弾性部材が接着剤を介して固定されている、請求項１～３の何れか１項に記載のパンツ型着用物品。 Between the sheets constituting the exterior body on each of both sides sandwiching the side seal portion, the exterior body in the front body and the exterior body in the back body include a waist elastic member forming a waist gather or a waist elastic member forming a waist gather The underpants-type wearing article according to any one of claims 1 to 3, wherein the waist elastic member or the waistline elastic member is fixed via an adhesive.
  5. 　前記外装体は、樹脂材を含み、該樹脂材を主成分として形成されている、請求項１～４の何れか１項に記載のパンツ型着用物品。 The pants-type wearing article according to any one of claims 1 to 4, wherein the exterior body includes a resin material and is formed using the resin material as a main component.
  6. 　前記外装体を構成する前記シートは、不織布、フィルム、又は不織布とフィルムとのラミネートシートである、請求項１～５の何れか１項に記載のパンツ型着用物品。 The pants-type wearing article according to any one of claims 1 to 5, wherein the sheet constituting the exterior body is a nonwoven fabric, a film, or a laminate sheet of a nonwoven fabric and a film.
  7. 　前記サイドシール部が延びる方向と直交する断面において、前記シール縁部の外縁には、前記外装体を構成するシートどうしの融着部が形成され、該融着部は、該外装体の厚み方向の中央部が両端部に比して幅が広い、請求項１～６の何れか１項に記載のパンツ型着用物品。 In a cross section orthogonal to the direction in which the side seal portion extends, a fusion portion between sheets constituting the exterior body is formed on the outer edge of the seal edge portion, and the fusion portion is in the thickness direction of the exterior body. The underpants-type wearing article according to any one of claims 1 to 6, wherein a central part of the base is wider than both ends.
  8. 　前記サイドシール部が延びる方向と直交する断面において、前記シール縁部の外縁は、着用物品の内方に向かって凸の弧状をなし、且つ該外縁を含んでそれよりも着用物品の内方に、前記外装体を構成するシートどうしの融着部が形成され、該融着部は、該外装体の厚み方向の中央部が両端部に比して幅が広い、請求項１～６の何れか１項に記載のパンツ型着用物品。 In a cross section orthogonal to the direction in which the side seal portion extends, the outer edge of the seal edge portion has a convex arc shape toward the inside of the wearing article, and includes the outer edge and is further inward of the wearing article. A fusion part between sheets constituting the exterior body is formed, and the fusion part is wider at the center in the thickness direction of the exterior body than at both ends. The underpants type wearing article of Claim 1.
  9. 　前記複数の部位として、８枚又は６枚のシートが重ねられた８又は６層構造部分と、４枚のシートが重ねられた４層構造部分とを備えている、請求項１～８の何れか１項に記載のパンツ型着用物品。 9. The structure according to claim 1, wherein the plurality of portions include an 8 or 6 layer structure portion in which 8 sheets or 6 sheets are stacked, and a 4 layer structure portion in which 4 sheets are stacked. The underpants type wearing article of Claim 1.
  10. 　前記複数の部位として、ウエスト開口部の開口端部及びその近傍が８枚のシートが重ねられた８層構造部分、それ以外の部分が、４枚のシートが重ねられた４層構造部分となっている、請求項１～９の何れか１項に記載のパンツ型着用物品。 As the plurality of portions, the opening end portion of the waist opening and the vicinity thereof are an eight-layer structure portion in which eight sheets are stacked, and the other portions are four-layer structure portions in which four sheets are stacked. The pants-type wearing article according to any one of claims 1 to 9.
  11. 　パンツ型着用物品の幅方向中央部における８層構造部分は、前記外装体の両側部が、吸収性本体の長手方向両端部を覆うように折り返されている、請求項１～１０の何れか１項に記載のパンツ型着用物品。 The eight-layer structure portion in the center portion in the width direction of the pants-type wearing article is folded back so that both side portions of the exterior body cover both end portions in the longitudinal direction of the absorbent main body. Articles for wearing underpants type.
  12. 　パンツ型着用物品の構成部材の色を、前記サイドシール部よりも腹側と背側とで異ならせる、請求項１～１１の何れか１項に記載のパンツ型着用物品。 The pant-type wearing article according to any one of claims 1 to 11, wherein the colors of the constituent members of the pant-type wearing article are different between the ventral side and the back side than the side seal portion.
  13. 　前記パンツ型着用物品は、着用時に股下部に配される股下部並びにその縦方向の前後に位置する腹側部及び背側部を有し、
    　パンツ型着用物品の腹側部と背側部とで、ウエスト部弾性部材、又は前記外装体を構成するシートの色が異なる、請求項１～１２の何れか１項に記載のパンツ型着用物品。     The pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
    The pant-type wearing article according to any one of claims 1 to 12, wherein the color of the waist elastic member or the sheet constituting the exterior body is different between the abdominal side part and the back side part of the pant-type wearing article. .
  14. 　前記パンツ型着用物品は、着用時に股下部に配される股下部並びにその縦方向の前後に位置する腹側部及び背側部を有し、
    　前記外装体は、腹側部、股下部及び背側部に亘る砂時計状の連続した形状を有する、請求項１～１３の何れか１項に記載のパンツ型着用物品。     The pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
    The pants-type wearing article according to any one of claims 1 to 13, wherein the exterior body has an hourglass-like continuous shape extending from the abdomen, the crotch, and the back.
  15. 　前記パンツ型着用物品は、着用時に股下部に配される股下部並びにその縦方向の前後に位置する腹側部及び背側部を有し、
    　前記外装体は、腹側部に配される腹側シート部材と、背側部に配される背側シート部材とに分割されており、吸収性本体がこれら両シート部材に架け渡して固定されている、請求項１～１４の何れか１項に記載のパンツ型着用物品。     The pants-type wearing article has a crotch portion arranged in the crotch portion when worn, and a ventral side portion and a back side portion located in the longitudinal direction of the crotch portion,
    The exterior body is divided into an abdominal sheet member disposed on the abdominal side part and a back sheet member disposed on the back side part, and the absorbent main body is bridged and fixed to both the sheet members. The pants-type wearing article according to any one of claims 1 to 14,
  16. 　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法であって、
    　前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、
    　加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備し、
    　前記帯状の外装体は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる部位を有しており、
    　前記サイドシール部形成工程においては、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に、前記レーザー光を、該部位毎に出力又は走査速度を異ならせて照射し、各部位に形成されるシール縁部の融着強度を等しくする、パンツ型着用物品の製造方法。     An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body The side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part. A method for producing a pants-type wearing article having a seal edge bonded at
    A polymerization pressurizing step for pressing the formation planned site of the side seal part in the belt-shaped exterior body in a state where the front body side and the back body side are overlapped; and
    While cutting the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body to the formation planned site of the side seal portion in a pressurized state And a side seal part forming step for forming the seal edge by fusing the cut edges of the laminated exterior body produced by the division,
    The strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
    In the side seal portion forming step, the laser beam is applied to a plurality of portions where the total number of laminated sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side is different from each other. A method for manufacturing a pants-type wearing article, in which irradiation is performed at different output or scanning speeds to equalize the fusion strength of the seal edge formed at each part.
  17. 　前記光通過部の長手方向に沿って直線的に走査させて、サイドシール部の形成予定部位にレーザー光を照射する際、合計積層枚数が最も多い高積層部分にレーザー光を照射している間のレーザー光の出力値を、合計積層枚数が最も少ない低積層部分に照射する間の出力値に比べて低下させる、請求項１６に記載のパンツ型着用物品の製造方法。 While irradiating the laser beam to the formation part of the side seal part by linearly scanning along the longitudinal direction of the light passage part, while irradiating the laser beam to the high lamination part with the largest total number of laminations The manufacturing method of the underpants type wearing article of Claim 16 which reduces the output value of the laser beam of compared with the output value during the time of irradiating the low lamination | stacking part with the fewest total lamination | stacking number of sheets.
  18. 　前記光通過部の長手方向に沿って直線的に走査させて、サイドシール部の形成予定部位にレーザー光を照射する際、合計積層枚数が最も多い高積層部分にレーザー光を照射している間のレーザー光の走査速度を、合計積層枚数が最も少ない低積層部分に照射する間の走査速度に比べて高速とする、請求項１７に記載のパンツ型着用物品の製造方法。 While irradiating the laser beam to the formation part of the side seal part by linearly scanning along the longitudinal direction of the light passage part, while irradiating the laser beam to the high lamination part with the largest total number of laminations The manufacturing method of the underpants type wearing article of Claim 17 which makes the scanning speed of the said laser beam high compared with the scanning speed between irradiating the low lamination | stacking part with the fewest total number of lamination | stacking.
  19. 　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法であって、
    　前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、
    　加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備し、
    　前記帯状の外装体は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる部位を有しており、
    　前記サイドシール部形成工程においては、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位に、前記レーザー光を、該部位毎に幅が異なる光通過部を介して照射し、各部位に形成されるシール縁部の融着強度を等しくする、パンツ型着用物品の製造方法。     An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body The side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part. A method for producing a pants-type wearing article having a seal edge bonded at
    A polymerization pressurizing step for pressing the formation planned site of the side seal part in the belt-shaped exterior body in a state where the front body side and the back body side are overlapped; and
    While cutting the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body to the formation planned site of the side seal portion in a pressurized state And a side seal part forming step for forming the seal edge by fusing the cut edges of the laminated exterior body produced by the division,
    The strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
    In the side seal portion forming step, the laser beam is applied to a plurality of portions where the total number of laminated sheets of the sheet constituting the outer body on the front body side and the sheet constituting the outer body on the rear body side is different from each other. A method for manufacturing a pants-type wearing article, in which irradiation is performed through light passing portions having different widths to equalize the fusion strength of the seal edge formed at each portion.
  20. 　前記光通過部は、パンツ型着用物品の連続体又は帯状の外装体のサイドシール部の形成予定部位のうち、合計積層枚数が最も多い高積層部分と重なる部分に幅広部を有し、合計積層枚数が最も少ない低積層部分と重なる部分に、幅広部より幅が狭い幅狭部を有している、請求項１９に記載のパンツ型着用物品の製造方法。 The light passing portion has a wide portion in a portion overlapping a highly laminated portion having the largest total number of laminated layers, among the planned formation portions of the side seal portion of the continuous body of the pants-type wearing article or the belt-shaped exterior body, and the total laminated portion The manufacturing method of the underpants type wearing article of Claim 19 which has a narrow part narrower than a wide part in the part which overlaps with the low lamination | stacking part with the few number of sheets.
  21. 　前記幅広部の幅Ｗ１に対する前記幅狭部５３の幅Ｗ２の比（Ｗ２／Ｗ１）が、０．０２５以上である、請求項２０に記載のパンツ型着用物品の製造方法。 The manufacturing method of the underpants type wearing article according to claim 20 whose ratio (W2 / W1) of width W2 of said narrow part 53 to width W1 of said wide part is 0.025 or more.
  22. 　着用物品の外面を形成する外装体を備え、前身頃における外装体の両側縁部と後身頃における外装体の両側縁部とが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されており、前記サイドシール部は、前身頃における外装体の縁部と後身頃における外装体の縁部が、該サイドシール部の長手方向に延在する連続線状の融着部で結合したシール縁部を有するパンツ型着用物品の製造方法であって、
    　前身頃側と後身頃側とを重ねた状態の帯状の外装体におけるサイドシール部の形成予定部位を加圧状態にする重合加圧工程と、
    　加圧状態にある前記サイドシール部の形成予定部位に、前記外装体の搬送方向と交差する方向に延在する光通過部を介してレーザー光を照射することにより、該外装体を分断すると共に、その分断によって生じた積層状態の外装体の切断縁部どうしを融着させて前記シール縁部を形成するサイドシール部形成工程とを具備し、
    　前記帯状の外装体は、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる部位を有しており、
    　前記サイドシール部形成工程においては、前記帯状の外装体が接する外面における前記光通過部の近傍に、該外装体側に突出する突出部を有し、前身頃側の外装体を構成するシートと後身頃側の外装体を構成するシートの合計積層枚数が相互に異なる複数の部位毎に、該突出部の突出高さ又は幅が異なる支持部材を用いて、該各部位にレーザー光の照射を行い、該各部位に形成されるシール縁部の融着強度を等しくする、パンツ型着用物品の製造方法。     An exterior body that forms the outer surface of the wearing article is provided, and a pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining both side edges of the exterior body in the front body and both side edges of the exterior body in the back body The side seal part is a continuous linear fusion part in which the edge of the exterior body in the front body and the edge of the exterior body in the back body extend in the longitudinal direction of the side seal part. A method for producing a pants-type wearing article having a seal edge bonded at
    A polymerization pressurizing step for pressing the formation planned site of the side seal part in the belt-shaped exterior body in a state where the front body side and the back body side are overlapped; and
    While cutting the exterior body by irradiating a laser beam through a light passage portion extending in a direction intersecting the transport direction of the exterior body to the formation planned site of the side seal portion in a pressurized state And a side seal part forming step for forming the seal edge by fusing the cut edges of the laminated exterior body produced by the division,
    The strip-shaped exterior body has a portion where the total number of stacked sheets of the sheet constituting the exterior body on the front body side and the sheet constituting the exterior body on the back body side is different from each other,
    In the side seal portion forming step, a sheet and a rear portion of the front body side exterior body having a projecting portion projecting toward the exterior body side in the vicinity of the light passage portion on the outer surface in contact with the belt-shaped exterior body For each of a plurality of portions where the total number of laminated sheets constituting the body-side exterior body is different from each other, a laser beam is irradiated to each portion using a support member having a different protruding height or width of the protruding portion. The manufacturing method of the underpants type wearing article which makes equal the fusion | melting strength of the seal edge part formed in this each site | part.
  23. 　前記サイドシール部の形成予定部位におけるシート間に、接着剤が存在するか否か又は接着剤が存在する態様に応じて、前記合計積層枚数が異なる部位の融着強度の差を調整する手段として採用した手段を微調整する、請求項１６～２２の何れか１項に記載のパンツ型着用物品の製造方法。 As a means for adjusting the difference in the fusion strength of the portions where the total number of stacked layers is different depending on whether or not an adhesive is present between sheets at the site where the side seal portion is to be formed. The method for manufacturing a pants-type wearing article according to any one of claims 16 to 22, wherein the adopted means is finely adjusted.
  24. 　前記サイドシール部の形成予定部位のうちの合計積層枚数が最も少ない低積層部分については、前記支持部材における、前記光通過部を挟んだ両側の高位部で強く押さえた状態で、レーザー光を照射し、合計積層枚数が最も多い高積層部分については、該支持部材における、該光通過部を挟んだ両側の低位部で高位部よりも弱く押さえた状態で、レーザー光を照射する、請求項２２又は２３に記載のパンツ型着用物品の製造方法。 The low-lamination portion with the smallest total number of laminated layers among the portions where the side seal portion is to be formed is irradiated with laser light in a state where it is strongly pressed by the high-order portions on both sides of the light passing portion of the support member. The high-lamination portion having the largest total number of laminated layers is irradiated with laser light in a state where it is held weaker than the high-order portion at the low-order portions on both sides of the light-passing portion of the support member. Or the manufacturing method of the underpants type wearing article of 23.
  25. 　前記外装体を構成する帯状の外層シート及び帯状の内層シートには、それらを重ね合わせる前に、両シートの何れか一方又は双方の対向する面の所定部位に、接着剤塗工機によりホットメルト型接着剤を塗工する、請求項１６～２４の何れか１項に記載のパンツ型着用物品の製造方法。 The belt-like outer layer sheet and the belt-like inner layer sheet constituting the exterior body are hot-melted with an adhesive coating machine on a predetermined portion of one or both of the opposite surfaces of the two sheets before being overlapped. The method for producing a pants-type wearing article according to any one of claims 16 to 24, wherein a mold adhesive is applied.
  26. 　ウエスト部弾性部材、胴回り部弾性部材等の弾性部材が、前記外装体を構成する帯状の外層シート及び該外装体を構成する帯状の内層シートにおける、レーザー光の照射によって分断される分断予定部分を跨ぐように伸長状態で配されている場合、該分断予定部分及びその近傍に接着剤を塗工しておく、請求項１６～２５の何れか１項に記載のパンツ型着用物品の製造方法。 The elastic member such as the waist elastic member, the waist elastic member, and the like in the band-shaped outer layer sheet constituting the outer package and the portion to be divided by the laser beam irradiation in the band-shaped inner layer sheet constituting the outer package The method for producing a pants-type wearing article according to any one of claims 16 to 25, wherein when the stretched portion is arranged so as to straddle, an adhesive is applied to the portion to be divided and the vicinity thereof.
  27. 　ウエスト部弾性部材及び胴回り部弾性部材には、前記外装体を構成する帯状の外層シート及び該装体を構成する帯状の内層シート間に配される前に、接着剤塗工機によりホットメルト型接着剤を間欠的に塗工する、請求項１６～２６の何れか１項に記載のパンツ型着用物品の製造方法。 The waist part elastic member and the waistline part elastic member are hot melt type by an adhesive coating machine before being arranged between the belt-like outer layer sheet constituting the exterior body and the belt-like inner layer sheet constituting the body. The method for producing a pants-type wearing article according to any one of claims 16 to 26, wherein the adhesive is intermittently applied.
  28. 　前記外装体を構成する帯状の外層シート及び該外装体を構成する帯状の内層シートにおける、レーザー光の照射によって分断される分断予定部分に存在する弾性部材は、前記サイドシール部形成工程前に切断するか、又は、該サイドシール部形成工程におけるレーザー光の照射により切断する、請求項１６～２７の何れか１項に記載のパンツ型着用物品の製造方法。 In the belt-shaped outer layer sheet constituting the exterior body and the belt-shaped inner layer sheet constituting the exterior body, an elastic member present in a portion to be divided that is divided by laser light irradiation is cut before the side seal portion forming step. The method for manufacturing a pants-type wearing article according to any one of claims 16 to 27, wherein cutting is performed by laser light irradiation in the side seal portion forming step.
  29. 　レーザー光の照射によって分断される分断予定部分及びその近傍における互いに重なり合う前記外装体を構成する外層シート及び該外装体を構成する内層シートの２枚のシート間は、レーザー光の照射前において、全く接合されていない、請求項１６～２８の何れか１項に記載のパンツ型着用物品の製造方法。 Between the two sheets of the outer layer sheet constituting the outer package and the inner layer sheet constituting the outer package, which overlap each other in the vicinity of the part to be divided by the laser beam irradiation, before the laser beam irradiation, The method for producing a pants-type wearing article according to any one of claims 16 to 28, wherein the article is not joined.
  30. 　帯状の前記外装体をその幅方向に折り畳むことにより、吸収性本体が固定された帯状の該外装体の前身頃側と後身頃側とを重ね合わせ、サイドシール部が形成されていないパンツ型着用物品の前駆体が一方向に連なってなる、パンツ型着用物品の連続体を製造する、請求項１６～２９の何れか１項に記載のパンツ型着用物品の製造方法。 By folding the belt-shaped exterior body in the width direction, the front body side and the back body side of the belt-shaped exterior body to which the absorbent main body is fixed are overlapped, and the pants-type wear in which the side seal part is not formed The method for producing a pant-type wearing article according to any one of claims 16 to 29, wherein a continuous body of the pant-type wearing article, in which the precursor of the article is continuous in one direction, is produced.
  31. 　前記サイドシール部形成工程は、レーザー式接合装置を用いてレーザー光を照射して一対のサイドシール部を形成する、請求項１６～３０の何れか１項に記載のパンツ型着用物品の製造方法。 The method for manufacturing a pants-type wearing article according to any one of claims 16 to 30, wherein the side seal portion forming step forms a pair of side seal portions by irradiating a laser beam using a laser type bonding apparatus. .
  32. 　前記レーザー式接合装置は、回転駆動される中空の円筒ロールと、該円筒ロールの中空部に配され、該円筒ロールの周面部を形成する環状の支持部材に向けてレーザー光を照射する照射ヘッドと、無端状の加圧ベルトを備えたベルト式加圧装置と、環状の該支持部材の外周面に巻き掛ける該加圧ベルトの張力を増減調整できる張力調整機構とを備え、該張力の調整により、該支持部材と該加圧ベルトとによって、パンツ型着用物品の連続体に加える圧力を調整することができる、請求項３１に記載のパンツ型着用物品の製造方法。 The laser-type bonding apparatus includes a hollow cylindrical roll that is driven to rotate, and an irradiation head that is disposed in a hollow portion of the cylindrical roll and irradiates laser light toward an annular support member that forms a peripheral surface portion of the cylindrical roll. And a belt type pressure device provided with an endless pressure belt, and a tension adjusting mechanism capable of adjusting the tension of the pressure belt wound around the outer peripheral surface of the annular support member to adjust the tension. The method for producing a pants-type wearing article according to claim 31, wherein the pressure applied to the continuous body of the pants-type wearing article can be adjusted by the support member and the pressure belt.
  33. 　前記支持部材は、レーザー光が通過可能な光通過部を有しており、
    　前記光通過部として、前記支持部材を厚み方向に貫通するスリット状の開口部を有している、請求項２２～３２の何れか１項に記載のパンツ型着用物品の製造方法。     The support member has a light passage part through which laser light can pass,
    The method for manufacturing a pant-type wearing article according to any one of claims 22 to 32, wherein the light passing part has a slit-like opening that penetrates the support member in the thickness direction.
  34. 　前記支持部材は、前記光通過部ではレーザー光を通過させる一方、前記光通過部以外の部分ではレーザー光を通過させない、請求項２２～３３の何れか１項に記載のパンツ型着用物品の製造方法。 The production of the pant-type wearing article according to any one of claims 22 to 33, wherein the support member allows laser light to pass through the light passage part, but does not allow laser light to pass through a part other than the light passage part. Method.
  35. 　前記支持部材は、被加工物との当接面に凹部を有しており、該凹部は、円筒状の該支持部材の周方向に所定間隔を置いて複数形成されており、隣接する２つの凹部間に位置する領域に、スリット状の前記光通過部が形成されている、請求項２２～３４の何れか１項に記載のパンツ型着用物品の製造方法。 The support member has a recess in the contact surface with the workpiece, and a plurality of the recesses are formed at predetermined intervals in the circumferential direction of the cylindrical support member. The method for manufacturing a pants-type wearing article according to any one of claims 22 to 34, wherein the slit-shaped light passing portion is formed in a region located between the recesses.
  36. 　前記支持部材及び加圧ベルトは、空冷、水冷等により温度を所定の温度範囲に維持する、請求項２２～３５の何れか１項に記載のパンツ型着用物品の製造方法。 The method for manufacturing a pants-type wearing article according to any one of claims 22 to 35, wherein the temperature of the support member and the pressure belt is maintained within a predetermined temperature range by air cooling, water cooling, or the like.
  37. 　パンツ型着用物品の連続体は、一方の面が支持部材に当接し且つサイドシール部の形成予定部位が前記光通過部上に位置するように、回転する支持部材上に導入されると共に、他方の面に、加圧ベルト又はその他の押さえ部材が押し付けられることによって、搬送されつつ厚み方向に加圧される、請求項２２～３６の何れか１項に記載のパンツ型着用物品の製造方法。 The continuous body of the pants-type wearing article is introduced on the rotating support member so that one surface abuts the support member and the side seal portion is to be formed on the light passage portion, and the other The method for manufacturing a pants-type wearing article according to any one of claims 22 to 36, wherein a pressure belt or other pressing member is pressed against the surface of the surface to be pressed in the thickness direction while being conveyed.
  38. 　搬送中且つ加圧状態の分断予定部分に対して、支持部材側から前記光通過部を介してレーザー光を照射され、該レーザー光の照射点は、円筒ロールの周方向に任意に移動可能に構成されており、該光通過部の該周方向に沿った移動に追従して走査するように設定されていることにより、該光通過部上に位置する該分断予定部分には、その搬送中に該レーザー光が一定時間連続的に照射される、請求項２２～３７の何れか１項に記載のパンツ型着用物品の製造方法。 Laser beam is irradiated from the support member side through the light passing part to the part to be divided that is being transported and pressurized, and the irradiation point of the laser beam can be arbitrarily moved in the circumferential direction of the cylindrical roll By being configured to scan following the movement of the light passage portion along the circumferential direction, the part to be divided located on the light passage portion is being conveyed. The method for producing a pants-type wearing article according to any one of claims 22 to 37, wherein the laser beam is continuously irradiated for a predetermined time.
  39. 　一回のレーザー光の照射で、帯状の前記外装体の分断と、その分断によって生じた２箇所の加圧状態にある該外装体の切断縁部どうしの融着とを同時に実施する、請求項１６～３８の何れか１項に記載のパンツ型着用物品の製造方法。 The laser beam is irradiated once to simultaneously divide the belt-shaped outer package and fuse the cut edges of the outer package in two pressurized states generated by the division. The method for producing a pants-type wearing article according to any one of 16 to 38.
  40. 　前記外装体を構成する外層シート及び該外装体を構成する内層シートの切断縁部は、レーザー光の照射中及び照射終了直後は、発熱して溶融状態となっているが、レーザー光の照射によってパンツ型着用物品の連続体から切り分けられた１つの枚葉のおむつ前駆体及び該パンツ型着用物品の連続体それぞれの、支持部材と加圧ベルトとによる加圧状態が保持されたまま、照射終了後からは外気や支持部材・加圧ベルトへの伝熱によって速やかに冷却されて固化し、該切断縁部の形成材料が溶融一体化した融着部となる、請求項２２～３９の何れか１項に記載のパンツ型着用物品の製造方法。
          The outer layer sheet constituting the outer package and the cut edge portion of the inner layer sheet constituting the outer package are heated and melted during the irradiation of the laser beam and immediately after the irradiation, but by the irradiation of the laser beam Irradiation is completed while the pressed state of the support member and the pressure belt of each of the diaper precursor of a single sheet cut from the continuous body of the pant-type wearing article and the continuous body of the pant-type wearing article is maintained. 40. Any one of claims 22 to 39, wherein the material is cooled and solidified quickly by heat transfer to the outside air, the support member, or the pressure belt, and the fused edge forming material is fused and integrated. The manufacturing method of the underpants type wearing article of 1 item | term.
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WO2011156299A1 (en) * 2010-06-07 2011-12-15 The Procter & Gamble Company Seam structure and method for making a seam
JP2013031763A (en) * 2012-11-19 2013-02-14 Livedo Corporation Method for producing disposable pull-up diaper

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US10806635B2 (en) 2016-03-15 2020-10-20 The Procter & Gamble Company Methods and apparatuses for separating and positioning discrete articles

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