WO2019106731A1 - 吸収体の製造方法及び吸収性物品の製造方法 - Google Patents
吸収体の製造方法及び吸収性物品の製造方法 Download PDFInfo
- Publication number
- WO2019106731A1 WO2019106731A1 PCT/JP2017/042688 JP2017042688W WO2019106731A1 WO 2019106731 A1 WO2019106731 A1 WO 2019106731A1 JP 2017042688 W JP2017042688 W JP 2017042688W WO 2019106731 A1 WO2019106731 A1 WO 2019106731A1
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- WIPO (PCT)
- Prior art keywords
- sheet
- manufacturing
- absorbent
- sheet piece
- absorber
- Prior art date
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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
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
- A61F13/15634—Making fibrous pads between sheets or webs
-
- 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
-
- 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
- A61F13/15764—Transferring, feeding or handling devices; Drives
-
- 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
- A61F13/15666—Wrapping formed fibrous webs or pads, e.g. the pads being formed by uniting pad pieces cut from fibrous webs
- A61F13/15674—Wrapping formed fibrous webs or pads, e.g. the pads being formed by uniting pad pieces cut from fibrous webs by wrapping webs or pads between webs moving in their longitudinal direction
-
- 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
- A61F13/15723—Partitioning batts; 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
- A61F13/53—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 absorbing medium
-
- 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
- A61F2013/15715—Shaping or making outer layers
-
- 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 method of producing an absorbent for an absorbent article and a method of producing the absorbent article.
- an absorber used for absorbent articles such as a disposable diaper, a sanitary napkin, and an incontinence pad
- an absorber including, for example, pulp fibers and synthetic fibers is known.
- synthetic fibers when synthetic fibers are contained in the absorber, it is possible to impart flexibility to the absorber and to absorb body fluid at high speed.
- Patent Document 1 As a method for producing an absorbent containing pulp fibers and synthetic fibers, for example, Patent Document 1 is known.
- Patent Document 1 describes an absorbent article in which a non-woven fabric having a three-dimensional structure in which fibers are bonded in advance is formed, and then the non-woven fabric is crushed to form non-woven fabric pieces, and the non-woven fabric pieces are mixed with hydrophilic fibers. A method of making the absorber is described. Further, Patent Document 1 describes that a cutter mill method is adopted as a means for crushing a non-woven fabric.
- the present invention is a method of making an absorbent for an absorbent article comprising synthetic fibers and hydrophilic fibers.
- the manufacturing method includes: a conveying step of conveying a plurality of sheet pieces including the synthetic fiber and the hydrophilic fiber to a stacking unit using a conveying unit; and the plurality of sheet pieces conveyed in the conveying step Accumulating step of accumulating hydrophilic fibers in the accumulating portion to obtain an accumulated body which is a component member of an absorber, and pressing a part of the accumulated body obtained in the accumulating step to press the recessed portion in the accumulated body And forming a recess.
- the sheet piece and the hydrophilic fiber are brought into contact with each other in an air flow generated in the conveying portion, and the sheet piece and the hydrophilic fiber are scattered in a mixed state of the both. Transport by air flow.
- the present invention also relates to a method of manufacturing an absorbent article comprising a liquid-permeable top sheet forming a skin contact surface, a back sheet forming a non-skin contact surface, and an absorbent interposed between these two sheets. is there.
- the manufacturing method includes: a conveying step of conveying a plurality of sheet pieces containing synthetic fibers and a hydrophilic fiber to the accumulation portion using the conveying portion; the plurality of sheet pieces conveyed in the conveying step and the hydrophilicity Process of accumulating the functional fibers in the accumulation unit to obtain an accumulation body which is a component member of the absorber, a surface sheet polymerization process of overlapping the surface sheet on the upper surface side of the accumulation body, and
- the method includes a back sheet polymerization step of overlapping the back sheet on the lower surface side, and a recess forming step of pressing a part of the stack to form a recess in the stack, and in the transport step, it occurs in the transport portion
- the sheet piece and the hydrophilic fiber are brought into contact with each other in the air flow, and the sheet piece and the hydrophilic fiber are transported by the air flow in a scattered state in which the sheet piece and the hydrophilic fiber are mixed.
- FIG. 1 is a plan view showing a preferred embodiment of an absorbent body produced by the method for producing an absorbent body of the present invention.
- FIG. 2 is a cross-sectional view taken along line II-II of the absorber shown in FIG.
- FIG. 3 is a schematic perspective view showing a preferred embodiment of a manufacturing apparatus for manufacturing the absorber shown in FIG.
- FIG. 4 is a schematic side view of the manufacturing apparatus shown in FIG. 3 as viewed from the side.
- FIG. 5 is an enlarged side view of a supply unit provided in the manufacturing apparatus shown in FIG.
- FIG. 6 is a view schematically showing a state in which the hydrophilic fibers are in contact with the lumps of the sheet pieces in the duct and the sheet pieces are dispersed and conveyed.
- FIG. 1 is a plan view showing a preferred embodiment of an absorbent body produced by the method for producing an absorbent body of the present invention.
- FIG. 2 is a cross-sectional view taken along line II-II of the absorber shown
- FIG. 7 is a view schematically showing a state in which the absorbent particles are in contact with the lumps of the sheet pieces and the sheet pieces are dispersed and conveyed in the duct.
- FIG. 8 is a cross-sectional view of a preferred embodiment of an absorbent article produced by the method of producing an absorbent article of the present invention.
- the present invention is to provide a method of manufacturing an absorber that suppresses a decrease in moldability of a recess in a method of manufacturing an absorber containing a sheet piece containing a synthetic fiber and a hydrophilic fiber.
- the present invention also provides a method of manufacturing an absorbent article that suppresses a decrease in the formability of a recess in a method of manufacturing an absorbent article having an absorbent containing sheet pieces containing synthetic fibers and hydrophilic fibers. It is in.
- the production method of the present invention is a method for producing an absorbent comprising synthetic fibers and hydrophilic fibers, and an absorbent article comprising the absorbent.
- the absorbent produced in the present invention is an absorbent for an absorbent article.
- An absorbent article is mainly used to absorb and hold body fluids excreted from the body such as urine and menstrual blood.
- Absorbent articles include, but are not limited to, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., and widely include articles used for absorbing fluid discharged from the human body. Do.
- the absorbent article typically comprises a liquid-permeable top sheet, a liquid-impermeable or water-repellent back sheet, and a liquid-retaining absorbent interposed between the two sheets.
- the absorber is an absorber formed by the method for producing an absorber of the present invention.
- FIG. 1 shows a plan view of an absorber 100 according to an embodiment produced by the method of producing an absorber according to the present embodiment
- FIG. 2 shows II-II of the absorber 100 shown in FIG. A cross-sectional view is shown.
- the absorber 100 contains the synthetic fiber 10b and the hydrophilic fiber 10a.
- the absorbent body 100 includes an aggregate 100 a including not only the synthetic fibers 10 b and the hydrophilic fibers 10 a but also the absorbent particles 10 c.
- “including the synthetic fiber 10b” means having the sheet piece 10bh containing the synthetic fiber 10b.
- the absorbent body 100 may be a single layer or a plurality of layers as long as it includes the synthetic fiber 10b and the hydrophilic fiber, but in the present embodiment, the hydrophilic fiber 10a, the synthetic fiber 10b and the absorbability It has the accumulation
- the stack 100a is a component of the absorber 100, and the absorber 100 of the present embodiment is formed by covering the stack 100a with a core wrap sheet 100b.
- the absorbent body 100 of the present embodiment has a shape that is long in the longitudinal direction corresponding to the front-rear direction of the wearer when the absorbent article is worn.
- the absorber 100 of this embodiment has the some recessed part 100e formed by pressurizing some cored sheets 100a covered with the core wrap sheet 100b from the top of this core wrap sheet 100b.
- the concave portion 100 e is formed so as to be recessed toward the non-skin opposing surface side from the skin opposing surface side of the absorber 100 facing the wearer's skin.
- the absorber 100 only the skin facing surface side of the absorber 100 is formed to be recessed in a concave shape.
- the recess 100e is formed of a compressed portion in which the density of the constituent material is relatively increased by compression.
- the recessed part 100e of the absorber 100 can be formed by embossing with respect to the absorber 100 formed by wrapping the accumulation body 100a by the core wrap sheet 100b.
- the concave portion 100 e can adopt various shapes such as a circle, an oval, a square, a rectangle, a triangle, etc. when the absorber 100 is viewed in plan from the side facing the skin, but in the absorber 100 As shown in FIG. 1, a circular shape is employed. Moreover, as shown in FIG. 1, the recessed part 100e is distribute
- a row of the recesses 100e in which the recesses 100e are equally spaced in the first direction (Y direction) is arranged in a plurality of rows equally spaced in the second direction (X direction)
- An arrangement in which the closest recesses 100e forming a row of the recesses 100e adjacent to each other in the second direction are shifted by a half pitch.
- Recesses 100e are arranged per unit area is preferably 2 / cm 2 or more 10 / cm 2 or less, and more preferably 5 / cm 2 or more 8 / cm 2 or less. Further, the maximum crossing length L in plan view of the concave portion 100e is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 8 mm or less, more preferably 6 mm or less. The maximum crossing length L is a diameter when the plan view shape of the concave portion 100e is circular as shown in FIG.
- the stacked body 100a includes a plurality of sheet pieces 10bh (hereinafter, also simply referred to as sheet pieces 10bh) including the synthetic fibers 10b, and each sheet piece 10bh has a substantially rectangular shape.
- the average length of each sheet piece 10bh is preferably 0.3 mm or more and 30 mm or less, more preferably 1 mm or more and 15 mm or less, and particularly preferably 2 mm or more and 10 mm or less.
- the average length indicates the average value of the lengths of the sides in the longitudinal direction when each sheet piece 10bh has a rectangular shape.
- each sheet piece 10bh has a square shape, it indicates the average value of the lengths of any one side of the four sides.
- the average width of each sheet piece 10bh is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 6 mm or less, and particularly preferably 0.5 mm or more and 5 mm or less.
- the average width indicates the average value of the lengths of the sides in the short direction when each sheet piece 10bh has a rectangular shape.
- each sheet piece 10bh When each sheet piece 10bh has a square shape, it indicates the average value of the lengths of any one side of the four sides.
- the average width of the sheet piece 10bh is 0.1 mm or more, it is easy to form a sparse structure in the absorber 100, and when it is 10 mm or less, it is difficult for the wearer to feel discomfort due to the absorber 100. The position within 100 is unlikely to cause unevenness in the absorption performance.
- the various things conventionally used for the absorber for absorbent articles can be used without a restriction
- the hydrophilic fibers 10a include pulp fibers, rayon fibers, cotton fibers and the like.
- the synthetic fiber 10 b include short fibers such as polyethylene, polypropylene and polyethylene terephthalate.
- the sheet piece 10bh is not particularly limited as long as it has a sheet shape, but a non-woven fabric is preferable.
- examples of the absorbent particles 10c include starch-based, cellulose-based, synthetic polymer-based, and superabsorbent polymer-based ones.
- the superabsorbent polymer for example, those comprising starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, cross-linked product of sodium carboxymethyl cellulose, acrylic acid (salt) polymer, etc. It can be used.
- a component which constitutes absorber 100 a deodorizer, an antibacterial agent, etc. can also be used if needed.
- the core wrap sheet 100 b include tissue paper and liquid-permeable nonwoven fabric.
- FIGS. 3 and 4 show the overall configuration of the manufacturing apparatus 1 of one embodiment used to carry out the manufacturing method of the present embodiment. In describing the method of manufacturing the absorbent body 100 of the present embodiment, the manufacturing apparatus 1 of the present embodiment will be described first.
- the manufacturing apparatus 1 for manufacturing the absorbent body 100 uses the hydrophilization sheet 21 as the hydrophilic sheet 10 as including the hydrophilic fiber 10 a from the upstream side to the downstream side in the transport direction.
- a rotary drum 4 disposed adjacent to the downstream side of the duct 3 and having an accumulation portion for accumulating the raw materials of the absorber 100, and an outer peripheral surface 4f opposite to the duct 3 in the rotary drum 4
- a stacking recess 41 which is an example of the stacking unit, is disposed on the outer peripheral surface of the rotating drum 4.
- the direction in which the belt-like synthetic fiber sheet 10bs including the synthetic fiber 10b and the absorbent 100 are conveyed is the Y direction, the direction orthogonal to the conveying direction, and the width direction of the synthetic fiber sheet 10bs and the absorbent 100 which are conveyed.
- Is the X direction, and the thickness direction of the conveyed synthetic fiber sheet 10bs and the absorber 100 is the Z direction.
- the first direction described later is a direction extending in the transport direction Y, and means a direction in which the angle formed with the transport direction Y is less than 45 degrees.
- the first direction coincides with the direction parallel to the transport direction Y.
- the 2nd direction mentioned later is a direction which intersects with the 1st direction.
- the second direction is a direction orthogonal to the first direction, and coincides with a direction parallel to the width direction X of the synthetic fiber sheet 10bs to be conveyed and the absorber 100.
- the manufacturing apparatus 1 is equipped with the disentanglement part 2 which disentangles the strip
- the defibrating unit 2 includes a defibrator 21 that defibrates the hydrophilic sheet 10 as, and a casing 22 that covers the upper side of the defibrator 21.
- the defibrating unit 2 is a portion that supplies the disintegrated hydrophilic fiber 10 a that is a raw material of the absorber 100 to the inside of the duct 3.
- the defibrating unit 2 includes a pair of feed rollers 23 and 23 that supply the hydrophilic sheet 10 as to the defibrating machine 21.
- At least one of the pair of feed rollers 23, 23 is configured to be rotated by a driving device (not shown).
- the pair of feed rollers 23 are nip-type rollers.
- a servomotor is mentioned, for example.
- both of the pair of feed rollers 23, 23 be rotated by the driving device.
- the pair of feed rollers 23, 23 may be directly driven by the drive device, or one of the rollers may be driven by the drive device, and the drive may be transmitted to the other roller by transmission means such as a gear.
- the pair of feed rollers 23, 23 may be made less slippery by forming a groove extending in the axial direction on the entire surface thereof.
- a roller may be provided to assist the transport of the hydrophilic sheet 10 as.
- the manufacturing apparatus 1 has the duct 3 as a conveyance part which conveys the raw material of the accumulation body 100a of the absorber 100, as shown to FIG. 3 and FIG.
- the duct 3 extends from the defibrating unit 2 to the rotary drum 4, and the opening on the downstream side of the duct 3 covers the outer peripheral surface 4f located in the space A of the rotary drum 4 maintained at a negative pressure.
- the duct 3 has a top plate 31 forming a top surface, a bottom plate 32 forming a bottom surface, and both side walls 33 and 34 forming both side surfaces.
- the absorber 100 is directed toward the outer peripheral surface 4 f of the rotary drum 4. Air flow is made to flow the raw materials of That is, the inside of the duct 3 is a flow passage 30.
- the manufacturing apparatus 1 has an absorbent particle scattering pipe 36 for supplying the absorbent particles 10 c into the duct 3 on the top plate 31 of the duct 3.
- the absorbent particles 10 c are discharged from the dispersion port provided at the tip of the absorbent particle dispersion tube 36 through an apparatus (not shown) such as a screw feeder, and the flow path in the duct 3 30 will be supplied. Then, the amount of the absorbent particles 10c supplied to the absorbent particle scattering tube 36 can be adjusted by an apparatus (not shown) such as each screw feeder.
- the manufacturing apparatus 1 has a rotating drum 4 as shown in FIGS. 3 and 4.
- the rotary drum 4 has an accumulation recess 41 as an accumulation portion for accumulating the raw material of the absorber on the outer peripheral surface 4 f to obtain an accumulation body.
- the rotary drum 4 has a cylindrical shape, and receives power from a motor (not shown) such as a motor, and a member 40 forming the outer peripheral surface 4f rotates in the direction of arrow R1 about a horizontal axis.
- the rotary drum 4 has a member 40 forming the outer peripheral surface 4 f and a drum main body 42 located inside the member 40. The drum body 42 is fixed and does not rotate.
- the accumulation recess 41 of the rotating drum 4 is continuously disposed over the entire circumference of the rotating drum 4 in the circumferential direction (2Y direction).
- 2Y is the circumferential direction of the rotary drum 4
- X is the width direction of the rotary drum 4 (direction parallel to the rotation axis of the rotary drum 4).
- the stacking recess 41 of the manufacturing apparatus 1 is continuously disposed over the entire circumference of the rotating drum 4 in the circumferential direction 2Y, but the circumferential direction 2Y of the rotating drum 4 is It may be in the form of being disposed in plural numbers at predetermined intervals.
- the drum main body 42 of the rotary drum 4 has a plurality of mutually independent spaces, for example, three spaces A to C.
- the spaces A to C are partitioned by a plate provided from the rotary shaft side of the rotary drum 4 toward the outer peripheral surface 4 f side.
- An intake fan (not shown) as an intake mechanism is connected to the rotary drum 4, and the pressure of a plurality of partitioned spaces in the rotary drum 4 can be adjusted by driving the intake fan.
- the suction force of the area corresponding to the space A which is the upstream area located in the area covered by the outer peripheral surface 4f with the duct 3, is compared with the area corresponding to the spaces B to C which is the downstream area.
- the space A maintained at a negative pressure of the drum main body 42 may be further divided into a plurality of sections so that the pressure can be adjusted for each finely divided space.
- the space B of the drum main body 42 is further divided into a plurality of spaces, and the pressure can be adjusted for each of the finely divided spaces. It is possible to adjust the negative pressure region to a position slightly before the accumulation recess 41 passes through the duct 3.
- the member 40 forming the outer peripheral surface 4f is disposed so as to cover the entire outer periphery of the drum main body 42, as shown in FIGS. 3 and 4, and receives power from a motor such as a motor. It rotates around the horizontal axis in the direction of arrow R1.
- a stacking recess 41 is formed in the member 40 forming the outer peripheral surface 4 f.
- the bottom surface of the accumulation recess 41 is formed of a porous member (not shown), and the accumulation recess 41 in the outer peripheral surface 4 f passes over the space maintained at a negative pressure in the rotating drum 4.
- the porous member functions as a suction hole for sucking the raw material of the absorber 100.
- the manufacturing apparatus 1 is equipped with the supply part 5 which supplies the sheet piece 10bh in the inside of the duct 3, as shown to FIG. 3 and FIG.
- the supply unit 5 has cutter blades 51 and 52 for cutting the belt-like synthetic fiber sheet 10bs including the synthetic fiber 10b in a first direction and a second direction with a predetermined length to form a sheet piece 10bh.
- the supply part 5 has the suction nozzle 58 which attracts
- the supply unit 5 includes a first cutter roller 53 having a plurality of cutter blades 51 for cutting in a first direction, and a second cutter roller 54 having a plurality of cutter blades 52 for cutting in a second direction. doing.
- the supply unit 5 includes one receiving roller 55 disposed to face the first cutter roller 53 and the second cutter roller 54.
- the entire outer periphery of the first cutter roller 53 is provided along the circumferential direction of the first cutter roller 53 on the surface of the first cutter roller 53.
- a plurality of continuously extending cutter blades 51, 51, 51,... are arranged in the axial direction (X direction) of the first cutter roller 53.
- the first cutter roller 53 receives power from a motor such as a motor and rotates in the direction of arrow R3.
- the distance between the cutter blades 51, 51, 51,... Adjacent to each other in the axial direction of the first cutter roller 53 is the width (the length in the short direction) of the sheet piece 10bh including the synthetic fiber 10b formed by cutting And the length in the X direction).
- the synthetic fiber sheet 10bs is cut in a state of being shrunk in the width direction X depending on the tension at the time of sheet conveyance, so that the tension is released in the finished sheet piece 10bh.
- the width of the sheet piece 10bh may be wider than the interval between the blades 51, 51, 51,.
- the surface of the second cutter roller 54 is continuous along the axial direction of the second cutter roller 54 over the entire width of the second cutter roller 54.
- a plurality of cutter blades 52, 52, 52,... Extending in a circumferential direction are arranged at intervals in the circumferential direction of the second cutter roller 54.
- the second cutter roller 54 receives power from a motor such as a motor and rotates in the direction of arrow R 4.
- the receiving roller 55 is a flat roller whose surface is flat.
- the receiving roller 55 receives power from a motor such as a motor and rotates in the direction of the arrow R5.
- the supply unit 5 is configured to receive the receiving roller 55 and the receiving roller 55 from the upstream side to the downstream side in the rotation direction (arrow R5 direction).
- a free roller 56 for introducing a band-shaped synthetic fiber sheet 10bs between the first cutter roller 53 and a first cutter roller 53 for cutting the band-shaped synthetic fiber sheet 10bs in a first direction (Y direction);
- a plurality of strip-shaped sheet pieces 10bh1 (hereinafter, also referred to as sheet piece continuum 10bh1) cut in the first direction, and a nip roller 57 for introducing between the receiving roller 55 and the second cutter roller 54, sheet piece continuum
- a second cutter roller 54 is provided in order to cut 10bh1 in the second direction (X direction).
- the supply part 5 has the feed roller (not shown) which conveys strip
- the feed roller is configured to be rotated by a drive device such as a servomotor, for example.
- the feed roller is made less slippery by forming a groove extending in the axial direction on its surface over the entire circumference or applying a coating treatment for improving the frictional force over the entire circumference. May be It may be difficult to slip by nipping between the nip roll and the feed roller.
- the supply unit 5 has a suction nozzle 58 for suctioning the sheet piece 10bh formed by the second cutter roller 54.
- the suction nozzle 58 has its suction port 581 located below the second cutter roller 54, that is, the rotation direction of the second cutter roller 54 relative to the closest point of contact between the second cutter roller 54 and the receiving roller 55 (arrow R4 Direction) is located downstream. Further, the suction nozzle 58 has its suction port 581 extending over the entire width of the second cutter roller 54.
- the suction roller 581 of the receiving roller 55 and the second cutter roller 54 is arranged such that the suction port 581 of the suction nozzle 58 faces between the receiving roller 55 and the second cutter roller 54. It is preferable to arrange below. Then, from the viewpoint of further improving the suction performance of the sheet piece 10bh, the suction port 581 of the suction nozzle 58 views the receiving roller 55 and the second cutter roller 54 from the side as shown in FIG. It is preferable to cover the outer surface of the second cutter roller 54 so that the arc length of the suction port 581 facing the second cutter roller 54 is longer than the arc length of the suction port 581 facing the.
- the suction nozzle 58 is connected to the top plate 31 side of the duct 3 via the supply pipe 59.
- the sheet piece 10 bh sucked from the suction port 581 of the suction nozzle 58 is supplied to the inside of the duct 3 from the middle of the duct 3 through the supply pipe 59.
- the connection position between the supply pipe 59 and the duct 3 is located between the defibrating part 2 side and the rotary drum 4 side in the duct 3 in the manufacturing apparatus 1, and is more than the absorbent particle scattering pipe 36 in the duct 3. It is located downstream.
- the connection position between the supply pipe 59 and the duct 3 is not limited to this.
- the connection position between the supply pipe 59 and the duct 3 may not be the top plate 31 side of the duct 3 but the bottom plate 32 side.
- the presser belt 7 is disposed along the outer peripheral surface 4f adjacent to the downstream side of the position of the duct 3 and located in the space B of the rotating drum 4 There is.
- the space B is set to a negative pressure or pressure zero (atmospheric pressure) weaker than the space A of the rotary drum 4.
- the presser belt 7 is an endless air-permeable or non-air-permeable belt, and is stretched over the rollers 71 and 72 so as to rotate along with the rotation of the rotary drum 4.
- the pressing belt 7 is a breathable belt, it is preferable that the material in the accumulation recess 41 is not substantially allowed to pass through. Even when the pressure in the space B is set to atmospheric pressure by the pressing belt 7, the stack 100 a in the stacking recess 41 can be held in the stacking recess 41 until it is transferred onto the vacuum conveyor 8.
- the vacuum conveyor 8 is disposed below the rotary drum 4 and is set to a weak positive pressure or zero pressure (atmospheric pressure) of the rotary drum 4. It is distribute
- the vacuum conveyor 8 is opposed to an endless air-permeable belt 83 stretched over the drive roller 81 and the driven rollers 82 and 82 and an outer peripheral surface 4 f located in the space C of the rotary drum 4 with the air-permeable belt 83 interposed therebetween. And a vacuum box 84 arranged at a position. On the vacuum conveyor 8, a core wrap sheet 100b made of tissue paper, liquid permeable nonwoven fabric or the like is introduced.
- the manufacturing apparatus 1 further includes a folding guide plate (not shown), a pressing unit 9 in addition to the above-described defibrating unit 2, duct 3, rotating drum 4, supply unit 5, pressing belt 7 and vacuum conveyor 8. And a cutting device 6.
- a folding guide plate (not shown) is disposed downstream of the vacuum conveyor 8.
- the folding guide plate covers both sides along the conveyance direction (Y direction) of the core wrap sheet 100 b on the stack 100 a so as to cover the stack 100 a transferred onto the core wrap sheet 100 b introduced onto the vacuum conveyor 8.
- the pressing unit 9 is disposed downstream of the folding guide plate. In the manufacturing apparatus 1, the pressing unit 9 forms a plurality of recesses 100 e in the stack 100 a covered with the core wrap sheet 100 b. As the pressurizing part 9, for example, in the production of absorbent articles such as sanitary napkins, light incontinence pads, panty liners, diapers and the like, those conventionally used for forming recesses can be used without particular limitation. . In the manufacturing apparatus 1, the pressing unit 9 includes an embossing roll 92 having a plurality of convex portions 91 formed on the circumferential surface, and a receiving roll 93 disposed opposite to the embossing roll 92.
- the emboss roll 92 receives power from a motor such as a motor and rotates in the direction of arrow R6.
- the shape and pattern of the convex portion 91 of the embossing roll 92 can be appropriately selected depending on the application. For example, when manufacturing the absorber 100 in which the recessed part 100e of the pattern shown in FIG. 1 is formed, the several convex part 91 corresponding to the arrangement pattern should just be formed in the surrounding surface of the embossing roll 92.
- the receiving roll 93 is a flat roll whose circumferential surface is smooth, and for example, a roll made of metal or rubber can be used.
- the receiving roll 93 receives power from a motor such as a motor and rotates in the direction of the arrow R7. Moreover, in the manufacturing apparatus 1, the embossing roll 92 and the receiving roll 93 have a heatable structure, and the heating temperature is set by a heating device (not shown) so that the synthetic fiber 10b of the absorber 100 is heat-fused. It is controlled. In the manufacturing apparatus 1, when pressing the accumulation body 100a covered by the core wrap sheet 100b to form the recess 100e, one or both of the embossing roll 92 and the receiving roll 93 are heated to a predetermined temperature by the heating device. Is preferred.
- the cutting device 6 is disposed downstream of the pressing unit 9. In the manufacturing apparatus 1, the cutting device 6 manufactures individual absorbers 100. As the cutting device 6, for example, in the production of absorbent articles such as sanitary napkins, light incontinence pads, panty liners, diapers, etc., those conventionally used for cutting absorbent continuous bodies are used without particular limitations. Can. In the manufacturing apparatus 1, the cutting device 6 is provided with a cutter roll 62 having a cutting blade 61 on the circumferential surface and an anvil roller 63 having a smooth circumferential surface for receiving the cutting blade 61.
- a method of producing the absorber 100 using the above-described production apparatus 1, that is, an embodiment of a method of producing the absorber of the present invention will be described.
- a plurality of sheet pieces 10 bh including the synthetic fiber 10 b and the hydrophilic fiber 10 a are accumulated using the duct 3 as a conveyance unit
- a plurality of sheet pieces 10bh and hydrophilic fibers 10a transported in the transporting step are stacked in the stacking recess 41 serving as the stacking portion, and a constituent member of the absorbent body 100.
- a recess forming step of pressing the part of the aggregate 100a obtained in the integration step to form a recess 100e in the aggregate 100a is provided.
- a fibrillation step of obtaining the hydrophilic fiber 10a by disintegrating the strip-like hydrophilic sheet 10as using the fibrillation machine 21 and a belt-like synthesis including the synthetic fiber 10b The fiber sheet 10bs is cut at a predetermined length in the first direction and the second direction to form a sheet piece 10bh including the synthetic fiber 10b, and the sheet piece 10bh obtained in the cutting step is suctioned. And a suction process for supplying the inside of the duct 3.
- the manufacturing method of the absorber 100 of this embodiment is equipped with the covering process which coats the accumulation object 100a obtained at the accumulation process with a covering sheet.
- the manufacturing method of the absorber 100 of this embodiment is explained in full detail.
- an intake fan (not shown) connected to each of the space A in the rotating drum 4 and the inside of the vacuum box 84 for the vacuum conveyor 8 is operated to a negative pressure.
- a negative pressure By making the space A negative pressure, an air flow for conveying the raw material of the absorber 100 to the outer peripheral surface 4 f of the rotating drum 4 is generated in the duct 3.
- the defibrator 21 and the rotary drum 4 are rotated, and the first cutter roller 53, the second cutter roller 54 and the receiving roller 55 are rotated, and the pressing belt 7 and the vacuum conveyor 8 are operated.
- a belt-like hydrophilic sheet 10as is supplied to the fibrillation machine 21 using the feed roller 23, and the fibrillation step is performed to fibrillate the fiber to obtain the hydrophilic fiber 10a.
- the pair of feed rollers 23, 23 is configured to control the supply speed of the hydrophilic sheet 10as to the fibrillating machine 21.
- the supply of the hydrophilic sheet 10 as to the disintegration device 21 is performed in a controlled manner.
- the hydrophilic sheet 10as supplied to the fibrillation machine 21 is fibrillated and the hydrophilic fibers 10a which are fibrillated fiber materials are disintegrated. It is supplied to the duct 3 from the fiber machine 21.
- the manufacturing method of the absorber 100 has a cutting process separately from a fibrillation process.
- the belt-like synthetic fiber sheet 10bs is formed into a first direction and a second direction using the first cutter roller 53 and the second cutter roller 54. And cut into a predetermined length to form a sheet piece 10bh.
- a first cutter roller 53 and a second cutter roller 54 which cut the sheet by a length, and a receiving roller 55 disposed opposite to the first cutter roller 53 and the second cutter roller 54 are used.
- a band-like synthetic fiber sheet 10bs is introduced between the receiving rollers 55 and cut in the first direction to form a continuous sheet piece 10bh1, and the formed continuous sheet piece 10bh1 is conveyed by the receiving roller 55 and is second
- the sheet is cut in the second direction between the cutter roller 54 and the receiving roller 55 to form the sheet piece 10bh.
- the sheet piece 10bh formed in this manner is cut only in the first direction and the second direction.
- the cutting process of the present embodiment will be specifically described.
- the synthetic fiber sheet 10bs is conveyed using the above-described feed roller (not shown).
- the feed roller is configured to control the transport speed of the synthetic fiber sheet 10bs.
- the transport speed of the synthetic fiber sheet 10bs is controlled and carried out.
- the reception roller 55 which is a flat roller that rotates the synthetic fiber sheet 10bs conveyed by the feed roller in the direction of the arrow R5 via the free roller 56;
- the synthetic fiber sheet 10bs is introduced at a position spaced in the second direction by a plurality of cutter blades 51, 51, 51,... Introduced between the first cutter roller 53 rotating in the direction of arrow R3. Cutting in the first direction.
- a plurality of sheet piece continuous members 10bh1 extending in the first direction and juxtaposed in the second direction (X direction) are formed.
- the average width of the continuous sheet piece 10bh1 formed in the cutting step is preferably 0.1 mm or more and 10 mm or less from the viewpoint of securing the dimensions necessary for the sheet piece to exhibit a predetermined effect, etc. .3 mm or more and 6 mm or less is more preferable, and 0.5 mm or more and 5 mm or less is particularly preferable.
- the width of the continuous sheet piece 10bh1 cut by the first cutter roller 53 corresponds to the length of the short side of the finally formed sheet piece 10bh.
- the width of the continuous sheet piece 10bh1 cut by the first cutter roller 53 may be cut so as to correspond to the length of the longitudinal side of the finally formed sheet piece 10bh.
- the average width of the continuous sheet piece 10bh1 cut by the first cutter roller 53 is preferably 0.3 mm or more and 30 mm or less, more preferably 1 mm or more and 15 mm or less, and 2 mm or more It is particularly preferable that the diameter is 10 mm or less.
- the formed plurality of continuous sheet pieces 10bh1 are conveyed on the circumferential surface of the receiving roller 55 rotating in the direction of the arrow R5, conveyed between the receiving roller 55 and the nip roller 57, and received via the nip roller 57. It is introduced between 55 and the second cutter roller 54.
- the average length of the sheet pieces formed in the cutting step is preferably 0.3 mm or more and 30 mm or less, for example, 1 mm or more and 15 mm, from the viewpoint of securing dimensions necessary for the sheet pieces to exhibit a predetermined effect. It is more preferable that it is the following, and it is especially preferable that it is 2 mm or more and 10 mm or less.
- the length of the sheet piece 10bh cut by the second cutter roller 54 corresponds to the length of the side in the longitudinal direction of the sheet piece 10bh.
- the length of the sheet piece 10bh cut by the second cutter roller 54 may be cut so as to correspond to the length of the side of the sheet piece 10bh in the short direction.
- the length (width) of the sheet piece 10bh cut by the cutter roller 54 is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 6 mm or less, and more preferably 0.5 mm or more and 5 mm It is particularly preferred that
- the strip-like synthetic fiber sheet 10bs is cut at a predetermined length in the first direction and the second direction to obtain the sheet piece 10bh including the synthetic fiber 10b. It is easy to adjust the size of the sheet piece 10bh to the intended size. In this manner, sheet pieces of the intended size can be formed with high accuracy, and therefore, it is possible to efficiently and continuously manufacture an absorbent body having an intended absorption performance. Even if the sheet piece 10bh is formed by cutting in the first direction or the second direction using the first cutter roller 53 having the cutter blade 51 or the second cutter roller 54 having the cutter blade 52, it is formed In the sheet piece 10bh to be cut, fluff due to the synthetic fiber may be generated by cutting. Further, as the cutter blades 51 and 52 wear and deteriorate with long-term use, the synthetic fiber sheet 10bs may not be cut well, and a plurality of sheet pieces 10bh may be connected.
- a suction step of suctioning and feeding the sheet piece 10bh obtained by cutting with the cutter rollers 53 and 54 into the inside of the duct 3 is performed.
- the lower side of the second cutter roller 54 that is, the downstream side of the rotation direction of the second cutter roller 54 (the direction of the arrow R4 shown in FIG. 5) than the closest point of contact between the second cutter roller 54 and the receiving roller 55.
- the suction port 581 of the suction nozzle 58 is disposed, the plurality of sheet pieces 10bh formed by cutting with the second cutter roller 54 and the receiving roller 55 can be suctioned efficiently.
- the sheet piece 10bh supplied to the inside of the duct 3 and the hydrophilic fiber 10a are conveyed using the duct 3 to the accumulation recess 41 as the accumulation portion.
- the sheet piece 10bh with fluff formed on the periphery is formed or a plurality of sheet pieces 10bh are in a row
- the sheet pieces 10bh in which the fluffs are formed are connected to each other, and there is a possibility that a block 10K of the sheet pieces 10bh as shown in FIG. 6 is formed.
- the sheet piece 10bh and the hydrophilic fiber 10a are brought into contact in the air flow generated inside the duct 3 so that the sheet piece 10bh and the hydrophilic fiber 10a are scattered in a mixed state. Transport by air flow.
- the hydrophilic fibers 10a and the sheet pieces 10bh are respectively supplied and transported at different positions along the flow direction of the air flow in the duct 3.
- the hydrophilic fibers 10a are supplied into the flow path 30 of the duct 3 from the upstream side of the duct 3, and the hydrophilic fibers 10a are made into sheet pieces 10bh by the air flow flowing in the flow path 30.
- the hydrophilic fibers 10a are conveyed toward the outer peripheral surface 4 f of the rotary drum 4 from the upstream side in the flow direction of the air flow from the position where the
- the plurality of sheet pieces 10bh suctioned in the suction step are positioned halfway along the flow direction of the air flow in the duct 3 through the supply pipe 59 of the suction nozzle 58. It is supplied into the flow path 30 of the duct 3 from the top plate 31 side of the duct 3. In the flow passage 30 of the duct 3, an air flow for conveying the hydrophilic fibers 10 a which are the raw materials of the absorber 100 toward the outer peripheral surface 4 f of the rotary drum 4 has already been generated.
- the transporting speed Va of the hydrophilic fiber 10a is different, the lump 10K of the sheet piece 10bh easily contacts the hydrophilic fiber 10a which has already flowed, and is easily separated into the individual sheet pieces 10bh.
- the velocity component Va1 to the downstream side in the transport velocity Va of the hydrophilic fiber 10a is larger than the velocity component Vb1 to the downstream side in the transport velocity Vb of the sheet piece 10bh.
- the velocity component Va1 on the downstream side of the transport velocity Va of the hydrophilic fiber 10a is the velocity component Vb1 in the horizontal direction when the transport velocity Va is projected as viewed from the side of the duct 3 as shown in FIG. And the velocity component Va2 in the vertical direction in the horizontal direction.
- the velocity component Vb1 to the downstream side at the conveying velocity Vb of the sheet piece 10bh is the velocity component in the horizontal direction when the duct 3 is viewed from the side and projected as shown in FIG. It is a horizontal velocity component when it is decomposed into Vb1 and a vertical velocity component Vb2.
- the hydrophilic fiber 10a is supplied from the upstream side of the sheet piece 10bh, when the sheet piece 10bh and the hydrophilic fiber 10a merge, the speed of the downstream side of the hydrophilic fiber 10a
- the component Va1 is larger than the velocity component Vb1 to the downstream side of the sheet piece 10bh.
- the sheet piece 10 bh is supplied to the flow path 30 of the duct 3 by the supply pipe 59 extending in the direction intersecting the flow direction of the air flow of the duct 3. Therefore, the moving speed of the sheet piece 10bh immediately before being supplied to the flow path 30 of the duct 3 does not increase the speed component to the downstream side in the flow direction of the duct 3.
- the velocity component Va1 tends to be larger than the velocity component Vb1 to the downstream side in the conveyance velocity Vb of the sheet piece 10bh. Therefore, even if the lump 10K of the sheet piece 10bh is unintentionally supplied into the flow path 30 of the duct 3, the hydrophilic fiber 10a and the lump 10K of the sheet piece 10bh unintentionally supplied are already flowing and Contact.
- the lump 10K of the sheet piece 10bh in contact with the hydrophilic fiber 10a is, as shown in FIG. 6, the sheet piece 10bh due to excessive entanglement or cutting failure due to fluff formed at the time of cutting by impact of contact with the hydrophilic fiber 10a.
- the parts where the parts are connected are understood, and the sheet pieces 10bh are separated and conveyed toward the downstream side in the scattering state.
- the hydrophilic fibers 10a and the sheet pieces 10bh are separated into the individual sheet pieces 10bh and are transported by the air flow while being mixed in a scattered state, so the sheet pieces 10bh and the hydrophilic fibers 10a are uniformly distributed. It is easy to manufacture stably the accumulation object 100a of the absorber 100 which carried out.
- the absorbent body 100 is further supplied with the absorbent particles 10c inside the duct 3 in addition to the hydrophilic fibers 10a.
- the sheet piece 10bh and the absorbent particle 10c are conveyed while the sheet piece 10bh and the absorbent particle 10c are conveyed to the accumulation recess 41.
- the sheet piece 10bh is transported in a scattered state by bringing the sheet piece 10bh into contact in the air flow.
- the sheet piece 10bh, the absorbent particle 10c, and the hydrophilic fiber 10a are transported by an air flow in a scattered state where the three are mixed.
- the absorbent particles 10c and the sheet pieces 10bh are supplied at different positions along the air flow direction, and the absorbent particles 10c are supplied from the air pieces rather than the sheet pieces 10bh.
- Supply and transport upstream in the flow direction That is, as shown in FIG. 3 and FIG. 4, the absorbent particle scattering tube 36 is disposed on the upstream side of the duct 3 with respect to the suction nozzle 58.
- the absorbent particles 10c are supplied from the upstream side of the duct 3 into the flow path 30 of the duct 3 from the suction nozzle 58, and the plurality of sheet pieces 10bh subjected to the suction step are It supplies in the flow path 30 of the duct 3 from the downstream side of the duct 3 rather than the arrangement position.
- the absorbent particles 10c supplied from the absorbent particle scattering tube 36 into the flow passage 30 of the duct 3 are supplied with a plurality of sheet pieces 10bh by the air flow flowing in the flow passage 30 of the duct 3 To the outer peripheral surface 4 f of the rotary drum 4 from the upstream side in the flow direction of the air flow from the position where
- the conveyance speed Vb of the sheet piece 10bh is different from the conveyance speed Vc of the absorbent particle 10c.
- the velocity component Vc1 to the downstream side at the transport velocity Vc of the absorbent particles 10c is larger than the velocity component Vb1 to the downstream side at the transport velocity Vb of the sheet piece 10bh.
- the velocity component Vc1 on the downstream side at the transport velocity Vc of the absorbent particle 10c is the velocity component Va1 in the horizontal direction when the transport velocity Va is projected and viewed as viewed from the side of the duct 3 as shown in FIG.
- the absorbent particle 10c is supplied from the upstream side of the sheet piece 10bh, so when the sheet piece 10bh and the absorbent particle 10c merge, the velocity component Vc1 on the downstream side of the absorbent particle 10c is It is larger than the velocity component Vb1 to the downstream side of the sheet piece 10bh. Therefore, even if the lump 10K of the sheet piece 10bh is unintentionally supplied into the flow path 30 of the duct 3, the lump 10K of the sheet piece 10bh comes in contact with the absorbent particles 10c already flowing. As shown in FIG.
- the lump 10K of the sheet piece 10bh in contact with the absorbent particle 10c is further unentangled by the fluff formed at the time of cutting by the impact of contact with the absorbent particle 10c, and individual sheets It is separated into pieces 10bh and transported in the scattering state toward the downstream side.
- the lump 10K of the sheet piece 10bh contacts the hydrophilic fiber 10a in the air flow and also contacts the absorbent particles 10c in the air flow so that the sheet pieces 10bh can be separated more easily by the individual sheet pieces 10bh.
- the fibers 10a, the sheet pieces 10bh and the absorbent particles 10c are transported by the air flow while being mixed in a scattered state, so an aggregate of the absorbent 100 in which the hydrophilic fibers 10a, the sheet pieces 10bh and the absorbent particles 10c are uniformly distributed. It is easy to manufacture 100a stably. In particular, since the absorbent particles 10c have a larger specific gravity than the sheet pieces 10bh, the individual sheet pieces 10bh are more easily separated.
- the sheet pieces 10bh and the hydrophilic fibers 10a but also the absorbent particles 10c are accumulated in the accumulation recess 41 disposed on the outer peripheral surface 4f of the rotary drum 4 to perform an accumulation step to obtain the accumulation body 100a.
- the stacking step since the separated sheet pieces 10bh are separated and transported in a scattered state in the conveying step, the sheet pieces 10bh are uniformly distributed over substantially the entire area of the stack 100a in plan view. Mixed and accumulated.
- the sheet piece 10bh is conveyed so as to be disposed substantially uniformly over the entire area of the accumulation recess 41 of the rotary drum 4, and the hydrophilic fiber 10a, the sheet piece 10bh and the absorbent particle 10c are mixed and accumulated.
- An aggregate 100 a of raw materials of the absorbent 100 is formed.
- the accumulation body 100 a thus formed in the accumulation recess 41 is continuously manufactured over the entire circumference of the rotary drum 4 in the circumferential direction (2Y direction).
- the integrated body 100a in which the hydrophilic fibers 10a, the synthetic fibers 10b, and the absorbent particles 10c are accumulated in the accumulation recess 41 is obtained, as shown in FIG. While pressing the stack 100 a in the stacking recess 41 by the pressing belt 7 disposed on the outer peripheral surface 4 f located in the space B of the drum 4, the stack 100 a is conveyed onto the vacuum conveyor 8.
- a covering step of covering the aggregate 100a with a core wrap sheet 100b as a covering sheet is performed. Specifically, as shown in FIG. 3, one side of one of both side portions of core wrap sheet 100b along the transport direction Y is placed on the aggregate 100a in the width direction X by a fold guide plate (not shown). Fold back to Then, the other side portion is folded inward in the width direction X by the folding guide plate on the stack 100a, and the stack 100a is covered with the core wrap sheet 100b to manufacture a band-like absorber 100.
- a part of the integrated body 100a obtained in the integration step is pressurized to perform a concave portion forming step of forming the concave portion 100e in the integrated body 100a.
- a portion of the stack 100a is pressed from above the core wrap sheet 100b against the band-shaped absorber 100 covered with the core wrap sheet 100b to form a recess 100e in the stack 100a.
- a plurality of convex portions 91 are formed on the circumferential surface, and the embossing roll 92 rotates in the arrow R6 direction, and the receiving roll 93 rotates in the arrow R7 direction whose circumferential surface is smooth.
- a band-shaped absorber 100 is introduced, and a portion of the absorber 100 corresponding to the convex portion 91 of the embossing roll 92 is pressed to form a plurality of recesses 100 e on the surface of the absorber 100.
- the concave portion forming step since the sheet piece 10bh is substantially uniformly present in the whole area of the stack 100a in plan view, the concave portion 100e can be easily formed. That is, if lumps 10K of sheet pieces 10bh are locally present in the accumulated body 100a, the formability of the concave portion 100e at that portion is reduced, but in the manufacturing method of the present embodiment, the concave portion 100e is It becomes possible to suppress the fall of moldability.
- pressure is preferably applied while heating to form a plurality of recesses 100 e on the surface of the absorber 100.
- the synthetic fiber 10b at the heating location is easily thermally fused, and the recess 100e is further easily formed.
- the average length of the sheet piece 10bh formed by cutting in the first direction and the second direction is the same as the concave portions 100e adjacent to each other among the plurality of concave portions 100e formed in the concave portion forming step. It is preferable to cut so as to be longer than the shortest distance d.
- one sheet piece 10bh may be fixed to a plurality of concave portions 100e, so that it is manufactured. The shape of the absorber 100 is less likely to collapse.
- the strip-shaped absorber 100 having the concave portion 100e formed on the surface is cut by the cutting device 6 at a predetermined interval in the transport direction Y to manufacture the individual absorbers 100.
- the absorbent body 100 manufactured in this manner includes an aggregate 100 a in which the hydrophilic fibers 10 a, the sheet pieces 10 bh and the absorbent particles 10 c are mixed and accumulated. And while the absorber 100 is coat
- the plurality of sheet pieces 10 bh and the hydrophilic fibers 10 a are accumulated using the duct 3 as the conveyance unit And conveying the plurality of sheet pieces 10bh and the hydrophilic fibers 10a conveyed in the conveying step to the accumulating concave portion 41 to obtain the accumulation body 100a. There is. Then, the sheet piece 10bh and the hydrophilic fiber 10a are brought into contact with each other in the air flow generated inside the duct 3 so that the sheet piece 10bh and the hydrophilic fiber 10a are scattered in a mixed state.
- the sheet bundle 10b is easily transported to form an aggregate 100a in which the sheet pieces 10bh are dispersed.
- the manufacturing method of this embodiment using the manufacturing apparatus 1 is equipped with the recessed part formation process of pressurizing a part of integrated body 100a, and forming the recessed part 100e in the integrated body 100a. Therefore, since the sheet pieces 10bh are dispersed in the stacked body 100a, the absorber 100 in which the formability of the concave portion 100e by pressing is improved can be stably manufactured.
- the concave portion 100 e of the absorber 100 is stably formed, the coarse / dense structure of the constituent fibers of the absorber 100 can be controlled, and the absorption performance of the absorber 100 can be controlled.
- the pressure is applied in a state in which the stacked body 100a is covered with the core wrap sheet 100b as a covering sheet, that is, in a state covered with the core wrap sheet 100b, the shape retention of the absorber 100 is improved.
- FIG. 8 shows a cross-sectional view of a napkin 101 manufactured by the method of manufacturing an absorbent article of the present invention.
- FIG. 8 shows a cross-sectional view of a napkin 101 manufactured by the method of manufacturing an absorbent article of the present invention.
- it demonstrates focusing on the point which is different from the manufacturing method of the absorber 100 mentioned above, and abbreviate
- the napkin 101 includes a liquid-permeable top sheet 102 forming a skin-facing surface, a back sheet 103 forming a non-skin-facing surface, and an absorbent 100A interposed between the two sheets 102 and 103. It is equipped.
- the napkin 101 When the napkin 101 is worn, the napkin 101 has a long shape in the longitudinal direction corresponding to the longitudinal direction of the wearer, and the longitudinal direction corresponds to the longitudinal direction of the absorbent 100A, and the width direction orthogonal to the longitudinal direction is It corresponds to the width direction X of the absorber 100A.
- the shape of the napkin 101 in plan view is not particularly limited, but is formed symmetrically with respect to a center line CL which is long in the longitudinal direction and extends in the longitudinal direction.
- the napkin 101 has a recess 100e2 formed by pressing a part of the napkin 101 from above the top sheet 102, as shown in FIG. 8, instead of the recess 100e of the absorbent body 100 described above. There is.
- the concave portion 100 e 2 is formed so as to be recessed toward the back sheet 103 from the side of the top sheet 102 facing the wearer's skin.
- the concave portion 100e2 is formed so that the skin facing surface side of the absorbent body 100A of the napkin 101 is integrally recessed with the top sheet 102 in a concave shape.
- the shape of the concave portion 100e2 when the napkin 101 is viewed in plan from the top sheet 102 side is an all-round groove in which concave grooves formed in a linear shape are annularly connected as a whole.
- the shape in plan view of the concave portion 100e2 is not particularly limited, and the same shape / arrangement as what is referred to as a leak-proof groove or the like can be employed in this type of absorbent article, and it is not limited to the linear concave groove.
- a large number of recesses 100 e 2 of various shapes such as a circle, an ellipse, a square, a rectangle, and a triangle may be intermittently arranged.
- various materials conventionally used for absorbent articles such as sanitary napkins can be used without particular limitation.
- the manufacturing method of the napkin 101 which is one Embodiment of the manufacturing method of the absorbent article of this invention is demonstrated.
- absorber 100A with which napkin 101 is provided absorber 100A of the composition which removed crevice 100e from absorber 100 manufactured by the manufacturing method of absorber 100 mentioned above is used. Therefore, according to the method of manufacturing the napkin 101, in the method of manufacturing the absorbent body 100, the concave portion 100e is not formed in the integrated body 100a constituting the absorbent body 100 by pressing the absorbent body 100, and the surface sheet of the napkin 101 A portion of the stack 100a is pressed from above the 102 to form a recess 100e2 in the stack 100a.
- the manufacturing method of the napkin 101 is demonstrated.
- the belt-like top sheet 102 supplied from the raw fabric roll is introduced by the introduction roll, and the upper surface side of the absorbent 100A is introduced.
- a surface sheet polymerization step of overlapping the belt-like surface sheet 102 is performed.
- the belt-like surface sheet 102 superimposed on the absorber 100A is conveyed between the anvil roll and the emboss roll having a convex portion corresponding to the concave portion 100e2 on the roll surface.
- the concave part formation process which pressurizes the surface sheet 102 and the absorber 100A toward the lower surface side of the absorber 100A from the top of the surface sheet 102 using the said convex part, and forms the recessed part 100e2 which is dented integrally I do.
- the recess 100e2 is formed in a part of the integrated body 100a of the absorber 100A.
- the formability of the recess 100e2 of the stack 100a is not easily reduced, and the formability of the recess 100e2 is improved 101 can be manufactured stably.
- a strip-like back sheet 103 supplied from a raw fabric roll is introduced by a introducing roll, and a back-sheet polymerization step is performed in which the strip-like back sheet 103 is superposed on the lower surface side of the absorber 100A integrated with the top sheet 102. .
- the absorber 100A sandwiched between the top sheet 102 and the back sheet 103 is sealed in a shape corresponding to the product shape to form a continuous body of the napkin 101.
- the continuous body of the napkin 101 is cut along the sealed portion to manufacture the individual napkins 101.
- the absorber 100A which does not have the recessed part 100e is used as an absorber, you may use the absorber 100 which has the recessed part 100e.
- the manufacturing method of the napkin 101 provided with the absorber 100 having the recess 100 e includes, for example, a recess forming step of pressing the part of the stack 100 a constituting the absorber 100 to form the recess 100 e in the stack 100 a
- a recess forming step may be performed in which a portion of the stack 100a is pressed from above the top sheet 102 of the napkin 101 to form the recess 100e2 in the stack 100a.
- the present invention is not limited to the above embodiment, and can be appropriately modified.
- absorptive particle 10c is supplied using absorptive particle dispersion tube 36, it is not necessary to supply absorptive particle 10c. That is, in the transport step of the present embodiment, the hydrophilic fibers 10a and the absorbent particles 10c are brought into contact with the lump 10K of the sheet piece 10bh supplied unintentionally and separated into individual sheet pieces 10bh. Only the hydrophilic fibers 10a may be brought into contact with and separated from the lump 10K of the piece 10bh.
- pressing is performed in a state in which the core wrap sheet 100b is interposed as a covering sheet for covering the accumulation body 100a to form the depression 100e, but the accumulation body 100a is not covered with the covering sheet Directly to form a recess 100e.
- a concave portion may be formed by pressing in a state in which another sheet disposed on the skin facing surface side of the absorber 100 is interposed.
- the hydrophilic fiber 10a is supplied on the upstream side rather than the position which supplies the sheet piece 10bh, on the downstream side than the position which the hydrophilic fiber 10a supplies the sheet piece 10bh It may be supplied.
- the position for supplying the hydrophilic fiber 10a is on the downstream side of the position for supplying the sheet piece 10bh, even if the lump 10K of the sheet piece 10bh is unintentionally supplied, the sheet piece 10bh and the hydrophilic fiber 10a When the two pieces merge, the lump 10K of the sheet piece 10bh flowing from the upstream side comes into contact with the hydrophilic fiber 10a in the air flow to separate the lump 10K into the individual sheet pieces 10bh and scatter it It will be carried by the air stream. Therefore, it is easy to form the accumulation body 100a in which the sheet piece 10bh containing the synthetic fiber 10b is dispersed, and it is possible to stably manufacture the absorber 100 in which the formability of the concave portion 100e by pressure is improved.
- the absorbent particles 10c are supplied on the upstream side of the position for supplying the sheet piece 10bh, but the absorbent particles 10c are provided on the downstream side of the position for supplying the sheet piece 10bh It may be supplied.
- the position for supplying the absorbent particles 10c is on the downstream side of the position for supplying the sheet pieces 10bh, even if the lump 10K of the sheet pieces 10bh is unintentionally supplied, the sheet pieces 10bh and the absorbent particles 10c
- lumps 10K of sheet pieces 10bh flowing from the upstream side come into contact with absorbent particles 10c in the air flow, the lumps 10K are separated into individual sheet pieces 10bh and scattered. It will be carried by the air stream. Therefore, it is easy to form the accumulation body 100a in which the sheet piece 10bh containing the synthetic fiber 10b is dispersed, and it is possible to stably manufacture the absorber 100 in which the formability of the concave portion 100e by pressure is improved.
- the synthetic fiber sheet 10bs is cut using the first cutter roller 53 and the second cutter roller 54, but instead of the two cutter rollers, in the first direction
- the synthetic fiber sheet 10bs may be cut using a single cutter roller provided with the cutter blade 51 to be cut and the cutter blade 52 to be cut in the second direction on the same circumferential surface.
- the one cutter roller it is preferable to use one receiving roller disposed opposite to the one cutter roller.
- the suction port 581 of the suction nozzle 58 is preferably disposed below the one cutter roller.
- a first cutter roller 53 provided with a cutter blade 51 for cutting in a first direction
- a second cutter roller 54 provided with a cutter blade 52 for cutting in a second direction
- a belt-shaped synthetic fiber sheet 10bs is formed into a predetermined length in the first direction and the second direction using one receiving roller 55 disposed to face the first cutter roller 53 and the second cutter roller 54.
- the sheet is cut to produce a sheet piece 10bh containing the synthetic fiber 10b.
- the synthetic fiber sheet 10bs may be cut using different receiving rollers disposed opposite to the first cutter roller 53 and the second cutter roller 54 to manufacture the sheet piece 10bh.
- a first cutter roller 53 provided with a plurality of cutter blades 51 arranged at equal intervals, and a plurality of cutters arranged at equal intervals, respectively.
- the synthetic fiber sheet 10bs is cut using the second cutter roller 54 provided with the blade 52 to produce sheet pieces 10bh of the same size, but a plurality of cutter blades so as to have two or more types of intervals 51 is used to cut the synthetic fiber sheet 10 bs by using the first cutter roller 53 provided with 51 or the second cutter roller 54 provided with a plurality of cutter blades 52 so as to have two or more kinds of intervals.
- sheet pieces 10bh of two or more types of sizes can be formed, but unlike manufacturing using a cutter mill method, sheet pieces of the intended size can be formed with high accuracy.
- An absorber with targeted absorption performance can be efficiently and continuously manufactured.
- the synthetic fiber sheet 10bs is cut using the first cutter roller 53 and the second cutter roller 54 to manufacture a sheet piece 10bh.
- the synthetic fiber sheet 10bs is cut using a press equipped with the cutter blade 51 that cuts in the first direction without using a cutter roller and a press equipped with the cutter blade 52 that cuts in the second direction.
- the sheet piece 10bh may be manufactured.
- the absorbent particles 10c are supplied into the duct 3 using the absorbent particle scattering tube 36.
- the supply of the absorbent particles 10c is absorbent It is not limited to the particle scattering tube 36, and may be any one that can supply the absorbent particles 10c.
- the shape of the manufactured aggregate 100 a may be flexibly changed by changing the shape of the accumulation recess 41. Moreover, you may hydrophilize the fiber used for the synthetic fiber 10b.
- a method of manufacturing an absorbent for an absorbent article comprising a synthetic fiber and a hydrophilic fiber, wherein a plurality of sheet pieces containing the synthetic fiber and the hydrophilic fiber are transported to the accumulation unit using the transport unit.
- a method for producing an absorbent wherein the sheet pieces and the hydrophilic fibers are transported by the air flow in a scattered state in which the sheet pieces and the hydrophilic fibers are mixed by bringing them into contact with the fibers.
- a covering step of covering the accumulation body obtained in the accumulation step with a covering sheet, and in the recess forming step, pressing the accumulation body from above the covering sheet to form a recess in the accumulation body The manufacturing method of the absorber as described in ⁇ 1>.
- ⁇ 3> The absorbent body according to ⁇ 1> or ⁇ 2>, wherein the sheet piece and the hydrophilic fiber are respectively supplied and conveyed at different positions along the flow direction of the air flow in the conveyance unit in the conveyance step. Manufacturing method.
- the hydrophilic fiber is supplied and conveyed on the upstream side in the flow direction with respect to the position where the sheet pieces are supplied, and the method according to ⁇ 3>.
- the conveying step when the sheet piece and the hydrophilic fiber merge in the conveying portion, the conveying speed of the sheet piece is different from the conveying speed of the hydrophilic fiber. 4> The manufacturing method of the absorber as described in 4>.
- the absorbent particles are further supplied to the inside of the transport unit, and the sheet piece and the absorbent particles are brought into contact in an air flow to make the sheet piece, the absorbent particles, and the hydrophilicity.
- the conveyance step when the sheet piece and the absorbent particle merge in the conveyance unit, the conveyance speed of the sheet piece is different from the conveyance speed of the absorbent particle.
- the recess forming step the method for manufacturing an absorber according to any one of ⁇ 1> to ⁇ 9>, wherein the accumulated body is pressurized while being heated to form the recess.
- ⁇ 12> Forming a plurality of recesses in the integrated body in the recess forming step; The absorption according to ⁇ 11>, wherein the average length of the sheet piece formed in the cutting step is longer than the shortest distance between adjacent ones of the plurality of recesses formed in the recess forming step. How to make the body.
- the average length of each of the sheet pieces formed in the cutting step is preferably 0.3 mm or more and 30 mm or less, more preferably 1 mm or more and 15 mm or less, and particularly preferably 2 mm or more and 10 mm or less.
- the average width of each of the sheet pieces formed in the cutting step is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 6 mm or less, and 0.5 mm or more and 5 mm or less
- the method for producing an absorbent according to any one of ⁇ 11> to ⁇ 13>, wherein ⁇ 15> A method of manufacturing an absorbent article comprising a liquid-permeable top sheet forming a skin contact surface, a back sheet forming a non-skin contact surface, and an absorbent interposed between these two sheets, And conveying the plurality of sheet pieces including the hydrophilic fiber to the accumulation unit using the conveyance unit, and collecting the plurality of sheet pieces and the hydrophilic fibers conveyed in the conveyance step; And a step of stacking the surface sheet on the upper surface side of the stack, and a step of stacking the surface sheet on the top surface of the stack, and the back sheet on the bottom surface of the stack.
- the sheet piece and the hydrophilic fiber In contact, the sheet piece and the hydrophilic fibers, conveyed by the air flow in a scattered state in which both are mixed, the manufacturing method of the absorbent article.
- the concave portion forming step the method of manufacturing the absorbent article according to ⁇ 15>, wherein the stacked body is pressed from above the surface sheet superimposed on the stacked body to form a concave portion in the stacked body.
- the absorbent body comprising a covering step of covering the accumulation obtained in the accumulation step with a covering sheet, and covering the accumulation with the covering sheet in the front sheet polymerization step and the back sheet polymerization step.
- the sheet piece and the hydrophilic fiber are respectively supplied and conveyed at different positions along the flow direction of the air flow in the conveying portion, according to any one of ⁇ 15> to ⁇ 17>.
- the manufacturing method of the absorbent article as described.
- the transport step the method of manufacturing the absorbent article according to ⁇ 21>, wherein the sheet piece and the absorbent particles are supplied and transported at different positions along the flow direction.
- the transport step the method of manufacturing the absorbent article according to ⁇ 22>, wherein the position to which the absorbent particles are supplied is upstream of the position to which the sheet piece is supplied in the flow direction.
- the conveyance step when the sheet piece and the absorbent particle merge in the conveyance unit, the conveyance speed of the sheet piece is different from the conveyance speed of the absorbent particle.
- the concave portion forming step the method of manufacturing the absorbent article according to any one of ⁇ 15> to ⁇ 24>, wherein the stacked body is pressurized while being heated to form the concave portion.
- ⁇ 26> The cutting step of cutting the strip-like synthetic fiber sheet containing the synthetic fibers in a first direction and a second direction intersecting the first direction with a predetermined length to form the sheet piece, ⁇ 15
- ⁇ 27> In the concave portion forming step, a plurality of concave portions are formed in the stacked body, and the average length of the sheet pieces formed in the cutting step is the adjacent one among the plurality of concave portions formed in the concave portion forming step.
- the manufacturing method of the absorbent article as described in said ⁇ 26> longer than the shortest distance of recessed parts.
- the average length of each of the sheet pieces formed in the cutting step is preferably 0.3 mm or more and 30 mm or less, more preferably 1 mm or more and 15 mm or less, and particularly preferably 2 mm or more and 10 mm or less
- the average width of each of the sheet pieces formed in the cutting step is preferably 0.1 mm or more and 10 mm or less, more preferably 0.3 mm or more and 6 mm or less, and 0.5 mm or more and 5 mm or less
- the absorber which the moldability of the recessed part formed by pressurizing can improve can be manufactured stably.
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Abstract
Description
本発明の製造方法は、合成繊維及び親水性繊維を含む吸収体及び該吸収体を具備する吸収性物品の製造方法である。本発明で製造する吸収体は、吸収性物品用の吸収体である。吸収性物品とは、主として尿、経血等の身体から排泄される体液を吸収保持するために用いられるものである。吸収性物品には、例えば使い捨ておむつ、生理用ナプキン、失禁パッド、パンティライナー等が包含されるが、これらに限定されるものではなく、人体から排出される液の吸収に用いられる物品を広く包含する。吸収性物品は、典型的には、液透過性の表面シート、液不透過性又は撥水性の裏面シート及び両シート間に介在配置された液保持性の吸収体を具備している。該吸収体が、本発明の吸収体の製造方法で形成された吸収体である。
また、後述する第1方向とは、搬送方向Yに延びる方向であり、搬送方向Yとのなす角が45度未満の範囲で延びる方向を意味している。本実施形態では、第1方向は搬送方向Yと平行な方向に一致している。
また、後述する第2方向とは、第1方向に交差する方向である。本実施形態では、第2方向は、第1方向に直交する方向であり、搬送する合成繊維シート10bs及び吸収体100の幅方向Xと平行な方向に一致している。
本実施態様の吸収体100の製造方法は、図3及び図4に示すように合成繊維10bを含む複数のシート片10bhと、親水性繊維10aとを、搬送部としてのダクト3を用いて集積部としての集積用凹部41まで搬送する搬送工程と、搬送工程で搬送された複数のシート片10bh及び親水性繊維10aを、集積部である集積用凹部41に集積し、吸収体100の構成部材である集積体100aを得る集積工程と、集積工程で得られた集積体100aの一部を加圧して該集積体100aに凹部100eを形成する凹部形成工程とを備えている。また、本実施態様の吸収体100の製造方法は、解繊機21を用いて帯状の親水性シート10asを解繊して親水性繊維10aを得る解繊工程と、合成繊維10bを含む帯状の合成繊維シート10bsを、第1方向と第2方向とに所定の長さで切断して合成繊維10bを含むシート片10bhを形成する切断工程と、該切断工程で得られたシート片10bhを吸引してダクト3の内部に供給する吸引工程とを備えている。また、本実施態様の吸収体100の製造方法は、集積工程で得られた集積体100aを、被覆シートで被覆する被覆工程を備えている。以下、本実施態様の吸収体100の製造方法について詳述する。
例えば、上述した吸収体100の製造方法においては、吸収性粒子散布管36を用いて吸収性粒子10cを供給しているが、吸収性粒子10cを供給しなくてもよい。即ち、本実施形態の搬送工程では、親水性繊維10a及び吸収性粒子10cを意図せずに供給されたシート片10bhの塊10Kに接触させて個々のシート片10bhに分離させているが、シート片10bhの塊10Kに親水性繊維10aのみを接触させて分離させてもよい。
合成繊維及び親水性繊維を含む吸収性物品用の吸収体の製造方法であって、前記合成繊維を含む複数のシート片と、前記親水性繊維とを、搬送部を用いて集積部まで搬送する搬送工程と、前記搬送工程で搬送された複数の前記シート片及び前記親水性繊維を、前記集積部に集積し、吸収体の構成部材である集積体を得る集積工程と、前記集積工程で得られた前記集積体の一部を加圧して該集積体に凹部を形成する凹部形成工程とを備え、前記搬送工程では、前記搬送部内に発生させた空気流中で前記シート片と前記親水性繊維とを接触させて、該シート片と該親水性繊維とを、両者が混合された飛散状態で該空気流によって搬送する、吸収体の製造方法。
<2>
前記集積工程で得られた前記集積体を被覆シートで被覆する被覆工程を備え、前記凹部形成工程では、前記被覆シートの上から前記集積体を加圧して該集積体に凹部を形成する、前記<1>に記載の吸収体の製造方法。
<3>
前記搬送工程では、前記搬送部における空気流の流れ方向に沿う異なる位置で、前記シート片と前記親水性繊維とをそれぞれ供給して搬送する、前記<1>又は<2>に記載の吸収体の製造方法。
<4>
前記搬送工程では、前記親水性繊維を、前記シート片を供給する位置よりも前記流れ方向の上流側で供給して搬送する、前記<3>に記載の吸収体の製造方法。
<5>
前記搬送工程では、前記シート片と前記親水性繊維とが前記搬送部内で合流する際に、該シート片の搬送速度と該親水性繊維の搬送速度とが異なっている、前記<3>又は<4>に記載の吸収体の製造方法。
<6>
前記搬送工程では、前記搬送部の内部に吸収性粒子が更に供給され、空気流中で、前記シート片と該吸収性粒子とを接触させて、該シート片と該吸収性粒子と前記親水性繊維とを、三者が混合された飛散状態で該空気流によって搬送する、前記<1>~<5>の何れか1に記載の吸収体の製造方法。
<7>
前記搬送工程では、前記流れ方向に沿う異なる位置で、前記シート片と前記吸収性粒子とをそれぞれ供給して搬送する、前記<6>に記載の吸収体の製造方法。
<8>
前記搬送工程では、前記吸収性粒子を供給する位置は、前記シート片を供給する位置よりも前記流れ方向の上流側である、前記<7>に記載の吸収体の製造方法。
<9>
前記搬送工程では、前記シート片と前記吸収性粒子とが前記搬送部内で合流する際に、該シート片の搬送速度と該吸収性粒子の搬送速度とが異なっている、前記<7>又は<8>に記載の吸収体の製造方法。
<10>
前記凹部形成工程において、前記集積体を加熱しながら加圧して、前記凹部を形成する、前記<1>~<9>の何れか1に記載の吸収体の製造方法。
<11>
前記合成繊維を含む帯状の合成繊維シートを、第1方向と該第1方向に交差する第2方向とに所定の長さで切断して前記シート片を形成する切断工程を備える、前記<1>~<10>の何れか1に記載の吸収体の製造方法。
<12>
前記凹部形成工程において、前記集積体に複数の凹部を形成し、
前記切断工程において形成された前記シート片の平均長さは、前記凹部形成工程において形成する複数の前記凹部のうち、隣接する前記凹部どうしの最短距離よりも長い、前記<11>に記載の吸収体の製造方法。
<13>
前記切断工程で形成された各前記シート片の平均長さは、0.3mm以上30mm以下であることが好ましく、1mm以上15mm以下であることがより好ましく、2mm以上10mm以下であることが特に好ましい、前記<11>又は<12>に記載の吸収体の製造方法。
<14>
前記切断工程で形成された各前記シート片の平均幅は、0.1mm以上10mm以下であることが好ましく、0.3mm以上6mm以下であることがより好ましく、0.5mm以上5mm以下であることが特に好ましい、前記<11>~<13>の何れか1に記載の吸収体の製造方法。
<15>
肌当接面を形成する液透過性の表面シート、非肌当接面を形成する裏面シート及びこれら両シート間に介在された吸収体を具備する吸収性物品の製造方法であって、合成繊維を含む複数のシート片と、親水性繊維とを、搬送部を用いて集積部までに搬送する搬送工程と、前記搬送工程で搬送された複数の前記シート片及び前記親水性繊維を、前記集積部に集積し、前記吸収体の構成部材である集積体を得る集積工程と、前記集積体の上面側に前記表面シートを重ね合せる表面シート重合工程と、前記集積体の下面側に前記裏面シートを重ね合せる裏面シート重合工程と、前記集積体の一部を加圧して該集積体に凹部を形成する凹部形成工程とを備え、前記搬送工程では、前記搬送部内に発生させた空気流中で前記シート片と前記親水性繊維とを接触させて、該シート片と該親水性繊維とを、両者が混合された飛散状態で該空気流によって搬送する、吸収性物品の製造方法。
<16>
前記凹部形成工程では、前記集積体に重ね合せた前記表面シートの上から前記集積体を加圧して該集積体に凹部を形成する、前記<15>に記載の吸収性物品の製造方法。
<17>
前記集積工程で得られた前記集積体を被覆シートで被覆する被覆工程を備え、前記表面シート重合工程及び前記裏面シート重合工程においては、前記集積体を前記被覆シートで被覆してなる前記吸収体に、前記表面シート及び前記裏面シートを重ね合せる、前記<15>又は<16>に記載の吸収性物品の製造方法。
<18>
前記搬送工程では、前記搬送部における空気流の流れ方向に沿う異なる位置で、前記シート片と前記親水性繊維とをそれぞれ供給して搬送する、前記<15>~<17>の何れか1に記載の吸収性物品の製造方法。
<19>
前記搬送工程では、前記親水性繊維を、前記シート片を供給する位置よりも前記流れ方向の上流側で供給して搬送する、前記<18>に記載の吸収性物品の製造方法。
<20>
前記搬送工程では、前記シート片と前記親水性繊維とが前記搬送部内で合流する際に、該シート片の搬送速度と該親水性繊維の搬送速度とが異なっている、<18>又は<19>に記載の吸収性物品の製造方法。
<21>
前記搬送工程では、前記搬送部の内部に吸収性粒子が更に供給され、空気流中で、前記シート片と該吸収性粒子とを接触させて、該シート片と該吸収性粒子と前記親水性繊維とを、三者が混合された飛散状態で該空気流によって搬送する、前記<15>~<20>の何れか1に記載の吸収性物品の製造方法。
<22>
前記搬送工程では、前記流れ方向に沿う異なる位置で、前記シート片と前記吸収性粒子とをそれぞれ供給して搬送する、前記<21>に記載の吸収性物品の製造方法。
<23>
前記搬送工程では、前記吸収性粒子を供給する位置は、前記シート片を供給する位置よりも前記流れ方向の上流側である、前記<22>に記載の吸収性物品の製造方法。
<24>
前記搬送工程では、前記シート片と前記吸収性粒子とが前記搬送部内で合流する際に、該シート片の搬送速度と該吸収性粒子の搬送速度とが異なっている、前記<21>~<23>の何れか1に記載の吸収性物品の製造方法。
<25>
前記凹部形成工程において、前記集積体を加熱しながら加圧して、前記凹部を形成する、前記<15>~<24>の何れか1に記載の吸収性物品の製造方法。
<26>
前記合成繊維を含む帯状の合成繊維シートを、第1方向と該第1方向に交差する第2方向とに所定の長さで切断して前記シート片を形成する切断工程を備える、前記<15>~<24>の何れか1に記載の吸収性物品の製造方法。
<27>
前記凹部形成工程において、前記集積体に複数の凹部を形成し、前記切断工程において形成された前記シート片の平均長さは、前記凹部形成工程において形成する複数の前記凹部のうち、隣接する前記凹部どうしの最短距離よりも長い、前記<26>に記載の吸収性物品の製造方法。
<28>
前記切断工程で形成された各前記シート片の平均長さは、0.3mm以上30mm以下であることが好ましく、1mm以上15mm以下であることがより好ましく、2mm以上10mm以下であることが特に好ましい、前記<26>又は<27>に記載の吸収性物品の製造方法。
<29>
前記切断工程で形成された各前記シート片の平均幅は、0.1mm以上10mm以下であることが好ましく、0.3mm以上6mm以下であることがより好ましく、0.5mm以上5mm以下であることが特に好ましい、前記<26>~<28>の何れか1に記載の吸収性物品の製造方法。
Claims (29)
- 合成繊維及び親水性繊維を含む吸収性物品用の吸収体の製造方法であって、
前記合成繊維を含む複数のシート片と、前記親水性繊維とを、搬送部を用いて集積部まで搬送する搬送工程と、
前記搬送工程で搬送された複数の前記シート片及び前記親水性繊維を、前記集積部に集積し、吸収体の構成部材である集積体を得る集積工程と、
前記集積工程で得られた前記集積体の一部を加圧して該集積体に凹部を形成する凹部形成工程とを備え、
前記搬送工程では、前記搬送部内に発生させた空気流中で前記シート片と前記親水性繊維とを接触させて、該シート片と該親水性繊維とを、両者が混合された飛散状態で該空気流によって搬送する、吸収体の製造方法。 - 前記集積工程で得られた前記集積体を被覆シートで被覆する被覆工程を備え、
前記凹部形成工程では、前記被覆シートの上から前記集積体を加圧して該集積体に凹部を形成する、請求項1に記載の吸収体の製造方法。 - 前記搬送工程では、前記搬送部における空気流の流れ方向に沿う異なる位置で、前記シート片と前記親水性繊維とをそれぞれ供給して搬送する、請求項1又は2に記載の吸収体の製造方法。
- 前記搬送工程では、前記親水性繊維を、前記シート片を供給する位置よりも前記流れ方向の上流側で供給して搬送する、請求項3に記載の吸収体の製造方法。
- 前記搬送工程では、前記シート片と前記親水性繊維とが前記搬送部内で合流する際に、該シート片の搬送速度と該親水性繊維の搬送速度とが異なっている、請求項3又は4に記載の吸収体の製造方法。
- 前記搬送工程では、前記搬送部の内部に吸収性粒子が更に供給され、空気流中で、前記シート片と該吸収性粒子とを接触させて、該シート片と該吸収性粒子と前記親水性繊維とを、三者が混合された飛散状態で該空気流によって搬送する、請求項1~5の何れか1項に記載の吸収体の製造方法。
- 前記搬送工程では、前記流れ方向に沿う異なる位置で、前記シート片と前記吸収性粒子とをそれぞれ供給して搬送する、請求項6に記載の吸収体の製造方法。
- 前記搬送工程では、前記吸収性粒子を供給する位置は、前記シート片を供給する位置よりも前記流れ方向の上流側である、請求項7に記載の吸収体の製造方法。
- 前記搬送工程では、前記シート片と前記吸収性粒子とが前記搬送部内で合流する際に、該シート片の搬送速度と該吸収性粒子の搬送速度とが異なっている、請求項7又は8に記載の吸収体の製造方法。
- 前記凹部形成工程において、前記集積体を加熱しながら加圧して、前記凹部を形成する、請求項1~9の何れか1項に記載の吸収体の製造方法。
- 前記合成繊維を含む帯状の合成繊維シートを、第1方向と該第1方向に交差する第2方向とに所定の長さで切断して前記シート片を形成する切断工程を備える、請求項1~10の何れか1項に記載の吸収体の製造方法。
- 前記凹部形成工程において、前記集積体に複数の凹部を形成し、
前記切断工程において形成された前記シート片の平均長さは、前記凹部形成工程において形成する複数の前記凹部のうち、隣接する前記凹部どうしの最短距離よりも長い、請求項11に記載の吸収体の製造方法。 - 前記切断工程で形成された各前記シート片の平均長さは、0.3mm以上30mm以下である、請求項11又は12に記載の吸収体の製造方法。
- 前記切断工程で形成された各前記シート片の平均幅は、0.1mm以上10mm以下である、請求項11~13の何れか1項に記載の吸収体の製造方法。
- 肌当接面を形成する液透過性の表面シート、非肌当接面を形成する裏面シート及びこれら両シート間に介在された吸収体を具備する吸収性物品の製造方法であって、
合成繊維を含む複数のシート片と、親水性繊維とを、搬送部を用いて集積部までに搬送する搬送工程と、
前記搬送工程で搬送された複数の前記シート片及び前記親水性繊維を、前記集積部に集積し、前記吸収体の構成部材である集積体を得る集積工程と、
前記集積体の上面側に前記表面シートを重ね合せる表面シート重合工程と、
前記集積体の下面側に前記裏面シートを重ね合せる裏面シート重合工程と、
前記集積体の一部を加圧して該集積体に凹部を形成する凹部形成工程とを備え、
前記搬送工程では、前記搬送部内に発生させた空気流中で前記シート片と前記親水性繊維とを接触させて、該シート片と該親水性繊維とを、両者が混合された飛散状態で該空気流によって搬送する、吸収性物品の製造方法。 - 前記凹部形成工程では、前記集積体に重ね合せた前記表面シートの上から前記集積体を加圧して該集積体に凹部を形成する、請求項15に記載の吸収性物品の製造方法。
- 前記集積工程で得られた前記集積体を被覆シートで被覆する被覆工程を備え、
前記表面シート重合工程及び前記裏面シート重合工程においては、前記集積体を前記被覆シートで被覆してなる前記吸収体に、前記表面シート及び前記裏面シートを重ね合せる、請求項15又は16に記載の吸収性物品の製造方法。 - 前記搬送工程では、前記搬送部における空気流の流れ方向に沿う異なる位置で、前記シート片と前記親水性繊維とをそれぞれ供給して搬送する、請求項15~17の何れか1項に記載の吸収性物品の製造方法。
- 前記搬送工程では、前記親水性繊維を、前記シート片を供給する位置よりも前記流れ方向の上流側で供給して搬送する、請求項18に記載の吸収性物品の製造方法。
- 前記搬送工程では、前記シート片と前記親水性繊維とが前記搬送部内で合流する際に、該シート片の搬送速度と該親水性繊維の搬送速度とが異なっている、請求項18又は19に記載の吸収性物品の製造方法。
- 前記搬送工程では、前記搬送部の内部に吸収性粒子が更に供給され、空気流中で、前記シート片と該吸収性粒子とを接触させて、該シート片と該吸収性粒子と前記親水性繊維とを、三者が混合された飛散状態で該空気流によって搬送する、請求項15~20の何れか1項に記載の吸収性物品の製造方法。
- 前記搬送工程では、前記流れ方向に沿う異なる位置で、前記シート片と前記吸収性粒子とをそれぞれ供給して搬送する、請求項21に記載の吸収性物品の製造方法。
- 前記搬送工程では、前記吸収性粒子を供給する位置は、前記シート片を供給する位置よりも前記流れ方向の上流側である、請求項22に記載の吸収性物品の製造方法。
- 前記搬送工程では、前記シート片と前記吸収性粒子とが前記搬送部内で合流する際に、該シート片の搬送速度と該吸収性粒子の搬送速度とが異なっている、請求項21~23の何れか1項に記載の吸収性物品の製造方法。
- 前記凹部形成工程において、前記集積体を加熱しながら加圧して、前記凹部を形成する、請求項15~24の何れか1項に記載の吸収性物品の製造方法。
- 前記合成繊維を含む帯状の合成繊維シートを、第1方向と該第1方向に交差する第2方向とに所定の長さで切断して前記シート片を形成する切断工程を備える、請求項15~25の何れか1項に記載の吸収性物品の製造方法。
- 前記凹部形成工程において、前記集積体に複数の凹部を形成し、
前記切断工程において形成された前記シート片の平均長さは、前記凹部形成工程において形成する複数の前記凹部のうち、隣接する前記凹部どうしの最短距離よりも長い、請求項26に記載の吸収性物品の製造方法。 - 前記切断工程で形成された各前記シート片の平均長さは、0.3mm以上30mm以下である、請求項26又は27に記載の吸収性物品の製造方法。
- 前記切断工程で形成された各前記シート片の平均幅は、0.1mm以上10mm以下である、請求項26~28の何れか1項に記載の吸収性物品の製造方法。
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