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WO2013005782A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2013005782A1
WO2013005782A1 PCT/JP2012/067127 JP2012067127W WO2013005782A1 WO 2013005782 A1 WO2013005782 A1 WO 2013005782A1 JP 2012067127 W JP2012067127 W JP 2012067127W WO 2013005782 A1 WO2013005782 A1 WO 2013005782A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
back surface
absorbent article
liquid
top sheet
Prior art date
Application number
PCT/JP2012/067127
Other languages
English (en)
Japanese (ja)
Inventor
優子 福田
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
Priority claimed from JP2011151210A external-priority patent/JP5806867B2/ja
Priority claimed from JP2011258874A external-priority patent/JP5820706B2/ja
Priority claimed from JP2012025123A external-priority patent/JP5882770B2/ja
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to RU2014104236A priority Critical patent/RU2606570C2/ru
Priority to CN201280032331.2A priority patent/CN103619294B/zh
Priority to KR1020137031448A priority patent/KR102003079B1/ko
Publication of WO2013005782A1 publication Critical patent/WO2013005782A1/fr

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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
    • A61F13/51—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 outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • 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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • 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
    • A61F13/51—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 outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • 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
    • A61F13/51—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 outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/5116—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers
    • 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
    • A61F13/51—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 outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • 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

Definitions

  • the present invention relates to absorbent articles such as disposable diapers and urine pads, sanitary napkins, and light incontinence pads.
  • absorbent articles such as disposable diapers
  • the material and structure of each member have been improved to improve its function and feeling of wear.
  • surface sheets and absorbent bodies as members have also been developed with the aim of such improvements, and recently, various types having improved functionality in accordance with the use situation and the type of article have been proposed.
  • the device which makes the apparent member thickness increase by keeping the distance of the skin contact part of a diaper and an absorber is made
  • Patent Document 1 discloses an absorbent article in which the absorbent body itself is in close contact with the surface sheet to form an uneven shape. Thereby, the internal transferability of the liquid is enhanced, and a soft touch can be realized.
  • Patent Document 2 discloses a sanitary napkin that has a large number of recesses extending from the skin contact surface side to the inside in the excretion facing region of the sanitary napkin. In this napkin, the surface area on the skin contact surface side of the absorber is increased, and the liquid is captured by the concave portion and drawn into the inside. Therefore, the diffusion of the liquid on the skin surface side is suppressed, and the spot absorbability is excellent. This is due to the shape of the absorber itself.
  • Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique in which a waistline gather made of a composite stretchable part is formed on the stomach side and the back side of a diaper in order to improve fit, breathability and softness around the waist of the diaper.
  • this composite stretchable part the plurality of elastic members interposed between the two layers of the waistline part are not fixed except at the end in the width direction, and the stretchability is not hindered. Due to the contraction of the elastic member, the two-layer sheets protrude in opposite directions on both sides to form a plurality of longitudinal ridges. Thereby, air permeability and softness are realized.
  • Patent Document 4 discloses a diaper in which a pair of waist flap portions projecting outward in the width direction are disposed in a back side region serving as a waistline, and a waistline extension region is provided inward of the waist flap portion. Yes. As a result, the stretched region is stretched so as to compensate for the difference in the circumferential length between the waistline and the periphery of the buttock, thereby improving the fit.
  • Patent Document 5 discloses a surface sheet having an uneven structure composed of two layers.
  • the topsheet has a central region in which a large number of convex portions and concave portions are formed and side regions on both sides of the central region.
  • the concave portion of the upper layer sheet in the central region is heated and pressurized by the lower layer sheet and a heat roll, so that the two layers are firmly fixed.
  • the said surface sheet has the high convexity with the high liquid return prevention property in which the convex part with a height is stably maintained in the center area
  • a high leak-proof property can be obtained by the side region excellent in the liquid transfer to the absorber.
  • Patent Document 6 discloses a two-layer surface sheet having a concavo-convex shape formed by a pin roll.
  • the liquid introduction recess provided on the skin contact surface side of the surface sheet reduces the liquid flow on the skin contact surface side, and is excellent in air permeability and cushioning properties.
  • the absorbent article of the present invention is characterized in that a top sheet having a back surface recess is combined so as to interact with another member.
  • the present invention is an absorbent article having a liquid-permeable surface sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between the both sheets.
  • the surface sheet is made of a nonwoven fabric, and the absorbent body has an absorbent core and a covering sheet that covers the absorbent core, and the surface sheet is recessed toward the skin contact surface side on the non-skin contact surface side.
  • an absorbent article in which a plurality of back surface recesses are arranged adjacently.
  • the covering sheet enters the recess on the back surface, and a space exists between the entering covering sheet and the absorbent core.
  • a convex integrally deformed portion formed by the top sheet and the back sheet is disposed outside the end portion in the longitudinal direction of the absorbent body without interposing the absorbent body.
  • a sublayer is disposed between the topsheet and the absorber, and the cybe layer and the back surface convex portion of the top sheet adjacent to the back surface concave portion are in contact with each other, and the fiber density of the sublayer is different at that portion. It is higher than the part.
  • FIG. 1 is a partially cutaway perspective view schematically showing a disposable diaper as a preferred embodiment of an absorbent article in the present invention from the skin contact surface direction.
  • (A) is a cross-sectional view taken along the line II-II shown in FIG. 1
  • (b) is a partially enlarged cross-sectional view schematically showing a partially enlarged cross-section of the surface sheet
  • (c) is a surface. It is a partially expanded sectional view which shows typically the arrangement
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional view showing a part of a predetermined section in FIG.
  • FIG. 2 is a partially enlarged sectional
  • FIG. 16 is a partially enlarged cross-sectional view schematically showing a partially enlarged cross section of the end laminated portion in FIG. 15. It is explanatory drawing which showed typically the top part of the interface of the integrated deformation part in FIG. 15, a turning point, and a turning direction.
  • FIGS. 15 and 17 show a modified example of the end laminated portion of the second embodiment.
  • FIG. 18 is a view corresponding to FIGS. 15 and 17 and showing another modification of the end laminated portion of the second embodiment.
  • FIG. 18 is a view corresponding to FIGS. 15 and 17 and showing another modification of the end laminated portion of the second embodiment.
  • It is a top view which shows typically the other preferable example of the planar arrangement
  • FIG. 6 is an explanatory view schematically showing a cross-sectional shape of an end laminated portion of each specimen in Example 21 and Comparative Examples 21 to 23.
  • FIG. 6 is a drawing-substituting photograph showing states after dropping and tilting of test specimens of Example 21 and Comparative Examples 21 to 23.
  • FIG. 26 is a partially enlarged cross-sectional view showing an enlarged part of a predetermined cross section of FIG. 26-1.
  • the present invention further enhances the absorption performance of the conventional absorbent article, and even when there is repeated excretion fluid or a large amount of excretion fluid, while the diffusion of the liquid in the surface sheet is suppressed, the liquid is quickly drawn in and the inside of the absorber
  • this invention relates to provision of the absorbent article which improved the leak-proof property in the part which an absorber does not interpose.
  • the present invention is caused by liquid return and humidity control inside the article, as well as depending on the use state and excretion amount.
  • the present invention relates to the provision of an absorbent article that can further reduce the residual liquid remaining on the skin surface, which can possibly reduce the burden on the wearer's skin.
  • the thing of 1st Embodiment is especially an absorber upper back surface from the arrangement position.
  • the concave portion 7v and the absorber upper back surface convex portion 8v may be referred to, and the second embodiment may be referred to as the end back surface concave portion 7w and the end back surface convex portion 8w.
  • the back surface recessed part 7 and the back surface convex part 8 of 3rd Embodiment are also called the absorber upper back surface recessed part 7v and the absorber upper back surface convex part 8v from the arrangement position similarly to 1st Embodiment. Moreover, it may just be called the back surface recessed part 7 and the back surface convex part 8, without distinguishing.
  • the first embodiment and the third embodiment are distinguished from each other with respect to the space portion 72 in the present invention, the first embodiment is particularly referred to as an absorbent body space portion 72v because of its member configuration.
  • the thing of the form is also called the recessed part space part 72w or the sublayer upper space part 72w. Further, it may be simply referred to as the space portion 72.
  • FIG. 1 is a partially cutaway perspective view schematically showing a disposable diaper as a preferred embodiment (first embodiment) of an absorbent article according to the present invention from the skin contact surface direction.
  • the diaper shown in the figure is a tape-type disposable diaper, and is shown in a state where the diaper developed in a plane is slightly bent and viewed from the inside (skin contact surface side).
  • the disposable diaper 10 of 1st Embodiment was interposed between the liquid-permeable surface sheet 1 arrange
  • the absorbent body 3 has an absorbent core 31 and covering sheets 32 and 33.
  • the skin contact side surface and the non-skin contact side surface of the absorbent core 31 have a flat shape.
  • the skin contact surface side is covered with a coating sheet 32, the non-skin contact surface side is covered with a coating sheet 33, and both the coating sheet and the absorbent core 31 are spray-coated with a hot melt adhesive.
  • the edge part of the width direction of both coating sheets is mutually joined by the both-sides edge outer side of an absorptive core.
  • the back sheet 2 is in an unfolded state and has a substantially hourglass shape in which both side edges are confined inward in the center in the longitudinal direction (Y direction), forming an outer shape of the diaper.
  • the outer shape of the diaper 10 is, as its developed state, an abdominal side F disposed on the abdomen side of the wearer in the longitudinal direction (Y direction), a back side R disposed on the back side, and a crotch C positioned therebetween. It is divided into and.
  • the crotch C includes an area corresponding to the excretion part of the wearer (excretion part corresponding area).
  • the back sheet 2 may be composed of a single sheet or a plurality of sheets.
  • the top sheet 1 and the absorber 3 are arranged so that the top sheet 1 covers the upper side of the absorber 3.
  • Each of the top sheet 1 and the absorber 3 has a substantially rectangular shape that is narrower than the back sheet 2, and is arranged such that the longitudinal direction thereof coincides with the longitudinal direction of the back sheet 2.
  • a pair of side sheets 4 and 4 are laminated
  • a leak-proof cuff 41 provided with an elastic member is formed at the end of the side seat 4 near the center in the width direction, and leg gathers 42 provided with an elastic member are formed outward in the width direction.
  • a back side flap 4 and a back side flap 2 are laminated to form a back side flap part 17 and a ventral side flap part 18 that project outward in the width direction.
  • a fastening tape 19 is provided on the back flap portion 17.
  • the diaper can be mounted and fixed by sticking this tape 19 to a tape applying part (not shown) provided on the ventral flap part 18.
  • the center of the diaper in the longitudinal direction is gently bent inward, and the absorbent body 3 is worn so as to run along the baby's buttocks and lower abdomen. As a result, excreta is absorbed and held in the absorber 3 accurately.
  • the top sheet 1 quickly absorbs excreted body fluid and transmits it to the absorber, and the touch. From the viewpoint of goodness, it is formed using a hydrophilic air-through nonwoven fabric.
  • the back sheet 2 is made of a liquid-impermeable member, and is formed using, for example, a breathable and liquid-impermeable moisture-permeable film.
  • the poor liquid permeability of the present invention means a property that hardly allows liquid to permeate, and includes waterproofness, water repellency, and liquid impermeability.
  • the absorptive core 31 uses what was comprised from the pulp fiber and the superabsorbent polymer, and the coating sheets 32 and 33 are formed using the raw material with high hydrophilicity.
  • the surface in contact with the human body is referred to as the skin side surface or skin contact surface or surface
  • the opposite surface is referred to as the non-skin surface or non-skin contact surface or back surface.
  • the side close to the skin side or the extending direction is called the skin side
  • the side close to the non-skin surface or the extending direction is the non-skin side, non-skin It is called the contact side or the back side.
  • the direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end.
  • the normal direction of the front or back surface of the absorbent article is called the thickness direction, and the amount is called thickness.
  • a direction from the abdominal side to the back side through the crotch is referred to as a longitudinal direction or a longitudinal direction
  • a direction orthogonal to the longitudinal (longitudinal) direction is referred to as a width direction.
  • the vertical direction typically coincides with the front-rear direction of the human body when worn.
  • FIG. 2-1 is a cross-sectional view taken along the line II-II shown in FIG. 1
  • (b) is a partially enlarged cross-sectional view schematically showing a partially enlarged cross-section of the surface sheet
  • (C) is a partial expanded sectional view which shows typically the arrangement relation of a surface sheet and a covering sheet.
  • FIG. 2-2 is a drawing-substituting photograph in which a section of the disposable diaper 10 of the present embodiment is imaged. The entire section is shown in the center photograph, and one of the back surface recesses 7 (absorber upper back surface recess 7v). Is shown in the lower right.
  • the space portion 72 (absorber space portion 72 v) located below the portion (entrance portion 71) where the covering sheet enters is shown as a portion surrounded by a broken-line circle.
  • the absorptive core 31 is a fiber assembly which consists of pulp fiber etc., and the outer surface has fine undulations, such as the fiber of an outer edge fuzzing. Therefore, in FIG. 2A, the outline of the outer shape of the absorbent core 31 is indicated by a two-dot chain line as an approximate range of the fiber assembly (the same applies to FIGS. 3 and 5).
  • the cross-sectional shape of the diaper 10 is such that the topsheet 1 and the covering sheet 32 have an uneven shape with respect to the absorbent core 31.
  • this shape in particular, the structure formed by the back surface concave portion 7 and the member therebelow, it is possible to improve the liquid drawability, the liquid diffusibility inside the absorber, and the liquid immobilization speed, which will be described later.
  • the cross-sectional shapes of the topsheet 1 and the covering sheet 32 will be further described with reference to FIGS. 2-1 (b) and (c). As shown in FIG.
  • the individual back surface recesses 7 are arranged so as to diffuse in each direction in plan view.
  • a plurality of streak depressions are not arranged in parallel.
  • a surface convex portion 78 is formed on the skin contact surface side of the top sheet 1 corresponding to the back surface recess 7, and on the skin contact surface side of the top sheet 1 corresponding to the back surface convex portion 8.
  • a surface recess 88 is formed.
  • the back surface recess 7 (absorber upper back surface recess 7v) of the top sheet 1 is provided with a cover sheet 32 covering the skin contact surface side of the absorber 3.
  • An entry part 71 is formed in which the part rises and enters.
  • the covering sheet 32 and the absorbent core 31 are intermittently joined with a hot melt adhesive as in the diaper 10 of the present embodiment, the covering sheet 32 is raised between the adhesives and the entry portion 71.
  • a portion 72v) is formed.
  • the space portion 72 is formed along with the formation of the entry portion 71 due to the protrusion of the covering sheet 32.
  • the intrusion depth (h 2 ) of the entry portions 71, 71,... is not necessarily uniform, and is not limited to a deep one as shown in FIG. 1 )>
  • a gap is also formed between the top sheet 1 and the covering sheet 32, which is preferable as a buffer gap portion 73 that reduces the influence of the force from the top sheet 1 side.
  • the back surface concave portion 7 is a recess on the non-skin contact side surface of the topsheet 1 and is formed by a side wall portion 7b that extends from the top portion 7a to the bottom portion 7c formed by the topsheet 1 along the recess (FIG. 2-1). (See (b)).
  • a back surface recess 7 is made of a soft non-woven fabric and cannot necessarily be defined as a perfect geometric figure.
  • the cross-sectional shape of the back surface recess 7 formed by the side wall portion 7b is similar to a parabola, and the space of the back surface recess 7 The shape is similar to a cone or a truncated cone having a round top portion 7a.
  • the three-dimensional shape of the back surface concave portion 7 is not limited to that of the present embodiment, and an arbitrary concave shape can be adopted.
  • a shape such as a cone or a column may be used. If there is an uneven shape on the skin contact surface side of the top sheet as in this embodiment, cones (cones, truncated cones, pyramids, truncated pyramids, slanted cones, etc.) according to the shape on the skin contact surface side ) Is preferable.
  • the top portion 7a is a part of the highest position of the non-skin contact side of the top sheet 1 which forms the inner wall of the three-dimensional space of the back surface recess 7 (Z 1 direction), and the bottom 7c of the space of the site of lowest position (Z 2 direction). Therefore, if the back surface concave portion 7 and the back surface convex portion 8 have an uneven shape that is alternately repeated, the bottom portion 7 c of the back surface concave portion coincides with the top portion 8 a of the back surface convex portion 8.
  • top part 7a and the bottom part 7c (the top part 8a of a back surface convex part) of the above-mentioned back surface recessed part 7 are shown as a vertex on a curved surface, the circumference
  • the top portion 7a can be determined as the highest point in the center point or plane of the plane
  • the bottom portion 7c (the top portion 8a of the convex portion on the back surface) can be determined as the lowest point in the center point or plane of the plane.
  • the depth (h 1 ) of the back surface recess 7 refers to the difference in height of the non-skin contact side surface of the topsheet 1 and is the distance from the top 7a to the bottom 7c (FIG. 2-1 ( b)).
  • the depth (h 2 ) of the entry portion 71 is a distance between the bottom portion 7c and the highest position on the skin contact surface side of the entry portion 71 (FIG. 2-1 (c)). reference).
  • FIG. 3 is an explanatory diagram schematically showing the relationship between the top sheet 1, the covering sheet 32, and the absorbent core 31 in the back surface recess 7 (absorber upper back surface recess 7v).
  • two patterns (a) and (b) are shown.
  • the depth (h 2 ) of the entry portion 71 is shallower (h 2 ⁇ h 1 ) than the recess depth (h 1 ) of the back surface recess 7, and the space portion 72 (absorber space portion 72 v).
  • a buffer gap 73 having a depth (h 3 ) is formed.
  • (h 1 h 2 )
  • the space 72 is formed, but the buffer gap 73 is not formed.
  • the back surface recess 7 (absorber upper back surface recess 7v) is changed from the non-skin contact surface side z 2 of the topsheet 1 to the skin contact surface side z 1.
  • the internal space of the liquid-retaining absorbent 3 under the surface sheet is formed at a position close to the wearer's skin.
  • transmission distance of the liquid to internal space becomes short, and it is effective for the improvement of the liquid absorbency.
  • the presence of the entry portion 71 in the back surface concave portion 7 makes the highly hydrophilic covering sheet close to the skin, so that the rapid withdrawal of the excretory fluid into the absorbent core 31 can be ensured.
  • the side wall portion 7b and the entry portion 71 in the back surface concave portion 7 are in contact with each other and closely bonded to each other at the interface (hereinafter referred to as a bonding portion 74).
  • the approach part 71 can draw in the excretion liquid in the surface sheet 1 directly.
  • the rough interfiber distance of the side wall part 7b (surface sheet 1) made of a liquid-permeable nonwoven fabric is maintained to allow the liquid to permeate quickly, and the entry part 71 (covering sheet 32) made of a highly hydrophilic material. )
  • the entry part 71 covering sheet 32 made of a highly hydrophilic material.
  • Such a structure between the members in the back surface recess 7 is preferably arranged at least in the crotch part C of the diaper 10 from the viewpoint of quickly drawing out the excretory liquid without diffusing.
  • the depth of the entry portion 71 (h 2) is the back surface recess 7 (the absorber on the back surface recess 7v) of the recess depth to (h 1)
  • the back surface recess 7 the absorber on the back surface recess 7v
  • the liquid remaining amount of the top part 7a of the surface sheet 1 can be reduced.
  • the depth (h 2 ) of entry of the entry portion 71 into the back surface recess 7 is not necessarily uniform in each back surface recess 7, or the entry portion 71 is not substantially formed in some cases. 7 may be broken.
  • the entire back surface concave portion in which the depth (h 2 ) of the entry portion 71 is 50% or more it is preferable that there are 50% or more, more preferably 70% or more, of the entire back surface concave portion in which the depth (h 2 ) of the entry portion 71 is 50% or more.
  • the pattern (a) in the above preferred range and satisfying (h 2 ⁇ h 1 ) is preferable because the liquid pull-in property can be improved and the buffer gap portion 73 can provide a unique action. . Specifically, the influence of the force applied from the top sheet 1 side on the absorber 3 can be reduced. In addition, since the top portion 7a of the back surface recess 7 (absorber upper back surface recess 7v) closest to the skin does not come into contact with the entrance portion 71, liquid return can be suppressed even if the entrance portion 71 contains moisture. A good dry feeling of the top sheet 1 can be realized.
  • the ratio (a) / (b) between the (a) pattern and the (b) pattern of the back surface recess 7 formed on the top sheet in the vicinity of the urination portion is 4/6 or more from the viewpoint of emphasizing the drawability of the liquid. 2/8 or more is more preferable.
  • the ratio (a) / (b) is preferably 0/10 or less.
  • the ratio (a) / (b) between the (a) pattern and the (b) pattern of the back surface concave portion 7 formed on the top sheet 1 in the vicinity of the collar portion is 6/4 or more from the viewpoint of emphasizing liquid return suppression.
  • 8/2 or more is more preferable.
  • the ratio (a) / (b) is preferably 10/0 or less.
  • the space portion 72 (absorber space portion 72v) is formed in the back surface recess 7 ((a) and (b) of FIG. 3).
  • the space part 72 can diffuse the excretion liquid drawn in by the entry part 71 inside the absorbent body 3 and directly and efficiently absorb it on the wide surface of the absorbent core. Thereby, the absorption speed
  • the space part 72 since the space part 72 has low water retention power unlike the absorptive core 31 which consists of pulp fiber etc., a liquid can be quickly delivered to the absorptive core 31.
  • FIG. Thus, since the space part 72 can recover the space immediately while holding the temporary liquid as a liquid regulating valve, not only in the case of a large amount of excretion but also in the case of repeated excretion sufficiently Is possible.
  • the skin contact side surface of the absorptive core 31 is a substantially flat shape, the effect
  • the skin contact side surface of the absorbent core 31 does not need to be smooth, and fluffing of pulp fibers (see the inner circle in FIG. 2-1 (a)) reaches the space 72. It is preferable that the liquid is quickly transferred to the absorbent core.
  • the depth of the backside recess 7 (h 1), the depth of the entry portion 71 (h 2), and the depth of the buffer clearance 73 (method of measuring h 3))
  • the depth (h 1 ) of the back surface recess 7 is measured by enlarging the cross section of the top sheet 1 passing through the top 7a and the bottom 7c, and the tangent t (see FIG. 2-1 (c)) of the adjacent bottom 7c and the top 7a. This is done by measuring the distance to the.
  • the depth (h 2 ) of the entry portion 71 is measured by measuring the distance between the top portion 71a of the skin contact surface side convex portion of the entry portion 71 and the tangent line of the bottom portion 7c.
  • the diaper 10 has a structure in which the back surface recess 7 (absorber upper back surface recess 7v) and the entrance portion 71 have high liquid drawing force, and the space portion 72 (absorber body space portion 72v) has an efficient liquid delivery capability. It is. That is, the structure of the back surface recess 7, the entry portion 71 of the covering sheet 32, the space portion 72, and the absorbent core 31 works in cooperation with the absorbent core 31 inside the absorbent body while suppressing liquid diffusion on the skin side surface. By diffusing the liquid, the liquid can be securely held and fixed. Thereby, the liquid residue and liquid return by the surface sheet 1 side are suppressed, and the favorable dry feeling to a wearer's skin is realizable.
  • the reach area of the liquid to the back sheet 2 side also becomes wide, and it becomes possible to discharge moisture from the back sheet 2 to the outside efficiently.
  • the lowering of the diaper temperature due to the heat of vaporization of moisture is realized on a wide surface on the back sheet 2 side, and moisture transpiration inside the diaper 10 (the part surrounded by the back sheet 2 and the wearer's skin) is effective. Therefore, the diaper 10 can be prevented from becoming more stuffy.
  • the ratio (r 1 ) between the distance (r 1 ) between the bottom portion 7c and the bottom portion 7c of the back surface concave portion 7 and the depth (h 1 ) of the back surface concave portion shown in FIG. 1 / h 1 ) is preferably 1/1 or more, and more preferably 10/8 or more.
  • the ratio (r 1 / h 1 ) is preferably 3/1 or less, and more preferably 10/4 or less.
  • the ratio (w 1 / h 1 ) between the pitch (w 1 ) between the top portions 7a-7a of the back surface recess and the depth (h 1 ) of the back surface recess is preferably 1/1 or more, and preferably 10/8 or more.
  • the ratio (w 1 / h 1 ) is preferably 3/1 or less, and more preferably 10/4 or less. By setting it as the said lower limit or more, it can be set as the surface sheet structure where a coating sheet enters easily, and the volume of the space 72 can be ensured large by setting it as the said upper limit or less.
  • the back surface convex portion 8 is formed between the back surface concave portions 7 and 7, and the back surface convex portion 8 preferably has a top portion 8a.
  • the surface sheet 1 and the absorptive core 31 are made the contact in the top part 8a via the coating sheet 32, and this contact area can be suppressed suitably.
  • the skin contact surface side has an uneven shape in which the surface convex portion 78 and the surface concave portion 88 are repeated in accordance with the undulations of the back surface concave portion 7 and the back surface convex portion 8. It is preferable that a plurality of the concave and convex shapes integrated with the front and back are arranged in the plane direction so that the surface sheet 1 as a whole is formed with repeated irregularities in multiple directions (see FIG. 4).
  • the shape of the topsheet 1 can not only reduce the contact area between the absorbent core 31 and the topsheet 1, but also reduce the contact area between the wearer's skin and the topsheet 1.
  • FIG. 5 is a partially enlarged cross-sectional view showing a part of the predetermined cross section of FIG. 2-1 (a) in an enlarged manner.
  • the back convex portion is omitted for the concave and convex row (k 2 row) to avoid complexity for understanding liquid permeation. Only the part is shown.
  • the diffusibility of the excretion liquid on the skin contact surface side of the topsheet 1 can be further suppressed, and the excretion liquid can be moved to a position far from the skin in the thickness direction.
  • the arrow b 2 to b 4 is a mechanism of action for the back surface recess is a basic structural part of the foregoing.
  • the uneven shape of the front surface convex part 78 and the front surface 88 can make the function of the back surface concave part 7 more effective.
  • the individual back surface protrusions 8 are surrounded by a plurality of back surface recesses 7 and are arranged independently from each other in the plane direction, and each back surface recess 7 has a space in the plane direction. It is preferable that they are connected to each other.
  • the above-described independent arrangement is not limited to the case where the rear surface protrusions 8 and 8 are completely separated from each other, and includes those that are partially connected if at least the periphery of the top 8a is separated. . This preferred arrangement will be described with reference to FIG. FIG.
  • FIG. 6 is an explanatory diagram schematically showing the relationship between the back surface concave portion and the back surface convex portion on the non-skin contact surface side of the top sheet in a plan view, and is simplified and modeled based on the arrangement relationship of the top portions 7a and 8a. It shows. Specifically, the top portion 7a of the back surface concave portion 7 is shown as a white circle, and the top portion 8a of the back surface convex portion 8 is shown as a black circle. In FIG. 6, the regions between the top 8a-top 7a-top 8a, between the top 7a-top 7a, and between the top 8a-top 8a are side walls.
  • the side wall portion in the region between the top portion 8a and the top portion 8a is indicated by a long and narrow hourglass-shaped figure and is designated by the symbol m for understanding the preferable arrangement.
  • the said side wall part is a part which forms the back surface recessed part 7 and the back surface convex part 8 continuously, and means both the above-mentioned side wall parts 7b and 8b.
  • a side wall m is disposed between the top 8a-top 8a of the back surface convex portion 8.
  • the side wall portion m is not in a shape that completely connects the top portions 8a of the back surface convex portions 8, but in the central portion thereof as in the shape of an elongated hourglass as shown in FIG. 6 (z 2 in FIG. 2-1 (b)). it is preferable from a shape having a constricted z 1 direction).
  • the back surface convex portions 8 and 8 are incomplete but divided at the constricted portion and become independent, and the back surface concave portion 7 is connected to the space at the constricted portion of the side wall portion m.
  • the side wall part m is preferably formed in an arch shape.
  • the space of each back surface concave portion 7 along the arch shape of the side wall portion m is in a state in which it can freely come and go as indicated by the white arrows in FIGS. 6 and 7. If the topsheet 1 is in this preferred shape, the entrance portion 71 of the covering sheet 32 is formed along this shape, and the space portions 72 below it are connected to each other.
  • the excreted liquid drawn into the space 72 can be freely diffused by separating the support pillars of the back surface concave portion 7 as indicated by white arrows shown in FIGS.
  • the excretory fluid can be efficiently absorbed and retained and immobilized on a wide surface.
  • the diaper 10 it is preferable that there is a density difference or density gradient in which the fiber density of the nonwoven fabric of the top sheet 1 in the back surface concave portion increases from the top portion 7a to the bottom portion 7c.
  • the liquid can be quickly transmitted from the skin contact surface side, and the liquid can be drawn into the inside more strongly.
  • the difference in density, the density gradient for example, in a given cross-section of the back surface recess 7 shown in FIG.
  • the surface sheet 1 over the bottom 7c from the top portion 7a of the rear surface recess 7 height (h 1) three It can be shown by equally dividing (A part, B part, C part) and comparing the average of each fiber density (n 1 , n 2 , n 3 ).
  • the fiber density of the A part, the B part, and the C part is preferably (n 1 ) ⁇ (n 2 ) ⁇ (n 3 ), and the ratio (n 1 / n 2 / n 3 ) is 2/6/10 or more. Is preferable, and 3/5/10 or more is more preferable.
  • the ratio (n 1 / n 2 / n 3 ) is preferably 8/9/10 or less, and more preferably 5/7/10 or less.
  • the density (n 1 , n 2 , n 3 ) of the top portion 7a, the side wall portion 7b, and the bottom portion 7c of the top sheet 1 in the above-described back surface recess 7 can be measured by the following method. Based on the depth (h 1 ) in the back surface recess 7, the top sheet 7 from the top 7 a to the bottom 7 b is divided into three equal parts A, B and C, respectively, and the top 7 a and bottom of the top sheet The cut surface passing through 7b is magnified using the following scanning electron microscope (adjusted to a magnification capable of measuring 30 to 60 fiber cross-sections; 150 times to 500 times) and cut by the cut surface per fixed area.
  • the cross-sectional shape of the back surface recess 7 is not limited to the above-described form (see FIG. 2-1 (b)), and may be any shape as long as it has the above-described liquid absorbability.
  • the top 7a has a spire shape (a)
  • the top 7a has a plurality (b)
  • the top 7a is flat (c)
  • the top 7a is between the side walls 7b and 7b. (D) etc. which are swollen with respect to the width of.
  • the cross-sectional shape of the top sheet 1 is not limited to the concave-convex shape of the present embodiment, and any shape is possible as long as it allows the positional relationship between the back surface concave portion and the covering sheet 32 and the absorbent core 31 thereunder. It can be a shape. For example, as shown in FIG. 9, a shape (a) where the skin contact surface side is flat, a shape (b) where the back surface concave portions 7, 7 are separated and the top portion of the back surface convex portion is flat, and the like can be mentioned. In the case of the shape as shown in FIG.
  • the bottom portion 7 c of the back surface concave portion 7 is an intersecting portion between the plane where the top portion 8 a of the back surface convex portion 8 is located and the aspect of the side wall portion 7 b of the back surface concave portion 7.
  • the shape of the absorbent core is not limited to the shape in which the skin contact side surface of the present embodiment is flat, but the liquid taken into the inside can be diffused widely and quickly absorbed and held and fixed. Can be arbitrarily adopted.
  • An absorbent core 90 FIG. 10 (a)
  • 90a FIG.
  • the liquid retainability is reduced, and the liquid is easily transferred to the protruding absorption portion 93.
  • the low-basis weight recessed portion absorbing portion 94 has a lower density than the high-basis weight protruding absorbing portion 93.
  • the absorbent cores 90 and 90a may have either the surface with the concave portion 91 or the surface of the concave portion absorbent portion 94 with a low basis weight on the skin contact surface side, and may be arbitrarily selected depending on the purpose of the absorbent article. It can be arranged.
  • the concave part 91 or the concave part absorbing part 94 overlaps the space part 72 (absorbent body space part 72) of the back surface concave part 7.
  • the liquid in the space portion 72 is easily transferred to the recess 91 or the recess absorption portion 94, and is easily diffused and fixed.
  • the absorbent article having the back surface recess 7 and the entry part 71 as shown in FIG. 2-2 can be obtained in a normal manufacturing process for this type of article.
  • the topsheet 1 is added between the pressure roll in which the concavo-convex portion is formed and the anvil roll disposed opposite to the pressure roll in the lamination step of the absorber and the topsheet. It can be formed by introducing the laminate and partially pressing and heating it so as to hit the pressure roll. In that case, it is preferable to adhere
  • the adhesive application density (q 1 ) between the surface sheet and the cover sheet is preferably higher than the application density (q 2 ) of the hot melt adhesive between the cover sheet and the absorbent core.
  • the ratio (q 1 / q 2 ) is preferably 2/1 or more, and more preferably 3/1 or more.
  • the ratio (q 1 / q 2 ) is preferably 10/1 or less, and more preferably 5/1 or less.
  • the shaped sheet can be produced as follows.
  • the fiber web before being fused is supplied from the card machine to the web shaping device so as to have a predetermined thickness, and the fiber web is fixed on a pedestal having a large number of protrusions and air permeability.
  • hot air is blown onto the fiber web on the pedestal at a temperature at which each fiber can be appropriately fused to shape the fiber web along the protrusions on the pedestal, and the fibers are fused.
  • the temperature of the hot air at this time is preferably higher than the melting point of the thermoplastic fibers constituting the fiber web, and the temperature difference is preferably 0 ° C. or higher, and preferably 5 ° C. or higher. More preferred.
  • the temperature difference is preferably 70 ° C.
  • thermoplastic fiber examples include polyolefins such as polypropylene and polyethylene, polyesters, polyamides such as nylon 6 and nylon 66, polyacrylonitriles, etc., or a core-sheath type or a side-by-side type composite composed of two or more of these.
  • a fiber etc. can be mentioned.
  • the temperature of the hot air blown onto the fiber web is preferably equal to or higher than the melting point of the low melting point component and lower than the melting point of the high melting point component.
  • the temperature of the hot air blown to the fiber web is preferably the melting point of the low melting point component + 0 ° C. or more, more preferably the melting point of the low melting point component + 5 ° C. or more, and the melting point of the high melting point component ⁇ 10 ° C. or less.
  • the melting point of the high melting point component is more preferably ⁇ 20 ° C. or lower.
  • the fiber web and the nonwoven fabric preferably have a thermoplastic fiber content of 30% by mass or more, and more preferably 40% by mass or more. Moreover, it is preferable that the said thermoplastic fiber content is 100 mass% or less, and it is more preferable that it is 80 mass% or less.
  • the fiber web and the nonwoven fabric may contain fibers that do not inherently have heat-fusibility (for example, natural fibers such as cotton and pulp, rayon, and acetate fibers).
  • the wind speed of the hot air when shaping the fiber web is preferably 20 m / second or more, and more preferably 30 m / second or more, from the viewpoints of formability and texture.
  • the wind speed is preferably 130 m / second or less, and more preferably 100 m / second or less. When the wind speed is equal to or higher than this lower limit, the three-dimensional effect is sufficient, and the effects of cushioning and excrement collection are sufficiently exhibited.
  • the sheet When the wind speed is less than or equal to this upper limit value, the sheet does not open and the compression resistance is maintained well, which is preferable because the effects of cushioning and excrement collection can be sufficiently exhibited.
  • the pedestal is a conveyor type or drum type that can be conveyed, and the typed nonwoven fabric that is conveyed is wound up by a roll.
  • the MD direction and the CD direction may be directed to the nonwoven fabric of this embodiment.
  • the top sheet 1 As a material for forming the top sheet 1, the back sheet 2, the absorbent body 3, and the side sheet 4, those normally used for absorbent articles can be used.
  • the surface sheet 1 for example, a hydrophilic non-woven fabric is preferable, an air-through non-woven fabric, a point-bonded non-woven fabric, a spun-bonded non-woven fabric, a spunlace non-woven fabric, a non-woven fabric called a three-dimensional shaped non-woven fabric, and the fibers are natural fibers such as cotton.
  • Polypropylene single fiber, polypropylene / polyethylene composite fiber, polyethylene terephthalate / polyethylene composite fiber and the like are preferably subjected to hydrophilic treatment, and those having a basis weight of 15 to 50 g / m 2 can be suitably used.
  • a hydrophilic perforated film or a hydrophilic non-woven fabric may be partially overlapped with the crotch portion of the top sheet 1 on the non-skin surface side of the top sheet 1.
  • the back sheet 2 is not particularly limited as long as it is waterproof and moisture permeable, for example, but is, for example, a hydrophobic thermoplastic resin, a fine inorganic filler made of calcium carbonate or the like, or an organic high compatibility material.
  • a hydrophobic thermoplastic resin examples include a porous film obtained by melt-kneading molecules and the like to form a film, and uniaxially or biaxially stretching the film.
  • the thermoplastic resin include polyolefin.
  • the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination.
  • the absorber 3 what is normally used for an absorbent article can be used.
  • a fiber assembly or a combination of this and a superabsorbent polymer can be used.
  • the fibers constituting the fiber assembly hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used.
  • the basis weight is not particularly limited, but is preferably 150 g / m 2 or more 500 g / m 2 or less.
  • a covering sheet for covering the absorbent core for example, thin paper (thin paper) such as hydrophilic tissue paper, crepe paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and synthetic resin fibers are hydrophilized.
  • thin paper such as hydrophilic tissue paper, crepe paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and synthetic resin fibers are hydrophilized.
  • Nonwoven fabrics that have been treated such as air-through nonwoven fabrics, point bond nonwoven fabrics, spunlace nonwoven fabrics, spunbond nonwoven fabrics, spunbond-meltblown-spunbond (SMS) nonwoven fabrics, and the like can be used.
  • a water-repellent nonwoven fabric is preferable, and specifically, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like is used.
  • SM spunbond-meltblown
  • SMS spunbond-meltblown-spunbond
  • the elastic members for three-dimensional gathers and leg gathers of the side sheet 4 ordinary elastic members used for this type of article can be used. Examples of the materials include styrene-butadiene, butadiene, isoprene, neoprene and the like.
  • the absorbent article of the present invention by allowing a space portion to exist between the back surface concave portion, the covering sheet that has entered the covering sheet, and the covering sheet and the absorbent core, liquid diffusion on the surface sheet side is suppressed to the inside of the liquid.
  • the drawing force can be increased, and the drawn liquid can be diffused in the absorbent core to quickly fix the liquid inside. Therefore, the absorbent article of the present invention further enhances the absorption performance of the conventional absorbent article, and even if there is a repeated excretion liquid or a large amount of excretion liquid, the liquid is suppressed while suppressing the diffusion of the liquid on the surface sheet side. It can be promptly drawn and diffused inside the absorbent body to efficiently absorb and hold, thereby exhibiting an excellent effect of suppressing wetness of the skin and providing a good wearing feeling.
  • the absorbent core is not limited to that of the above-described embodiment as long as it has a function of absorbing and retaining liquid therein, and is, for example, a sheet-like thin article. May be.
  • the covering sheet is limited to that of the above-described embodiment as long as it has a function of covering at least the skin contact surface side of the absorbent core and delivering the liquid to the absorbent core.
  • it may be a member having liquid diffusion performance, and may be not only a single layer but also a plurality of layers.
  • the absorbent article of the present invention is not limited to the deployable disposable diaper of the above-described embodiment, and includes, for example, a pants-type disposable diaper and a pants-type disposable including those having a relationship between a topsheet, a covering sheet, and an absorbent core. It may be a diaper that can be used as a tape when partly broken, or a urine pad, sanitary napkin, panty liner, or light incontinence pad. Further, the absorbent article of the present invention is effective not only for menstrual blood but also for urine, olimono, loose stool and the like. Moreover, the absorbent article of the present invention may incorporate other members as appropriate in accordance with the use and function of the present embodiment.
  • the diaper 20 of 2nd Embodiment is the surface of the structure of the diaper 10 of 1st Embodiment provided with the surface sheet which has a back surface recessed part mentioned above in the longitudinal direction outward (end part laminated
  • the second embodiment of the present invention will be described by omitting the same parts as those of the first embodiment.
  • the first embodiment and the second embodiment are not independent and exclusive.
  • the second embodiment may be positioned as included in the subordinate concept of the first embodiment. it can.
  • the invention according to the first embodiment and the invention according to the second embodiment have a technical relationship in which a single inventive concept is formed and linked based on the same or corresponding special technical features.
  • the same reference numerals are given to the same members and the like, and the description may be omitted (however, dimensions and detailed positional relationships are in accordance with the drawings corresponding to the respective embodiments).
  • FIG. 13 is a partially cutaway perspective view schematically showing a disposable diaper as a preferred embodiment (third embodiment) of the absorbent article according to the present invention from the skin contact surface direction.
  • the diaper shown in the figure is a tape-type disposable diaper, and is shown in a state where the diaper developed in a plane is bent slightly and viewed from the inside (skin contact surface side).
  • the disposable diaper 20 of 2nd Embodiment has the structural member (The surface sheet 1, the back sheet 2, the absorber 3, the side sheet 4, etc.) fundamentally the same as the diaper 10 of 1st Embodiment.
  • the absorbent core and the covering sheet constituting the absorbent body 3 are not illustrated, and the entire absorbent body 3 is illustrated as one member.
  • the disposable diaper 20 according to the second embodiment is different from the disposable diaper 10 according to the first embodiment in that the integrally deformed portion 51 is disposed outside the absorbent body 3 in the longitudinal direction.
  • the front sheet 1 and the back sheet 2 have the same length in the longitudinal direction (Y direction) and are longer than the absorber 3.
  • the top sheet 1 and the back sheet 2 are laminated and bonded to each other outside the absorbent body 3 outside the longitudinal end portions 3a and 3a of the absorbent body 3 (this portion is referred to as an end laminated portion 5).
  • a method of bonding a method used for this kind of article can be adopted, and for example, intermittent bonding can be performed by spraying a hot melt adhesive.
  • the end laminated portion 5 is located on the abdominal side F and the back side R of the diaper 20 and is arranged around the wearer's waist when the diaper 20 is worn. When the diaper 20 is worn, the end laminated portion 5 is arranged so that the length from the longitudinal end portion 3a side of the absorbent body 3 to the longitudinal end portions 20a and 20a of the diaper coincides with the height direction of the wearer. Details of the end laminated portion 5 will be described later.
  • an integrally deformed portion 51 that is integrally deformed into a convex shape in the thickness direction in a state where the facing surfaces of the top sheet 1 and the back sheet 2 are bonded together.
  • a plurality As long as the topsheet 1 and the backsheet 2 are deformed in the same thickness direction in each integral deformation portion 51, the deformation sizes of the integral deformation portions 51, 51,. .
  • the integral deformation part 51 consists of the integral skin side deformation part 52 which protruded to the skin contact surface side, and the integral non-skin side deformation part 53 which protruded to the non-skin contact surface side.
  • each integral deformation part 51 with respect to the horizontal surface of the absorbent body 3 on the non-skin side, both the sheets are partially turned to the skin side or the non-skin side.
  • “Integral” in the integrally deformed portion 51 means that the top sheet 1 and the back sheet 2 form a single convex portion as a laminated body, and is not limited to the case where the sheets are in close contact with each other. There may be a gap that is fine enough to inhibit the diffusion of the liquid at the interface between the two.
  • the term “integrated” means that the two sheets undergo substantially the same deformation in the integral deformation portion 51 even when various pressures are applied to the end laminated portion 5, and at the time of de-weighting. Both sheets are in close contact with each other to form a convex portion so that the shape of the integrally deformed portion 51 can be substantially recovered.
  • another member may be interposed between both sheets.
  • the plurality of integrally deformed portions 51 are distributed in the planar direction of the end laminated portion 5 as shown in FIG.
  • the “distributed arrangement” of the integrally deforming parts 51 means that the integrally deforming parts 51 are arranged so as to be separated from each other and diffuse in each direction in a plan view.
  • the two types of integrally deformed portions alternately form a plurality of rows in the longitudinal direction (Y direction) and the width direction (X direction), and the two types of integrally deformed portions in adjacent rows. Are arranged in a staggered pattern shifted by a half pitch.
  • the plurality of integrally deformed portions 51 are widely arranged in the surface direction of the end laminated portion 5.
  • FIG. 15 shows a part of a longitudinal section from the end 3a of the absorbent body 3 toward the end 20a (see FIG. 13) of the diaper 20, and (A) is a cross-sectional view taken along the line AA in FIG.
  • FIG. 15B is a partially enlarged sectional view
  • FIG. 15B is a partially enlarged sectional view taken along line BB of FIG.
  • FIG. 15A as a part of the end laminated portion 5, five integral skin-side deformable portions 52 and four integral non-skin-side deformable portions 53 are alternately arranged in a row A in the longitudinal direction. Things are shown.
  • integral skin side deformable portion 52 is a convex portion which is deflected to the Z 1 side
  • a convex portion is integral non-skin side deformable portion 53 which is deflected to the Z 2 side.
  • the integral skin side deformable portion 52 and the integral non-skin side deformable portion 53 are arranged every other one via the other integral deformable portion.
  • FIG. 15B a section of the row B adjacent to the row A is shown as a part of the end laminated portion 5.
  • four integral skin side deformable portions 52 and three integral non-skin side deformable portions 53 are alternately arranged.
  • the arrangement of the deforming portions in the row B is shifted from the arrangement of the deforming portions in the row A by half a pitch so that the integrally deforming portions that are turned in the same direction do not overlap in the width direction. .
  • the entire end laminated portion 5 in the longitudinal cross section meanders so as to wave in the Z 1 direction and the Z 2 direction of the thickness direction with respect to the horizontal surface on the non-skin side of the absorber 3. It becomes a shape.
  • the space between the facing surfaces of the top sheet 1 and the back sheet 2 constituting the end laminated portion 5 is reduced.
  • the interface whose space has been reduced meanders in the same manner. Therefore, even when liquid leaks from the absorbent body 3 or when moisture in the sweat or diaper of the skin becomes moisture, the broken arrow J shown in FIG. So that the liquid becomes difficult to move.
  • the minimization of the space due to the integration and the meandering structure of the interface act as resistance to the seepage and wetting of the liquid at the interface. Further, the length in the longitudinal direction of the interface becomes longer than the length of the end laminated portion 5 by the meandering, which helps the resistance. Thereby, liquid diffusion and liquid leakage can be effectively suppressed. In addition, by arranging a plurality of rows A and B in an array opposite to each other in the width direction, liquid diffusion can be effectively suppressed in the width direction by the same operation as described above.
  • the absorbent body 3 and the end laminated portion 5 are substantially parallel to the floor surface or the end portion.
  • the stacked portion 5 may be inclined downward.
  • the liquid may enter between the opposing surfaces of the two sheets of the end laminate 5 due to the action of gravity or compression of the absorber 3 by body pressure. If the back sheet 2 is flat as in the prior art, the resistance to liquid migration is low, and the liquid tends to wet and spread due to the surface tension of the hardly permeable back sheet 2 and the capillary force at the interface. If there is more space, the liquid will flow easily.
  • the meandering in the thickness direction at the interface of the end laminated portion 5 exhibits a resistance action against the liquid, as well as the above-mentioned wearer's posture. It draws in the thickness direction (Z 1 ⁇ Z 2 ) due to gravity and functions as a barrier against liquid migration or wetting and spreading (see FIG. 16). This can effectively suppress liquid diffusion and liquid leakage as well as minimizing the space by integration. From this point of view, it is preferable to remove the space by firmly joining the opposing surfaces of both sheets in the integral non-skin-side deformable portion 53, particularly the top portion 53a.
  • the meandering shape means a shape having a plurality of deformed portions in different directions with respect to the horizontal plane even though the end laminated portion 5 as a whole has a fixed horizontal plane. From another point of view, it can be said that the shape has a plurality of turning points in the thickness direction of the end laminated portion 5 with respect to the non-skin side horizontal surface of the absorbent body 3.
  • the turning point is a starting point at which the facing surfaces of the top sheet 1 and the back sheet 2 change direction with respect to the horizontal direction. This point will be described with reference to FIG.
  • FIG. 17 is a schematic view of the top of each integral deformable portion 51 in FIG.
  • the horizontal lines FA and FB are lines obtained by extending the bottom side of the absorber 3 and are also lines positioned at the thickness center of the end laminate 5.
  • the arrows at the left end of the horizontal lines FA and FB indicate the direction from the absorber 3 toward the end 20a of the diaper 20 (see FIG. 13).
  • the turning point 54 is a point where the integrally deformed portion 51 intersects the horizontal planes FA and FB, and is indicated by a black dot.
  • the turning direction G is the direction in which the interface between the two sheets of the end laminate 5 changes direction at the turning point 54 with respect to the arrow directions of the horizontal lines FA and FB, and is indicated by an arrow. Furthermore, each top part (the top part 52a on the skin contact surface side and the top part 53a on the non-skin contact surface side) in the integrated deformation part 51 is indicated by black dots. The top part and the turning point of each integral deformation part 51 are shown on the basis of the boundary between both opposing surfaces from the viewpoint of the resistance action against liquid transfer between both sheets, and the portion where there is a gap between the opposing surfaces is convenient. 2 shows the skin contact surface side of the back sheet 2 as a reference. From the same viewpoint, the direction of the change is indicated by an arrow with reference to the longitudinal direction from the absorber 3 toward the diaper end 20a.
  • FIG. 17A shows the column A in FIG. Row A has ten turning points 54. Diverting direction G at each turning point 54, the deflection direction G2 toward the deflection direction G1 and Z 2 direction toward the Z 1 direction are alternately arranged.
  • FIG. 17B shows the column B in FIG. Column B has eight turning points 54. Deflecting the direction G in turning points 54 of Zorezore is deflection direction G2 toward the deflection direction G1 and Z 2 direction toward the Z 1 direction are alternately arranged. Thereby, it can be said that the interface of both sheets has a shape having a plurality of starting points that alternately swing up and down with respect to the horizontal line, while matching the arrow direction of the horizontal line FA as a whole.
  • the deflection direction at a plurality of turning points by alternating between the Z 1 direction and the Z 2 direction, without the longitudinal section is meander-shaped at the end stacking portion 5, the above-described effects Can be played effectively. That is, if the plurality of turning points 54 having different turning directions are arranged in a row, the number of the integral deformation portions 51 can be arbitrarily set, and the distributed arrangement is a regular arrangement as shown in FIGS. Not limited to this, other regular arrangements may be used, and irregular arrangements may be used. As another regular arrangement, for example, as shown in FIG. 18-1, the horizontal portion 55 may be sandwiched between the adjacent integral deformable portions 51, and as shown in FIG.
  • the combination with the part 52 may be sufficient, and the combination with the horizontal part 55 and the integral non-skin side deformation
  • transformation part 53 may be sufficient like FIG. 18-3.
  • a plurality of turning points are a plurality arranged in succession what deflection direction is the Z 1 direction and the Z 2 direction while sprinkled with horizontal portion 55, a cross-section of an end lamination portion 5 It has a meandering shape with respect to the horizontal line.
  • the dispersed arrangement in the planar direction of the integrally deformed portions 51 is not limited to a regular arrangement, and may be another regular arrangement or an irregular arrangement.
  • a regular arrangement for example, a combination in which a plurality of integrally deformed portions 51 that are turned in the same thickness direction are arranged radially may be arranged in a plurality of plane directions.
  • a plurality of combinations of a central integral non-skin-side deformable portion 53 and six integral skin-side deformable portions 52 surrounding the periphery may be arranged in the planar direction.
  • the integrally deformed portion 51 in which the top sheet 1 and the back sheet 2 are integrated is extended to return to the horizontal (FIG. 20 ( b)), and shrinks to return to the original shape of the integrally deformed portion 51 by weight removal (see FIG. 20A). That is, the integral deformation part 51 becomes the expansion / contraction force of the entire end laminated part 5.
  • the diaper 20 can be realized by satisfying both the high leak-proof property around the waist and the fit property due to the stretching force.
  • the topsheet 1 is a nonwoven fabric (see FIG. 4) used in the first embodiment, and the back surface up to the region of the end laminated portion 5 It is preferable to consist of what the recessed part 7 was arrange
  • the back surface convex portion 8 is provided around the back surface concave portion 7, and the back surface concave portion 7 and the back surface convex portion 8 are alternately adjacent to each other at regular intervals in the plane direction. Are arranged in large numbers.
  • the back surface concave portion and the back surface convex portion in the end laminated portion 5 are referred to as the end back surface concave portion 7w and the end back convex portion 8w from the arrangement position, and the first embodiment.
  • the absorber upper back surface concave portion 7v and the absorber upper back surface convex portion 8w will be described separately. Alternatively, it may be referred to as “a back surface concave portion 7w” in the end laminated portion 5 and “a back surface convex portion 8w in the end laminated portion 5”.
  • a raised portion 21 in which a part of the back sheet 2 made of a liquid hardly permeable film (liquid impervious moisture permeable film) or the like is raised with respect to the end back recess 7 w of the top sheet 1 is formed. (See FIG. 21).
  • the end back concave portion 7w and the raised portion 21 are in close contact with each other and integrated to form an integrated skin side deformable portion 52.
  • the back sheet 2 is deformed along the shape of the top sheet 1 descending from the side wall 7b of the end back recess 7w to the top 8a of the end back convex 8w, and the integral non-skin side A deformed portion 53 is formed.
  • the back sheet 2 is shaped in a concavo-convex shape so as to match the concavo-convex shape on the skin contact surface side of the top sheet 1. Therefore, when the end back surface concave portion 7w and the end back surface convex portion 8w of the topsheet 1 are substantially in the shape of a cone, particularly a cone or a truncated cone, the integral skin side deformable portion 52 and the raised portion 21 of the backsheet 2 and The integrated non-skin-side deformable portion 53 has a shape close to a similar cone shape.
  • Such a shape is preferable because it suppresses the diffusion of the liquid not only in the longitudinal direction (X direction) and the width direction (Y direction) but also in multiple directions and easily develops stretchability in multiple directions.
  • the depth of penetration of the raised portion 21 reaches the top portion 7a of the end portion back surface recess portion 7w so that there is as little space as possible.
  • the depth (h 4 ) of the raised portion 21 is shallower than the depth (h 1 ) of the recess 7w. It is preferable that there are some slight gaps because the contact between the topsheet and the skin can be softened in combination with the softness of the nonwoven fabric used as the topsheet.
  • the shape and dimensions of the topsheet 1 and the backsheet 2 according to the second embodiment are not particularly limited, but may vary somewhat depending on the size and use of the absorbent article to be used in order to effectively exhibit the above-described suitable feeling of use.
  • the depth (h 1 ) of the end back recess 7w is preferably 0.4 mm or more, and more preferably 1 mm or more. Further, the depth (h 1 ) of the end portion back surface recess 7 is preferably 4 mm or less, and more preferably 3 mm or less.
  • the depth of the raised portion 21 of the backsheet 2 (h 4) is preferably 0.2 or more, more preferably 0.5 or more.
  • the depth (h 4 ) of the raised portion 21 is preferably 3.5 mm or less, and more preferably 2 mm or less.
  • the depth (h 4 ) of the raised portion 21 is preferably 30% or more, and more preferably 50% or more with respect to the depth (h 1 ) of the end portion back surface recess 7w. By setting it as the said minimum or more, the liquid remaining amount of the top part 7a of the surface sheet 1 can be reduced.
  • the number of protrusions 21 having a depth (h 4 ) of 50% or more is preferably 50% or more, more preferably 70% or more, and 90%. The above is most preferable.
  • the number of the ridges 21 having a depth (h 4 ) of 100% or more is preferably 5% or more, and more preferably 10% or more.
  • the ratio (w 2 / h 1 ) between the pitch (w 2 ) between the tops 7a-7a of the end back recess 7w and the depth (h 1 ) of the end back recess 7w is 1/1 or more is preferable, and 10/8 or more is more preferable. Further, the ratio (w 2 / h 1 ) is preferably 3/1 or less, and more preferably 10/4 or less.
  • the cross-sectional shapes of the end back surface concave portion 7w and the top sheet 2 are not limited to the above-described form, and can be any shape as long as the above-described effects are exhibited.
  • the form described with reference to FIGS. 8 and 9 in the first embodiment can be employed.
  • the absorbent article in which the integrally deformed part 51 (integrated skin side deformed part 52 and integral non-skin side deformed part 53) as shown in FIG. 14 and FIG. 15 is formed in the end laminated part 5 is an ordinary article in this kind of article. It can be obtained in the manufacturing process. For example, at the stage where the top sheet 1 and the back sheet 2 are stacked via the absorber 3, the stacked portion of the top sheet 1 and the back sheet 2 that does not interpose the absorber is replaced with a pressure roll on which irregularities are formed. It can be formed by introducing, pressing and heating the topsheet 1 between the pressure roll and the anvil roll arranged to face the pressure roll.
  • the hot melt adhesive by slot spray coating, spiral coating or the like so that the top sheet 1 and the back sheet 2 are in close contact with each other to form the integrally deformed portion 51.
  • the integrated skin-side liquid changing part 52 integrated closely.
  • transformation part 53 can be formed favorably and is preferable.
  • the production of the shaped nonwoven sheet can be performed by the method described in the first embodiment.
  • the facing surfaces of the top sheet 1 and the back sheet 2 of the end laminated portion 5 are preferably in close contact with each other, but within a range not impairing the function of the integral deformation portion 51, between both sheets.
  • Other members may be interposed.
  • the interface of both sheets means between the opposing surfaces of both sheets including other intervening members.
  • the other member include an elastic member for reinforcing the stretchability of the waistline portion including the end laminated portion 5 of the diaper 20 (not shown). Stretch reinforcement of the waistline portion is aimed at improving fit to the wearer of the diaper, and is obtained by arranging a plurality of elastic members across the width direction between the top sheet 1 and the back sheet 2.
  • the dorsal flaps 17 and 17 (see FIG. 13) on both sides of the dorsal side R are pulled and fixed to the ventral side. At that time, it is easily stretched by the stretchability of the end laminated portion 5 and the stretchability of the elastic member, and easily conforms to the wearer's body shape, and a good fit can be obtained by appropriate shrinkage at the time of fixation. In addition, it is easy to flexibly follow the change in the wearer's waist circumference even with movement of the body after wearing, and good fit can be maintained. When the elastic member contracts, wrinkles and wrinkles are likely to occur in the sheet 2 on the top sheet 1 and the back surface of the end laminated portion 5.
  • the sheet 2 is in close contact and integrated with the top sheet 1 and the back surface, and a plurality of integrally deformed portions 51 that are turned in the thickness direction are dispersedly arranged in a planar shape. Therefore, it is difficult to become wrinkles or wrinkles in the longitudinal direction.
  • the ridges or folds are likely to be divided and dispersed by the integral deformation portion 51. Thereby, it is preferable that good stretch reinforcement and suppression of liquid diffusion and liquid leakage are effectively achieved.
  • the nonwoven fabric sheet 9 having a size that can be accommodated in the range of the end laminated portion 5 is disposed between the top sheet 1 and the back sheet 2.
  • This nonwoven fabric sheet 9 can give a soft touch by giving thickness to the belly side part F and the back side part R which form the waist part of the diaper 20.
  • the nonwoven fabric sheet 9 is shaped and integrated along the unevenness
  • the top sheet 1, the back sheet 2, the absorber 3 and the side sheet 4 those normally used for absorbent articles can be used. Specifically, the materials exemplified in the first embodiment can be mentioned. Further, the absorbent body 3 is not limited to the above-described one as long as it has a function of absorbing and retaining a liquid therein, and may be, for example, a thin sheet.
  • the absorbent article of the present invention has an excellent effect of improving the leak-proof property in a portion where no absorber is interposed.
  • the absorbent article of the present invention is not limited to the deployable disposable diaper of the above embodiment, and can be widely applied to a structure in which a top sheet and a back sheet are laminated outside the absorber.
  • the top sheet and the back sheet are the liquid permeable sheet on the skin contact surface side and the non-skin contact surface side which are directly or indirectly laminated and integrated at the end of the article where no absorber is interposed.
  • the absorbent article of the present invention may be, for example, a pants-type disposable diaper or a pants-type disposable diaper that can be used as a tape when partly broken, or a urine pad or sanitary napkin , Panty liners, light incontinence pads.
  • the absorbent article of the present invention is effective not only for menstrual blood but also urine, olimono, loose stool and the like.
  • the light incontinence pad includes a liquid-permeable surface sheet that is disposed on the skin surface side when worn, a back sheet that is disposed on the non-skin contact surface side, and an absorbent body that is disposed between both sheets, and has a vertically long shape. (Not shown).
  • the incontinence pad is used by attaching a non-skin contact surface made of a back sheet to a cloth underwear or the like. At that time, the longitudinal direction of the incontinence pad is arranged from the lower abdomen to the buttocks of the wearer.
  • an end laminate is formed in which the top sheet and the back sheet are directly or indirectly laminated and bonded without interposing the absorber.
  • This end laminated portion has a smaller thickness than the region where the absorber is interposed between the two sheets. For this reason, in the case of the conventional incontinence pad, a space is easily formed between the skin and the incontinence pad, and the liquid does not necessarily flow out and leak out.
  • the end laminated portion has an integrally deformed portion in which the top sheet and the back sheet are combined into a laminate and deformed in a convex shape in the sheet thickness direction. Is forming.
  • an integral deformation part becomes the expansion / contraction force of the whole edge part lamination
  • the diaper 30 of 3rd Embodiment uses the surface sheet 1 which has arrange
  • the third embodiment is characterized in that, from the viewpoint of improving the liquid absorption performance, the rear surface concave portion 7 and the back surface convex portion 8 surrounded by the rear surface concave portion 7 and the cibe layer 6 are combined. .
  • the first and second embodiments and the third embodiment are not independent and exclusive, and are, for example, those included in the subordinate concepts of the first and second embodiments. Embodiments can be positioned.
  • the inventions according to the first and second embodiments and the invention according to the third embodiment have a technical relationship in which a single inventive concept is formed and linked based on the same or corresponding special technical features.
  • the same reference numerals are given to the same members and the like, and the description may be omitted (however, the dimensions and detailed positional relationship are in accordance with the drawings corresponding to each embodiment).
  • FIG. 25 is a partially cutaway perspective view schematically showing a disposable diaper as a preferred embodiment (third embodiment) of the absorbent article according to the present invention from the skin contact surface direction.
  • the diaper shown in the figure is a tape-type disposable diaper, and is shown in a state where the diaper developed in a plane is bent slightly and viewed from the inside (skin contact surface side).
  • the disposable diaper 30 of 3rd Embodiment has the same member structure (Top sheet 1, Back sheet 2, Absorber 3, Side sheet 4, etc.) fundamentally as the diaper 10 of 1st Embodiment.
  • FIG. 25 in order to avoid complexity, the absorbent core and the covering sheet constituting the absorbent body 3 are not shown in a section, and the entire absorbent body 3 is shown as one member.
  • the diaper 30 of the third embodiment is different from the diaper 10 of the first embodiment in that a liquid-permeable sublayer 6 is disposed between the topsheet 1 and the absorber 3.
  • the sublayer 6 has a substantially rectangular shape that is narrower than the back sheet 2 and is arranged so that its longitudinal direction coincides with the longitudinal direction of the back sheet 2 and covers the skin contact surface side of the absorbent body 3.
  • the sublayer 6 is a member that improves the absorption performance by quickly drawing in the liquid from the top sheet 6, spreading the liquid in the planar direction, and efficiently delivering the liquid to the absorber 3.
  • the sublayer 6 can increase a member thickness by providing a predetermined distance between the skin contact surface side of the diaper 30 and the absorber 3. Thereby, the liquid return to the surface sheet 1 side is suppressed, and it is effective for suppression of the humidity inside the diaper 30.
  • the sublayer 6 is made of a sheet mainly composed of a liquid-permeable fiber material.
  • the sublayer 6 is preferably one having a fiber density lower than that of the top sheet from the viewpoint of liquid permeability and diffusibility.
  • FIG. 26A is a cross-sectional view taken along the line II-II shown in FIG. 25, and FIG. 26B is a partially enlarged cross-sectional view schematically showing the arrangement relationship between the topsheet and the sublayer 6.
  • FIG. 26-2 is a drawing-substituting photograph in which a section of the disposable diaper 30 is imaged. In the drawing-substituting photograph of FIG. 26-2, the portion where the back surface convex portion 8 of the top sheet 1 is in contact with the sublayer 6 is shown as a portion surrounded by a broken-line circle.
  • the cross-sectional shape of the diaper 30 is such that the topsheet 1 has a back surface convex portion 8 (absorber top back surface convex portion 8v) and back surface concave portion with respect to the absorber 3. 7 (absorber upper back surface recess 7v) has an uneven shape that repeats alternately. And in the back surface convex part 8 (absorber upper back surface convex part 8v), the surface sheet 1 and the sublayer 6 are contact
  • the liquid drawability, liquid diffusibility, and liquid return prevention property of the sublayer are maintained by the structure of the contact portion between the topsheet 1 and the sublayer 6 (hereinafter, the contact portion is denoted by reference numeral 63). And the further reduction of the liquid residue mentioned later is implement
  • the configurations of the topsheet 1 and the sublayer 6 will be further described with reference to FIG. 26-1 (b).
  • a back surface protrusion protruding from the skin contact surface side (Z 1 ) to the non-skin contact surface side (Z 2 ) 8 is formed on the non-skin surface side of the top sheet 1.
  • a large number of back surface convex portions 8 are periodically arranged adjacent to each other at substantially equal intervals in the surface direction.
  • This arrangement is an arrangement in which the individual back surface protrusions 8 are diffused in each direction in a plan view. Thereby, the non-skin contact surface side of the topsheet 1 has an uneven shape.
  • a surface concave portion 88 is formed on the skin contact surface side of the top sheet 1 corresponding to the back surface convex portion 8, and on the skin contact surface side of the top sheet 1 corresponding to the back surface recess 7.
  • the surface convex part 78 is formed.
  • the back surface convex part 8 is the part which protruded in the absorber 3 side in the non-skin contact surface side of the surface sheet 1 as mentioned above. And the back surface convex part 8 is in contact with the sublayer 6 at the contact part 63 (see FIG. 27).
  • the contact portion 63 fills the gap between the absorber 3 and the top sheet 1, and the suction force from the absorber 3 is easily transmitted to the top sheet 1 through the sublayer 6.
  • the fiber density of the sublayer 6 in the contact portion 63 is higher than the fiber density of the other sublayers (hereinafter, the portion of the sublayer 6 having a high fiber density is referred to as a dense portion 61, and the sublayer having a low fiber density)
  • the portion 6 is referred to as a rough portion 62).
  • the capillary force of the dense portion 61 of the sublayer 6 is easier to draw the liquid than the rough portion 62 of the sublayer 6, and in combination with the suction force of the absorbent body 3, it tends to remain on the topsheet 1, particularly the back surface convex portion 8.
  • the liquid can be actively drawn in.
  • the sublayer 6 efficiently delivers the liquid to the absorber 3.
  • the liquid residue suppression of the surface sheet 1 is further improved, and the humidity suppression between the skin and the surface sheet 1 is further improved.
  • the back surface convex portion 8 is a rounded top portion 8a, and the contact area with the sublayer 6 at the contact portion 63 is suitably suppressed. Thereby, liquid return can be suppressed and liquid remaining at the contact portion 63 can be reduced. Moreover, by suppressing the contact area, the liquid absorption performance in the back surface recess 7 described later is not hindered, and is effective in suppressing wetting on the top sheet 1. As long as this effect is exhibited, the back surface convex portion 8 of the top sheet 1 is not limited to the top portion 8a of the third embodiment, and may be a planar shape.
  • the constituent fibers of the back surface convex portion 8 that contacts the contact portion 63 and the dense portion 61 of the sublayer 6 are not formed into films, and the gaps between the fibers are maintained. This is different from the conventional fiber film formation by heat sealing or the like, and the liquid transfer is not hindered. And the liquid in the surface sheet 1 can be strongly guided to the absorber 3 by utilizing the capillary force of the dense portion 61 of the sublayer 6. Further, since the film is not formed into a film, the contact portion 63 is not made rigid and the touch is improved. And the bulkiness and cushioning property by the surface sheet 1 and the sublayer 6 are not inhibited, and a good wearing feeling is obtained.
  • the contact portion 63 does not have rigidity due to film formation, even if there is a pressing in the thickness direction from the top sheet 1 side, the force is softened by the contact portion 63 without being transmitted downward. Therefore, liquid return due to pressing is less likely to occur, which is preferable.
  • the contact portion 63 between the back surface convex portion 8 and the sublayer 6 includes a portion joined by a hot melt adhesive or the like and a portion not joined by the adhesive or the like.
  • the part joined with an adhesive agent is made into the minimum necessary, and also about the range, it is preferable to reduce the joining part in the excretion part corresponding
  • connect does not need to be the whole region of the surface sheet 1, but it is preferable to be given to the crotch part C including the excretion part corresponding
  • the excretion part corresponding region is a part that directly receives excretion of urine or feces and the vicinity thereof.
  • the ratio (g 1 / g 2 ) of the number of contact parts (g 1 ) joined by an adhesive or the like and the number of non-joined contact parts (g 2 ) is preferably 1/1 or more. 1 ⁇ 2 or more is more preferable.
  • the ratio (g 1 / g 2 ) is preferably 1/8 or less, and more preferably 1/4 or less.
  • the dense portion 61 of the sublayer 6 has a recessed portion recessed toward the non-skin contact surface side, and the back surface protruding portion 8 enters the recessed portion. It is preferable that they are in contact with each other. In this state, even if the dense portion 61 and the back surface convex portion 8 are not firmly bonded, the contact state is not easily broken and is easily stabilized. Moreover, since the surface where the back surface convex part 8 touches the dense part 61 spreads moderately in the entering part without expanding the area of the dense part 61, the transfer efficiency to the absorber 3 is improved.
  • the thickness of the concave portion 61 is preferably 30% or more and more preferably 50% or more with respect to the thickness of the rough portion 62. Further, the thickness of the concave portion of the dense portion 61 is preferably 90% or less, and more preferably 70% or less with respect to the thickness of the rough portion 62.
  • the back surface concave portion 7 is a recess on the non-skin contact side surface of the topsheet 1 and is formed by a side wall portion 7b from the top portion 7a to the bottom portion 7c formed by the topsheet 1 along the recess (FIG. 26). -1 (b)).
  • a rough portion 62 of the sublayer 6 is disposed at the position of the back surface recess 7.
  • a recess space 72w is formed between the back surface recess 7 and the rough portion 62 of the sublayer 6. The recessed space 72w is substantially a void even if there is something into which the fiber material of the topsheet 1 or the sublayer 6 slightly enters.
  • transmitted from the surface sheet 1 is low.
  • the recessed part 72w is in the position comparatively close to the skin side by being in the back surface recessed part 7, it is easy to take in a liquid quickly from the top part 7a and the side wall part 7b, and permeate
  • such a recessed part space part 72w is preferable also as a buffer part which relieves the influence of the force from the surface sheet 1 side.
  • the coarse portion 62 of the sublayer 6 is not as high in fiber as the dense portion 61, the liquid drawability and liquid diffusibility, which are the original functions of the sublayer 6, can be exhibited.
  • the rough portion 62 can quickly deliver the liquid taken into the concave space portion 72w to the absorber 3 with a wide area.
  • the fiber density of the sublayer 6 is preferably lower than the fiber density in the vicinity of the back surface recess 7 of the topsheet 1.
  • the distance between a wearer's skin and an absorber can be expanded by the structure of the surface sheet 1, the recessed part space part 72w, and the rough part 62 of the sublayer 6, and thickness can be ensured. Thereby, the liquid return to the skin side can be suppressed suitably.
  • the combination of the concave space portion 72 w and the rough portion 62 of the sublayer 6 improves the absorption rate of excretion liquid from the top sheet 1, and the liquid on the skin contact surface side of the top sheet 1. Can be suppressed. Moreover, even when the excretion amount of the excretion liquid becomes large at a time, the recessed space 72w can temporarily hold the liquid from the top sheet 1 and can serve as a liquid absorption adjusting valve. And since the recessed part 72w has low water retention power unlike the absorbent body 3 which consists of pulp fibers etc., combined with the liquid diffusion action of the sublayer 6, the liquid can be quickly delivered to the absorbent body 3. .
  • the combination of the concave space portion 72w and the rough portion 62 of the sublayer 6 can quickly recover the space while holding the temporary liquid as a liquid adjustment valve. Even in the case of excretion, it is possible to respond sufficiently. Moreover, if the skin contact side surface of the absorber 3 is substantially flat, this action is more effective and preferable.
  • the shape of the back surface recess 7 is such that the cross-sectional shape of the back surface recess 7 formed by the side wall portion 7b is a substantially parabolic shape, and the space shape of the back surface recess 7 is a cone such as a cone or a truncated cone with a round top portion 7a.
  • the shape is preferably close to a body (cone, truncated cone, pyramid, truncated pyramid, inclined cone, etc.). The gentle inclination of the cone shape allows more liquid to be quickly drawn into the recess space 72w while allowing the liquid to permeate in the thickness direction without impairing the pressure when the liquid is excreted.
  • the back surface recess 7, the top portion 7a is a part of the highest position of the non-skin contact side of the top sheet 1 which forms the inner wall of the three-dimensional space of the back surface recess 7 (Z 1 direction), the the bottom 7c it is the site of the lowest position of the space (Z 2 direction).
  • the bottom portion 7 c of the back surface concave portion coincides with the top portion 8 a of the back surface convex portion 8.
  • the top part 7a and the bottom part 7c (the top part 8a of the back surface convex part) of the above-mentioned back surface recessed part 7 are shown as a vertex on a curved surface, the periphery may be planar shape.
  • the top portion 7a can be determined as the center point of the plane or the highest point in the plane
  • the bottom portion 7c can be determined as the center point of the plane or the lowest point in the plane.
  • the depth (h 1 ) of the back surface recess 7 is the difference in height of the non-skin contact side surface of the top sheet 1 and is the distance from the top 7a to the bottom 7c (see FIG. 26-1 (b)). ).
  • the depth (h 1 ) of the back surface recess 7 differs depending on the size and application of the absorbent article and is not uniquely determined, but is preferably 0.5 mm or more, and more preferably 1 mm or more. Further, the depth (h 1 ) of the back surface recess 7 is preferably 4 mm or less, and more preferably 3 mm or less.
  • the depth (h 1 ) of the back surface concave portion 7 is obtained by enlarging the cross section of the top sheet 1 passing through the top portion 7a and the bottom portion 7c, and the tangent t 1 (see FIG. 26-1 (b)) of the adjacent bottom portion 7c and the top portion 7a. This is done by measuring the distance. The measurement is performed by enlargement using a Keyence VH-3000 microscope and a two-point measurement method after setting the calibration. An electron microscope may be used.
  • the region of the back surface concave portion 7 (combination of the concave space portion 72w and the rough portion 62) and the region of the back surface convex portion 8 (the contact portion 63 of the back surface convex portion 8 and the dense portion 61) cooperate.
  • the liquid absorption performance is improved and the liquid is quickly delivered to the absorber 3 to suppress the liquid return, and at the same time, the liquid remaining suppression is improved.
  • the contact of the liquid to a wearer's skin is further suppressed and the humidity reduction effect between skin and the skin surface side of the diaper 30 further improves.
  • Such a structure between the members is preferably arranged at least in the crotch part C of the diaper 30.
  • a good dry feeling on the wearer's skin can be realized. Further, the absorber 3 absorbs and holds the liquid diffused by the sublayer 6 and the recessed space 72w on a wide surface, and the area where the liquid reaches the back sheet 2 side is also widened. And it becomes possible to discharge
  • the fiber density (m 61 ) of the dense portion 61 of the sublayer 6 is preferably 15 / mm 2 or more, and 20 / mm 2 or more. Is more preferable.
  • the fiber density (m 61 ) is preferably 120 fibers / mm 2 or less, and more preferably 80 fibers / mm 2 or less.
  • the fiber density (m 62 ) of the rough portion 62 of the sublayer 6 is preferably 10 fibers / mm 2 or more, and more preferably 15 fibers / mm 2 or more.
  • the fiber density (m 62) is preferably 100 / mm 2 or less, more preferably 60 present / mm 2 or less.
  • the ratio (m 61 / m 62 ) is preferably 3/1 or less, and more preferably 2/1 or less.
  • the ratio (n 63 / n 6 ) of the area (n 63 ) of the dense portion 61 in the area (n 6 ) on the skin contact surface side of the sublayer 6 is 1/20 or more. Is preferable, and 1/10 or more is more preferable.
  • the ratio (n 63 / n 6 ) is preferably 2/5 or less, and more preferably 1/5 or less.
  • the area (n 63 ) of the planar view region is a region area when the sublayer 6 is viewed in plan view from the skin contact surface side without considering a hollow wall surface in the thickness direction.
  • the dense portion 61 and the rough portion 62 of the sublayer are usually difficult to discriminate boundaries with a clear density. Therefore, the dense portion 61 can be distinguished from the rough portion 62 as a recessed portion or the dense portion 61 as a portion in contact with the back surface convex portion 8. More specifically, an area in which the cross-section of the sublayer 6 passing through the adjacent dense portions 61 of the sublayer is enlarged, and the curve on the skin side surface of the sublayer 6 is curved and rounded as a concave curve on the non-skin contact surface side. Let's assume the sandwiched part.
  • the cross section of the skin-side surface of the sublayer has an uneven shape in which a curve that is recessed toward the non-skin contact surface and a curve that protrudes toward the skin contact surface are continuously repeated.
  • the direction of bending changes through a region that is substantially a straight line.
  • a dent portion surrounded by a boundary where the straight line starts to bend and round is defined as a dent.
  • the skin contact surface side of the surface sheet 1 is matched with the undulations of the back surface concave portion 7 and the back surface convex portion 8, and the surface convex portion 78 and the surface concave portion 88. It is preferable that the concave-convex shape repeats. It is preferable that a plurality of the concave and convex shapes integrated with the front and back are arranged in the plane direction so that the surface sheet 1 as a whole is formed with repeated irregularities in multiple directions (see FIG. 4).
  • the shape of the topsheet 1 can not only reduce the contact area with the sublayer 6 but also reduce the contact area between the wearer's skin and the topsheet 1.
  • the collection property of excretion fluid and the improvement of the liquid absorption performance become more effective.
  • the diffusibility of the excretion liquid on the skin contact surface side of the topsheet 1 can be further suppressed, and the excretion liquid can be moved to a position far from the skin in the thickness direction.
  • the liquid is diffused from the concave space portion 72w in the planar direction (arrow b 3), is passed to the absorbent core 31 (arrow b 4) are immobilized.
  • the non-skin contact surface side of the top sheet 1 is independent of each other in the plane direction with the individual back surface convex portions 8 surrounded by the plurality of back surface concave portions 7. It is preferable that the individual back surface recesses 7 are connected to each other in the plane direction.
  • the excreted liquid drawn into the recess space 72w can be freely diffused by separating the support of the back recess 7 as shown by the white arrows shown in FIGS.
  • the excretory liquid can be efficiently absorbed and held and immobilized on a wider surface.
  • the density difference or density gradient in which the fiber density of the nonwoven fabric of the top sheet 1 in the back surface concave portion increases from the top 7 a to the bottom 7 c.
  • the density difference and the density gradient are obtained, for example, in the predetermined cross section of the back surface recess 7 shown in FIG. 26-1 (b) by changing the top sheet 1 extending from the top 7a to the bottom 7c to the height (h 1 ) of the back surface recess 7.
  • the fiber density of the A part, the B part, and the C part is preferably (n 1 ) ⁇ (n 2 ) ⁇ (n 3 ), and the ratio (n 1 / n 2 / n 3 ) is 2/6/10 or more. Is preferable, and 3/5/10 or more is more preferable. Further, the ratio (n 1 / n 2 / n 3 ) is preferably 8/9/10 or less, and more preferably 5/7/10 or less.
  • the density (n 1 , n 2 , n 3 ) of the top portion 7a, the side wall portion 7b, and the bottom portion 7c of the top sheet 1 in the above-described back surface recess 7 can be measured by the following method.
  • the top sheet 7 from the top 7 a to the bottom 7 b is divided into three equal parts A, B and C, respectively, and the top 7 a and bottom of the top sheet
  • the cut surface passing through 7b is magnified using the following scanning electron microscope (adjusted to a magnification capable of measuring 30 to 60 fiber cross-sections; 150 times to 500 times) and cut by the cut surface per fixed area.
  • the measurement was performed at three locations, and the fiber density of the sample was averaged.
  • the cross-sectional shape of the topsheet 1 is not limited to the concave-convex shape of the third embodiment, as long as the rear surface convex portion 8 and the rear surface concave portion 7 and the underlying sublayer 6 can be arranged. It can be of any shape. For example, as shown in FIG. 29, a shape (a) where the skin contact surface side is flat, a shape (b) where the top of the back surface convex portion 8 is flat, and the like can be mentioned. In the case of the shape as shown in FIG.
  • the bottom portion 7 c of the back surface concave portion 7 is an intersecting portion between the plane where the top portion 8 a of the back surface convex portion 8 is located and the curved surface of the side wall portion 7 b of the back surface concave portion 7.
  • the back surface convex portion 8 is thicker than the back surface concave portion 7. Therefore, the liquid residue tends to occur inside the back surface convex portion.
  • the rear surface convex portion 8 is in contact with the dense portion 61 of the sublayer 6, the stronger pulling force of the sublayer 6 and the suction force of the absorber 3 combine to effectively remove the liquid residue. Can be resolved.
  • the liquid can be quickly transmitted from the thin portion of the topsheet 1 to the concave space 72w, and the sublayer 6 can powerfully deliver the liquid to the inside of the absorber.
  • the shape of the absorbent core constituting the absorbent body is not limited to the shape of the skin contact side surface of the third embodiment being flat, and the liquid taken into the interior is diffused widely and quickly absorbed and fixed. What can be made into a thing can be arbitrarily employ
  • Absorbent cores 90 FIG. 10 (a)
  • 90a FIG.
  • the recess 91 or the recess absorbing portion 94 overlaps the recess space 72w of the back recess 7 in the crotch C including at least the excretory part corresponding region. Thereby, the liquid in the recess space 72w is easily transferred to the recess 91 or the recess absorbing portion 94, and is easily diffused and fixed.
  • the absorbent article having the back surface concave portion 7, the back surface convex portion 8, and the contact portion 63 as shown in FIG. 26-2 can be obtained in a normal manufacturing process of this type of product.
  • the topsheet 1 is added between the pressure roll in which the concavo-convex portion is formed and the anvil roll disposed opposite to the pressure roll in the lamination step of the absorber and the topsheet. It can be formed by introducing the laminate and partially pressing it so as to hit a pressure roll.
  • the pressurizing condition is preferably 0.2 MPa or more, and more preferably 0.3 MPa or more.
  • the pressurization is preferably 0.8 MPa or less, and more preferably 0.6 MPa or less.
  • the heating temperature is preferably normal temperature or higher, and more preferably 40 ° C. or higher.
  • the heating temperature is preferably 100 ° C. or lower, and more preferably 80 ° C. or lower.
  • seat which has an uneven
  • the contact portion 63 is more reliably formed, and in this case, it is preferable because a portion having a sub-layer 6 in the contact portion 63 is recessed and a high density can be formed.
  • the manufacturing of the shaped sheet can be performed by the method described in the first embodiment.
  • the material for forming the top sheet 1, the sublayer 6, the back sheet 2, the absorber 3 and the side sheet 4 those normally used for absorbent articles can be used. Specifically, the materials exemplified in the first embodiment can be mentioned.
  • the sublayer 6 it is preferable to use a non-woven fabric or a bulky pulp sheet, for example, in consideration of the above-described function of diffusing and transmitting the liquid.
  • the nonwoven fabric include air-through nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric. When these nonwoven fabrics are composed of hydrophobic fibers, it is preferable to make them hydrophilic using a hydrophilizing agent.
  • the basis weight of the sublayer 5 is preferably 20 g / m 2 or more, and more preferably 30 g / m 2 or more. Also, the basis weight is preferably from 100 g / m 2 or less, 80 g / m 2 or less is more preferable.
  • the absorbent article of the present invention further enhances the absorption performance of conventional absorbent articles, and further reduces the liquid residue on the skin side that may occur depending on the use state, excretion amount, etc., as well as liquid return and suppression of humidity inside the article. And the outstanding effect that the burden on a wearer's skin can be reduced further is produced.
  • the absorbent body is not limited to that of the above-described embodiment as long as it has a function of absorbing and retaining the liquid therein, and is, for example, a sheet-like thin article. Also good.
  • the sublayer is not limited to that of the above embodiment as long as it has a function of covering at least the skin contact surface side of the absorber and delivering the liquid to the absorber. It is not limited to a single layer but may be a plurality of layers.
  • the absorptive article of the present invention is not limited to the deployment type disposable diaper of the above-mentioned embodiment, and includes what has the above-mentioned relation of a surface sheet, a sublayer, and an absorber.
  • it may be a pant-type disposable diaper or a pant-type disposable diaper that can be used as a tape-type when it is partially broken. May be.
  • the absorbent article of the present invention is effective not only for menstrual blood but also for urine, olimono, loose stool and the like.
  • the absorbent article of the present invention may incorporate other members as appropriate in accordance with the use and function of the third embodiment.
  • the present invention further discloses the following absorbent article with respect to the above-described embodiment.
  • An absorbent article having a liquid-permeable surface sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between the both sheets.
  • the surface sheet is made of a nonwoven fabric, and the absorbent body has an absorbent core and a covering sheet that covers the absorbent core,
  • On the non-skin contact surface side of the top sheet a plurality of back surface recesses recessed toward the skin contact surface side are arranged adjacent to each other, the cover sheet enters the back surface recess, and the cover sheet enters
  • An absorbent article having a space between the absorbent core and the absorbent core.
  • ⁇ 2> The absorbent article according to ⁇ 1>, wherein the non-skin contact surface side of the top sheet has a concavo-convex shape due to a periodic arrangement of the back surface recesses.
  • ⁇ 3> The absorbent article according to ⁇ 1> or ⁇ 2>, wherein the skin contact surface side of the surface sheet has an uneven shape.
  • ⁇ 4> The absorbent article according to any one of ⁇ 1> to ⁇ 3>, wherein the skin contact surface side of the absorbent core has a flat shape.
  • ⁇ 5> The absorption according to any one of ⁇ 1> to ⁇ 4>, wherein a depth of an entrance portion in which a part of the covering sheet enters the back surface recess is shallower than a depth of the recess of the back surface recess 7. Sex goods. ⁇ 6> The absorptivity according to any one of ⁇ 1> to ⁇ 5>, wherein a depth of penetration of the covering sheet in the back surface recess of the top sheet is 50% or more of a recess depth of the back surface recess. Goods.
  • the depth of penetration of the covering sheet in the back surface recess of the top sheet out of the entire back surface recess is 50% or more of the recess depth of the back surface recess.
  • the concave portion on the back surface includes a portion where the covering sheet and the topsheet are joined.
  • the back surface concave portion is a depression on the non-skin contact side surface of the topsheet, and is formed by a side wall portion from the top portion to the bottom portion formed by the topsheet along the depression.
  • the back surface recess has a shape similar to a parabola in the cross-sectional shape of the back surface recess 7 formed by the side wall, and the space shape of the back surface recess is a shape similar to a cone or a truncated cone having a round top.
  • ⁇ 12> The absorbent article according to ⁇ 10> or ⁇ 11>, in which a joined portion is formed in which the side wall portion and the entry portion in the back surface recess come into contact with each other and are joined.
  • the bonding portion is configured to spot-bond fibers of the covering sheet and the topsheet by spraying an adhesive.
  • ⁇ 14> On the non-skin contact surface side of the top sheet, a plurality of back surface concave portions and a plurality of back surface convex portions are arranged, and each of the back surface convex portions is surrounded by the plurality of back surface concave portions.
  • the back surface concave portion has a top portion, a side wall portion, and a bottom portion made of a top sheet, and there is a density difference or density gradient of the nonwoven fabric fibers of the top sheet that increases from the top portion toward the bottom portion.
  • ⁇ 16> The absorbent core according to any one of the above ⁇ 1> to ⁇ 15>, wherein the absorbent core has a dense structure of fiber density, and there is an overlapping portion between the coarse portion of the absorbent core and the space portion. The absorbent article as described.
  • ⁇ 17> The absorbent article according to any one of ⁇ 1> to ⁇ 16>, wherein the covering sheet and the absorbent core are intermittently joined with a hot melt adhesive.
  • ⁇ 18> The absorbent article according to any one of ⁇ 1> to ⁇ 17>, in which a fiber density increases from a skin surface side to a non-skin surface side in a cross section of the back surface concave portion.
  • the absorbent article has an end laminate in which the top sheet and the back sheet are directly or indirectly laminated and bonded to each other outside the absorber in the longitudinal direction of the absorbent body.
  • the end laminated portion has a plurality of integrally deformed portions in which opposing surfaces of the topsheet and the backsheet are integrally deformed in a convex shape in the thickness direction, and the plurality of deformed portions are planes of the end laminated portion.
  • the absorbent article according to any one of ⁇ 1> to ⁇ 18>, wherein the absorbent article is distributed in a direction.
  • the opposing surfaces of the top sheet and the back sheet in the end layered portion have a meandering shape in the thickness direction due to the deformation formed by the integral deformation portion in a cross-sectional view in the longitudinal direction.
  • the absorbent article as described.
  • ⁇ 21> On the non-skin contact surface side of the top sheet, a plurality of back surface recesses recessed toward the skin contact surface side are disposed adjacent to each other, and the back surface recesses in the end laminated portion are arranged in the back surface recesses.
  • ⁇ 22> The absorbent article according to ⁇ 21>, wherein the back surface concave portion in the end laminated portion is a substantially cone-shaped depression.
  • ⁇ 23> The absorbent article according to any one of ⁇ 19> to ⁇ 22>, wherein the topsheet is made of a nonwoven fabric having irregularities on both sides.
  • ⁇ 24> The absorbent article according to any one of ⁇ 19> to ⁇ 23>, wherein an elastic member is disposed in a width direction between the top sheet and the back sheet in the end laminated portion.
  • ⁇ 25> The absorbent article according to any one of ⁇ 19> to ⁇ 24>, wherein a sheet made of a nonwoven fabric is interposed between the top sheet and the back sheet in the end laminated portion.
  • ⁇ 26> Any one of the items ⁇ 19> to ⁇ 25>, wherein a depth of penetration of a raised portion in which a part of the back sheet enters the back recess is smaller than a depth of the recess of the back recess in the end laminated portion Or an absorbent article according to claim 1.
  • ⁇ 27> The absorbent article according to ⁇ 26>, wherein a depth of penetration of the back surface concave portion in the end laminated portion is 0.4 mm or more and 4 mm or less.
  • a back surface convex portion On the non-skin contact surface side of the top sheet, a back surface convex portion is dotted to form an uneven shape, and a liquid-permeable sublayer is disposed between the top sheet and the absorber, The sublayer and the back surface convex portion of the top sheet are in contact with each other at a contact portion,
  • the peripheral portion of the back surface convex portion on the non-skin contact surface side of the top sheet is a back surface recess recessed from the non-skin contact surface side to the skin contact surface side, and the back surface recess and the sublayer
  • a concave space portion is formed between the sublayer and the fiber density of the sublayer at the position of the concave space portion is lower than the fiber density of the sublayer in contact with the back surface convex portion.
  • a bonded portion and a non-bonded portion are mixed in a contact portion between the back surface convex portion of the top sheet and the sublayer.
  • the sub layer In the contact portion between the back surface convex portion of the top sheet and the sub layer, the sub layer has a concave portion recessed toward the non-skin contact surface, and the back surface convex portion of the top sheet is formed in the concave portion of the sub layer.
  • the ratio of the area area of the contact portion with the back surface convex portion to the sheet area of the sublayer is 1/20 or more and 2/5 or less, according to any one of the above ⁇ 28> to ⁇ 32> Absorbent article.
  • the fiber density of the sublayer at the contact portion with the back surface convex portion of the top sheet is 15 / mm 2 or more and 120 / mm 2 or less, and any one of the above ⁇ 28> to ⁇ 33> The absorbent article as described.
  • the thickness of the dense portion where the fiber density of the contact portion is high is 30% or more and 90% or less with respect to the thickness of the rough portion where the fiber density is lower than this.
  • ⁇ 37> The absorbent article according to any one of ⁇ 28> to ⁇ 36>, wherein there is a density difference or density gradient in which the fiber density of the nonwoven fabric of the topsheet in the backside recess increases from the top to the bottom.
  • the topsheet is made of a hydrophilic nonwoven fabric.
  • ⁇ 39> The absorbent article according to any one of ⁇ 1> to ⁇ 38>, wherein the back sheet is made of a porous film that is waterproof and has moisture permeability and air permeability.
  • the covering sheet is made of a hydrophilic thin paper.
  • ⁇ 43> The absorbent article according to any one of ⁇ 1> to ⁇ 41>, wherein the absorbent article is a pants-type disposable diaper.
  • ⁇ 44> The absorbent article according to any one of ⁇ 1> to ⁇ 41>, wherein the absorbent article is a pants-type disposable diaper that can be used as a tape mold when partly broken.
  • Example 1 A web-forming device is fixed with a core-sheath composite fiber web having a polyethylene terephthalate core and polyethylene sheath, and hot air is blown onto the fiber web on the pedestal so that the fiber web is moved along the protrusions on the pedestal.
  • both the front and back surfaces are uneven (the pitch (w 1 ) between the tops 7a-7a of the back surface recesses is 5 mm and the depth (h 1 ) of the back surface recesses is 2 mm).
  • a shaped sheet having the shape shown in 4 was formed and used as a top sheet.
  • a liquid-impermeable back sheet, an absorbent core (pulp basis weight 200 g / m 2 , superabsorbent polymer basis weight 286 g / m 2 ) are coated with hydrophilic paper in this order, and the top sheet is laminated in this order. Bonded with melt.
  • the back sheet, the absorbent body shape and the configuration were the same as the current commercially available diaper “Merry's Sarasara Air Through M Size” (trade name) manufactured by Kao Corporation.
  • the adhesive application density (q 1 ) between the top sheet and the cover sheet is 15 g / m 2
  • the hot melt adhesive application density (q 2 ) between the cover sheet and the absorbent core is 5 g / m 2 . It was m 2.
  • the laminated sample was sealed at a diaper product pack pressure and stored at room temperature for 1 month to form an entry portion of the covering sheet.
  • the back surface recess depth (h 1 ) was 1.5 mm on average.
  • the entrance portion of the enter depth (h 2) averaged 1.3 mm.
  • the ratio of the back surface concave portion in which (h 2 ) / (h 1 ) is 50% or more was 95%.
  • the ratio of what completely (100%) entered among the back surface concave portions in which (h 2 ) / (h 1 ) is 50% or more was 60%.
  • Example 2 The laminated sample of Example 1 was sealed at a diaper product pack pressure and stored at room temperature for 3 days. (1) The depth (h 1 ) of the back surface recess was an average of 2.0 mm. (2) Moreover, the penetration depth (h 2 ) of the entry portion was an average of 0.8 mm. (3) The ratio of the back surface concave portion in which (h 2 ) / (h 1 ) is 50% or more was 30%. (4) Of the back surface concave portions in which (h 2 ) / (h 1 ) is 50% or more, the ratio of those completely (100%) entering was 5%.
  • Comparative Example 1 A sample of Comparative Example 1 was a hand-made product having the same specifications as a commercially available disposable diaper (trade name “Merry's Sarah Air-Through M size”) manufactured by Kao Corporation.
  • the liquid diffusion in the absorbent core is a diffusion region of red artificial urine obtained when a projection device is placed under the sample and irradiated when irradiated with light.
  • Test 1 First, for each of the samples of Examples 1 and 2 and Comparative Examples 1 and 2, the absorber width direction central portion at 155 mm in the longitudinal direction from the ventral side absorber end of the sample developed in a plane.
  • the composition of artificial urine was 1.94% by weight of urea, 0.795% by weight of sodium chloride, 0.11% by weight of magnesium sulfate, 0.062% by weight of calcium chloride, 0.197% by weight of potassium sulfate, red No. 2 (dye ) 0.010% by weight, water 96.88% by weight and polyoxyethylene lauryl ether (about 0.07%), and the surface tension was adjusted to 53 ⁇ 1 dyne / cm (23 ° C.).
  • the surface sheet was peeled off and photographed, and the diffusion area of the artificial urine was copied onto the OHP sheet.
  • the absorber upper covering sheet after the surface sheet was peeled off was similarly photographed, and the diffusion area of the artificial urine was copied onto the OHP sheet.
  • a diffusion region of artificial urine obtained by placing a sample on a projection table and irradiating and transmitting light from the back sheet side was copied onto an OHP sheet.
  • the image of the OHP sheet was captured with a scanner, and the diffusion area was calculated using image analysis software Image-Pro Plus (manufactured by Nippon Roper).
  • Test 2 About each sample of Example 1 and Comparative Example 1, the pump was formed by using the central part of the absorbent body in the longitudinal direction at a length of 155 mm from the end part of the abdominal side absorbent body of the sample developed in a plane and the back side end part as a liquid injection point. 40 g of artificial urine was injected at a rate of 5 g / sec. After standing for 10 minutes, a photograph was taken from above, and 40 g of artificial urine was injected at a rate of 5 g / sec from the same injection point. After standing still for 10 minutes, the diffusion area was analyzed in the same manner as in Test 1. In Test 2, it is impossible to analyze the diffusion area after injection of 40 g. In Test 2, it was confirmed by a photographic image taken before the second artificial urine injection that the artificial urine diffusion state on the surface sheet by the first artificial urine injection was the same as that of the same sample of Test 1.
  • Tables 1 and 2 The above evaluation results are shown in Tables 1 and 2 below.
  • the diffusion range of the sample liquid used in the liquid diffusion test is shown in FIGS. Table 1 and FIG. 11 show the measurement results of (Test 1), and Tables 2 and 12 show the measurement results of (Test 2).
  • the values of 40 g injection in Table 2 and FIG. 12 are the values of Example 1 and Comparative Example 1 implemented in Test 1 arranged for comparison.
  • the liquid diffusion range of the top sheet is shown as a part with a black circle on the photographed substitute photograph, and the liquid diffusion range of the covering sheet and the absorbent core is shown as a part surrounded by a black line. ing.
  • the change in the liquid diffusion area between the layers in each sample shown in FIGS. 11 and 12 and the difference in area between Examples 1 and 2 and Comparative Examples 1 and 2 correspond to the measurement results in Tables 1 and 2. It is.
  • the disposable diapers of Examples 1 and 2 have suppressed the diffusion of the liquid in the surface sheet as compared with Comparative Example 1, while In the internal structure under the top sheet such as the covering sheet and the absorbent core, the liquid diffusion is sufficiently performed as in the comparative example.
  • the disposable diaper of Example 1 is a liquid diffusion area on the surface sheet in two liquid injections in Test 2 and only one liquid injection in Test 1. Was confined to substantially the same area.
  • the disposable diaper of Example 1 was fully diffused according to the liquid accumulation amount inside the absorber, although the liquid diffusion of the top sheet was suppressed.
  • the liquid diffusion area of the top sheet after the two liquid injections in Test 2 was about twice that of the one liquid injection in Test 1. From the above, the disposable diaper of the example absorbs efficiently by drawing the liquid quickly and suppressing the diffusion of the liquid in the surface sheet, regardless of the amount of liquid such as repeated excretion. It has been found that this has an excellent effect of suppressing wetness of the skin and thereby providing a good wearing feeling.
  • Example 21 A web-forming device is fixed with a core-sheath composite fiber web having a polyethylene terephthalate core and polyethylene sheath, and hot air is blown onto the fiber web on the pedestal so that the fiber web is moved along the protrusions on the pedestal.
  • both the front and back surfaces are uneven (the pitch (w 1 ) between the tops 7a-7a of the end back recess 7w is 5 mm and the depth (h 1 ) of the end back recess 7w).
  • a shaped sheet having the shape shown in FIG. 4 is formed to be a surface sheet.
  • the surface sheet of a diaper “Merry's Sarasara Air Through M Size” (trade name) manufactured by Kao Corporation was changed to the surface sheet obtained in the above process and joined.
  • similar to the edge part which the absorber of the back side of the said diaper and a stomach side part is not arranged was made into the laminated structure of the said surface sheet, a back surface sheet, and an outer layer nonwoven fabric.
  • the part of the diaper on the back side and the abdomen side near the end where the absorber is not disposed is pressed between the pressure roll and the anvil roll to press the integral skin side deformed part and the integral non-skin side.
  • the depth (h 1 ) of the end back concave portion 7w of the topsheet was an average of 1.0 mm.
  • the penetration depth (h 4 ) of the raised portions of the back sheet was an average of 0.8 mm.
  • (H 4) / (h 1 ) is the proportion of the end back side recess 7w which is 50% or more was 90%.
  • the ratio of complete (100%) penetration was 50%.
  • test body 1A Next, about the back side part of the said diaper test body 1A, it cut out by the longitudinal direction 40mm and the width direction 70mm from the diaper edge part side, and this was made into the test body 1B of Example 21. Furthermore, about the back side part of the said diaper test body 1A, separately from the test body 1B, it cut out from the diaper edge part side by 45 mm in the longitudinal direction and 130 mm in the width direction, and it was set as the test body 1C of Example 21.
  • the cross-sectional shapes of the test bodies 1B and 1C are concavo-convex structures as modeled and shown in FIG.
  • test body 11A was cut out from the diaper end side in the longitudinal direction 45 mm and the width direction 130 mm separately from the test body 11B.
  • the cross-sectional shapes of the test bodies 11B and 11C are concavo-convex structures that are modeled and shown in FIG.
  • test body 12B of the comparative example 22 was set as the test body 12B of the comparative example 22.
  • the back side portion of the test body 12A was cut out from the diaper end side in the longitudinal direction 45 mm and the width direction 130 mm separately from the test body 12B, and this was used as the test body 12C of Comparative Example 22.
  • the cross-sectional shapes of the test bodies 12B and 12C are uneven structures as modeled and shown in FIG.
  • the surface sheet of the test specimen has a two-layer structure having an uneven upper layer and a flat lower layer, and is shown as an upper layer 11 and a lower layer 12 in the model diagram of FIG.
  • Test Sample 13A of Comparative Example 23 In the test body 11A of Comparative Example 21, a diaper test body was obtained in which the topsheet was changed to a flat surface without unevenness. This was designated as Test Sample 13A of Comparative Example 23. In this end laminated portion, since the back surface of the top sheet has no recess, the depth of the recess (h 1 ) and the depth of penetration of the raised portion of the back sheet (h 4 ) were 0 mm. Moreover, about the back side part of 13 A of test bodies, it cut out by the longitudinal direction 40mm and the width direction 70mm from the diaper edge part side, and this was set as the test body 13B of the comparative example 23.
  • test body 13A was cut out from the diaper end side in the longitudinal direction 45 mm and the width direction 130 mm separately from the test body 13B, and this was used as the test body 13C of Comparative Example 23.
  • the cross-sectional shapes of the test bodies 13B and 13C are structures that are modeled and shown in FIG.
  • the diffusion distance refers to the moving distance of the liquid from the dropping point to the end (inclined side).
  • the acrylic plate was allowed to stand for 3 minutes while being tilted by 30 ° so that the portion corresponding to the back side end (end 20a of the diaper 20 in FIG. 13) was downward.
  • the diffusion distance at this point was measured again, and the outline of the liquid diffusion was copied on a transparent OHP sheet.
  • the diffusion area was calculated using an image analysis software Image-Pro Plus (manufactured by Nippon Roper) by taking an image of an OHP sheet with a scanner.
  • the difference between the diffusion distance and the diffusion area after dropping and after the inclination was defined as the flow distance and the flow area, respectively.
  • the measurement was performed 6 times, and the average value was shown in Table 3 below as the evaluation result of the liquid flow test.
  • the state of the spread of the liquid after dropping and tilting of each test specimen is shown in the substitute photograph of FIG.
  • FIG. 24 is an image of each test specimen taken from the top sheet side.
  • the range of the liquid spread is an area indicated as a low brightness color such as black or gray with respect to the white surface sheet.
  • the diffusion area and the diffusion distance are diffusion regions of red artificial urine obtained when a projection device is placed under a sample and irradiated with light.
  • the diffusion distance is the length from the dropping center point to the tip where the artificial urine flows to the portion corresponding to the dorsal end portion 20a.
  • the composition of the artificial urine used was 1.94% by mass of urea, 0.795% by mass of sodium chloride, 0.11% by mass of magnesium sulfate, 0.062% by mass of calcium chloride, 0.197% by mass of potassium sulfate, Red No. 2 (Dye) 0.010% by mass, water 96.88% by mass and polyoxyethylene lauryl ether EO addition mole number 41 (about 0.07,%), surface tension 53 ⁇ 1 dyne / cm (23 ° C.) It is adjusted.
  • the extension amount between the first cycle and the fifth cycle corresponding to each stress was measured, and the difference between both cycles was recorded as “the displacement difference between the first cycle and the fifth cycle”.
  • a small “variation difference between going and returning in the first cycle” indicates that there is little distortion at the end laminated portion of the diaper at the time of expansion and contraction, and the recoverability is good. Therefore, it is shown that when the diaper is first stretched and worn around the waist, it does not loosen and a good fit is obtained.
  • a small “difference in displacement amount between the first cycle and the fifth cycle” indicates that the stretch responsiveness is good even with repeated stretch. Therefore, even if a change occurs in the waist circumference due to the movement of the wearer after wearing the diaper, it is shown that a good fit can be obtained.
  • the evaluation results of “variation difference between the first cycle and return” are shown in Table 4 below, and “displacement difference between the first cycle and the fifth cycle” is shown in Table 5.
  • Example 21 and Comparative Example 21 diffused more than those of Comparative Examples 22 and 23 after dropping (in a state where there was no external force left horizontal). It was found that the distance was much shorter and the liquid was difficult to move. In the case of Comparative Example 22, the liquid was greatly diffused immediately after the dropping and reached the end portion to cause leakage. In Comparative Example 23, it was observed that the liquid diffused to the vicinity of the end immediately after dropping and that the liquid reached the end and leaked. In addition, when an external force after tilting was applied, the specimen of Example 21 had a small expansion of liquid diffusion after dripping (the state where there was no external force left horizontal), and the liquid did not reach the end. There was no leakage.
  • Comparative Example 21 in which the diffusion was relatively small after the dropping, and even in the case of only the diffusion to the vicinity of the end of Comparative Example 23, the liquid reached the end and leaked. Further, as apparent from the results of the diffusion area in Table 3, it was found that the test body of Example 21 had a large resistance to flow and was difficult to diffuse easily and had a large liquid holding power. On the other hand, it was found that Comparative Example 21 has a large liquid holding force while being horizontal, but its resistance to flow is small, and diffusion is easily expanded by deformation and inclination when an external force is applied. In Comparative Examples 22 and 23, since the back sheet was flat, the resistance to liquid diffusion was small and diffused widely immediately after dropping.
  • the test body of Example 21 has the “variation difference between the first cycle and return” and “the displacement difference between the first cycle and the fifth cycle”. ”Were both small and inferior to the specimen of Comparative Example 21 using a web-shaped sheet. From this, it was found that the test body of Example 21 did not hinder the stretchability of the web-shaped sheet, the sheet strain due to elongation was small, and the stretch responsivity was good. Therefore, in the diaper having the end laminated portion of the structure of this test body, the waistline portion of the diaper can easily follow from the fitted state at the time of wearing even if the wearer's posture changes or the abdominal circumference changes due to meals, etc. I found it difficult to vacant.
  • Example 31 A web-forming device is fixed with a core-sheath composite fiber web having a core of polyethylene terephthalate and a sheath of polyethylene, and hot air is blown onto the fiber web on the pedestal so that the fiber web is moved along the protrusions on the pedestal.
  • each fiber is fused to form an irregular shape on both the front and back surfaces (pitch (w 1 ) between the tops 8a-8a of the back surface recesses 5mm and depth of the back surface recesses (h 1 ) 2mm).
  • a shaped sheet having the shape shown in 4 was formed and used as a top sheet.
  • a hydrophilic air-through nonwoven fabric having a basis weight of 40 g / m 2 was used as the sublayer.
  • Non-liquid-permeable back sheet, absorbent core (pulp basis weight 200 g / m 2 , superabsorbent polymer basis weight 286 g / m 2 ) laminated with hydrophilic paper, laminated in order of sub-layer, top sheet, respectively Were bonded with hot melt.
  • a hot-melt spiral pattern was used for bonding between the sublayer and the top sheet, and the contact portion between the sublayer and the top surface convex portion of the top sheet was mixed with non-bonded ones.
  • This layered sample is sealed at the same pack pressure as the current commercially available diaper “Mary's Sarasara Air Through M Size” manufactured by Kao Corporation, and stored at room temperature for 1 month to create a sublayer uneven structure and fiber dense structure. Formed.
  • the ratio (m 61 / m 62 ) between the fiber density (m 61 ) of the dense part and the fiber density (m 62 ) of the coarse part of the sublayer was 1.65.
  • Comparative Example 31 The sample of Comparative Example 31 was prepared immediately after the laminated sample of Example 31 was not sealed and stored. The sub-layer of the sample did not have a concavo-convex structure and a fiber density structure like those of Example 31, but remained flat.
  • Comparative Example 32 Of the configuration of the laminated sample of Example 31, a sample of Comparative Example 32 (no sublayer) is formed by directly laminating the absorber and the topsheet without laminating the sublayer between the absorber and the topsheet, and not sealingly storing it. It was.
  • Comparative Example 33 A commercially available disposable diaper (trade name “Merry's Sarah Air Through M Size”) manufactured by Kao Corporation was used as a sample of Comparative Example 33. The sample is a diaper using a two-layer surface sheet formed by heat sealing and having a concave and convex skin surface side and a flat non-skin surface side, and a sub-layer.
  • the injection part provided in the acrylic plate has a cylindrical shape (height 53 mm) having an inner diameter of 36 mm.
  • the acrylic plate has a cylindrical portion of 1/3 in the longitudinal direction and the central axis in the width direction.
  • a through-hole having an inner diameter of 36 mm is formed so that the central axes coincide with each other and communicate between the inside of the cylindrical injection portion and the surface sheet facing surface of the acrylic plate. While maintaining the liquid height of 10 mm from the injection part, 40 g of artificial urine was injected.
  • the time from the start of injection until the artificial urine disappeared from the top sheet was taken as the absorption time.
  • the composition of artificial urine is 1.94% by mass of urea, 0.795% by mass of sodium chloride, 0.11% by mass of magnesium sulfate, 0.062% by mass of calcium chloride, 0.197% by mass of potassium sulfate, red No. 2 (dye ) 0.010% by mass, water 96.88% by mass and polyoxyethylene lauryl ether EO added mole number 41 (about 0.07%), with surface tension adjusted to 53 ⁇ 1 dyne / cm (23 ° C.) It is.
  • the artificial urine was injected four times at 10-minute intervals and allowed to stand for 10 minutes.
  • Example 2 For each sample of Example 31 and Comparative Examples 31 to 33, the center part of the absorbent body in the width direction at a length of 155 mm in the longitudinal direction from the end part of the abdominal side absorbent body of the sample developed in a plane is defined as a liquid injection point. did. A notch was cut in advance in the surface sheet (10 mm ⁇ 20 mm) around the injection point, and 80 g of artificial urine was injected at a rate of 5 g / sec using a pump. After standing for 10 minutes, the surface sheet was gently peeled off and the mass was measured. Artificial urine absorbed in the top sheet was sucked up with a Kim towel or the like, and the top sheet was left to dry overnight, and a value obtained by subtracting the mass after drying from the above mass was defined as the remaining liquid amount.
  • FIG. 30 shows a state after the test of the top sheet of the test body of Example 31
  • FIG. 31 shows a state after the test of the top sheet of the test body of Comparative Example 31.
  • (a) shows the skin contact surface side of the top sheet
  • (b) shows the non-skin contact surface side
  • (c) partially enlarges (b). It is the drawing substitute photograph shown. In any drawing-substituting photograph, the black portion indicates the liquid residue.
  • the sublayer plays a large role in suppressing the liquid return amount, and there is a sublayer particularly in the pressure division injection. As a result, it was found that the liquid return amount was greatly reduced. Moreover, it turned out that absorption time is quicker than the comparative example 32 without a sublayer from the role which becomes bulky by having a sublayer, hold

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'invention concerne un article absorbant qui possède : une feuille de face endroit perméable au liquide disposée côté face de contact avec la peau; une feuille de face envers disposée côté face de non contact avec la peau; et un corps absorbant qui s'interpose entre ces deux feuilles. Ladite feuille de face endroit est constituée de tissu non tissé. Ledit corps absorbant possède un cœur absorbant, et une feuille de revêtement qui revêt ce dernier. Une pluralité de parties creuses de face envers en retrait côté face de contact avec la peau, sont disposées de manière adjacentes et dispersées côté face de non contact avec la peau de ladite feuille de face envers. Ladite feuille de revêtement pénètre dans ces parties creuses de face envers. Des parties espacement sont présentes entre la feuille de revêtement pénétrant ainsi, et ledit cœur absorbant.
PCT/JP2012/067127 2011-07-07 2012-07-04 Article absorbant WO2013005782A1 (fr)

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RU2014104236A RU2606570C2 (ru) 2011-07-07 2012-07-04 Поглощающее изделие
CN201280032331.2A CN103619294B (zh) 2011-07-07 2012-07-04 吸收性物品
KR1020137031448A KR102003079B1 (ko) 2011-07-07 2012-07-04 흡수성 물품

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JP2011-151210 2011-07-07
JP2011151210A JP5806867B2 (ja) 2011-07-07 2011-07-07 吸収性物品
JP2011-258874 2011-11-28
JP2011258874A JP5820706B2 (ja) 2011-11-28 2011-11-28 吸収性物品
JP2012025123A JP5882770B2 (ja) 2012-02-08 2012-02-08 吸収性物品
JP2012-025123 2012-02-08

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EP3162341A4 (fr) * 2014-06-30 2017-06-21 Unicharm Corporation Article absorbant et article vestimentaire pourvu dudit article absorbant
US20170259550A1 (en) * 2016-03-11 2017-09-14 The Procter & Gamble Company Method Of Making Nonwoven Material Having Discrete Three-Dimensional Deformations With Holes In Selected Portions Of The Protrusions
EP3245991A4 (fr) * 2015-05-29 2018-03-07 Unicharm Corporation Non-tissé pour article absorbant
EP3254653A4 (fr) * 2015-05-29 2018-03-07 Unicharm Corporation Article absorbant
WO2018161288A1 (fr) * 2017-03-09 2018-09-13 The Procter & Gamble Company Matériaux tridimensionnels ayant des ouvertures et des vides
EP3437607A4 (fr) * 2016-06-30 2019-05-08 Unicharm Corporation Article absorbant
EP3354245A4 (fr) * 2015-09-25 2019-06-26 Daio Paper Corporation Article absorbant
US20190262196A1 (en) * 2018-02-23 2019-08-29 The Procter & Gamble Company Substrates and Laminates for Absorbent Articles
US20220000680A1 (en) * 2018-11-30 2022-01-06 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US11253406B2 (en) 2016-11-30 2022-02-22 Kao Corporation Absorbent article and method for manufacturing sheet with three-dimensional opening used therefor
US20220133552A1 (en) * 2020-10-30 2022-05-05 The Procter & Gamble Company Nonwoven And Absorbent Articles Having The Same
US11596560B2 (en) 2015-06-08 2023-03-07 Zuiko Corporation Composite sheet
US12350134B2 (en) 2019-11-27 2025-07-08 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof

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JP5869336B2 (ja) * 2011-12-27 2016-02-24 花王株式会社 吸収性物品
JP5634632B1 (ja) * 2014-05-09 2014-12-03 ユニ・チャーム株式会社 吸収性物品
JP5683742B1 (ja) * 2014-06-30 2015-03-11 ユニ・チャーム株式会社 吸収性物品及び該吸収性物品を備える着用物品
JP6089078B1 (ja) * 2015-08-31 2017-03-01 ユニ・チャーム株式会社 吸収性物品
JP6767407B2 (ja) * 2018-02-28 2020-10-14 ユニ・チャーム株式会社 低体重児用おむつ
JP2020049084A (ja) * 2018-09-28 2020-04-02 花王株式会社 吸収性物品

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JP2010035980A (ja) * 2008-08-08 2010-02-18 Oji Nepia Co Ltd 吸収性物品及びその製造方法

Cited By (23)

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EP3162341A4 (fr) * 2014-06-30 2017-06-21 Unicharm Corporation Article absorbant et article vestimentaire pourvu dudit article absorbant
AU2015285607B2 (en) * 2014-06-30 2019-09-19 Unicharm Corporation Absorbent article and wearable article including absorbent article
US10667961B2 (en) 2014-06-30 2020-06-02 Unicharm Corporation Absorbent article and wearable article including absorbent article
EP3245991A4 (fr) * 2015-05-29 2018-03-07 Unicharm Corporation Non-tissé pour article absorbant
EP3254653A4 (fr) * 2015-05-29 2018-03-07 Unicharm Corporation Article absorbant
US11596560B2 (en) 2015-06-08 2023-03-07 Zuiko Corporation Composite sheet
EP3354245A4 (fr) * 2015-09-25 2019-06-26 Daio Paper Corporation Article absorbant
US20170259550A1 (en) * 2016-03-11 2017-09-14 The Procter & Gamble Company Method Of Making Nonwoven Material Having Discrete Three-Dimensional Deformations With Holes In Selected Portions Of The Protrusions
EP3437607A4 (fr) * 2016-06-30 2019-05-08 Unicharm Corporation Article absorbant
US11253406B2 (en) 2016-11-30 2022-02-22 Kao Corporation Absorbent article and method for manufacturing sheet with three-dimensional opening used therefor
US11696856B2 (en) 2017-03-09 2023-07-11 The Procter & Gamble Comoany Three-dimensional materials having apertures and voids
WO2018161288A1 (fr) * 2017-03-09 2018-09-13 The Procter & Gamble Company Matériaux tridimensionnels ayant des ouvertures et des vides
US10792199B2 (en) * 2018-02-23 2020-10-06 The Procter & Gamble Company Substrates and laminates for absorbent articles
US20190262196A1 (en) * 2018-02-23 2019-08-29 The Procter & Gamble Company Substrates and Laminates for Absorbent Articles
US11864984B2 (en) 2018-02-23 2024-01-09 The Procter And Gamble Company Substrates and laminates for absorbent articles
US20220000680A1 (en) * 2018-11-30 2022-01-06 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US12138143B2 (en) * 2018-11-30 2024-11-12 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US12232939B2 (en) 2018-11-30 2025-02-25 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US12268583B2 (en) 2018-11-30 2025-04-08 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US12268584B2 (en) 2018-11-30 2025-04-08 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US12350134B2 (en) 2019-11-27 2025-07-08 Kimberly-Clark Worldwide, Inc. Three-dimensional nonwoven materials and methods of manufacturing thereof
US20220133552A1 (en) * 2020-10-30 2022-05-05 The Procter & Gamble Company Nonwoven And Absorbent Articles Having The Same
US12351958B2 (en) 2020-10-30 2025-07-08 The Procter & Gamble Company Apparatus and process for deforming a web

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KR20140031914A (ko) 2014-03-13
CN103619294A (zh) 2014-03-05
KR102003079B1 (ko) 2019-07-23
CN103619294B (zh) 2015-11-25
RU2014104236A (ru) 2015-08-20
RU2606570C2 (ru) 2017-01-10
TW201304751A (zh) 2013-02-01

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