WO2015068486A1 - パンツ型の使い捨て吸収性物品 - Google Patents

パンツ型の使い捨て吸収性物品 Download PDF

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Publication number
WO2015068486A1
WO2015068486A1 PCT/JP2014/075373 JP2014075373W WO2015068486A1 WO 2015068486 A1 WO2015068486 A1 WO 2015068486A1 JP 2014075373 W JP2014075373 W JP 2014075373W WO 2015068486 A1 WO2015068486 A1 WO 2015068486A1
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WO
WIPO (PCT)
Prior art keywords
waist
region
absorbent core
edge
rear waist
Prior art date
Application number
PCT/JP2014/075373
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
瀧野　俊介
克文 青木
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to BR112016010078-6A priority Critical patent/BR112016010078B1/pt
Priority to KR1020167014009A priority patent/KR20160083018A/ko
Priority to CN201480061225.6A priority patent/CN105705123B/zh
Priority to AU2014345091A priority patent/AU2014345091B2/en
Publication of WO2015068486A1 publication Critical patent/WO2015068486A1/ja
Priority to PH12016500590A priority patent/PH12016500590A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49058—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by the modular concept of constructing the diaper
    • A61F13/4906—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by the modular concept of constructing the diaper the diaper having an outer chassis forming the diaper and an independent absorbent structure attached to the chassis
    • A61F13/49061—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by the modular concept of constructing the diaper the diaper having an outer chassis forming the diaper and an independent absorbent structure attached to the chassis the diaper having one or two waist members forming the diaper waist region and an independent absorbent structure attached to the one or two waist members forming the crotch region
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • 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
    • A61F13/539—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 characterised by the connection of the absorbent layers with each other or with the outer layers

Definitions

  • This invention relates to pants-type disposable absorbent articles such as disposable diapers, disposable toilet training pants, and disposable incontinence pants.
  • a pants-type disposable absorbent article that includes at least an absorbent core positioned in the crotch region and has a waist opening and a pair of leg openings defined by joining both side edges of the front and rear waist regions to each other is known. is there.
  • the absorbent core in the longitudinal direction, extends from the crotch region to the vicinity of the end of the waist opening to the front / rear waist region, and the front / rear waist region is disposed on the skin facing surface.
  • An absorbent article in which an extended portion of the liquid-impervious sheet is folded back to the skin-facing surface of the liquid-permeable top sheet at the end of the waist region, and the extended portion is fixed to the liquid-permeable sheet.
  • the liquid-impervious backsheet extending part of the liquid-impervious sheet is folded back to the skin-facing surface of the liquid-permeable top sheet, and the extended part is liquid-permeable. Since it is fixed to the adhesive sheet, excrement can be prevented from leaking from the vicinity of the end portion in the longitudinal direction of the front and rear waist region.
  • An object of the present invention is to improve a conventional absorbent article, and to provide a pants-type disposable absorbent article that can prevent excrement from leaking from a waist opening.
  • the first invention has a longitudinal direction and a transverse direction orthogonal thereto, a skin facing surface and a non-skin facing surface on the opposite side, a front waist region, a rear waist region, A crotch region located between the front and rear waist regions and an absorbent core located at least in the crotch region, and a waist opening and a pair of leg openings are defined by joining both side edges of the front and rear waist regions to each other
  • the front waist region includes a front opening edge that defines a part of the waist opening, a front opening that can be expanded and contracted in a direction around the waist, and is positioned on the front opening edge side.
  • the rear waist area includes a rear opening edge that defines a part of the waist opening;
  • a front waist region that is stretchable in a tortuous direction and is located on the edge side of the rear opening, and the leakproof sheet that is located on the non-skin facing surface side of the absorbent core, and the front waist region
  • the vertical dimension from the outer edge of the leak-proof sheet to the front opening edge of the leak-proof sheet is the vertical dimension from the outer edge of the leak-proof sheet to the rear opening edge of the rear waist region.
  • a separation dimension in the longitudinal direction from the front edge of the absorbent core to the front opening edge is larger than a separation dimension in the direction, and the separation dimension in the longitudinal direction from the rear edge of the absorbent core to the rear opening edge It is smaller than the separation dimension in the vertical direction.
  • the second invention has a longitudinal direction and a transverse direction perpendicular thereto, a skin facing surface and a non-skin facing surface on the opposite side, a front waist region, a rear waist region, A crotch region located between the front and rear waist regions and an absorbent core located at least in the crotch region, and a waist opening and a pair of leg openings are defined by joining both side edges of the front and rear waist regions to each other
  • the rear waist region forms an opening edge that forms a part of the waist opening, a waist stretchable region that can be stretched in a direction around the waist, and the waist stretchable region.
  • the waist stretchable region is formed at least between the rear edge of the absorbent core and the opening edge, and extends from the rear edge of the absorbent core to the opening edge side.
  • the vertical dimension of the portion to be performed is larger than the vertical dimension of the absorbent core in the rear waist region.
  • the separation distance in the vertical direction from the front opening edge to the front end edge of the absorbent core is from the rear opening edge. Since it is smaller than the vertical separation distance to the rear edge of the absorbent core, the rigidity of the absorbent core can prevent the rear waist holding area from being separated from the skin of the wearer, and the rear waist of the absorbent article The area fits the wearer's back. Moreover, the longitudinal separation distance from the outer edge of the leakproof sheet in the front waist region to the front opening edge is in the vertical direction from the outer edge of the leakproof sheet to the rear opening edge in the rear waist region. Since it is larger than a separation dimension, it can suppress that excrement leaks from the opening edge of a back waist region.
  • the longitudinal dimension of the portion extending from the rear end edge of the absorbent core to the opening end side is the rear waist Since it is larger than the longitudinal dimension of the absorbent core in the area, the rigidity of the absorbent core can prevent the waist stretchable area from separating from the wearer's skin, and the rear waist area of the absorbent article It can be fitted to the back, and excrement can be prevented from leaking from the opening edge of the rear waist region.
  • FIG. 4 is a schematic sectional view taken along line IV-IV in FIG. 2.
  • FIG. 5 is a schematic cross-sectional view taken along line VV in FIG. 2.
  • A The partially broken enlarged view of a back waist area.
  • the following embodiment relates to a pants-type disposable diaper shown in FIGS. 1 to 14 and includes not only an indispensable structure of the invention but also a selective and preferable structure.
  • a diaper 10 has a vertical axis P and a horizontal axis Q, a vertical direction Y and a horizontal direction X, a skin facing surface and a non-skin facing surface located on the opposite side, and a waist.
  • An annular elastic waist panel 12 extending in the rotation direction, a liquid absorbing structure 11 connected to the skin facing surface of the elastic waist panel 12, and an elastic crotch panel 13 attached to the skin facing surface side of the elastic waist panel 12.
  • the diaper 10 has a front waist region 14, a rear waist region 15, and a crotch region 16 positioned between the front and rear waist regions 14 and 15, and is symmetric about the vertical axis P.
  • the elastic waist panel 12 has an elastic belt function for fixing the liquid absorbing structure 11 between the inseam of the wearer, and the front waist panel 18 forming the front waist region 14 and the rear waist region 15 are formed.
  • the front waist panel 18 has a horizontal rectangular shape defined by an inner edge 18a, an outer edge 18b, and both side edges 18c, 18d between the inner and outer edges 18a, 18b.
  • the rear waist panel 19 has a horizontal rectangular shape defined by an inner end edge 19a, an outer end edge 19b, and both side edges 19c, 19d between the inner and outer end edges 19a, 19b.
  • the side edges 18c, 18d of the front waist panel 18 and the side edges 19c, 19d of the rear waist panel 19 that correspond to each other are overlapped with each other and are known in the seam 20 that are intermittently arranged in the longitudinal direction Y.
  • the waist opening 22 and the pair of leg openings 23 are defined by being connected by heat welding means such as embossing / debossing or sonic.
  • the waist opening 22 is formed by a front opening edge 22 a in the front waist panel 18 and a rear opening edge 22 b in the rear waist panel 19.
  • the waist opening 22 has the upper end portion of the front waist panel 18 and the upper end portion of the rear waist panel 19 matched, and the lower end portion of the front waist panel 18 and the lower end portion of the rear waist panel 19 matched.
  • the upper and lower ends of one of the front and rear waist panels 18 and 19 are included in the upper and lower ends of the other front and rear waist panels 18 and 19 in the vertical direction. Absent. However, the fact that the upper and lower end portions of the front and rear waist panels 18, 19 coincide with each other includes a case where the upper and lower end portions are slightly shifted in the vertical direction due to a manufacturing error.
  • the “slight shift” specifically means that in the manufacture of the diaper 10, the upper end portions and the lower end portions of the front and rear waist panels 18, 19 may be displaced within 10 mm in the longitudinal direction Y.
  • the front and rear waist regions 14 and 15 are connected to both side edges by the seam 20, and the inner end edges 18 a and 19 a mean the lower end of the connecting part where the seam 20 is located. , It is not located on the crotch region 16 side from the connecting portion.
  • the front and rear waist panels 18 and 19 respectively have waist inner layers (waist inner layer sheets) 24 and 25 located on the skin facing surface side and waist outer layers (waist outer layer sheets) 26 and 27 located on the non-skin facing surface side. .
  • the waist outer layers 26 and 27 have a larger width dimension in the longitudinal direction Y than the waist inner layers 24 and 25, and extend further outward in the longitudinal direction Y from the outer end edges 24 a and 25 a of the waist inner layers 24 and 25.
  • ⁇ Waist outer layer> For the waist outer layers 26 and 27, an SMS (spunbond / meltblown / spunbond) non-woven fabric, a spunbond non-woven fabric, an air-through non-woven fabric, a plastic sheet, or any one of the non-woven fabrics and plastics having a mass of about 15-30 g / m 2 A laminate sheet with a sheet can be used.
  • the waist inner layers 24, 25 and the waist outer layers 26, 27 are joined together by an appropriate adhesive applied to at least one inner surface, such as a hot melt adhesive or a known heat welding means.
  • an elastic fiber nonwoven fabric can be used.
  • a spunbond fiber nonwoven fabric, a melt blown fiber nonwoven fabric, a heat roll fiber nonwoven fabric, an SMS fiber nonwoven fabric, an airlaid fiber nonwoven fabric, and an air-through fiber nonwoven fabric have known elasticity.
  • the fiber nonwoven fabric can be formed from a single material or a combination thereof.
  • the elastic nonwoven fabric can be formed from, for example, an elastomer resin made of polyethylene, polyurethane, or the like, a thermoplastic resin made of polyethylene, polypropylene, polyester, acrylic, or the like.
  • a non-elastic fiber nonwoven fabric can be used as described later, the waist inner layer 25 of the rear waist region 15 directly touches the wearer's body, so that the flexibility and the touch are improved. Therefore, at least the waist inner layer 25 is preferably an elastic fiber nonwoven fabric.
  • ⁇ Leak-proof sheet> Referring to FIGS. 2 and 3, between the waist inner layers 24 and 25 and the waist outer layers 26 and 27, the center portion in the lateral direction X of the front and rear waist regions 14 and 15, and the waist outer layers 26 and 27 and the reinforcing layer.
  • the front and rear leak-proof sheets 28 and 29 are arranged between the front and rear members 30. 4 and 5, the outer end edges 28b and 29b of the front and rear leak-proof sheets 28 and 29 extend from the front and rear end flaps 54a and 55a of the liquid absorbing structure 11 toward the front and rear opening end edges 22a and 22b. ing.
  • Inner end edges 28a and 29a of the front and rear leak-proof sheets 28 and 29 extend to the crotch region 16 side from the front and rear end edges 58a and 58b of the absorbent core 58. It is preferable to print a graphic (not shown) visible from the outside on the non-skin facing surfaces of the front and rear leak-proof sheets 28 and 29.
  • the front and rear leakage-proof sheets 28 and 29 may be formed of a liquid-impermeable and moisture-permeable sheet made of a plastic material such as a polyethylene film or a polypropylene film. You may form with the fiber nonwoven fabric processed with the liquid agent.
  • the separation dimension L1 in the longitudinal direction Y from the outer end edge 28b of the front leak-proof sheet 28 of the front waist region 14 to the front opening end edge 22a is the rear waist region 15. It is larger than the separation dimension L2 in the vertical direction Y from the outer end edge 29b of the rear leak-proof sheet 29 to the rear opening end edge 22b.
  • the separation dimension L1 is, for example, 10-50 mm
  • the separation dimension L2 is, for example, 1-30 mm.
  • each waist elastic body> 4 and 5 in the front and rear waist panels 18 and 19, the extending portions of the waist outer layers 26 and 27 extending further outward in the longitudinal direction Y from the outer end edges 24 a and 25 a of the waist inner layers 24 and 25 are as follows. Folded toward the skin facing side. In the bent portions 26a and 27a formed by folding, a plurality of front and rear waist elastic bodies 31 and 32 are fixed via an appropriate adhesive, for example, a hot melt adhesive, so as to be contractible under expansion. Moreover, between the waist outer layers 26 and 27 and the liquid absorption structure 11, the elongate reinforcement layer 30 formed from the fiber nonwoven fabric and the front and back leak-proof sheet
  • a plurality of front and rear waist elastic bodies 33 and 34 and front and rear waist elastic bodies 35 and 36 are interposed between the reinforcing layer 30 and the front and rear leak-proof sheets 28 and 29 via an appropriate adhesive, for example, a hot melt adhesive. It is fixed so that it can contract under extension.
  • an appropriate adhesive for example, a hot melt adhesive. It is fixed so that it can contract under extension.
  • the front waist region 14 includes a front waist outer elastic region 37 located on the front opening edge 22a side, a front waist inner elastic region 38 located on the crotch region 16 side, a front waist outer elastic region 37, and a front waist inner elastic region. 38 and a front waist middle elastic region 39.
  • the front waist outer elastic region 37 does not include the absorbent core 58
  • the front waist middle elastic region 39 and the front waist inner elastic region 38 include a part of the absorbent core 58.
  • the front waist region 14 has a front waist stretchable region 49a formed between the front end edge 58a of the absorbent core 58 and the front opening end edge 22a.
  • the front waist outer elastic region 37 includes a plurality of, for example, a thread-like, string-like, or strand-like front waist elastic body 31 that are spaced apart from each other in the longitudinal direction Y by a given dimension and extend in the transverse direction X.
  • the front waist middle elastic region 39 has a plurality of front waist elastic bodies 33 that are spaced apart from each other in the longitudinal direction Y and extend in the transverse direction X, for example, in the form of threads, strings, or strands.
  • the front waist elastic region 38 has a plurality of front waist elastic bodies 35 that are spaced apart from each other in the longitudinal direction Y and extend in the lateral direction X, for example, in the form of threads, strings, or strands.
  • the front waist outer elastic region 37, the front waist inner elastic region 38, and the front waist middle elastic region 39, for example, instead of disposing waist elastic bodies 31, 33, 35 in the form of threads, strings or strands, are elastic sheets. You may give elasticity by arrange
  • the rear waist region 15 includes a rear waist outer elastic region 40 located on the rear opening edge 22b side, a rear waist inner elastic region 41 located on the crotch region 16 side, a rear waist outer elastic region 40, and a rear waist inner elastic region. 41 and a rear waist middle elastic region 42.
  • the rear waist outer elastic region 40 does not include the absorbent core 58
  • the rear waist middle elastic region 42 does not include the absorbent core 58, but is adjacent to the rear end edge 58 b of the absorbent core 58
  • the waist inner elastic region 41 includes a part of the absorbent core 58.
  • the rear waist outer elastic region 40 has a plurality of, for example, thread-like, string-like, or strand-like rear waist elastic bodies 32 that are spaced apart from each other in the longitudinal direction Y by a given dimension and extend in the transverse direction X.
  • rear waist elastic body 34 In the rear waist middle elastic region 42, a plurality of, for example, thread-like, string-like or strand-like rear waist elastic bodies (rear waist elastic bodies) 34 that are spaced apart from each other in the longitudinal direction Y and extend in the transverse direction X.
  • the rear waist elastic body 34 is disposed on the non-skin facing surface side of the liquid absorbing structure 11.
  • the rear waist elastic region 41 has a plurality of, for example, a thread-like, string-like, or strand-like rear waist elastic body 36 that are spaced apart from each other in the longitudinal direction Y and extend in the transverse direction X.
  • elastic sheets are provided instead of disposing, for example, thread-like, string-like, or strand-like waist elastic bodies 32, 34, 36 in the rear waist outer elastic region 40, the rear waist inner elastic region 41, and the rear waist middle elastic region 42. You may give elasticity by arrange
  • the elongation stress in the lateral direction X of the front and rear waist outer elastic regions 37 and 40 is set larger than the elongation stress in the lateral direction X of the front and rear waist middle elastic regions 39 and 42.
  • the front and rear waist elastic bodies 31 and 32 are attached so as to be contractible by extending, for example, a thread-like, string-like or strand-like elastic material having a fineness of 470-940 dtex by about 1.6-3.5 times. Is.
  • the front and rear waist elastic bodies 33 and 34 are elastically attached in a fineness of 310 to 780 dtex, for example, a thread-like, string-like, or strand-like elastic material that is stretched about 1.8 to 2.8 times so as to be shrinkable.
  • a fineness of 310 to 780 dtex for example, a thread-like, string-like, or strand-like elastic material that is stretched about 1.8 to 2.8 times so as to be shrinkable.
  • the elongation stress of 171% at the maximum extension of the front and rear waist outer elastic regions 37 and 40 is about 0.7 to 1.7 N / mm, and the maximum elastic force of the front and rear waist middle elastic regions 39 and 42 is 171.
  • % Elongational stress is about 0.4-1.4 N / mm.
  • the front and rear waist outer elastic regions 37 and 40 have a relatively large elongation stress and stably fit the wearer's body, so that the elongation stress of the leg elastic region 62 is set to be relatively low.
  • the diaper 10 can be prevented from shifting downward.
  • the difference in elongation stress is not limited to the case of using elastic bodies with different fineness and elongation magnification.
  • it can also be achieved by forming an elastic body from different materials and providing a difference in the separation distance between the elastic bodies in each elastic region using elastic bodies formed from the same material.
  • a desired elongation stress in each elastic region can be set by appropriately combining the material to be used, the fineness of the elastic body, the expansion ratio, and the separation distance of the elastic body.
  • the elongation stress in the front and rear waist inner and middle elastic regions 37-40 is measured by the following method using a tensile tester (INSTRON model: 5564) manufactured by Instron Japan Company Limited.
  • a tensile tester INSTRON model: 5564
  • the distance R between the pair of upper and lower chucks (pinch) is set to the same size as the dimension in the transverse direction X in the natural state of the diaper (distance between the side seam portions of the waist region). Measured under conditions of mode and tensile speed of 100 mm / min.
  • a measurement sample having a length dimension of 3-5 cm in the lateral direction X is cut out from the diaper 10 so as not to include the liquid absorbing structure 11, and the lateral gathering is performed until there is no gather caused by the contraction force of each waist elastic body.
  • the dimension between the seams 20 at both side edges in such a state was defined as a dimension R1 (not shown) at the maximum extension. Note that the sample used for the maximum dimension R1 is not used for the measurement of the elongation stress.
  • both side edges of the sample cut from the diaper 10 were fixed to the upper and lower chucks, respectively. In this state, the sample was pulled up and down so that the upper and lower chucks were separated from each other, and the sample was extended to a required length.
  • the dimension R1 at the maximum extension measured in advance is set to 100%. Measurement was started from the distance R between the chucks, and the sample was extended until the distance between the chucks was about 87% of the maximum dimension R1. Next, the sample extended to about 87% of the maximum dimension R1 is gradually contracted to measure the extension stress when the separation distance between the upper and lower chucks is about 71%. Based on the width of the sample, the unit is measured. A value converted into a value per width (about 30 mm) was taken as a measured value (N / 30 mm).
  • the front and rear waist elastic bodies 35 and 36 included in the front and rear waist elastic regions 38 and 41 are obtained by extending a thread-like, string-like or strand-like elastic material having a fineness of about 310 to 620 dtex by about 1.1 to 3.5 times. It is attached so that it can shrink.
  • the elongation stress of 171% at the maximum elongation of the front and rear waist elastic regions 38 and 41 is about 0.2 to 1.2 N / mm.
  • the elongation stress of the front and rear waist elastic regions 38 and 41 is the same as that of the front and rear waist outer elastic regions 37 and 40 and the front and rear waist middle elastic regions 39 and 42 obtained by cutting out a sample of about 30 mm from the front and rear waist panels 18 and 19. And measured.
  • the stretching stress (tensile strength) of the front and rear waist elastic areas 38 and 41 is increased. It can be lower than that of 40.
  • the elongation stress (tensile strength) of the front and rear waist elastic regions 38 and 41 is increased. It can be lower than that of 42.
  • the waist elastic body positioned in the vicinity of the absorbent core is relatively
  • the waist elastic body located on the opening edge side exerts the required contracting force, thereby reducing the lateral dimension of the area on the opening edge side, and the front and rear waists.
  • the panel fits the wearer's body.
  • the front and rear waist outer elastic regions 37 and 40 do not include the absorbent core 58
  • the front and rear waist outer elastic regions 37 and 40 include the front and rear end edges 58a and 58b of the absorbent core 58 and the front opening edge.
  • the front and rear waist elastic bodies 31-34 expand and contract while reducing the influence of the rigidity of the absorbent core 58 on the front and rear waist elastic bodies 31-34. Therefore, the dimensions of the front and rear waist outer elastic regions 37 and 40 in which the front and rear waist elastic bodies 31-34 are disposed are larger than the dimensions of the absorbent core 58 at the front and rear end edges 58a and 58b. Since it becomes small, the front and rear waist outer elastic regions 37 and 40 fit the wearer's body.
  • front and rear waist elastic regions 37 and 40 expand and contract even with respect to the unevenness of the wearer's back, it is possible to suppress the occurrence of a gap between the back and the rear waist panel 19 and It is possible to suppress excrement from leaking from the opening edge 22b.
  • front waist region 14 since the front and rear waist elastic regions 37 and 40 expand and contract even with respect to the unevenness of the wearer's back, it is possible to suppress the occurrence of a gap between the back and the rear waist panel 19 and It is possible to suppress excrement from leaking from the opening edge 22b. The same applies to the front waist region 14.
  • the front and rear waist elastic bodies 31-34 continuously extend in the lateral direction X. Continue in the direction. Therefore, in the front and rear waist outer elastic regions 37 and 40 and the front and rear waist middle elastic regions 39 and 42 of the front and rear waist panels 18 and 19, the diaper 10 can be pressed against the wearer from the entire circumference around the waist. The diaper 10 can be fitted to the body.
  • the front waist elastic body 35 is not located at the center in the lateral direction X of the liquid absorbing structure 11, and the contraction force acts on the liquid absorbing structure 11. Therefore, there is no possibility of causing gathers that cause leakage of body fluids.
  • the rear waist elastic body 36 is not positioned at the center in the lateral direction X of the liquid absorbing structure 11, and the contraction force acts on the liquid absorbing structure 11. Therefore, there is no possibility of causing gathers that cause leakage of body fluids.
  • the elastic waist panel 12 has a predetermined length L9 from the opening edge 22a of the front waist panel 18 to the crotch region 16 side, a waist holding region 51a extending in the longitudinal direction Y, and a lower end edge of the waist holding region 51a. It has a given length dimension L10 toward the crotch region 16 and a waist central region 51b extending in the longitudinal direction Y and adjacent to the waist retaining region 51a (see FIGS. 1, 4 and 5).
  • the waist retaining area 51a is an area that is formed between the front edge 58a of the absorbent core 58 and the front opening edge 22a in the front waist panel 18, and is set by the length dimension L9 in the longitudinal direction Y. Also in the rear waist panel 19, it is an area
  • the length dimension L9 in the longitudinal direction Y of the waist retaining area 51a and the length dimension of the waist central area 51b are, for example, the same.
  • the length dimension L9 is 10-60 mm
  • the length dimension L10 is 10-60 mm.
  • the waist retaining area 51a is formed by a front waist retaining area 49b on the front waist panel 18 side and a rear waist retaining area 50b on the rear waist panel 19 side.
  • the front waist holding area 49b and the front waist stretchable area 49a are the same area.
  • the front waist retaining region 49b does not include the absorbent core 58, but includes the waist inner layer 24, the waist outer layer 26, the reinforcing layer 30, the front leakproof sheet 28, and the body side liner 59 in the liquid absorbing structure 11.
  • the outer cover 60 and the leak-proof sheet 61 are laminated. Therefore, a part of the front waist holding area 49b has a portion formed by laminating seven sheets.
  • the front waist holding region 49b includes, for example, three front waist elastic bodies 31 and one front waist elastic body 33.
  • the rear waist holding region 50b set by the length L9 from the rear opening edge 22b includes, for example, six front waist elastic bodies 32, and the absorbent core 58 of the liquid absorbing structure 11,
  • the body side liner 59, the outer cover 60, the leakproof sheet 61, and the reinforcing layer 30 are not included, and the waist inner layer 25, the waist outer layer 27, and the rear leakproof sheet 29 are laminated.
  • the rear waist holding area 50b has a portion formed by laminating four sheets. Therefore, the rear waist holding area 50b has a portion where the number of sheets constituting the front waist holding area 49b is smaller than the number of sheets constituting the rear waist holding area 50b.
  • the thickness dimension of the rear waist holding area 50b in the rear waist panel 19 can be made smaller than the thickness dimension of the front waist holding area 49b in the front waist panel 18, the rear waist panel 19 is attached to the wearer's body. While it can be strongly pressed, the front waist panel 18 can be pressed in the front waist region 14 so that excessive force is not applied to the wearer's body.
  • the above operations and effects are achieved by the front and rear waist panels 18, 19 so that the mass per unit area of the sheet forming the rear waist holding area 50b is smaller than the mass per unit area of the sheet forming the front waist holding area 49b. It can also be achieved by forming.
  • the waist center area 51b extends in the longitudinal direction Y by a predetermined length L10 from the lower end edge of the front waist holding area 49b toward the crotch area 16 in the front and rear waist panels 18 and 19, and is adjacent to the front waist holding area 49b. It is arranged like this. Therefore, the waist center region 51b is formed by the front waist center region 49c and the rear waist panel 19 that are located at the same position in the longitudinal direction Y.
  • the front waist central area 49c is formed so as to include a part of the front end edge 58a of the absorbent core 58 and one front waist elastic body 33, for example.
  • the rear waist central region 50c does not include the absorbent core 58, and is formed to include, for example, one rear waist elastic body 34.
  • the front and rear waist central areas per unit length in the longitudinal direction Y are set. It is possible to increase the stretching stress in the waist direction of the front and rear waist holding regions 49b and 50b per unit length in the longitudinal direction Y, compared to the stretching stress in the waist direction of 49c and 50c.
  • the extension stress in the front and rear waist central regions 49c and 50c is set to be relatively small.
  • the elongation stress in the leg elastic region 62 can be set small. Therefore, even if the elongation stress of the leg elastic region 62 is lowered, the diaper 10 can be prevented from shifting downward.
  • the elastic crotch panel 13 is formed from a liquid-impermeable crotch sheet 44.
  • the crotch sheet 44 may be a single-layer or multi-layer sheet member formed of various known fiber nonwoven fabrics or moisture-permeable plastic films.
  • the elastic crotch panel 13 has front and rear end portions 46 and 47 and an intermediate portion 48 positioned between the front and rear end portions 46 and 47.
  • the front and rear end portions 46 and 47 are located on the non-skin facing surface side, and the skin facing surface on the inner end edges 18a and 19a side of the front and rear waist panels 18 and 19 through a joining region formed by applying a hot melt adhesive. Fixed to.
  • the intermediate part 48 is fixed to the liquid absorption structure 11 located in the skin opposing surface side.
  • the liquid absorbing structure 11 has a vertically long pad shape, front and rear end portions 54 and 55, an intermediate portion 56, an absorbent core 58 extending in the longitudinal direction Y at least in the crotch region 16, and the skin of the absorbent core 58.
  • the body side liner (top sheet) 59 located on the facing surface side
  • the outer cover (back sheet) 60 located on the non-skin facing surface side of the absorbent core 58
  • the protection located on the non-skin facing surface side of the outer cover 60.
  • a leaky sheet 61 An appropriate adhesive, such as a hot melt adhesive, is applied to the liquid absorbing structure 11 in a known pattern over almost the entire non-skin facing surface.
  • the front and rear end portions 54 and 55 are respectively fixed to the skin facing surfaces of the front and rear waist panels 18 and 19 through the adhesive, and the intermediate portion 56 is fixed to the skin facing surface of the elastic crotch panel 13 through the adhesive. Fixed to. As shown in FIG. 3, the front end portion 54 of the liquid absorbing structure 11 is fixed to the skin-facing surface of the waist inner layer 24 of the front waist panel 18, and the rear end portion 55 is connected to the waist inner layer 25 of the rear waist panel 19. It fixes to the skin opposing surface of the waist outer layer 27 between the waist outer layers 27.
  • the wearer's skin is directly touched by the relatively flexible waist inner layer 24 having stretch elasticity, so that the skin feels. improves.
  • the rear end portion 55 is fixed between the waist inner layer 25 and the waist outer layer 27, the excreted body fluid diffuses and the rear of the liquid absorbing structure 11 located in the rear waist region 15 from the crotch region 16. Even if it diffuses to the end 55, it is possible to prevent body fluid from directly touching the wearer's skin.
  • Absorbent core 58 has a mass of about 300-900 g / m 2 and is formed from a mixture of wood fluff pulp, superabsorbent polymer particles (SAP) and optionally included heat-bondable staple fibers. (Not shown) and a liquid permeable nonwoven fabric (not shown) covering the core material.
  • various known fiber nonwoven fabrics such as a liquid-permeable spunbond fiber nonwoven fabric and SMS fiber nonwoven fabric having a mass of about 10 to 30 g / m 2 can be used.
  • a liquid-impervious spunbond nonwoven fabric for the outer cover 60, a liquid-impervious spunbond nonwoven fabric, an SMS nonwoven fabric, a moisture-permeable plastic sheet, a laminate sheet of a fiber nonwoven fabric and a plastic sheet, or the like having a mass of about 10-30 g / m 2 can be used.
  • the absorbent core 58 extends continuously in the vertical direction Y. In the vertical direction Y, the position of the rear end edge 58b is disposed below the position of the front end edge 58a.
  • the front end portion 54 of the liquid absorbing structure 11 has a front end flap 54a formed by a body side liner 59, an outer cover 60, and a leak-proof sheet 61.
  • the rear end portion 55 of the liquid absorbing structure 11 has a rear end flap 55 a formed by the body side liner 59, the outer cover 60, and the leak-proof sheet 61.
  • the separation dimension L3 in the longitudinal direction Y from the front end edge 58a of the absorbent core 58 to the front opening edge 22a is the longitudinal dimension of the absorbent core 58 in the front waist region 14. It is smaller than the dimension L4 in the direction.
  • the longitudinal dimension L5 of the portion extending from the rear end edge 58b of the absorbent core 58 to the rear opening end edge 22b side is the absorbency in the rear waist region 15. It is larger than the dimension L6 of the core 58 in the longitudinal direction Y.
  • the separation dimension L3 in the longitudinal direction Y from the front edge 58a of the absorbent core 58 to the front opening edge 22a in the front waist region 14 is rearward from the rear edge 58b of the absorbent core 58 in the rear waist region 15. It is smaller than the separation dimension L5 in the vertical direction Y to the opening edge 22b.
  • the longitudinal dimension L5 of the portion extending from the rear end edge 58 b of the absorbent core 58 to the rear opening edge 22 b side is the longitudinal dimension Y6 of the absorbent core 58 in the rear waist region 15. Accordingly, the longitudinal dimension Y of the absorbent core 58 having relatively high rigidity in the rear waist region 15 can be reduced, and the rear waist expansion and contraction without the absorbent core 58 in the rear waist region 15 can be achieved.
  • region 50a can be enlarged. Therefore, as shown in FIG.
  • the wearer's waist has an abdomen protruding outward and a back part recessed inward.
  • a force is applied to the front and rear waist panels of the diaper in a direction protruding outward, but the front and rear waist panels are pressed against the waist by the contraction force of the waist elastic body.
  • the separation dimension L3 in the longitudinal direction Y from the front edge 58a of the absorbent core 58 to the front opening edge 22a is such that the longitudinal direction Y from the rear edge 58b of the absorbent core 58 to the rear opening edge 22b. 7 (see FIG.
  • the longitudinal dimension Y4 of the absorbent core in the front waist region 14 in the longitudinal direction Y is set as the absorbent core in the rear waist region 15 as shown in FIGS. It is possible to make the rigidity of the front waist panel 18 that hits the abdomen relatively large while making the rigidity of the rear waist panel 19 that hits the back relatively small. Therefore, on the abdomen side projecting outward, the relatively high rigidity of the front waist panel 18 is weakly pressed against the abdomen, while on the back side having the inwardly recessed portion, the relatively low rigidity of the rear waist panel 19 is It can be strongly pressed by the waist elastic bodies 32, 34 and 36.
  • the diaper 10 considering the unevenness around the waist, the front waist panel 18 and 19 are pressed against the wearer by making the front waist panel 18 and the rear waist panel 19 different in rigidity. Therefore, the diaper 10 can be prevented from shifting downward with respect to the wearer's waist.
  • the separation dimension L1 in the longitudinal direction Y from the outer edge 28b of the front leakproof sheet 28 in the front waist region 14 to the front opening edge 22a is such that the rear leakproof sheet 29 in the rear waist region 15 Since it is larger than the separation dimension L2 in the longitudinal direction Y from the outer edge 29b to the rear opening edge 22b, the length dimension in the longitudinal direction Y of the rear leakproof sheet 29 in the rear waist region 15 can be increased. The excrement can be reliably prevented from leaking from the rear opening edge 22b of the waist opening 22.
  • the dimension L11 of the diaper 10 in the longitudinal direction Y is about 350-600 mm
  • the dimension W1 of the diaper 10 in the lateral direction X is about 300-430 mm
  • the dimension L12 of the crotch region 16 in the longitudinal direction Y is about 180-.
  • the dimension in the longitudinal direction Y of the side edge 18d of the front waist region 14 (same as the dimension in the longitudinal direction Y of the side edge 19d of the rear waist region 15) L13 is preferably about 60-130 mm.
  • the elastic crotch panel 13 also has a pair of elastic side flaps 43 located on the outer side in the lateral direction X from both side edges of the liquid absorbing structure 11.
  • the elastic side flaps 43 are bent portions formed by bending both side portions of the crotch sheet 44, and a plurality of string-like or strand-like leg elastic bodies 52 extending in the longitudinal direction Y arranged in the bent portions. Consists of The front and rear end portions of the elastic side flap 43 (a part of the front and rear end portions 46 and 47 of the elastic crotch panel 13) are fixed outward in the lateral direction X.
  • the elastic side flap 43 includes a non-elastic region 63 disposed at the side edge 11c of the liquid absorbing structure 11, and a leg elastic region where the leg elastic body 52 is disposed outside the non-elastic region 63 in the lateral direction X. 62.
  • leg elastic region 62 a plurality of, for example, thread-like, string-like, or strand-like leg elastic bodies 52 that are spaced apart from each other in the transverse direction X and extend in the longitudinal direction Y are arranged.
  • the leg elastic region 62 may be provided with elasticity by arranging an elastic sheet instead of arranging a plurality of leg elastic bodies 52 in the form of threads, strings or strands.
  • the leg elastic body 52 is an elastic material having a fineness of 210 to 470 dtex, for example, a string, string or strand that is stretched about 1.8 to 3.0 times and attached so as to be shrinkable.
  • the elongation stress of the leg elastic region 62 was measured in the same manner as the elongation stress of the front and rear waist outer elastic regions 37, 40, etc., when a sample of about 30 mm could be cut out from the elastic side flap 43.
  • the sample is cut out so that the dimension in the longitudinal direction Y is constant, the extension force is measured, and the measured value is the extension when the sample width is 30 mm. Converted to stress.
  • the extension force of the leg elastic region 62 can be made lower than that of the front and rear waist outer elastic regions 37 and 40.
  • a force is applied to the front and rear waist panels 18 and 19 to expand and contract in the lateral direction X, while in the leg elastic region 62, a force is applied to the elastic crotch panel 13 to expand and contract in the vertical direction Y. Will be added. At the part where the front and rear waist panels 18 and 19 and the elastic crotch panel 13 intersect, both forces are applied.
  • the front and rear waist outer elastic regions 37 and 40 expand and contract in the longitudinal direction Y. While suppressing this, the diaper 10 can be fitted around the wearer's waist so that it can expand and contract in the lateral direction X.
  • the extension force of the leg elastic region 62 can be made lower than that of the front and rear waist middle elastic regions 39 and 42.
  • a force is applied to the front and rear waist panels 18 and 19 so as to expand and contract in the lateral direction X, while in the leg elastic region 62 a force is applied to the elastic crotch panel 13 so as to expand and contract in the vertical direction Y. Will be added.
  • both forces are applied.
  • the front and rear waist outer elastic regions 37 and 40 expand and contract in the longitudinal direction Y. While suppressing this, the diaper 10 can be fitted around the wearer's waist so that it can expand and contract in the lateral direction X.
  • the diaper 10 that connects the front waist panel 18 and the rear waist panel 19 separated in the longitudinal direction Y by the liquid absorption structure 11 is used, but the front and rear waist regions 14 and 15 and the crotch region 16 are used.
  • the present invention may be applied to a diaper that is constituted by a chassis formed by a continuous sheet member and in which the liquid absorbing structure 11 is disposed on the skin facing surface of the chassis.
  • a diaper that connects the front waist panel and the rear waist panel separated in the vertical direction by the liquid absorbing structure usually includes only an elastic body extending along the vertical direction and an elastic body extending along the horizontal direction. ing.
  • the front and rear waist panels 18 and 19 may be shifted downward with respect to the wearer's waist due to the contraction force of the elastic body extending along the vertical direction.
  • the present invention is particularly effective for the diaper because the front and rear waist panels 18, 19 can be prevented from shifting downward with respect to the wearer's waist.
  • the front and rear leak-proof sheets 28 and 29 have liquid impermeability, and from various visual elements that are visible from the outside on the non-skin facing surfaces of the front and rear leak-proof sheets 28 and 29.
  • a liquid-permeable film and a sheet on which the graphic is printed may be provided separately.
  • the front waist panel 18 contains the front leak-proof sheet 28 and the back waist panel 19 includes the back leak-proof sheet 29 as an example as the front-and-back leak-proof sheets 28 and 29, as an example.
  • the front and rear leak-proof sheets 28 and 29 may be separately provided on the front waist panel 18 and the rear waist panel 19, and one sheet extending from the front waist region 14 to the rear waist region 15 in the longitudinal direction Y. You may comprise a leak-proof sheet.
  • the front waist region 14 of the above-described embodiment has an elastic body non-arrangement region in which no elastic body is disposed between the front waist inner elastic region 38 and the front waist middle elastic region 39 in the longitudinal direction Y.
  • the rear waist region 15 of the above-described embodiment has an elastic body non-arrangement region in which no elastic body is disposed between the rear waist inner elastic region 41 and the rear waist middle elastic region 42 in the longitudinal direction Y.
  • the elongation stress in the front and rear waist outer elastic regions 37 and 41 was demonstrated as a thing larger than the elongation stress in the front and rear waist middle elastic regions 39 and 42.
  • the present invention is not limited to this, and the extension stress in the front and rear waist middle elastic regions 39 and 42 and the extension stress in the front and rear waist outer elastic regions 37 and 41 may be equal.
  • the liquid absorbing structure 11 is formed by an absorbent core 58, a body side liner 59 (top sheet), an outer cover (back sheet) 60, and a leakproof sheet 61.
  • the front waist panel 18 does not include the front leak-proof sheet 28 and the reinforcing layer 30, and the leak-proof sheet 61 of the liquid absorbing structure 11 extends toward the front opening edge 22a.
  • the waist inner layer 24 extends in the longitudinal direction Y to the vicinity of the front opening edge 22a.
  • front waist elastic bodies 31, 33, and 35 are disposed between the waist inner layer 24 and the waist outer layer 26.
  • the leak-proof sheet 61 is disposed between the waist inner layer 24 and the outer cover 60.
  • the absorbent core 58 is covered with a core wrap sheet (not shown).
  • the rear waist panel 19 does not include the rear leak-proof sheet 29 and the reinforcing layer 30, and the leak-proof sheet 61 of the liquid absorbing structure 11 extends toward the rear opening edge 22 b.
  • the waist inner layer 25 extends in the longitudinal direction Y to the vicinity of the rear opening edge 22b.
  • rear waist elastic bodies 32, 34, and 36 are disposed between the waist inner layer 25 and the waist outer layer 27.
  • the leak-proof sheet 61 is disposed between the waist inner layer 25 and the outer cover 60.
  • the separation dimension L ⁇ b> 7 in the longitudinal direction Y from one outer end edge 61 a of the leakproof sheet 61 in the front waist region 14 to the front opening edge 22 a is the leakproof property in the rear waist region 15. It is larger than the separation dimension L8 in the longitudinal direction Y from the other outer edge 61b of the sheet 61 to the rear opening edge 22b.
  • the diaper 10 according to the second embodiment has the same functions and effects as the diaper 10 according to the first embodiment.
  • the cost of parts can be reduced. Easy to manufacture.
  • first graphics 71 are arranged on both sides of the elastic crotch panel 13, and the first graphics 71 are configured to be visible from the non-skin facing surface of the diaper 10. Yes.
  • an area where the first graphic 71 is formed is indicated by reference numeral 72.
  • the first graphic 71 includes a first component 73 extending in the horizontal direction X.
  • the second graphic 74a is formed on the non-skin facing surface of the front leak-proof sheet 28 in the present embodiment, and the second graphic 74a is configured to be visible from the non-skin facing surface of the diaper 10.
  • an area where the second graphic 74 a is formed is indicated by reference numeral 75.
  • the second graphic 74 a is formed, for example, in the full width of the front leak-proof sheet 28 in the lateral direction X.
  • the second graphic 74 a includes a second component 76 extending in the vertical direction Y.
  • a non-display area 80 where the second graphic 74 a is not formed is formed on the front opening edge 22 a side of the area 75 where the second graphic 74 a is formed.
  • a second graphic 74b is formed on the non-skin facing surface of the rear leak-proof sheet 29, and the second graphic 74b is configured to be visible from the non-skin facing surface of the diaper 10.
  • an area where the second graphic 74 b is formed is indicated by reference numeral 77.
  • the second graphic 74 b is formed, for example, in the full width of the rear leak-proof sheet 29 in the lateral direction X.
  • the second graphic 74b includes a second component 78 extending in the vertical direction Y.
  • a non-display area 81 where the second graphic 74b is not formed is formed on the side of the rear opening edge 22b where the second graphic 74b is formed.
  • a plurality of ridges 79 extending in the longitudinal direction Y are generated in the rear waist region 15 due to the contraction of the rear waist elastic body 32 and the rear waist elastic body 34. If the extending direction of the collar 79 generated in the rear waist region 15 and the extending direction of the component 78 constituting the second graphic 74b are the same, the rear opening edge 22b in the rear waist region 15 can be made conspicuous. If the rear waist panel 19 is turned over, it can be easily understood by the wearer or a third party by the second component 78. The same applies to the front waist region 14 side.
  • first graphic 71 and the second graphic 74b are formed to be the same, it is possible to easily understand where the portion that can prevent the excretion portion from leaking is arranged.
  • the front waist panel 18 in the present embodiment has front waist elastic bodies 31, 33, 35 arranged at a predetermined pitch in the longitudinal direction Y, and extends from the front opening edge 22 a to the lower edge.
  • the length dimension in the longitudinal direction Y is divided into three equal parts, the front outer end region 137 located on the front opening edge 22a side, the front inner end region 138 located on the crotch region 16 side, the front outer end region 137 and the front A front intermediate region 139 located between the inner end region 138 and the inner end region 138;
  • the rear waist panel 19 in the present embodiment has rear waist elastic bodies 32, 34, 36 arranged at a predetermined pitch in the longitudinal direction Y, and extends from the rear opening edge 22 b to the lower edge.
  • the length dimension in the longitudinal direction Y is divided into three equal parts, the rear outer end region 140 located on the rear opening edge 22b side, the rear inner end region 141 located on the crotch region 16 side, the rear outer end region 140 and the rear And a rear intermediate region 142 located between the inner end region 141.
  • the correlation between the extension stresses in the respective areas 140-142 of the rear waist area 15 is the rear outer end area 140 ⁇ intermediate area 142>.
  • a rear inner end region 141 is formed. Therefore, even if the elongation stress of the leg elastic region 62 is set to be relatively small, the diaper 10 can be prevented from shifting downward.
  • the correlation of the extension force in the leg elastic region 62 and the rear outer end region 140 satisfies the relationship of the leg elastic region 62 ⁇ the rear outer end region 140.
  • the leg elastic region 62 and the rear intermediate region 142 It is preferable that the relationship between the stretching force and the leg elastic region 62 ⁇ the rear intermediate region 142 is satisfied.
  • the extension force of the leg elastic region 62 is made smaller than that of the rear outer end region 140 and the rear intermediate region 142, it is applied to the rear inner end region 141 by the contraction of the leg elastic region 62. Even if a force for pulling forward is applied, the rear inner end region 141 is not greatly displaced, and the entire rear waist region 15 does not move forward.
  • the rear inner end region 141 is Even if a force to pull it forward is applied by the leg elastic region 62, the portion of the rear waist region 15 where the rear intermediate region 142 and the rear outer end region 140 are located fits the wearer's body and It is located so as to be hooked on the upper end.
  • each component member constituting the pants-type disposable diaper 10 includes various known materials that are commonly used in this type of field, in addition to the materials described herein. The material can be used without limitation.
  • the terms “first”, “second”, and “third” used in the present specification and claims are merely used to distinguish similar elements, positions, and the like.
  • the waist region includes a front opening edge that defines a part of the waist opening, a front waist holding region that is stretchable in a direction around the waist and is positioned on the front opening edge side, and the non-skin of the absorbent core
  • a leak-proof sheet positioned on the opposite surface side, and the rear waist region is a rear opening edge that defines a part of the waist opening, and can be expanded and contracted in a direction around the waist.
  • the separation dimension in the longitudinal direction to the opening edge is larger than the separation dimension in the longitudinal direction from the outer edge of the leakproof sheet to the rear opening edge of the rear waist region, and the absorbent core
  • the vertical dimension from the front edge to the front opening edge is smaller than the vertical dimension from the rear edge to the rear opening edge of the absorbent core.
  • ⁇ Second invention> A longitudinal direction and a lateral direction perpendicular thereto, a skin facing surface and a non-skin facing surface on the opposite side thereof, a front waist region, a rear waist region, and a crotch region located between the front and back waist regions, at least A pants-type disposable absorbent article comprising an absorbent core positioned in the crotch region, wherein a waist opening and a pair of leg openings are defined by joining both side edges of the front and rear waist regions to each other;
  • the waist region has an opening edge that forms part of the waist opening, a waist stretchable region that can be stretched in the direction around the waist, a sheet that forms the waist stretchable region, and the non-skin facing surface of the absorbent core
  • a leak-proof sheet located on the side, the leak-proof sheet extends to the opening edge side from the rear edge of the absorbent core, and the waist stretchable area is at least The longitudinal dimension of the portion formed between the rear edge of the absorbent core and the opening edge, and
  • the pants-type disposable absorbent article according to the present invention disclosed in the above paragraph [0098] includes at least the following embodiments, and the embodiments are adopted separately from each other or in combination.
  • a topsheet that includes the absorbent core and is positioned on the skin-facing surface of the absorbent core; a backsheet that is positioned on the non-skin-facing surface of the absorbent core; and the non-skin of the backsheet A liquid-absorbing structure having the leak-proof sheet disposed on the opposing surface is provided.
  • a top sheet that includes the absorbent core and is positioned on the skin facing surface of the absorbent core; a back sheet that is positioned on the non-skin facing surface of the absorbent core; and the non-skin of the back sheet
  • a liquid-absorbing structure having a liquid-impermeable sheet positioned on the facing surface is provided, and the leak-proof sheet is disposed on the non-skin-facing surface of the liquid-absorbing structure.
  • the absorbent core extends continuously in the longitudinal direction, and the position of the rear end edge of the absorbent core is disposed below the position of the front end edge of the absorbent core in the longitudinal direction.
  • the (4) The front waist holding area and the rear waist holding area are set based on a length dimension from the front opening edge to the front edge of the absorbent core in the front waist area.
  • the rear waist holding area has a portion where the number of sheets forming the front waist holding area is smaller than the number of sheets forming the rear waist holding area.
  • the mass per unit area of the sheet forming the rear waist holding area is smaller than the mass per unit area of the sheet forming the front waist holding area.
  • the front waist region and the rear waist region extend from the lower end edge of the front waist holding region toward the crotch region by a predetermined length in the vertical direction and are adjacent to the front and rear waist holding regions.
  • the rear waist per unit length in the longitudinal direction has a waist central region and a rear waist central region, and is more than the extension stress in the waist direction of the rear waist central region per unit length in the longitudinal direction.
  • the elongation stress in the holding area in the direction around the waist is large.
  • the rear waist holding region includes a rear waist elastic body that is disposed on the non-skin-facing surface side of the liquid absorption structure and extends in the lateral direction, and the rear waist elastic body extends in the waist direction. It extends continuously.
  • a graphic visible from the outside is displayed on the non-skin facing surface of the leak-proof sheet, and the graphic has a component extending in the vertical direction.
  • the rear waist region is a rear outer end region located on the rear opening edge side when the longitudinal length from the rear opening edge to the lower end edge on the crotch region side is divided into three equal parts. And a rear inner end region located on the crotch region side, and a rear intermediate region located between the rear outer end region and the rear inner end region, the rear outer end region, and the rear inner region The correlation between the extension stress in the end region and the rear intermediate region is the rear intermediate region ⁇ the rear outer end region> the rear inner end region.
  • (10) It has a leg elastic region arranged along a part of the leg opening, and the correlation between the extension force in the leg elastic region and the rear outer end region is such that the leg elastic region ⁇ the rear outer region It is an end region, and the correlation between the extension force in the leg elastic region and the rear intermediate region is the leg elastic region ⁇ the intermediate region.
  • Pants-type disposable absorbent articles (disposable pull-on diapers) DESCRIPTION OF SYMBOLS 11 Liquid absorption structure 14 Front waist area 15 Rear waist area 16 Crotch area 18 Front waist panel 19 Rear waist pael 22 Waist opening 22a Front opening edge 22b Rear opening edge 23 Leg opening 28 Front leak-proof sheet (front leakage prevention sheet) Sex sheet) 29 Rear leak-proof sheet (Post-leak seal sheet) 32 1st back waist elastic body 34 2nd back waist elastic body (back waist elastic body) 49a Front waist stretchable region 49b Front waist retaining region 49c Front waist central region 50a Rear waist stretchable region 50b Rear waist retaining region 50c Front waist central region 58 Absorbent core 58a Front end edge 58b Rear end edge 59 Body side liner (top sheet) 60 Outer cover (back sheet) 61 Leakproof sheet 62 Leg elastic region 74a Second graphic 76 Second component (component) 137 Front outer edge area 138 Front inner edge area 139 Front middle area 140 Re

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  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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PCT/JP2014/075373 2013-11-09 2014-09-25 パンツ型の使い捨て吸収性物品 WO2015068486A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR112016010078-6A BR112016010078B1 (pt) 2013-11-09 2014-09-25 Artigo absorvente descartável tipo calça
KR1020167014009A KR20160083018A (ko) 2013-11-09 2014-09-25 팬티형의 일회용 흡수성 물품
CN201480061225.6A CN105705123B (zh) 2013-11-09 2014-09-25 内裤型的一次性吸收性物品
AU2014345091A AU2014345091B2 (en) 2013-11-09 2014-09-25 Pant-type disposable absorbent article
PH12016500590A PH12016500590A1 (en) 2013-11-09 2016-04-01 Pant-type disposable absorbent article

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JP2013232623A JP6243196B2 (ja) 2013-11-09 2013-11-09 パンツ型の使い捨て吸収性物品
JP2013-232623 2013-11-09

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KR (1) KR20160083018A (zh)
CN (1) CN105705123B (zh)
AU (1) AU2014345091B2 (zh)
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Publication number Priority date Publication date Assignee Title
WO2018094676A1 (en) * 2016-11-25 2018-05-31 The Procter & Gamble Company Wearable article having elastic belt
WO2018094675A1 (en) * 2016-11-25 2018-05-31 The Procter & Gamble Company Wearable article having elastic belt
CN109475444A (zh) * 2016-11-22 2019-03-15 尤妮佳股份有限公司 一次性穿着物品
EP3560464A1 (en) * 2018-04-27 2019-10-30 Unicharm Corporation Pants-shaped absorbent article and method for manufacturing pants-shaped absorbent article

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Publication number Priority date Publication date Assignee Title
JP6993133B2 (ja) * 2017-07-31 2022-01-13 ユニ・チャーム株式会社 吸収性物品

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