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WO2025205652A1 - Article absorbant de type culotte - Google Patents

Article absorbant de type culotte

Info

Publication number
WO2025205652A1
WO2025205652A1 PCT/JP2025/011532 JP2025011532W WO2025205652A1 WO 2025205652 A1 WO2025205652 A1 WO 2025205652A1 JP 2025011532 W JP2025011532 W JP 2025011532W WO 2025205652 A1 WO2025205652 A1 WO 2025205652A1
Authority
WO
WIPO (PCT)
Prior art keywords
pants
absorbent article
type absorbent
longitudinal direction
elastic members
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/JP2025/011532
Other languages
English (en)
Japanese (ja)
Inventor
雄紀 奈良
英人 宇都宮
伸亨 加藤
健太 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
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 JP2024048789A external-priority patent/JP2025148167A/ja
Priority claimed from JP2024048787A external-priority patent/JP2025148165A/ja
Priority claimed from JP2024048788A external-priority patent/JP2025148166A/ja
Priority claimed from JP2024089430A external-priority patent/JP2025181444A/ja
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of WO2025205652A1 publication Critical patent/WO2025205652A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • A61F13/496—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 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
    • A61F13/51—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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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
    • A61F13/531—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 having a homogeneous composition through the thickness of the pad
    • A61F13/532—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 having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • 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
    • A61F13/531—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 having a homogeneous composition through the thickness of the pad
    • A61F13/532—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 having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A61F13/533—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 having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/07—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/18—Containers, packaging elements or packages, specially adapted for particular articles or materials for wearing apparel, headwear or footwear

Definitions

  • the present invention was made in consideration of the above-mentioned problems, and its purpose is to provide a pants-type absorbent article that has crotch elastic members and makes it easy to put the legs through the leg openings when worn.
  • the buttocks elastic members are arranged linearly in the left-right direction, which prevents the area surrounding the buttocks elastic members from protruding away from the skin and forming pocket-like spaces. This prevents the legs from getting caught in the pocket-like spaces when putting the legs through the leg openings. Furthermore, because the crotch elastic members and the buttocks elastic members are spaced apart, the buttocks elastic members are less likely to be pulled forward when the crotch elastic members contract. This prevents the gap between the crotch elastic members and the buttocks elastic members from narrowing, making it easier for the leg openings to open. This makes it easier to put the legs through the leg openings when putting the article on.
  • a pants-type absorbent article according to any one of Aspects 1 to 4, wherein the width of the crotch elastic region in the left-right direction is equal to or less than half the minimum width of the absorbent core.
  • a pants-type absorbent article according to any one of Aspects 1 to 5, wherein the absorbent core has a constricted portion in the center in the longitudinal direction that is narrower in width in the left-right direction than the ends in the longitudinal direction, and the crotch elastic members are arranged in a position that overlaps with the constricted portion in the longitudinal direction.
  • the absorbent core when worn, is more likely to deform convexly toward the skin at the waistband, which is the portion that is sandwiched between the wearer's groin. This makes it less likely that the highly rigid side edges of the absorbent core will interfere with the space between the wearer's legs (groin) when the wearer places their legs through the leg openings. This reduces the likelihood that the absorbent core will feel stiff in the wearer's groin, and also makes it less likely that the wearer's legs will get caught on the sides of the absorbent core when placing their legs through the leg openings.
  • the width of the main body joint is narrowed in the area where the adhesive-free portion is formed, thereby narrowing the distance between the portions (leakage preventing walls) that rise from the waistband member toward the skin on both the left and right sides of the absorbent main body. Therefore, when putting on the article and passing the legs through the leg openings, the leakage preventing walls are less likely to interfere with leg movement in the inner region in the left-right direction of the crotch area (near the groin). This makes it easier to pass the legs through the leg openings when putting on the article.
  • the distance between the leakage preventing walls in the left-right direction narrows near the front of the crotch area, making it less likely that the toes will get caught on the periphery of the leg openings when putting the article on, thereby making it easier to put the legs through the leg openings when putting the article on.
  • a pants-type disposable diaper 1 (hereinafter also referred to as "diaper 1") will be described as an example of a pants-type absorbent article according to the present invention.
  • the pants-type absorbent article according to the present invention is not limited to the above and can also be used as a sanitary napkin, sanitary shorts, etc.
  • the diaper 1 has a longitudinal direction, a left-right direction, and a thickness direction (a direction passing through the paper in Figure 2) that intersect with one another.
  • the left-right direction in the unfolded state in Figure 2 is the same as the left-right direction in the pants-type state in Figure 1.
  • the longitudinal direction in the unfolded state is a direction that follows the up-down direction in the pants-type state.
  • One side in the longitudinal direction corresponds to the front side (ventral side), and the other side corresponds to the rear side (dorsal side).
  • the direction in which the materials that make up the diaper 1 are layered is referred to as the thickness direction.
  • the thickness direction the side that comes into contact with the wearer's skin is referred to as the skin side, and the opposite side is referred to as the non-skin side.
  • the outer layer member 20 is the portion that is positioned around the wearer's waist when the diaper 1 is worn, and hereinafter the outer layer member 20 is also referred to as the "waist member 20.” Furthermore, as shown in FIG. 2, when the diaper 1 is unfolded and stretched, the portion of the waist member 20 that is forward (toward the ventral side) of the longitudinal center position CL of the diaper 1 is also referred to as the "front waist portion 20f,” and the portion that is rearward (toward the back side) of the longitudinal center position CL of the diaper 1 is also referred to as the "rear waist portion 20b.” When the diaper 1 is folded in half at the longitudinal center position CL from the unfolded state shown in FIG.
  • FIG. 4A is a plan view of the absorbent main body 10 as seen from the skin side.
  • Fig. 4B is a schematic cross-sectional view of the absorbent main body 10 at a longitudinal center position CL.
  • the absorbent main body 10 includes an absorbent core 11 that absorbs and retains excretory liquids such as urine, a liquid-permeable top sheet 12 (e.g., a nonwoven fabric) arranged closer to the skin than the absorbent core 11, a liquid-impermeable back sheet 13 (e.g., a resin film such as polyethylene or polypropylene) arranged closer to the skin than the absorbent core 11, a liquid-permeable intermediate sheet 15 (e.g., a nonwoven fabric) arranged between the top sheet 12 and the absorbent core 11, a pair of side sheets 16, an elastic member cover sheet 17, and leg gather elastic members 19.
  • a liquid-permeable top sheet 12 e.g., a nonwoven fabric
  • a liquid-impermeable back sheet 13 e.g
  • the absorbent core 11 absorbs and retains excretory liquids such as urine.
  • the surface of the absorbent core 11 may be covered with a liquid-permeable core wrap sheet 18 (e.g., tissue paper).
  • the absorbent core 11 is made of a liquid-absorbent material such as water-retentive fibers or superabsorbent polymers (so-called SAP) molded into a predetermined shape, and in this embodiment, as shown in Figure 4A, it has a roughly hourglass shape with the longitudinal center narrowed inward in the left-right direction.
  • the planar shape of the absorbent core 11 is not particularly limited, and may be molded into a rectangular shape when viewed from above, for example.
  • the left-right width (maximum width) of the absorbent main body 10 is greater than the left-right width (maximum width) of the absorbent core 11.
  • a pair of longitudinally extending leakage prevention walls 60 are provided on both left and right sides of the absorbent body 10. As shown in Figure 4B, portions of the side sheets 16 extending from both left and right sides of the non-skin side of the back sheet 13 are folded at multiple locations and provided on both left and right sides of the skin side of the top sheet 12 to form the leakage prevention walls 60.
  • a leakage prevention wall elastic member 61 e.g., rubber thread
  • the absorbent body 10 also has a longitudinally stretchable crotch elastic member 40 in the left-right center and on the non-skin side of the absorbent core 11 in the thickness direction.
  • the crotch elastic member 40 in this embodiment is attached in a stretched state along the longitudinal direction between the back sheet 13, which is provided on the non-skin side of the absorbent core 11 in the thickness direction, and the elastic member cover sheet 17, which is provided on the non-skin side of the back sheet 13.
  • the crotch elastic member 40 only needs to be provided on the non-skin side of the absorbent core 11; for example, it may be provided between the core wrap sheet 18 (absorbent core 11) and the back sheet 13 on the non-skin side of the absorbent core 11.
  • the back outer layer sheet 22 overlaps with the side joint portion 5 in the longitudinal direction and partially extends beyond the side joint portion 5 toward the crotch.
  • the ventral outer layer sheet 21 and the dorsal outer layer sheet 22 are separated in the longitudinal direction, with the inner layer sheet 23 exposed to the outside as the non-skin side of the diaper 1.
  • the buttocks elastic members 26 are cut in the center in the left-right direction and are positioned so as not to overlap with the absorbent core 11. This prevents the absorbent core 11 from contracting in the left-right direction due to the stretchability of the buttocks elastic members 26. Therefore, when the diaper 1 is worn, the absorbent core 11 can be brought into contact with the wearer's buttocks over a wide area, making it easier to achieve good fit and absorbency.
  • the buttocks elastic members 26 do not necessarily have to be cut in the center, and may be provided continuously from one end to the other in the left-right direction.
  • the diaper 1 of this embodiment has a different configuration for the crotch elastic members 40 and buttocks elastic members 26 than conventional diapers, making it easier to put the legs through the leg openings LH when putting on the diaper.
  • the specific configuration of the crotch elastic members 40 and the buttocks elastic members 26 is described below.
  • the front end 40ef and rear end 40eb of the crotch elastic member 40 refer to the front and rear ends of the portion of the crotch elastic member 40 where the stretching force acts (the so-called effective length portion).
  • the buttocks elastic members 26 and the waist elastic members 24 are less likely to be pulled forward or backward.
  • the buttocks elastic members 26 are less likely to be pulled forward, making it difficult for the distance between the crotch elastic members 40 and the buttocks elastic members 26 to shrink, and making it easier for the leg openings LH to open. This makes it easier to put the legs through the leg openings LH when putting on the diaper 1.
  • the width W40 of the crotch elastic region ER in the left-right direction of the diaper 1 be equal to or less than 1/2 of the maximum width W11a of the absorbent core 11 (W40 ⁇ 1/2 ⁇ W11a). If the width W40 of the crotch elastic region ER were greater than 1/2 of the width W11a of the absorbent core 11, the width of the crotch elastic region ER in the left-right direction of the absorbent core 11 would be too large, which could result in a poor fit of the absorbent core 11 when the diaper 1 is worn.
  • the absorbent core 11 of the diaper 1 has a constricted portion 11c in the longitudinal center that is narrower in the left-right direction than both longitudinal ends (see Figure 4A).
  • this constricted portion 11c when the diaper 1 is worn, the edges at both ends of the absorbent core 11 are less likely to interfere with the wearer's crotch area between the legs (groin area), improving the fit.
  • the absorbent core 11 has its narrowest left-right width W11b at a position forward of the longitudinal center position CL. It is more preferable that the width W40 of the crotch elastic region ER be 1/2 or less of the minimum width W11b of the absorbent core 11 (W40 ⁇ 1/2 x W11b). By having the width W40 of the crotch elastic region ER be 1/2 or less of the minimum width W11b of the absorbent core 11, the center portion in the left-right direction of the waisted portion 11c of the absorbent core 11 is more likely to deform convexly toward the skin, improving the fit of the absorbent core 11 between the wearer's groin and making it less likely that the legs will get caught in the leg openings LH.
  • the crotch elastic members 40 are arranged in a position overlapping the waistband 11c in the longitudinal direction (see Figure 4A). That is, the crotch elastic members 40 are provided in the portion of the absorbent core 11 where the width in the left-right direction is narrower.
  • the absorbent core 11 is more likely to deform convexly toward the skin at the waistband 11c, which is the portion that is sandwiched between the wearer's groin. Therefore, when the wearer puts their legs through the leg openings LH, the edges of the highly rigid absorbent core 11 on both sides in the left-right direction are less likely to interfere with the space between the wearer's legs (groin). This makes it less likely that the absorbent core 11 will feel stiff in the wearer's groin, and also makes it less likely that the wearer's legs will get caught on both sides of the absorbent core 11 when putting their legs through the leg openings LH.
  • Figures 6A and 6B are diagrams illustrating the joining of the absorbent main body 10 and the waistline member 20 (outer layer member 20).
  • Figure 6A is a plan view of the absorbent main body 10 and the waistline member 20 in an unfolded and stretched state
  • Figure 6B is a schematic cross-sectional view of Figure 6A.
  • the main body joint 70 has an adhesive-free portion 75 at its longitudinal center and both left-right ends.
  • the main body joint 70 is formed over almost the entire absorbent body 10 in an area of width W70a in the left-right direction.
  • adhesive-free portions 75 are provided on both left and right sides, so that the left-right width W70b of the main body joint 70 in this portion is narrower than W70a (W70a > W70b).
  • the diaper 1 has a portion near the crotch portion where the main body joint 70 has a narrower left-right width (W70b), making it easier to put the legs through the leg openings LH when wearing the diaper 1.
  • the crotch elastic members 40 are arranged in longitudinal overlapping portions with the adhesive-free portions 75 (see FIG. 6A ). In other words, the adhesive-free portions 75 and the crotch elastic members 40 overlap in longitudinal overlapping portions.
  • the portions of the absorbent main body 10 (absorbent core 11) where the crotch elastic members 40 are arranged undergo convex deformation toward the skin, improving fit.
  • the absorbent main body 10 (absorbent core 11) is more likely to naturally undergo convex deformation.
  • the pair of leakage prevention walls 60 standing upright toward the skin at both lateral ends are pulled inward in the lateral direction, making it easier for the leg openings LH to open. This makes it easier to put the legs through the leg openings LH when wearing the garment.
  • the crotch elastic members 40 are arranged so as to overlap, in the longitudinal direction, the position where the width of the waistline member 20 in the left-right direction is narrowest. In other words, there is a portion where the crotch elastic members 40 overlap, in the longitudinal direction, the position where the width of the waistline member 20 in the left-right direction is narrowest.
  • a so-called dry edge is formed in the portion where no adhesive is provided between the narrowest portion of the waistline member 20 and the outer end of the main body joint 70 (i.e., the adhesive-free portion 75). Therefore, compared to when the absorbent main body 10 and the waistline member 20 are joined (i.e., when a dry edge is not formed), the rigidity of the narrowest portion of the waistline member 20 can be reduced. This makes it less likely that the legs will get caught in the narrowest part of the waistband member 20 when putting on the diaper 1 and passing them through the leg openings LH.
  • leg gather elastic members 19 that stretch along the longitudinal direction are provided on both left-right side portions of the absorbent body 10.
  • the range over which the stretching force of the leg gather elastic members 19 acts (the so-called effective length range) preferably intersects with at least a portion of the left-right elastic members (the waist elastic members 24, 25 and the buttocks elastic member 26) arranged along the left-right direction.
  • the front end 19ef of the leg gather elastic member 19 is located forward of the waist elastic member 24b, which is arranged at the rearmost position in the front waistline portion 20f, and the two members intersect.
  • the rear end 19eb of the leg gather elastic member 19 is located rearward of the buttocks elastic member 26, which is arranged at the frontmost position in the rear waistline portion 20b, and the two members intersect.
  • the front end of the leg gather elastic member 19 is supported by the waist elastic member 24b, and the rear end is supported by the buttocks elastic member 26.
  • the leg gather elastic members 19 provided on both the left and right sides of the absorbent main body 10 are supported at both longitudinal ends (the front upper end and rear upper end in the pants-type state) by the waist elastic members 24 and the buttocks elastic members 26. Supporting both ends of the absorbent main body 10 by the leg gather elastic members 19 prevents the absorbent main body 10 from sagging downward. This makes it easier to put the legs through the leg openings LH while preventing a deterioration in fit during use.
  • the length (effective length) of the stretchable portion of the crotch elastic member 40 in the longitudinal direction is equal to or less than half the length (effective length) of the stretchable portion of the leg gather elastic member 19.
  • the distance (effective length) between the front end 19ef and the back end 19eb of the stretchable portion of the leg gather elastic member 19 in the longitudinal direction is L19
  • the distance (effective length) between the front end 40ef and the back end 40eb of the stretchable portion of the crotch elastic member 40 in the longitudinal direction is L40, then L40 ⁇ 1 ⁇ 2 ⁇ L19.
  • the effective length L40 of the crotch elastic members 40 is made less than half the effective length L19 of the leg gather elastic members 19, it is possible to more easily prevent the entire absorbent body 10 from shrinking in the longitudinal direction, compared to the reverse case. It also makes it easier to adjust the extent to which the absorbent core 11 deforms convexly toward the skin according to the position of the wearer's excretory opening. Furthermore, by locally deforming only a portion of the absorbent core 11 convexly due to the stretching force of the crotch elastic members 40, it is possible to easily put the legs through the leg openings LH while achieving a good fit in the crotch area.
  • the rear waistband portion 20b is provided with a buttocks elastic member 26 that is arranged in a straight line, without curving, along the left-right direction, forward of the longitudinal front end 5beb of the side joint portion 5. Because the buttocks elastic member 26 is arranged parallel to the waistband elastic member 25, even when the elastic members 26, 25 contract, the fabrics (the back outer sheet 22 and inner sheet 23) that make up the waistband portion 20b are unlikely to form a pocket-like space that convex toward the non-skin side, as illustrated in Figure 5B. This prevents the legs from getting caught during the putting-on operation.
  • a pants-type diaper 2 (hereinafter also referred to as "diaper 2") having a configuration partially different from that of the first embodiment will be described.
  • Fig. 9 is a three-view diagram illustrating the configuration of the diaper 2 of the second embodiment.
  • the diaper 2 of the second embodiment has a liquid-absorbent absorbent body 10 and a waistband member 20 arranged on the non-skin side of the absorbent body 10.
  • the configuration of the waistband member 20 of the diaper 2 differs from that of the diaper 1 of the first embodiment.
  • the waistband member 20 of the diaper 2 has an outer layer sheet 27 provided on the non-skin side of the inner layer sheet 23.
  • the outer layer sheet 27 is a continuous sheet from one end (front side) to the other end (rear side) in the longitudinal direction, and corresponds to a sheet member in which the ventral side outer layer sheet 21 and the dorsal side outer layer sheet 22 of the diaper 1 are integrated.
  • the configuration other than the outer layer sheet 27 is basically the same as that of the diaper 1.
  • the rear waistband portion 20b of the diaper 2 has a buttocks elastic member 26 disposed in a straight line, without curving, along the left-right direction, forward of the longitudinal front end 5beb of the side joint 5. Because the buttocks elastic member 26 is disposed parallel to the waistband elastic member 25, even when the elastic members 26, 25 contract, the fabrics (outer layer sheet 27 and inner layer sheet 23) convex toward the non-skin side of the fabric convex pocket-like spaces as illustrated in Figure 5B are unlikely to form. This prevents the legs from getting caught during the putting on operation.
  • the diaper 3 of the third embodiment has a liquid-absorbent absorbent body 10 and a waistband member 20 arranged on the non-skin side of the absorbent body 10.
  • the waistband member 20 is divided into a front side (ventral side) and a rear side (back side), and is composed of two members: a front waistband section 20f and a rear waistband section 20b.
  • the diaper 3 is a pants-type absorbent article with a so-called three-piece structure, in which the front waistband section 20f and the rear waistband section 20b are arranged with a gap between them in the longitudinal direction, and the absorbent body 10 is arranged to span between the front waistband section 20f and the rear waistband section 20b.
  • the rear waistband portion 20b of the diaper 3 comprises a dorsal outer layer sheet 22, a dorsal inner layer sheet 23b disposed on the skin side of the dorsal outer layer sheet 22 and having substantially the same shape as the dorsal outer layer sheet 22, and a plurality of waistband elastic members 25 and buttocks elastic members 26 disposed between the dorsal outer layer sheet 22 and the dorsal inner layer sheet 23b.
  • the buttocks elastic members 26 are provided in the rear waistband portion 20b of the diaper 3, forward of the longitudinal front end 5beb of the side joint portion 5, and are arranged in a straight line without curving in the left-right direction. Because the buttocks elastic members 26 are arranged parallel to the waistband elastic members 25, even when the elastic members 26, 25 contract, a pocket-like space that protrudes toward the non-skin side, as described in Figure 5B, is unlikely to form. This prevents the legs from getting caught during the putting on operation.

Landscapes

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

Abstract

Un article absorbant de type culotte (1) comprend un corps absorbant (10) pourvu d'un noyau absorbant (11), et un élément de taille (20) pourvu d'une partie taille antérieure (20f) et d'une partie taille postérieure (20b), la partie taille antérieure (20f) et la partie taille postérieure (20b) étant liées l'une à l'autre par une paire de parties liées latérales (5) de façon à former une paire d'ouvertures de jambe (LH). Un élément élastique d'entrejambe (40) qui s'étire le long du sens longitudinal est prévu ; la partie taille postérieure (20b) comprend des éléments élastiques de fesses (26) agencés de manière rectiligne le long du sens gauche/droite, antérieurs à une extrémité antérieure (5beb) des parties liées latérales (5) ; et une extrémité postérieure (40eb) de l'élément élastique d'entrejambe (40) dans le sens longitudinal est située à l'avant de l'élément élastique de fesses (26) qui est agencé sur le côté le plus antérieur de la partie taille postérieure (20b).
PCT/JP2025/011532 2024-03-25 2025-03-24 Article absorbant de type culotte Pending WO2025205652A1 (fr)

Applications Claiming Priority (14)

Application Number Priority Date Filing Date Title
JP2024-048789 2024-03-25
JP2024048789A JP2025148167A (ja) 2024-03-25 2024-03-25 吸収性物品
JP2024048787A JP2025148165A (ja) 2024-03-25 2024-03-25 パンツ型吸収性物品
JP2024-048788 2024-03-25
JP2024-048787 2024-03-25
JP2024048788A JP2025148166A (ja) 2024-03-25 2024-03-25 パンツ型吸収性物品の収容体
JP2024089430A JP2025181444A (ja) 2024-05-31 吸収性物品
JP2024089429A JP2025181443A (ja) 2024-05-31 パンツ型吸収性物品の収容体
JP2024089431A JP2025181445A (ja) 2024-05-31 パンツ型吸収性物品
JP2024-089429 2024-05-31
JP2024-089430 2024-05-31
JP2024-089431 2024-05-31
JP2024-145110 2024-08-27
JP2024145110 2024-08-27

Publications (1)

Publication Number Publication Date
WO2025205652A1 true WO2025205652A1 (fr) 2025-10-02

Family

ID=97216094

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/011532 Pending WO2025205652A1 (fr) 2024-03-25 2025-03-24 Article absorbant de type culotte

Country Status (1)

Country Link
WO (1) WO2025205652A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012187152A (ja) * 2011-03-08 2012-10-04 Unicharm Corp 使い捨て着用物品
JP2019198590A (ja) * 2018-05-18 2019-11-21 ユニ・チャーム株式会社 パンツ型吸収性物品
JP2023126120A (ja) * 2022-02-28 2023-09-07 王子ホールディングス株式会社 吸収性物品

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012187152A (ja) * 2011-03-08 2012-10-04 Unicharm Corp 使い捨て着用物品
JP2019198590A (ja) * 2018-05-18 2019-11-21 ユニ・チャーム株式会社 パンツ型吸収性物品
JP2023126120A (ja) * 2022-02-28 2023-09-07 王子ホールディングス株式会社 吸収性物品

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