WO2022270417A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2022270417A1
WO2022270417A1 PCT/JP2022/024242 JP2022024242W WO2022270417A1 WO 2022270417 A1 WO2022270417 A1 WO 2022270417A1 JP 2022024242 W JP2022024242 W JP 2022024242W WO 2022270417 A1 WO2022270417 A1 WO 2022270417A1
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WO
WIPO (PCT)
Prior art keywords
core
absorbent article
absorbent
skin
article according
Prior art date
Application number
PCT/JP2022/024242
Other languages
English (en)
Japanese (ja)
Inventor
亮太 蔵前
久記 渡邊
信也 佐藤
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN202280042624.2A priority Critical patent/CN117500466A/zh
Publication of WO2022270417A1 publication Critical patent/WO2022270417A1/fr

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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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • 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
    • A61F13/534—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 an inhomogeneous composition through the thickness 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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/535—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes

Definitions

  • the present invention relates to an absorbent article with a leak-proof cuff.
  • An absorbent article such as a disposable diaper, which has a vertical direction corresponding to the front-rear direction of a wearer and a horizontal direction perpendicular to the vertical direction, has an absorbent body for absorbing and holding body fluids, and both sides along the vertical direction of the absorbent body. It is known to have a pair of leak-tight cuffs that are placed along the skin of the wearer and stand up against the skin of the wearer when worn. In Patent Document 1, the known disposable diaper has a high basis weight portion in the lateral center of the crotch portion corresponding to the wearer's crotch portion, and the high basis weight portion on both sides in the lateral direction. It is described having a low basis weight portion that is lower in basis weight than the basis weight portion.
  • the absorbent body is arranged on the upper absorbent layer and on the farther side from the wearer's skin than the upper absorbent layer and has larger longitudinal and lateral dimensions than the upper absorbent layer. It has a laminated structure with a lower absorbent layer, and the laminated structure forms the high basis weight portion, and the portion where the upper absorbent layer is not laminated on the lower absorbent layer forms the low basis weight portion. Both the upper absorbent layer and the lower absorbent layer are made of a fiber aggregate or a functional material such as water-absorbing polymer particles held therein.
  • FIG. 2 of Patent Document 1 shows the skin-facing side of the diaper in an unfolded and stretched state. According to FIG.
  • Patent Document 2 discloses a disposable diaper having an absorbent body of a two-layer structure similar to the diaper described in Patent Document 1, wherein one layer of the two-layer structure is composed of a substrate layer made of nonwoven fabric and a thermoplastic material. It is described to have a structure in which a water-absorbent polymer is interposed therebetween.
  • the present invention has an abdominal portion arranged on the abdomen side of the wearer when worn, a dorsal portion arranged on the back side of the wearer, and a crotch portion located therebetween, and from the abdominal portion to the crotch portion.
  • an absorbent body having a longitudinal direction extending to the dorsal side portion through a portion thereof and a lateral direction perpendicular to the longitudinal direction and absorbing and retaining bodily fluid;
  • the present invention relates to an absorbent article having a pair of leak-proof cuffs arranged from an abdominal portion to the dorsal portion.
  • the absorbent body has a laminated structure of a first core and a second core arranged farther from the wearer's skin than the first core,
  • the second core preferably has a structure in which a water-absorbent polymer is interposed between base sheets arranged opposite to each other in the thickness direction of the absorbent body.
  • each of the pair of leak-proof cuffs has, at least at the crotch portion, an upright portion that rises toward the wearer's skin when worn, and is in an unfolded and maximally stretched state.
  • one of the leakage-preventing cuffs and the other of the leakage-preventing cuffs are separated from each other via a separation portion.
  • the crotch portion has an overlapping portion between the upright portion and the second core.
  • a region near the abdominal portion of the absorbent article is referred to as the abdominal region.
  • the dorsal region when the region closer to the dorsal region in the absorbent article is defined as the dorsal region, at least one of the dorsal region and the dorsal region is outside the overlapping portion of (ii) in the longitudinal direction In the lateral position, the leak-proof cuff and the first core overlap.
  • FIG. 1 is a perspective view schematically showing the natural state of an underpants-type disposable diaper, which is one embodiment of the absorbent article of the present invention.
  • the term "natural state” means a state in which the absorbent article is not stretched (relaxed state) without applying an external force to each elastic member arranged in the absorbent article.
  • FIG. 2 is a developed plan view schematically showing the side facing the skin (the top sheet side) of the diaper shown in FIG. 1 in the developed and maximum stretched state.
  • FIG. 3 is a cross-sectional view schematically showing the II line cross section of the diaper shown in FIG. 2 (the cross section along the thickness direction and the lateral direction).
  • FIG. 4 is a cross-sectional view schematically showing a II-II cross section (a cross section along the thickness direction and the lateral direction) of the diaper shown in FIG. 5 is a cross-sectional view schematically showing the natural state of the diaper shown in FIG. 3.
  • FIG. 6 is a cross-sectional view schematically showing the natural state of the diaper shown in FIG. 4.
  • FIG. 7 is a view corresponding to FIG. 2 of an underpants-type disposable diaper that is another embodiment of the absorbent article of the present invention.
  • FIG. 8 is a view corresponding to FIG. 2 of an underpants-type disposable diaper, which is still another embodiment of the absorbent article of the present invention.
  • FIG. 9 is a view corresponding to FIG. 3 of an underpants-type disposable diaper that is still another embodiment of the absorbent article of the present invention.
  • 10 is a cross-sectional view schematically showing the natural state of the diaper shown in FIG. 9.
  • FIG. 9 is a view corresponding to FIG. 3 of an underp
  • the leak-preventing cuff stands up when the wearer wears the absorbent article, thereby preventing so-called side leakage, in which excrement such as urine excreted by the wearer leaks outward in the lateral direction of the diaper. be done.
  • the leakage-preventing cuff which should be in an upright state, may fall down due to body pressure. and leaked out laterally of the diaper.
  • the present invention relates to providing an absorbent article with excellent side leakage prevention performance.
  • Other features, advantages and embodiments of the invention are described below.
  • the diaper 1 has an abdominal portion F arranged on the abdomen side of the wearer when worn, a dorsal portion R arranged on the dorsal side of the wearer, and a position between the abdominal portion F and the dorsal portion R. It has a crotch part M that extends from the abdominal part F to the back part R via the crotch part M, and has a longitudinal direction X corresponding to the front and back direction of the wearer and a lateral direction Y orthogonal to the longitudinal direction X.
  • the diaper 1 also includes an absorbent body 5 that absorbs and retains bodily fluids, and a pair of anti-leakage cuffs 8 that are arranged along both sides of the absorbent body 5 along the longitudinal direction X from the ventral side F to the back side R. 8.
  • the crotch portion M extends in the longitudinal direction X across the longitudinal center line CLx of the diaper 1 .
  • the vertical center line CLx is an imaginary straight line extending in the horizontal direction Y by halving the diaper 1 in the unfolded and maximum stretched state as shown in FIG.
  • the crotch part M includes an excretory part facing part (not shown) that faces the wearer's excretory part such as the penis, and is typically the part of the diaper 1 where the length (width) in the lateral direction Y is the shortest. include.
  • the abdominal portion F, the crotch portion M, and the back portion R can be regions when the absorbent article in the unfolded and maximally stretched state is divided into three equal parts in the longitudinal direction X.
  • the term “unfolded and maximally stretched state” means that the absorbent article is flattened into a flattened state, the elastic members of each part of the absorbent article in the expanded state are stretched to the maximum, and the design dimensions, i.e., the It refers to the state in which the dimension is the same as the dimension when it is flattened in a state where the influence of the elastic member is completely eliminated.
  • the absorbent article is cut off at the side seal portions and spread flat to form the expanded state.
  • the diaper 1 is formed symmetrically on one side and the other side with respect to the horizontal center line CLy in the unfolded and maximum stretched state as shown in FIG.
  • the horizontal center line CLy is an imaginary straight line that extends in the vertical direction X and bisects the diaper 1 in the unfolded and maximum stretched state in the horizontal direction Y.
  • the diaper 1 includes an absorbent body 2 including an absorbent body 5 and an outer body 10 arranged on the non-skin facing side of the absorbent body 2 .
  • the absorbent main body 2 and the exterior body 10 are joined by a known joining means such as an adhesive.
  • the outer body 10 is a member that forms the outer shape of the diaper 1 .
  • Peripheral edges of the outer body 10 form outlines of the abdominal portion F and the dorsal portion R of the diaper 1, respectively.
  • the exterior body 10 extends in the lateral direction Y and is located in the ventral part F, and the ventral exterior body 10F is located in the ventral part F.
  • the dorsal exterior body 10R extends in the lateral direction Y and is located in the dorsal part R. and That is, the diaper 1 is a so-called split-type underpants-type disposable diaper in which the exterior body is divided into a member arranged on the abdomen side and a member arranged on the back side.
  • the absorbent main body 2 has a rectangular shape in a plan view, and is arranged in the central portion of the outer package 10 in the lateral direction Y with its longitudinal direction aligned with the longitudinal direction X of the diaper 1, and extends from the abdominal portion F to the dorsal portion R. It extends in the longitudinal direction X over the entire length, and bridges between the ventral exterior body 10F and the dorsal exterior body 10R which are arranged at a predetermined interval in the longitudinal direction X.
  • the term “skin-facing surface” refers to the surface of an absorbent article or its constituent members (e.g., absorbent body) that faces the wearer's skin when the absorbent article is worn, i.e., the surface facing the wearer's skin.
  • the "non-skin facing side” is the side of the absorbent article or its constituent members that faces away from the skin when the absorbent article is worn, that is, the side that is relatively close to the wearer's skin. on the far side.
  • the term "when worn” as used herein means a state in which the absorbent article is maintained in a normal and appropriate wearing position, that is, the correct wearing position of the absorbent article.
  • a pair of side seal portions are formed by joining both side portions of the ventral exterior body 10F along the longitudinal direction X and both side portions of the dorsal exterior body 10R along the longitudinal direction X to each other. S, S are formed. Thereby, the exterior bodies 10F and 10R are connected in a ring.
  • the side seal portion S is formed by a known joining means such as adhesive, heat sealing, ultrasonic sealing, or the like.
  • the diaper 1 also has a waist opening WH through which the wearer's torso is passed, and a pair of leg openings LH and LH through which the wearer's lower legs are passed.
  • the absorbent main body 2 consists of a liquid-permeable surface sheet 3 arranged at a position relatively close to the wearer's skin and a liquid-impermeable or liquid-impermeable surface sheet 3 arranged at a position relatively far from the wearer's skin. It comprises a permeable or water-repellent back sheet 4 and an absorbent body 5 interposed between the two sheets 3,4. These members constituting the absorbent main body 2 are integrated by a known joining means such as an adhesive.
  • the top sheet 3 and the back sheet 4 those commonly used in absorbent articles of this type can be used without particular limitation.
  • As the surface sheet 3 various liquid-permeable sheets can be used, such as nonwoven fabric, woven fabric, and paper.
  • a sheet having a leakproof property specifically, a liquid-impermeable (absolutely liquid-impermeable) or liquid-impermeable (although it cannot be said to be liquid-impermeable, it is difficult for liquid to pass through).
  • properties include a moisture-permeable resin film and a laminate of the resin film and a nonwoven fabric.
  • the absorbent body 5 has a shape elongated in one direction, such as a rectangular shape in plan view, and is arranged so that its longitudinal direction coincides with the longitudinal direction X of the diaper 1. ing.
  • the absorber 5 is arranged in the crotch portion M.
  • the absorber 5 is continuous from the abdominal portion F to the back portion R via the crotch portion M.
  • the topsheet 3 traverses the side of the absorbent body 5 facing the skin in the horizontal direction Y, and from both side edges of the topsheet 3 along the vertical direction X of the absorbent body 5 is wound around the non-skin facing surface side of the absorbent body 5 (more specifically, the second core 7 described later).
  • the pair of extending portions of the surface sheet 3 are respectively fixed to a cuff sheet 80 forming the main body of the leak-proof cuff 8 described later, and a pair of fixing portions 83 are formed between the surface sheet 3 and the cuff sheet 80. It is The surface sheet 3 does not cover the entire non-skin facing surface of the absorbent body 5, but covers the central portion of the non-skin facing surface of the absorbent body 5 in the lateral direction Y (the portion located between the pair of fixing portions 83, 83). ) is not covered with the top sheet 3 .
  • the surface sheet 3 thus has a size capable of covering the entire skin-facing surface of the absorbent body 5, and covers the skin-facing surface of the absorbent body 5 and both sides of the absorbent body 5 along the longitudinal direction X.
  • the edges are covered over their entire area, and furthermore, a predetermined range is covered inward in the lateral direction Y from the both side edges of the non-skin-facing surface of the absorbent body 5 .
  • the absorbent body 5 has a laminated structure of a first core 6 and a second core 7 arranged farther from the wearer's skin than the first core 6 .
  • the second core 7 has a structure in which a water-absorbent polymer 72 is interposed between base sheets 71, 71 arranged opposite to each other in the thickness direction of the absorbent body 5. ing.
  • the first core 6 is typically mainly composed of an aggregate of fibrous water-absorbing materials, and such fiber aggregates may contain small pieces of water-absorbing polymer as necessary.
  • An absorbent body mainly composed of such a fiber assembly can be manufactured according to a conventional method using a conventionally known fiber stacking device.
  • the fibrous water-absorbing material preferably has a property (water-absorbing property) capable of absorbing body fluids such as urine, feces, sweat, and blood. Examples include natural fibers such as wood pulp, hydrophilic synthetic fibers, and the like. and can be used singly or in combination of two or more.
  • the water-absorbent polymer those conventionally used in this type of absorber can be used without particular limitation, and examples thereof include polymers or copolymers of acrylic acid or alkali metal salts of acrylic acid.
  • the second core 7 has a configuration in which a plurality of particulate water-absorbing polymers 72 are fixed to a base sheet 71, and is thinner and more flexible than the first core 6, which is mainly composed of a fiber assembly. It is characterized by high As the base sheet 71, a liquid-permeable sheet is preferable, and for example, paper, nonwoven fabric, or the like can be used. As the water-absorbent polymer, which is the raw material of the water-absorbent polymer 72, those conventionally used in this type of absorber can be used without particular limitation, and the same one used in the first core 6 may be used.
  • the base sheets 71, 71 and the base sheet 71 and the water-absorbing polymer 72 may be bonded together with an adhesive.
  • the content of the water-absorbing polymer in the second core 7 is not particularly limited, it is preferably 80% by mass or more with respect to the total mass of the second core 7 from the viewpoint of further strengthening the above characteristics.
  • Both cores 6 and 7 may be covered with a core wrap sheet (not shown) on their skin-facing surfaces and/or non-skin-facing surfaces. In that case, both cores 6 and 7 may be individually covered with a core wrap sheet, or both cores 6 and 7 may be integrally covered with a core wrap sheet.
  • a core wrap sheet a liquid-permeable sheet is preferable, and for example, paper, nonwoven fabric, or the like can be used. Note that the core wrap sheet is a constituent member of the absorbent body 5 .
  • the first core 6 and the second core 7 are different in shape and size in plan view. That is, in a plan view of the diaper 1 in the unfolded and maximum stretched state as shown in FIG. 2, the second core 7 has a rectangular shape, whereas the first core 6 has a length (width) A wide portion 61 having a relatively long width, a narrow portion 62 having a relatively short length (width) in the horizontal direction Y, and positioned between both portions 61 and 62, In the vertical direction X, there is a width changing portion 63 whose length (width) in the horizontal direction Y gradually increases toward the vertical direction X. As shown in FIG.
  • the end (abdominal end) in the longitudinal direction X on the ventral side F side of the first core 6 is the wide portion 61, and the end in the longitudinal direction X (dorsal side) on the dorsal side R side of the first core 6 is the wide width portion 61. end) is the narrowed portion 62 .
  • the width of the wide portion 61 is substantially the same as the width of the second core 7 (see FIG. 4), while the width of the narrow portion 62 is narrower than the width of the second core 7 (see FIG. 3).
  • the two cores 7 have a pair of extensions 7E, 7E extending outward in the lateral direction Y from side edges along the longitudinal direction X of the first core 6 (narrow width portion 62) at least in the crotch portion M. doing.
  • the first core 6 has a shorter length in the vertical direction X than the second core 7, and extends inward in the vertical direction X by a predetermined distance from the end in the vertical direction X on the dorsal portion R side of the second core 7. , is a region where the first core 6 is not arranged. In the diaper 1, the first core 6 is biased toward the abdomen F side.
  • the outer covering 10 of the diaper 1 includes the abdominal outer covering 10F and the back outer covering 10R, which are members independent of each other.
  • the abdomen-side exterior body 10F has a rectangular shape elongated in the horizontal direction Y in the unfolded and maximum stretched state of the diaper 1 shown in FIG.
  • the back exterior body 10R has a rectangular shape elongated in the horizontal direction Y at the end region in the longitudinal direction X farther from the longitudinal center line CLx, and the end in the longitudinal direction X at the side closer to the longitudinal center line CLx.
  • the region has a shape in which the length (width) in the lateral direction Y gradually decreases toward the longitudinal center line CLx.
  • the outer layer sheet 11 is arranged at a position relatively distant from the absorbent body 5 and forms the outer surface of the diaper 1, and the outer layer sheet 11 is arranged at a position relatively close to the absorbent body 5 and forms the inner surface of the diaper 1. It is configured including an inner layer sheet 12 . Both sheets 11 and 12 are bonded together and integrated by known bonding means such as heat sealing and ultrasonic sealing. Both the sheets 11 and 12 forming the exterior body 10 may be sheets of the same type, or may be sheets of a different type.
  • the sheets 11, 12 may be stretchable, in particular stretchable in the lateral Y direction. As the sheets 11 and 12, nonwoven fabrics produced by various methods can be used. Laminated nonwoven fabrics with more than one layer may be mentioned. Also, the sheets 11 and 12 may be composite sheets in which these nonwoven fabrics and films are laminated together.
  • gathers around the waist are formed in the ventral portion F and the dorsal portion R.
  • the waist gathers include an outer body 10 and a plurality of waist gather forming elastic members 13 fixed to the outer body 10 .
  • the plurality of elastic members 13 extend in the width direction Y and are intermittently arranged in the longitudinal direction X.
  • the waist gathers fix the elastic member 13 between the outer layer sheet 11 and the inner layer sheet 12 of the exterior body 10 in a state of being stretched in the width direction Y, and then release the elastic member 13 from the stretched state. It is made by Thereby, the exterior body 10 can exhibit stretchability in the width direction Y. As shown in FIG.
  • the contraction of the elastic members 13 forms a plurality of folds (gathers) extending in the direction crossing the direction of contraction of the elastic members 13 in both the sheets 11 and 12, thereby covering the entire circumference of the wearer's waist.
  • the waist gathers are formed in which the pleats are substantially continuous over the circumference.
  • leg gathers are formed at the leg edges forming the opening edges of the pair of leg openings LH, LH.
  • the leg gather includes an outer body 10 and leg gather-forming elastic members 14 fixed to the outer body 10 .
  • the leg gathers are produced by fixing the elastic member 14 in a stretched state between the outer layer sheet 11 and the inner layer sheet 12 that constitute the exterior body 10, and then releasing the elastic member 14 from the stretched state.
  • the contraction of the elastic members 14 forms a plurality of folds (gathers) extending in the direction crossing the direction of contraction of the elastic members 14 in both sheets 11 and 12, thereby forming the opening edges of the leg openings LH.
  • the leg gathers are formed in which the folds are substantially continuous over the entire circumference of the part.
  • the number of elastic members 14 may be one or plural.
  • Each of the pair of leak-proof cuffs 8, 8 has an upright part 82 at least in the crotch part M that stands up against the wearer's skin when worn, and the diaper 1 in the unfolded and maximum stretched state as shown in FIG.
  • the leak-proof cuff 8 (upright portion 82 ) on one side and that on the other side are separated from each other via a separation portion 85 .
  • the spaced portion 85 is a gap between the free end portion 82F of the upright portion 82 of one of the leak-proof cuffs 8 and the other free end portion 82F of the diaper 1 in the unfolded and fully stretched state.
  • Sheet 3 is exposed.
  • the length (width) W8 in the horizontal direction Y of the spacing portion 85 is constant over the entire length in the vertical direction X of the standing portion 82 (leakage-preventive cuff 8).
  • the leak-preventing cuff 8 is composed of a cuff sheet 80 that forms the main body of the leak-preventing cuff 8 and one or more cuff elastic members 81 that are fixed to the cuff sheet 80 and extendable in the longitudinal direction X. and
  • the leakage-preventing cuffs 8 (cuff sheets 80 ) are arranged continuously along the sides along the longitudinal direction X of the absorbent main body 2 over substantially the entire length in the longitudinal direction X of the absorbent main body 2 .
  • the leakage-preventing cuff 8 is mainly composed of one cuff sheet 80 folded at a fold extending in the longitudinal direction X, and includes facing portions of the cuff sheets 80 formed by folding the cuff sheet 80. I'm in.
  • the cuff elastic member 81 is interposed between the sheets 80, 80 at the facing portion and is fixed to the peripheral cuff sheet 80 by a fixing means such as an adhesive.
  • the cuff elastic member 81 is fixed to the cuff sheet 80 in an elongated state in the vertical direction X at the upright portion 82 , and the upright portion 82 is a stretchable region that can be stretched in the vertical direction X.
  • the standing portion 82 stands up toward the wearer's skin with the fixing portion 83 (see FIGS. 3 and 4) as a standing starting point.
  • the standing portions 82 are portions of the cuff sheet 80 that are not fixed to other members.
  • the fixed portion 83 is a portion where the cuff sheet 80 is fixed to another member by a known joining means such as adhesive or fusion.
  • the other member to which the cuff sheet 80 is fixed in the fixing portion 83 is not particularly limited, and can be appropriately selected from constituent members of the diaper 1 positioned around the cuff sheet 80 at the position where the fixing portion 83 is formed. In this embodiment, the other members are the topsheet 3 and/or the backsheet 4 .
  • the fixing portion 83 extends continuously or discontinuously in the longitudinal direction X over substantially the entire length of the cuff sheet 80 in the longitudinal direction X. As shown in FIG. As the cuff sheet 80, any material that is used as a material for leak-proof cuffs in this type of absorbent article can be used without particular limitation. can be used.
  • As the various elastic members in the diaper 1, including the cuff elastic member 81 various known elastic members commonly used in this type of absorbent article can be used without particular limitation.
  • erection inhibiting portions 84 are formed at both ends of the leak-proof cuff 8 in the longitudinal direction X to inhibit the erection of the cuff sheet 80 .
  • the erection-inhibiting portion 84 is formed in the ventral portion F and the dorsal portion R, and the portion along the vertical direction X sandwiched between the erection-inhibiting portions 84 , 84 is the erecting portion 82 .
  • the erection inhibiting portion 84 is typically formed by fixing the cuff sheet 80 to the skin-facing surface (topsheet 3) of the absorbent body 2, and the fixing portion is formed by a known joining means such as an adhesive or fusion. can be formed.
  • a pair of standing-up inhibiting portions 84, 84 are formed at both ends of the leakage-preventing cuff 8 in the longitudinal direction X, so that when the diaper 1 is worn, the portion sandwiched between the standing-up inhibiting portions 84, 84 is prevented from standing up.
  • the contraction force of the cuff elastic member 81 causes the portion 82 to stand up against the wearer's skin with the fixed portion 83 as the starting point, as shown in FIGS.
  • the erected upright portion 82 prevents body fluids such as urine excreted by the wearer from moving outward in the lateral direction Y. Outward leakage (side leakage) is effectively suppressed.
  • the contractile force of the cuff elastic members 81 causes the diaper 1 as a whole to move toward the non-skin-facing side of the absorbent main body 2 at the central portion in the longitudinal direction X. Since the diaper 1 is curved and deformed so as to be convex (toward the back sheet 4 side), the diaper 1 can easily fit the shape of the wearer's body.
  • the diaper 1 is characterized in that it satisfies all of the following (i) to (iii) in a plan view in the unfolded and maximum stretched state as shown in FIG.
  • the crotch part M "when one imaginary straight line is drawn across the diaper 1 in the lateral direction Y, the length W8 of the portion overlapping the spaced part 85 on the imaginary straight line is A portion longer than the length (width of the first core 6) W6 of the portion overlapping the first core 6” (hereinafter also referred to as “characteristic portion (i)”).
  • the crotch portion M has an overlapping portion between the upright portion 82 and the second core 7 (more specifically, the extension portion 7E).
  • the vertical center line CLx is the "single imaginary straight line".
  • the characteristic portion (i) includes the entire portion of the first core 6 where the narrow portion 62 exists (the portion located at the same position as the narrow portion 62 in the longitudinal direction X), and further, A portion of the width changing portion 63 of the first core 6 near the narrow portion 62 may be included.
  • the diaper 1 Since the diaper 1 satisfies all of the above (i) to (iii), even if the wearer of the diaper 1 takes a sitting posture and the leakage-preventing cuff 8 falls down while wearing the diaper 1, at least the crotch part In M, as shown in FIG. 3, between the leak-proof cuff 8 in the lying down state and the second core 7 (more specifically, the surface sheet 3 covering the skin-facing surface of the second core 7). Since the gap G is formed, excretions such as urine that have moved outward in the lateral direction Y from the first core 6 are temporarily accommodated in the gap G, and the second core 7 (second core 7) overlapping the gap G in plan view. 2 along the longitudinal direction X of the core 7).
  • the diaper 1 can prevent side leakage even if the leakage-preventing cuff 8 is laid down while being worn.
  • the gap G is such that the upright portion 82 of the crotch portion M does not overlap the first core 6 but overlaps the second core 7 (see (i) and (ii) above) in a plan view of the diaper 1 in the unfolded and maximum stretched state. and at least one of the ventral region Fr and the dorsal region Rr, the leak-preventing cuff 8 and the second It is formed by overlapping with one core 6 (satisfying the above (iii)).
  • the upright portion 82 of the leak-proof cuff 8 in the laid-down state is positioned outward in the longitudinal direction X from the overlapping portion of the crotch portion M with the second core 7, as shown in FIG.
  • the overlapping portion of the crotch portion M can be supported from below without the first core 6 being supported from below, as shown in FIG. It can exist with a gap G on the side of the skin-facing surface of the two cores 7 .
  • the formation factors of the gap G are as follows: It may also be a so-called sheet-type absorber having a configuration in which a water-absorbing polymer is interposed between base sheets 71 arranged opposite to each other in the direction.
  • an absorbent body mainly composed of a fiber assembly has relatively high liquid diffusibility, and the liquid absorbed by the absorbent body quickly spreads throughout the body. Therefore, if the second core 7 is mainly composed of a fiber assembly, and if the second core 7 (fiber assembly) absorbs excrement, the excrement is quickly removed from the second core 7 vertically.
  • sheet-type absorbent bodies have lower liquid diffusibility (especially liquid diffusibility in the direction perpendicular to the thickness direction) than those mainly composed of fiber aggregates, and also swell when absorbing liquid. is small and shape retention is excellent, by using a sheet-type absorbent body as the second core 7 disposed on the non-skin-facing side of the first core 6, a gap G is formed which is effective in preventing side leakage. becomes easier.
  • the leak-proof cuff 8 and the first core 6 overlap in the ventral region Fr in the plan view of the diaper 1 in the unfolded and maximum stretched state as shown in FIG. That is, in the present embodiment, as shown in FIG. 2, the wide portion 61 of the first core 6 and the portion of the leak-proof cuff 8 at the same position in the longitudinal direction X as the wide portion 61 of the first core 6 overlap.
  • Such a configuration in which the overlapping portion of the leak-preventing cuff 8 and the first core 6 exists in the ventral region Fr is particularly effective when the wearer of the diaper 1 is a man including a boy. When the wearer is a man, excretions such as urine are more concentrated in the ventral region Fr than in the dorsal region Rr. Since the portion exists in the ventral region Fr, side leakage in the ventral region Fr can be effectively prevented.
  • the first core 6 preferably contains a water absorbing polymer.
  • the content of the water-absorbing polymer in the first core 6 is set to the total mass of the first core 6 from the viewpoint of the balance between the significance of including the water-absorbing polymer in the first core 6 and the prevention of adverse effects caused by an excessive amount of the water-absorbing polymer. On the other hand, it is preferably 45% by mass or more, more preferably 55% by mass or more, and preferably 75% by mass or less, more preferably 65% by mass or less.
  • the fibrous material such as wood pulp in the first core 6 will be damaged.
  • the content of the water-absorbing material decreases, and as a result, the thickness of the first core 6 before liquid absorption decreases, so that the gap G is formed between the leak-proof cuff 8 in the collapsed state and the second core 7 facing it. is difficult to form.
  • the first core 6 When the first core 6 contains a water-absorbent polymer, the first core 6 preferably has a larger basis weight of the water-absorbent polymer than the second core 7 . As a result, the degree of swelling of the first core 6 after absorbing the liquid is further increased, so that the capacity of the gap G can be easily secured, and the side leakage prevention effect of the gap G can be more reliably achieved.
  • the ratio of the basis weight of the water-absorbent polymer in the first core 6 to that in the second core 7 is preferably 1.4 or more, more preferably 1.7 or more, assuming that the former > the latter, and , preferably 3.0 or less, more preferably 2.5 or less.
  • the basis weight of the water-absorbing polymer in the first core 6 is larger than that of the second core 7, it is preferably 140 g/m 2 or more, more preferably 180 g/m 2 or more, and preferably 350 g/m 2 or more. 2 or less, more preferably 280 g/m 2 or less.
  • the basis weight of the water-absorbing polymer in the second core 7 is smaller than that in the first core 6, it is preferably 50 g/m 2 or more, more preferably 90 g/m 2 or more, and preferably 150 g/m 2 or more. 2 or less, more preferably 120 g/m 2 or less.
  • the first core 6 contains a water-absorbing polymer
  • the shape-retaining property of the first core 6 is improved, and the posture of the wearer when wearing the diaper 1 is in a sitting position. Even if a relatively large pressure is applied to the first core 6 by removing the first core 6, the first core 6 is less likely to be crushed, and the capacity of the gap G can be easily secured.
  • the absorbency under pressure is a measure of how much water-absorbent polymer contained in the absorbent body can absorb when the absorbent article is put on and pressure is applied to the absorbent body.
  • the amount of absorption under pressure of 2.0 kPa of the water-absorbing polymer contained in the first core 6 is preferably 25 g. /g or more, more preferably 28 g/g or more.
  • the above-mentioned "under pressure of 2.0 kPa" assumes the pressure applied to the absorbent body when the wearer assumes a sitting posture while wearing the absorbent article.
  • the upper limit of the amount of water-absorbent polymer contained in the first core 6 absorbed under pressure at 2.0 kPa is not particularly limited, the wear due to the excessive level difference between the first core 6 and the second core 7 after absorbing the liquid From the viewpoint of suppressing discomfort at times, it is preferably 45 g/g or less, more preferably 35 g/g or less.
  • the absorbency under pressure of the water-absorbing polymer is measured by the following method.
  • the absorbency under pressure is measured using the measuring method and measuring apparatus described in JP-A-2003-235889. Specifically, the measurement is carried out as follows in an environment with an ambient temperature of 25 ⁇ 2° C. and a relative humidity of 50% ⁇ 5%.
  • the cylindrical plastic tube containing the sample and the weight is immersed vertically in a petri dish (diameter: 120 mm) containing 60 ml of physiological saline with the nylon mesh side facing downward. At this time, the cylindrical plastic tube should be immersed to the depth just below the bottom of the petri dish. After 60 minutes, pull out the cylindrical plastic tube containing the sample and the weight from the water and weigh the mass. Subtract the previously measured mass of the cylindrical plastic tube and the weight to calculate the mass of the saline absorbed by the sample. do. The value obtained by multiplying the mass of this absorbed physiological saline by 10 is defined as the amount absorbed under pressure (g/g).
  • the thickness of the first core 6 in a dry state (before liquid absorption) under a load of 2.0 kPa is , preferably 2 mm or more, more preferably 3 mm or more.
  • the upper limit of the thickness of the first core 6 in a dry state (before liquid absorption) under a load of 2.0 kPa is not particularly limited, but from the viewpoint of suppressing the thickness of the absorbent body 5 and improving the wearing feeling of the diaper 1, etc. It is preferably 7 mm or less, more preferably 5 mm or less.
  • the "thickness of the first core 6 under a load of 2.0 kPa" referred to here is the thickness of a portion of the first core 6 that is related to the formation of the gap G. It is the thickness of the portion overlapping the leak-proof cuff 8 in plan view of the diaper 1 in the unfolded and maximum stretched state as shown, and in this embodiment, the thickness of the side portion along the longitudinal direction X of the wide portion 61 .
  • the thickness of the first core 6 is uniform except for the recesses 64, which will be described later. It is the thickness under a 2.0 kPa load other than 64.
  • the ratio of "the thickness of one core 6 under a load of 2.0 kPa” is preferably 0.6 or more, more preferably 0.7 or more, and preferably 0.9 or less, more preferably 0 as the latter/former. .8 or less.
  • the thickness of the absorbent body 5 (laminated structure of the first core 6 and the second core 7) in a dry state (before liquid absorption) under a load of 2.0 kPa is determined from the viewpoint of the balance between the liquid absorption performance and the wearing feeling. , preferably 3 mm or more, more preferably 4 mm or more, and preferably 8 mm or less, more preferably 6 mm or less.
  • the thickness of the absorber (first core, second core) is measured by the following method.
  • a part to be measured (for example, the first core 6) is cut out from the object to be measured (for example, the absorber 5) to be used as a measurement sample, and the sample is placed on a horizontal surface without any wrinkles or bends. Then, the thickness of the measurement sample is measured under a load of 2.0 kPa.
  • a thickness gauge PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.), for example, is used to measure the thickness.
  • a circular or square plate an acrylic plate with a thickness of about 5 mm
  • the load was adjusted to 2.0 kPa. to measure the thickness.
  • arbitrary 10 points in the measurement sample are measured, and the average value of the thicknesses of those 10 points is calculated to be the thickness of the measurement sample.
  • the second core 7 has a pair of extensions 7E, 7E (Fig. 2 etc.), from the viewpoint of securing the capacity of the gap G and further ensuring the effect of preventing side leakage by the gap G, in the absorbent body 5 in a dry state (before liquid absorption)
  • the distance H (see FIG. 5) between the skin-facing surface of the extending portion 7E of the second core 7 and the skin-facing surface of the first core 6 is preferably 2.0 mm or more, more preferably 3.0 mm or more. be.
  • the "skin-facing surface of the first core 6" referred to here is, more specifically, a side portion of the first core 6 along the longitudinal direction X ( Preferably, it is the skin facing surface within 10 mm from the side edge along the longitudinal direction X of the first core 6).
  • the upper limit of the separation distance H in the absorbent body 5 in a dry state is not particularly limited, but from the viewpoint of suppressing the thickness of the absorbent body 5 and improving the wearing feeling of the diaper 1, etc., it is preferably 6.0 mm or less. , more preferably 5.0 mm or less. Since the second core 7 of the diaper 1 is a so-called sheet-type absorbent body, the separation distance H is likely to fall within the above preferred range.
  • the sheet-type absorbent body is thinner than an absorbent body mainly composed of fiber aggregates, such as the first core 6, and is less likely to be crushed when compressed in the thickness direction.
  • the absorbent body is a sheet type, for example, when the absorbent body 5 (laminated structure of the first core 6 and the second core 7) is compressed in the thickness direction during manufacturing or wearing of the diaper 1, the second The sinking of the first core 6 into the crushed portion of the second core 7 caused by the crushing of the core 7 is easily suppressed.
  • the separation distance H from the facing surface tends to be 2.0 mm or more.
  • the absorbent body 5 in the saturated water absorption state is preferably 5 mm or more, more preferably 7 mm or more, and preferably It is 15 mm or less, more preferably 10 mm or less.
  • the "skin facing surface of the first core 6" here is as described above.
  • the above-mentioned "absorbent body in a saturated water absorption state” refers to a state in which the entire absorbent body is immersed in physiological saline at 25°C for 60 minutes, and then excess water that has not been absorbed from the absorbent body is removed.
  • This excess water can be removed, for example, by placing the absorber taken out of physiological saline on a liquid-permeable sheet such as a net with its absorbent surface (surface facing the skin) facing down, and placing a space below the absorber. can be carried out by standing still for 30 minutes. Since the second core 7 of the diaper 1 is a so-called sheet-type absorbent body, the separation distance H is likely to fall within the above preferred range. The reason is as described above.
  • the difference between the thickness of the second core 7 in a dry state (before liquid absorption) under a load of 0.05 kPa and the thickness of the second core 7 under a load of 7 kPa is preferably 0 when the former is subtracted from the latter. 0.5 mm or less, more preferably 0.3 mm or less, and ideally zero. As a result, the change in the thickness of the second core 7 during wearing of the diaper 1 is reduced, and thus the reduction in the separation distance H during wearing of the diaper 1 is suppressed. The effect of preventing side leakage due to is more reliably achieved.
  • under pressure of 0.05 kPa is the pressure applied to the absorbent body before wearing the absorbent article, and the pressure applied to the absorbent body when the wearer takes a standing posture while wearing the absorbent article. Both are assumed.
  • the "under pressure of 7 kPa” is a state in which the wearer of the absorbent article (for example, an infant) is supported by a third party (for example, the infant's mother) via a support such as a carrier or a bouncer. This assumes the pressure applied to the absorber. Since the second core 7 of the diaper 1 is a so-called sheet-type absorber, the difference in thickness between the two types of loads of the second core 7 tends to be zero or close to zero.
  • the first core 6 has recesses 64 having openings in at least one of the skin-facing surface and the non-skin-facing surface.
  • they are formed in a rectangular shape elongated in the vertical direction X, and are formed in pairs on both sides in the horizontal direction Y of the horizontal center line CLy of the diaper 1 .
  • the pair of recessed portions 64, 64 are respectively arranged at least in the crotch portion M, and further extend to portions near the crotch portion M of the ventral portion F and the back portion R, respectively.
  • the recess 64 is a through hole penetrating through the first core 6 in the thickness direction, as shown in FIG. have. Since the concave portion 64 is not formed in the second core 7, the absorber 5 (laminated structure of the first core 6 and the second core 7) has a longitudinal direction at a position corresponding to the concave portion 64 on the skin facing surface. A groove-like recess extending in X and having a bottom is formed.
  • Excrement such as urine easily enters the concave portion 64 compared to the portion of the first core 6 where the concave portion 64 is not formed. 7 is preferentially absorbed by the portion overlapping the concave portion 64 in a plan view.
  • the first core 6 is configured such that the concave portion 64 having excellent liquid uptake and liquid permeability is formed in a portion corresponding to the spaced portion 85 in the first core 6, that is, as shown in FIG. Since the cuff 8 (upright portion 82) does not overlap with the leak-proof cuff 8 (upright portion 82) in a plan view of the diaper 1 in the state, the second core 7 has a portion corresponding to the spaced portion 85 (central portion in the lateral direction Y).
  • the excrement is preferentially supplied to the upper part, and the arrival of the excrement is relatively slow on both sides of the part in the lateral direction Y (both sides along the longitudinal direction X of the second core 7). Therefore, in the diaper 1 of the present embodiment, it is easy to secure the capacity of the gap G formed at the position overlapping both side portions of the second core 7 along the longitudinal direction X in a plan view, and the side leakage prevention effect due to the gap G is further enhanced. can be played with certainty.
  • the recessed portion 64 is formed in the crotch portion M as in the present embodiment.
  • the length (width) of the recess 64 in the horizontal direction Y is preferably 3 mm or more, more preferably 8 mm or more, and preferably 25 mm or less, more preferably 15 mm or less.
  • the length of the recess 64 in the longitudinal direction X is preferably 30% or more, more preferably 40% or more, and preferably 70% or less, more preferably 60% of the total length of the first core 6 in the longitudinal direction X. % or less.
  • the concave portion 64 is formed by not depositing the forming material (water absorbing material) of the first core 6 on the formation planned portion of the concave portion 64, or by reducing the deposition amount of the forming material on the formation planned portion. It can be formed by using a smaller amount than the part.
  • As another method for forming the recesses 64 there is a method of manufacturing a precursor of the first core 6 in which the deposition amount of the forming material is uniform, and applying compression processing such as embossing to the portions of the precursor where the recesses 64 are to be formed. mentioned.
  • the recessed portion 64 formed by such pressing has a higher density and higher rigidity than the peripheral portion of the recessed portion 64 in the first core 6 .
  • FIG. 7 to 10 show other embodiments (diapers 1A, 1B, 1C) of the absorbent article of the present invention.
  • the configuration different from that of the diaper 1 described above will be mainly described, and the configuration similar to that of the diaper 1 will be given the same reference numerals and description thereof will be omitted.
  • the description of the diaper 1 is appropriately applied to configurations that are not particularly described in other embodiments described later.
  • the leakage-preventing cuff 8 and the first core 6 overlap in the ventral region Fr in a plan view of the diaper 1 in the unfolded and maximum stretched state (see FIG. 2).
  • the leak-proof cuff 8 and the first core 6 overlap in the dorsal region Rr.
  • the first core 6 of the diaper 1A has a narrow portion 62 at the ventral end in the longitudinal direction X and a wide portion 61 at the dorsal end in the longitudinal direction X. It's becoming In the diaper 1A, the first core 6 is biased toward the dorsal portion R side. The same effects as those of the diaper 1 are exhibited by the diaper 1A.
  • the leak-proof cuff 8 and the first core 6 overlap in both the ventral region Fr and the dorsal region Rr.
  • the first core 6 of the diaper 1B has wide portions 61 at both ends (abdominal end and dorsal end) in the longitudinal direction X, and has a narrow portion 62 at the central portion in the longitudinal direction X.
  • a width changing portion 63 is positioned between each of the pair of front and rear wide portions 61 , 61 and the narrow portion 62 .
  • the upright portions 82 of the leak-proof cuff 8 in the laid down state are formed at both ends in the longitudinal direction X, that is, at the overlapping portions with the second cores 7 (extending portions 7E) of the crotch portion M (described in (ii) above). 4, are supported from below by the laminated structure of the first core 6 and the second core 7, so that the upright position in the fallen state is supported. Only one end portion of the portion 82 in the longitudinal direction X (the portion located outward in the longitudinal direction X from the overlapping portion of the crotch portion M with the second core 7 in the ventral region Fr or the dorsal region Rr) is supported from below.
  • the gap G is likely to be formed between the upright portion 82 in the fallen state and the extending portion 7E of the second core 7 in the characteristic portion (i) of the crotch portion M. Therefore, the diaper 1B can have an effect equal to or greater than that of the diapers 1 and 1A in terms of side leakage prevention.
  • the leakage-preventing cuff 8A is formed by folding outward in the lateral direction Y a portion of the cuff sheet 80 extending from the inner side to the outer side in the lateral direction Y (outward folding portion). It is different from the diaper 1 that does not have the outer folding portion 86 in that it has the 86 .
  • the anti-leakage cuff 8A is arranged at an intermediate position between the free end 82F and the fixed portion 83 separately from one or more cuff elastic members 81 arranged at or near the free end 82F of the standing portion 82.
  • the upright portion 82 of the leak-proof cuff 8A can be bent at the arrangement position of the cuff elastic member 81A in the upright state as shown in FIG.
  • the leak-proof cuff 8 ⁇ /b>A has a higher leak-proof performance than the leak-proof cuff 8 that does not have the outer folded part 86 because the outer folded part 86 is in contact with the wearer's body.
  • the diaper 1C is configured so that both side portions (extending portions 7E) of the second core 7 along the longitudinal direction X can stand up toward the wearer's skin during wear. It differs from the diaper 1 which is not so constructed.
  • extension portions 7E are provided on both side edges of the second core 7 along the longitudinal direction X or in the vicinity thereof (specifically, for example, a region within 10 mm from the side edges of the second core 7 along the longitudinal direction X).
  • An absorber elastic member 51 for erecting is arranged.
  • the absorber elastic member 51 is arranged between the second core 7 and the topsheet 3 so as to be stretchable in the longitudinal direction X.
  • At least the second core 7 and further the topsheet 3 are coated with an adhesive or the like. is fixed by known fixing means.
  • the absorber elastic member 51 is arranged at least in the crotch portion M, and may be one as shown in the drawing, or may be plural.
  • the diaper 1C since the absorbent elastic member 51 is fixed to the extending portion 7E of the second core 7 in a stretched state, the diaper 1C in its natural state is stretched as shown in FIG.
  • the portion 7E stands up toward the wearer's skin due to contraction of the absorbent elastic member 51 .
  • the second core 7 has a bottom portion sandwiched between the pair of extension portions 7E, 7E (the central portion of the second core 7 in the lateral direction Y), and extends obliquely from the bottom portion toward the wearer's skin. It has a tray shape with a pair of extending extensions 7E, 7E as sides.
  • the second core 7 deforms in the same manner as in the relaxed state when the diaper 1C is worn.
  • the outer folding type leak-proof cuff 8A having excellent leak-proof performance is provided, and furthermore, a part of the absorbent body 5 (extending portion 7E of the second core 7) touches the wearer's skin when worn. Since they stand facing each other, along with the effect of preventing side leakage due to the gap G, side leakage can be prevented more effectively.
  • the absorbent article of the present invention is not limited to a pants-type disposable diaper as in the above embodiment, but broadly includes articles used for absorbing bodily fluids (urine, menstrual blood, loose stools, sweat, etc.) excreted from the human body, Also included are unfoldable disposable diapers, sanitary napkins, sanitary shorts and the like having so-called fastening tapes.
  • bodily fluids urine, menstrual blood, loose stools, sweat, etc.
  • unfoldable disposable diapers sanitary napkins, sanitary shorts and the like having so-called fastening tapes.
  • the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments and can be modified as appropriate.
  • the planar shape of the first core 6 is not limited to the above embodiment, and may be appropriately set on condition that the predetermined effects of the present invention are exhibited.
  • the first core 6 may include only the wide portion 61 and the narrow portion 62 without the width changing portion 63 .
  • the exterior body 10 is formed separately into a ventral exterior body and a dorsal exterior body. It may be in the form of continuously extending across the side R. All the parts that only one embodiment has as described above can be used interchangeably as appropriate.
  • ⁇ 1> It has an abdominal portion arranged on the abdomen side of the wearer when worn, a dorsal portion arranged on the back side of the wearer, and a crotch portion located therebetween, and from the abdominal portion via the crotch portion an absorbent body having a longitudinal direction extending to the dorsal part and a transverse direction orthogonal to the longitudinal direction, and absorbing and retaining bodily fluids;
  • An absorbent article comprising a pair of leak-proof cuffs arranged over the dorsal portion,
  • the absorbent body has a laminated structure of a first core and a second core disposed farther from the wearer's skin than the first core, and the second core extends in the thickness direction of the absorbent body.
  • Each of the pair of leakage-preventing cuffs has, at least in the crotch portion, an upright portion that rises toward the wearer's skin when worn, and is a flat surface on the skin-facing side of the absorbent article in the unfolded and maximally stretched state.
  • one of the leak-preventing cuffs and the other of the leak-preventing cuffs are separated by a separation portion, An absorbent article that satisfies all of the following (i) to (iii) in a plan view of the absorbent article in an unfolded and maximally stretched state.
  • the abdominal region When one imaginary straight line that crosses the absorbent article in the lateral direction is drawn in the crotch part, the length of the portion overlapping the spaced part on the imaginary straight line is It has a longer portion than the length of the portion overlapping with the first core. (ii) The crotch portion has an overlapping portion between the upright portion and the second core. (iii) With reference to an imaginary straight line extending in the lateral direction that bisects the absorbent article in the unfolded and maximally stretched state in the longitudinal direction, a region near the abdominal portion of the absorbent article is referred to as the abdominal region.
  • ⁇ 5> The absorbent article according to any one of ⁇ 1> to ⁇ 4>, wherein the first core contains a water absorbent polymer.
  • the content of the water-absorbent polymer in the first core is preferably 45% by mass or more, more preferably 55% by mass or more, and more preferably 75% by mass or less, more preferably with respect to the total mass of the first core. is 65% by mass or less, the absorbent article according to ⁇ 5>.
  • ⁇ 7> The absorbent article according to ⁇ 5> or ⁇ 6>, wherein the first core has a larger basis weight of the water-absorbent polymer than the second core.
  • the ratio of the basis weight of the water-absorbent polymer in the first core to the basis weight of the water-absorbent polymer in the second core is preferably 1.4 or more, more preferably 1.7 or more, as the former/latter, and preferably 3.0 or less, more preferably 2.5 or less,
  • the basis weight of the water-absorbent polymer in the first core is preferably 140 g/m 2 or more, more preferably 180 g/m 2 or more, and preferably 350 g/m 2 or less, more preferably 280 g/m 2 or less.
  • the basis weight of the water-absorbing polymer in the second core is preferably 50 g/m 2 or more, more preferably 90 g/m 2 or more, and preferably 150 g/m 2 or less, more preferably 120 g/m 2 or less.
  • the absorbency under pressure at 2.0 kPa of the water-absorbing polymer contained in the first core is preferably 25 g/g or more, more preferably 28 g/g or more, and preferably 45 g/g or less, and more preferably is 35 g/g or less, the absorbent article according to any one of ⁇ 5> to ⁇ 8>.
  • the thickness of the first core in a dry state under a load of 2.0 kPa is preferably 2 mm or more, more preferably 3 mm or more, and preferably 7 mm or less, more preferably 5 mm or less.
  • the thickness of the absorbent body (laminated structure of the first core and the second core) in a dry state under a load of 2.0 kPa is preferably 3 mm or more, more preferably 4 mm or more, and preferably 8 mm or less, The absorbent article according to any one of ⁇ 1> to ⁇ 10> above, which is more preferably 6 mm or less.
  • the second core has a pair of extending portions extending outward in the horizontal direction from side edges along the vertical direction of the first core at least in the crotch portion;
  • the distance between the skin-facing surface of the extending portion of the second core and the skin-facing surface of the first core is preferably 2.0 mm or more, more preferably 3.0 mm or more. , and preferably 6.0 mm or less, more preferably 5.0 mm or less, the absorbent article according to any one of ⁇ 1> to ⁇ 11>.
  • the distance between the skin-facing surface of the extending portion of the second core and the skin-facing surface of the first core is preferably 5 mm or more, more preferably 7 mm or more, and
  • the difference between the thickness of the second core in a dry state under a load of 0.05 kPa and the thickness of the second core under a load of 7 kPa, when the former is subtracted from the latter, is preferably 0.5 mm or less, or more.
  • the lateral length (width) of the recess is preferably 3 mm or more, more preferably 8 mm or more, and preferably 25 mm or less, more preferably 15 mm or less,
  • the length of the recess in the vertical direction is preferably 30% or more, more preferably 40% or more, and preferably 70% or less, more preferably 60%, of the total length of the first core in the vertical direction. % or less, the absorbent article according to ⁇ 15>.
  • the leak-preventing cuff includes a cuff sheet that forms the main body of the leak-preventing cuff, and a portion of the cuff sheet that extends outward in the lateral direction is folded outward in the lateral direction.
  • ⁇ 18> The absorbent article according to any one of ⁇ 1> to ⁇ 17>, wherein the first core includes a fiber assembly of a fibrous water absorbent material.
  • the base sheet is a liquid-permeable sheet,
  • the first core has a wide portion having a relatively long lateral length (width) and a relatively long lateral length (width). a relatively short narrow portion, and a width change in which the length (width) in the horizontal direction gradually increases from the inner side to the outer side in the vertical direction, the narrow portion being positioned between the wide portion and the narrow portion.
  • the absorbent article according to any one of ⁇ 1> to ⁇ 20> above, which is the region where the first core is not arranged.
  • the absorbent article of the present invention has excellent side leakage prevention performance, and side leakage is less likely to occur even when the wearer is in a sitting position.

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  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'article absorbant (1) de l'invention satisfait l'ensemble des conditions (i) à (iii) selon une vue en plan dans un état de déploiement et d'allongement maximal. (i) L'objet de l'invention possède, au niveau d'une partie entrejambe (M), une portion dans laquelle la longueur d'une portion de chevauchement d'une partie écartement (85) d'une paire de revers anti-fuite (8, 8) sur une droite virtuelle, lorsqu'une droite virtuelle traversant l'article absorbant (1) en direction latérale (Y) est tracée, est supérieure à la longueur d'une portion de chevauchement d'un premier noyau (6) sur la droite virtuelle (selon un mode de réalisation, cette portion correspond à une portion se trouvant en une position identique à une partie étroite (62) du premier noyau (6) en direction longitudinale (X)). (ii) Une partie superposition de parties relevées (82) des revers anti-fuite (8) et d'un second noyau (7), est présente au niveau de la partie entrejambe (M). (iii) Les revers anti-fuite (8) et le premier noyau (6) se superposent en une position extérieure en direction longitudinale (X) par rapport à ladite partie superposition de ladite condition (ii), dans une région côté ventre (Fr) et/ou une région côté dos (Rr).
PCT/JP2022/024242 2021-06-23 2022-06-17 Article absorbant WO2022270417A1 (fr)

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JP2021-104487 2021-06-23
JP2021104487A JP2023003359A (ja) 2021-06-23 2021-06-23 吸収性物品

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WO2022270417A1 true WO2022270417A1 (fr) 2022-12-29

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JP (1) JP2023003359A (fr)
CN (1) CN117500466A (fr)
WO (1) WO2022270417A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017140251A (ja) * 2016-02-10 2017-08-17 大王製紙株式会社 パッドタイプ使い捨ておむつ
JP2017176861A (ja) * 2012-12-10 2017-10-05 ザ プロクター アンド ギャンブル カンパニー 高い吸収性材料含量を有する吸収性物品
JP2018068818A (ja) * 2016-11-01 2018-05-10 花王株式会社 パンツ型使い捨ておむつ
JP2019088465A (ja) * 2017-11-14 2019-06-13 株式会社リブドゥコーポレーション 吸収性積層体および吸収性物品

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017176861A (ja) * 2012-12-10 2017-10-05 ザ プロクター アンド ギャンブル カンパニー 高い吸収性材料含量を有する吸収性物品
JP2017140251A (ja) * 2016-02-10 2017-08-17 大王製紙株式会社 パッドタイプ使い捨ておむつ
JP2018068818A (ja) * 2016-11-01 2018-05-10 花王株式会社 パンツ型使い捨ておむつ
JP2019088465A (ja) * 2017-11-14 2019-06-13 株式会社リブドゥコーポレーション 吸収性積層体および吸収性物品

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JP2023003359A (ja) 2023-01-11
CN117500466A (zh) 2024-02-02

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