WO2013108865A1 - 吸液層、該吸液層を有する使い捨て着用物品、及び該吸液層の製造方法 - Google Patents

吸液層、該吸液層を有する使い捨て着用物品、及び該吸液層の製造方法 Download PDF

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Publication number
WO2013108865A1
WO2013108865A1 PCT/JP2013/050890 JP2013050890W WO2013108865A1 WO 2013108865 A1 WO2013108865 A1 WO 2013108865A1 JP 2013050890 W JP2013050890 W JP 2013050890W WO 2013108865 A1 WO2013108865 A1 WO 2013108865A1
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WIPO (PCT)
Prior art keywords
liquid
absorbing
polymer particles
absorbing layer
region
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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.)
Ceased
Application number
PCT/JP2013/050890
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English (en)
French (fr)
Japanese (ja)
Inventor
賢一 笹山
市川　誠
邦彦 桂川
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Unicharm Corp
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Unicharm Corp
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Publication date
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Publication of WO2013108865A1 publication Critical patent/WO2013108865A1/ja
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Ceased legal-status Critical Current

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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
    • A61F13/53—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
    • A61F13/5323—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 absorbent material located in discrete regions, e.g. pockets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
    • 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
    • A61F2013/530481—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 superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/53051—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 superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged

Definitions

  • the present invention is a disposable diaper, disposable toilet training pants, disposable incontinence pants, disposable sanitary pants, a liquid absorbent layer used for disposable wear articles such as an incontinence pad, a disposable wear article having the liquid absorbent layer, And a method for producing the liquid-absorbing layer.
  • Patent Document 1 discloses a relatively thin liquid-absorbing layer that does not include pulp fibers and includes highly water-absorbing polymer particles between two non-woven fiber sheets.
  • the wearing article disclosed in Patent Document 1 since the liquid absorption region that absorbs and retains body fluid is formed only from the highly water-absorbing polymer particles, it has a required water absorption force and is relatively thin for a feeling of wear. It can be said that it is excellent. Further, since the highly water-absorbing polymer particles are fixed to the opposing surface of the fiber non-woven sheet via an adhesive applied in a mesh shape, the highly water-absorbing polymer particles are securely held between the sheets, and the adhesive is entirely attached to the opposing surface. There is no possibility that the water absorption performance of the liquid absorption layer is deteriorated as compared with the case where it is applied to the liquid.
  • the diffusibility of the body fluid is lower than when the pulp fiber is included, and the superabsorbent polymer absorbs the body fluid.
  • body fluid may remain on the skin-facing surface of the liquid-absorbing layer for a while after excretion, causing side leakage of the body fluid, or causing the wearer to feel uncomfortable and causing skin irritation.
  • an object of the present invention is an improvement of the conventional technique, which is relatively thin and excellent in wearing feeling, and can absorb body fluid quickly, and a disposable wearing article having a liquid absorbing layer and a liquid absorbing layer
  • the present invention relates to a liquid absorbing layer used in the manufacturing method and a method for manufacturing the same.
  • the first invention of the present application is directed to a liquid absorption layer of a disposable wearing article having a vertical direction and a horizontal direction perpendicular thereto.
  • the liquid-absorbing layer according to the first invention is interposed between a liquid-permeable or hardly liquid-permeable first carrier sheet, a liquid-permeable second carrier sheet, and the first and second carrier sheets, and A liquid-absorbing region containing at least one liquid-absorbing material fixed to the inner surface of either one of the two carrier sheets, and the liquid-absorbing material includes highly water-absorbing polymer particles. It has a central concave portion located in the central portion in the lateral direction, and both side convex portions located on both sides in the lateral direction of the central concave portion, and the mass per unit area of the superabsorbent polymer particles of the convex portions on both sides is It is characterized by being higher than that of the central recess.
  • the second invention of the present application has a longitudinal direction and a lateral direction, a front waist region, a rear waist region, a crotch region located in the front and rear waist region, and an annular elastic waist panel located in the front and rear waist region, And a crotch panel connected to the elastic waist panel located at least in the crotch region.
  • the crotch panel has a liquid-absorbing layer containing a liquid-absorbing material, and the liquid-absorbing layer includes a liquid-permeable or hardly liquid-permeable first carrier sheet, and a liquid-permeable layer. And a liquid absorbing region that is interposed between the first and second carrier sheets and includes a liquid absorbing material that is fixed to the inner surface of at least one of the two carrier sheets.
  • the liquid absorption area includes a central concave portion located at a central portion in the lateral direction and both side convex portions located on both sides in the lateral direction of the central concave portion.
  • 3rd invention of this application is related with the manufacturing method of the liquid absorption layer of disposable wearing articles.
  • a method for producing a liquid absorption layer of a disposable wearing article the step of spraying superabsorbent polymer particles on one side of a first fiber web transported in the machine direction to form a spray zone, and the spraying A step of further dispersing the superabsorbent polymer particles excluding the central portion in the region, a step of applying a hot melt adhesive to the surface of the second fiber web facing the first fiber web, and the first fiber
  • the method includes a step of forming a composite web by pressing the second fiber web on the web and pressing the web, and a step of cutting the composite web into a certain size.
  • the liquid absorption layer since the liquid absorption layer has a central concave portion and both side convex portions located on both sides in the lateral direction, it is excreted on the liquid absorption layer.
  • the body fluid is temporarily stored in the central concave portion, and there is no risk of side leakage due to the convex portions on both sides.
  • the body fluid stored in the central recess is quickly absorbed by the superabsorbent polymer particles surrounding the body fluid, there is no possibility that the wearer may feel uncomfortable due to the body fluid staying on the liquid absorbing layer.
  • FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1.
  • FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 5. Schematic of the manufacturing apparatus of a liquid absorption layer.
  • FIG. 8A is an enlarged view of a region indicated by IXA in FIG. 8, and FIG.
  • FIG. 8B is a schematic cross-sectional view taken along line IXB in FIG. Sectional drawing similar to FIG. 6 in 2nd Embodiment.
  • FIG. 12 is a schematic cross-sectional view taken along line XII-XII in FIG. 11.
  • a disposable diaper 10 shown as an example of a disposable wearing article of the present invention includes a longitudinal direction Y, a transverse direction X orthogonal thereto, and a virtual longitudinal center that bisects the width dimension of the transverse direction X. It has a line PP and a virtual horizontal center line QQ that bisects the width dimension in the vertical direction Y.
  • the diaper 10 is symmetric with respect to the longitudinal virtual center line PP.
  • the diaper 10 has a front waist region 11, a rear waist region 12, a chassis 14 having a crotch region 13 positioned between the front and rear waist regions 11, 12, and a liquid absorption connected to at least a skin facing surface of the crotch region 13.
  • the chassis 14 includes a skin facing surface, a non-skin facing surface facing the skin, an annular elastic waist panel 16 extending in the direction around the waist, and a crotch panel 17 connected to the non-skin facing surface of the elastic waist panel 16.
  • the elastic waist panel 16 includes a front waist panel 18 that forms the front waist region 11 and a rear waist panel 19 that forms the rear waist region 12.
  • the front waist panel 18 intersects with the crotch panel 17 and extends in the lateral direction X.
  • the outer end edge 18b extends in the lateral direction X while being spaced apart from the inner end edge 18a in the longitudinal direction Y.
  • a laterally long rectangular shape is formed by both side edges 18c and 18d extending in the vertical direction X between the edges 18a and 18b.
  • the rear waist panel 19 is substantially the same shape and size as the front waist panel 18, intersects with the crotch panel 17, and has an inner end edge 19 a that extends in the horizontal direction X and is spaced apart from the inner end edge 19 a in the vertical direction Y.
  • the outer end edge 19b extending in the horizontal direction X and the side edges 19c, 19d extending in the vertical direction Y between the inner and outer end edges 19a, 19b are formed in a horizontally long rectangular shape.
  • Each of the side edges 18c, 18d of the front waist panel 18 and each of the side edges 19c, 19d of the rear waist panel 19 are overlapped with each other and connected by a side seam 20 extending intermittently in the longitudinal direction Y, thereby opening the waist opening. 21 and a pair of leg openings 22 are defined (see FIG. 1).
  • the side seam portion 20 is applied by a known joining means, for example, various heat welding means such as hot embossing / debossing and sonic processing.
  • the front waist panel 18 includes a first inner sheet 23 positioned on the skin facing surface side and a first outer sheet 24 positioned on the non-skin facing surface side.
  • the first inner and outer surface sheets 23 and 24 are substantially liquid-impervious or hardly liquid-permeable SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, spunbond fiber nonwoven fabric having a mass of about 15 to 30 g / m 2 , It can be formed from a plastic sheet or a laminate sheet with at least one of these non-woven fabrics.
  • the inner surfaces of both sheets 23 and 24 are joined to each other by a hot melt adhesive or the heat welding means.
  • a plurality of thread-like, strand-like, or string-like elastic bodies 25 extending in the transverse direction X are disposed between the first inner and outer surface sheets 23 and 24 so as to extend in the transverse direction X.
  • the front waist panel 18 is elasticized so that it can contract at least in the lateral direction X by the elastic body 25 being disposed under extension in the lateral direction X.
  • the first inner and outer sheets 23 and 24 are hot melts applied to almost the entire peripheral surface of the elastic body 25 as long as the joined state of the sheets 23 and 24 is not likely to be peeled off during handling or wearing of the diaper 10. They may be joined to each other only via an adhesive.
  • the rear waist panel 19 has a second inner sheet 28 positioned on the skin facing surface side and a second outer sheet 29 positioned on the non-skin facing surface side.
  • the second inner and outer sheet 28, 29 is a substantially liquid-impervious or hardly liquid-permeable SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, spunbond fiber nonwoven fabric having a mass of about 15 to 30 g / m 2 , It can be formed from a plastic sheet or a laminate sheet with at least one of these non-woven fabrics.
  • the inner surfaces of both sheets 28 and 29 are joined to each other by a hot melt adhesive or the heat welding means.
  • a plurality of thread-like, strand-like or string-like elastic bodies 30 extending in the transverse direction X are disposed under the extension in the transverse direction X.
  • the rear waist panel 19 is elasticized so that it can contract at least in the lateral direction X by the elastic body 30 being disposed.
  • the two sheets 28 and 29 may be joined to each other only via a hot-melt adhesive applied to almost the entire circumferential surface of the elastic body 30.
  • the crotch panel 17 is a vertically long, substantially rectangular shape, and has a front end portion 33 connected to the non-skin facing surface (outer surface) of the front waist panel 18 and a rear end connected to the non-skin facing surface of the rear waist panel 19. A portion 34 and an intermediate portion 35 extending in the longitudinal direction Y between the front and rear end portions 33, 34.
  • the crotch panel 17 includes a base sheet 36 and a liquid absorbing structure 15 disposed on the skin facing surface (inner surface) of the base sheet 36.
  • the liquid absorbing structure 15 includes a liquid absorbing layer 37 and a body side liner 38 that is formed of a liquid permeable sheet and covers at least the skin facing surface side of the liquid absorbing layer 37.
  • the body side liner 38 is a non-woven sheet having a liquid permeability of a mass of about 15 to 35 g / m 2 , preferably having hydrophobic fibers hydrophilized, for example, a spunbond fiber non-woven fabric, a point bond fiber non-woven fabric and It can form from various well-known fiber nonwoven fabrics, such as an air through nonwoven fabric.
  • the diaper 10 of the present invention is composed of a chassis 14 in which the front and rear waist regions 11 and 12 and the crotch region 13 are not separate but are formed as a single body. It may be.
  • the liquid-absorbing structure 15 is interposed between the liquid-permeable top sheet that is located on the skin-facing surface and the liquid-impermeable back sheet that is located on the non-skin-facing surface that constitute the chassis 14. May be.
  • the disposable wearing article may be a body fluid absorbent article having a pad shape such as an incontinence pad.
  • the base sheet 36 has an inner / outer surface crotch sheet 39 formed of a substantially liquid-impervious or hardly liquid-permeable fiber nonwoven fabric sheet or a liquid-impervious and breathable plastic film, 40. Further, the inner surfaces of the inner and outer surface crotch sheets 39 and 40 are joined to each other via a hot melt adhesive (not shown), and the convex portions on both sides are bent inward to have a gasket function of extending in the vertical direction. A pair of elastic side flaps 41 is formed.
  • each elastic side flap 41 a plurality of thread-like, strand-like or string-like elastic bodies 43, 44 extending in the longitudinal direction Y are disposed under the extension in the longitudinal direction Y, and at least in the longitudinal direction Y. It is elasticized so that it can shrink.
  • the elastic body 43 extends straight in the longitudinal direction Y along the inner edge 41 a of the elastic side flap 41.
  • the elastic body 44 is curved toward the longitudinal virtual center line PP at the center of the crotch region, and extends in the direction around the wearer's leg when the diaper 10 is worn.
  • the elastic bodies 43 and 44 are fixed between the inner and outer surface crotch sheets 39 and 40 via a hot melt adhesive (not shown).
  • the elastic body 44 has a central portion convex toward the longitudinal virtual center line PP and is close to the other elastic body 43.
  • the contact pressure per unit area is increased as compared with the contact pressure per unit area in the vicinity of the front and rear waist panels 18 and 19 having a large interval therebetween.
  • the crotch panel 17 has a front joint region 45 and a rear joint region 46 located on the skin facing surfaces of the front end portion 33 and the rear end portion 34 in a state where each elastic side flap 41 is folded on the skin facing surface of the crotch panel 17.
  • the front and rear joining regions 45 and 46 can be formed from a hot melt adhesive, and have a concave portion opened toward the crotch region 13, and the hot melt adhesive is not applied to the opened concave portion.
  • a non-bonded area 47 is defined. Referring to FIG. 4, the front and rear end portions of the liquid absorbing structure 15 are fixed to the inner surface of the base sheet 36 via a joint portion 48 located on the outer surface thereof.
  • cover sheets 49 and 50 that cover the outer surfaces of the crotch panel 17 are attached to the front and rear end portions 33 and 34 of the crotch panel 17.
  • the cover sheets 49 and 50 can be formed of a fiber nonwoven fabric or a breathable plastic sheet having a mass of about 10 to 30 g / m 2 , and the front and rear waist panels 18 are in a state of intersecting with the front and rear end portions 33 and 34 of the crotch panel 17. , 19 are fixed to the non-skin facing surface via a hot melt adhesive (not shown).
  • the liquid absorption structure 15 includes a liquid absorption layer 27 having a relatively small thickness, and has a pad shape or a sheet shape. Specifically, the thickness of the portion of the crotch panel 17 where the liquid absorbing structure is disposed, for example, the central portion of the crotch panel 17 is about 5 mm or less.
  • the cantilever bending resistance is 15 to 140 mm.
  • the liquid absorbing structure 15 is relatively thin and has a high flexibility as a member that absorbs bodily fluids. Therefore, the liquid absorbing structure 15 easily adapts to the movement of the crotch panel 17, and the crotch panel 17 holds excrement. Even if the liquid is suspended downward, there is no possibility that the liquid absorbing structure 15 is separated from the crotch panel 17 and misplaced.
  • the front and rear end portions 33 and 34 of the crotch panel 17 are connected to the outer surfaces of the front and rear waist panels 18 and 19, so that the crotch panel 17 has a hammock shape that is suspended by them. Since the liquid absorption structure 15 has a relatively thin pad shape, the diaper 10 forms a large-capacity waste storage space 52 as compared with other diapers of this type, and a relatively large amount of waste is stored. Can be held. Moreover, since the space part 53 is formed when the non-joining area
  • the liquid absorbing layer 37 includes a front end edge 57 extending in the lateral direction X on the front waist region 11 side, a rear end edge 58 extending in the lateral direction X on the rear waist region 12 side, front and rear end portions 57, 58 and both side edges 59 extending in the longitudinal direction Y.
  • the liquid absorbing layer 37 is composed of a liquid absorbing material containing discrete so-called highly water-absorbing polymer particles 60 that are insoluble in water and have a water absorbing capacity of 10 times or more of the self-mass, and a mass of about
  • a first carrier sheet 61 formed of 8.0 to 15.0 g / m 2 , preferably 11.0 g / m 2 of a liquid-permeable or hardly liquid-permeable SMS fiber nonwoven fabric;
  • a second carrier sheet 62 formed from a liquid-permeable fibrous nonwoven fabric having a mass of about 8.0 to 15.0 g / m 2 , preferably about 10.0 g / m 2 .
  • the liquid absorbing layer 37 has a longitudinal direction in which discrete superabsorbent polymer particles 60 having a mass of about 30 to 300 g / m 2 , preferably about 40 to 280 g / m 2 are arranged.
  • the highly water-absorbing polymer particles 60 are fixed in the liquid absorption region 63 via a joint portion 66 located on the inner surface of the first carrier sheet 61.
  • the joint 66 can be formed from a hot melt adhesive applied continuously or intermittently.
  • the first carrier sheet 61 and the second carrier sheet 62 are sealed to each other by the joint portion 66.
  • the liquid absorption area 63 is divided into eight areas, but the area and the number of areas can be appropriately changed according to the absorption performance required by the liquid absorption structure 15, for example, eight or more. Or may be formed from only one area extending over the entire liquid absorbing structure 15.
  • the liquid-absorbing material of the liquid-absorbing layer 37 includes 70% by mass or more of the highly water-absorbing polymer particles 60, and is composed of a mixture in which the highly water-absorbing polymer particles 60 and the fluff pulp are mixed at substantially the same ratio. It is thinner overall. Further, since the first and second carrier sheets 61 and 62 are stably fixed in the seal region 64, the first and second carrier sheets 61 and 62 have a required peel strength, and the entire inner surfaces of the first and second carrier sheets 61 and 62 are fixed. It can be said that it has high flexibility compared with the case where it is.
  • the liquid-absorbing material may include not only the highly water-absorbing polymer particles 60 but also a known material such as fluff pulp and optional thermoplastic staple fibers in a part thereof at a relatively low mixing rate. Specifically, when hydrophilic fibers such as fluff pulp are mixed, it is preferable that the fibers are mixed at a ratio of about 0 to 30% by mass with respect to the entire liquid-absorbing material. In order to adjust the absorption rate of the entire liquid-absorbing layer 37, for example, two types having different absorption rates can be used in combination with the highly water-absorbing polymer particles 60.
  • each liquid absorption area 63 is formed in the lateral direction X from a relatively thin central recess 70 and relatively thick both-side protrusions 71.
  • a single layer of the superabsorbent polymer particles 60 is fixed to the inner surfaces of the first and second carrier sheets 61 and 62 via the joint 66 so that the both side protrusions 71 are not in the center recess. 70.
  • a superabsorbent polymer particle 60 having a mass of about 10 to 100 g / m 2 is fixed to the central recess 70, and a superabsorbent polymer particle 60 having a mass of about 50 to 300 g / m 2 is fixed to the convex portions 71 on both sides.
  • the superabsorbent polymer particles 60 are arranged in the lateral direction X in a state of being fixed so as not to overlap each other by the joint 66, but as long as they do not move, a plurality of superabsorbent polymer particles 60 are arranged. May be laminated so as to substantially overlap each other.
  • the body fluid absorption rate is slower than when hydrophilic fibers such as fluff pulp are mixed in at least approximately the same ratio.
  • the body fluid may temporarily stay on the liquid absorbing structure 15 and cause side leakage.
  • the excreted body fluid stays temporarily on the central recess 70 of the liquid absorption layer 37, and the both side protrusions 71 serve as a barrier to prevent side leakage of the body fluid. In 71, the body fluid can be absorbed and held.
  • the absorption area is increased as compared with the case where the bodily fluid is absorbed only by the central concave portion 70, and the absorption speed of the bodily fluid can be increased.
  • the highly water-absorbing polymer particles 60 fixed to the first and second carrier sheets 61 and 62 via the joint 66 absorb the body fluid that has moved into the liquid absorption region 63.
  • the carrier sheets 61 and 62 may be unlocked from each other. In that case, some of the highly water-absorbing polymer particles move in the liquid-absorbing layer 37 and are distributed almost uniformly.
  • FIG. 7 is a schematic view of a manufacturing apparatus 80 for the pad-like liquid absorbing layer 37
  • FIG. 8 is a partially enlarged view of the manufacturing apparatus 80
  • FIG. 9A is an enlarged view of a region indicated by IXA in FIG. b) It is typical sectional drawing which follows the IXB line
  • MD machine direction
  • CD direction perpendicular thereto
  • the manufacturing apparatus 80 for the liquid absorbing layer 37 the first fiber web 81 to be the second carrier sheet 62 is fed from the feed roll 83a and conveyed in the machine direction MD through the support roll 82a.
  • the manufacturing apparatus 80 includes a rotary suction drum 84 that rotates counterclockwise, first and second spraying units 85 and 86, a press roll 87, a coater 88, and a cutter 89.
  • the second fiber web 103 to be the first carrier sheet 61 is fed by the feed roll 83b, conveyed through the tension roll 82b, and supplied onto the rotary suction drum 84.
  • the outer peripheral surface 93 of the rotary suction drum 84 is provided with a plurality of suction concave molds 94 substantially in the same state as the liquid absorption regions 63 arranged at regular intervals in the circumferential direction, and a partition wall 98 is provided between the suction concave molds 94. Is provided.
  • the first fiber web 81 is concave toward the axis of the rotary suction drum 84 along the shape of the suction concave mold 94.
  • the first spraying unit 85 includes a slope-shaped spraying guide 95 having a spraying port 95a.
  • the spraying guide 95 receives a required amount of superabsorbent polymer particles 60 from a supply device (not shown) via a transfer pipe. Have been supplied.
  • a shutter (not shown) is provided at the spray port 95a of the spray guide 95, and a predetermined amount of superabsorbent polymer particles are sprayed onto the first fiber web 81 with the shutter opened.
  • the second spraying unit 86 includes a slope-shaped spraying guide 99 having a spraying port, and the spraying guide 99 is supplied with a required amount of highly dispersed superabsorbent polymer particles 60. (Not shown) is supplied via a transfer pipe.
  • a substantially triangular separation plate 100 is provided at the center of the spraying guide 99 on the spraying port 99a side, and the superabsorbent polymer particles 60 are distributed to both sides in the cross direction CD and sprayed in the first spraying unit 85.
  • the superabsorbent polymer particles 60 are dispersed.
  • the distribution region 96 of the superabsorbent polymer particles 60 deposited on the suction concave mold 94 of the rotary suction drum 84 is further distributed in the second spraying unit 86 onto the superabsorbent polymer particles 60 sprayed in the first spraying unit 85.
  • the laminated part 101 formed by depositing the superabsorbent polymer particles 60 formed, and the single layer part 102 located between the laminated parts 101 are included.
  • the brush means 97 is provided on the downstream side of the second spraying unit 86.
  • the brush means 97 has a brush 97a extending in the cross direction CD, and the brush 97a is in contact with the end of the spacing portion 98 located between the suction concave molds 94 of the rotating suction drum 84 of the first fiber web 81 or slightly.
  • the superabsorbent polymer particles 60 located at the end portions can be dropped onto the suction concave mold 94. Thereby, after passing through the rotary suction drum 84, a region where the superabsorbent polymer particles 60 do not exist is formed between the spray regions 96, and the spray region 96 is intermittently formed in the machine direction MD on the first fiber web 81. To position.
  • the superabsorbent polymer particles 60 are sprayed on the first fiber web 81 at regular intervals only by controlling the opening and closing timing of the shutters of the first and second spraying units 85 and 86. It is also possible to define a plurality of spraying areas 96, but when the brush means 97 is used, the spraying areas 96 can be more reliably arranged at regular intervals.
  • the first fiber web 81 merges with the second fiber web 103 to be the first carrier sheet 61 after passing through the second spreading unit 86, and on the circumferential surface of the rotary suction drum 84.
  • the press rolls 87 are pressed against each other.
  • a hot melt adhesive 107 is applied to the surface of the second fiber web 103 by a coater 88, and the first fiber web 81 and the second fiber web 103 are joined to each other via the hot melt adhesive 107.
  • a composite web 108 is formed.
  • the composite web 108 is conveyed in the machine direction MD via a tension roll 82c and a support roll 82d, and is cut by a cut roll 109 and an anvil roll 110 disposed opposite thereto, thereby forming a plurality of liquid absorbing layers 37. Is done.
  • two types of superabsorbent polymers can be obtained by spraying superabsorbent polymer particles 60 having different particle diameters, absorption speeds, and the like from the second spraying unit 86 from the first spraying unit 85.
  • a liquid-absorbing material in which the particles 60 are laminated can also be molded.
  • FIG. 10 is a cross-sectional view similar to FIG. 6 in the second embodiment of the present invention, and only differences from the first embodiment will be described below.
  • both the carrier sheets 61 and 62 are sealed to each other via a first joint portion 66 located on the inner surface of the first carrier sheet 61 and a second joint portion 111 located on the inner surface of the second carrier sheet 62.
  • the superabsorbent polymer particles 60 are fixed via the first and second joints.
  • the second joint portion 111 is formed by applying a hot melt adhesive in such a manner that body fluid passes through the second carrier sheet 62.
  • the first and second carrier sheets 61 and 62 are joined to each other via the first and second joint portions 66 and 111 in the seal region 64, thereby improving the joint strength thereof.
  • the highly water-absorbing polymer particles 60 can be more stably fixed between the carrier sheets 61 and 62 in the liquid absorption region 63.
  • a hot melt adhesive is applied to one surface of the first fiber web 81 on the upstream side of the first spraying unit 85.
  • a second coater 111 can be formed by providing a coater.
  • the brush means 97 is not provided, and the timing of opening and closing the shutter of the first spraying unit 85 and the rotary suction drum 84 are provided. It is preferable to form the dispersion pattern of the superabsorbent polymer particles 60 only with the suction concave mold 94.
  • the absorbent structure 15 extends in the longitudinal direction Y on the liquid absorbent structure 15.
  • a substantially rectangular absorbent pad 114 which is bulky compared to the above is disposed.
  • the absorbent pad 114 has a width dimension and a length dimension slightly smaller than those of the liquid absorbing layer 37, and is formed by mixing highly water-absorbing polymer particles and hydrophilic fibers such as fluff pulp.
  • a wrap sheet 116 formed from various known fiber nonwoven fabrics or porous plastic sheets covering the same.
  • the absorbent pad 114 has a convex portion 117 that protrudes toward the liquid absorbing layer 37 in the vicinity of the central portion of the surface facing the liquid absorbing layer 37, and the convex portion 117 indirectly through the body side liner 38.
  • the liquid absorbing layer 37 is located on the central recess 70.
  • the skin-facing surface of the body side liner 38 where the central recess 70 is located is provided with mounting portions 118a, 118b, and 118c that are spaced apart by a given dimension in the longitudinal direction Y.
  • the mounting portions 118a, 118b, and 118c are provided.
  • the absorbent pad 114 is detachably secured to the liquid absorbing structure 15 via the stub.
  • the fastening portions 118a, 118b, and 118c are formed from a plurality of hooks of a mechanical fastener, and may be directly attached to the wrap sheet 116 when the wrap sheet 116 of the absorbent pad 114 is formed from a fiber nonwoven fabric. And you may attach through the to-be-attached part provided in the outer surface of the lap sheet
  • the absorbent pad 114 may be directly attached to the liquid absorption layer 37 via the attachment portions 118a, 118b, 118c located on the liquid absorption layer 37. .
  • the attachment parts 118 a, 118 b, and 118 c may be provided with only the central attachment part 118 a or the absorbent pad 114.
  • the front and rear end edges may extend in a series in the vertical direction Y, and may be further divided into three or more.
  • the absorbent pad 114 By disposing the absorbent pad 114 on the liquid absorbing layer 37, the body fluid absorption capacity of the liquid absorbing structure 15 can be increased, and more body fluid can be absorbed.
  • the absorbent pad 114 is detachably disposed on the liquid absorbing structure 15 so that the absorption performance can be improved and more body fluid can be absorbed.
  • a liquid absorption layer of a disposable wearing article having a longitudinal direction and a transverse direction perpendicular thereto, a liquid-permeable or hardly liquid-permeable first carrier sheet, a liquid-permeable second carrier sheet, and the first and second liquid-permeable layers
  • the liquid absorption area has a central recess located at a central portion in the lateral direction and both side convex portions located on both sides in the lateral direction of the central recess, and the high water absorption of the both side convex portions.
  • the liquid absorbing layer wherein the mass per unit area of the conductive polymer particles is higher than that of the central recess.
  • the first invention disclosed in the above paragraph 0050 can include at least the following embodiments.
  • (2) The liquid-absorbing material is formed of a mixture of the highly water-absorbing polymer particles and hydrophilic fibers, and the mixing ratio of the hydrophilic fibers is 30% or less.
  • the disclosure relating to the second invention described above can be summarized at least in the following matters. It has a longitudinal direction and a lateral direction, a front waist region, a rear waist region, a crotch region located between the front and rear waist regions, an annular elastic waist panel located in the front and rear waist regions, and at least the crotch region
  • a disposable wearing article comprising a crotch panel connected to the elastic waist panel located
  • the crotch panel includes a liquid absorbing layer including a liquid absorbing material, The liquid-absorbing layer is interposed between the liquid-permeable or hardly liquid-permeable first carrier sheet, the liquid-permeable second carrier sheet, the first and second carrier sheets, and at least both of the carrier sheets.
  • a liquid absorbing region containing a liquid absorbing material fixed to the inner surface of any one of The liquid-absorbing material includes highly water-absorbing polymer particles,
  • the liquid-absorbing region has a central concave portion located at a central portion in the lateral direction, and both side convex portions located on both sides in the lateral direction of the central concave portion, and the superabsorbent polymer particles of the convex portions on both sides.
  • the disposable wearing article wherein the mass per unit area is higher than that of the central recess.
  • the second invention disclosed in the above paragraph 0052 can include at least the following embodiments. (1) It further has an absorptive pad, and the absorptive pad is detachably attached directly or indirectly on the skin facing surface of the liquid absorbing layer. (2) The absorbent pad has a protruding portion at a central portion in the lateral direction of the surface facing the liquid absorbing layer, and the protruding portion is located on the central concave portion. (3) The absorbent pad includes a liquid-absorbing material formed from a mixture of the superabsorbent polymer particles and the hydrophilic fibers, and has a thickness dimension larger than that of the liquid-absorbing layer.
  • a method for producing a liquid-absorbing layer of a disposable wearing article the step of spraying highly water-absorbing polymer particles on one side of a first fiber web transported in the machine direction to form a spray area, and the center in the spray area
  • Disposable wearing articles (disposable diapers) 37 Liquid-absorbing layer 60 Highly water-absorbing polymer particles 61 First carrier sheet 62 Second carrier sheet 63 Liquid-absorbing area 64 Sealing area 70 Central concave part 71 of liquid-absorbing layer Both side convex parts 81 of the liquid-absorbing layer First fiber web 85 First Spraying unit 86 Second spraying unit 87 Press roll 88 Coater 96 Dispersion area 103 2nd fiber web 114 Absorbent pad 115 Absorbent material MD Machine direction X Horizontal direction Y Vertical direction

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2013/050890 2012-01-20 2013-01-18 吸液層、該吸液層を有する使い捨て着用物品、及び該吸液層の製造方法 Ceased WO2013108865A1 (ja)

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JP2012010491A JP6038456B2 (ja) 2012-01-20 2012-01-20 吸液層を有する使い捨て着用物品
JP2012-010491 2012-01-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3272322A4 (en) * 2015-03-16 2018-09-05 Daio Paper Corporation Absorbent article
CN118476923A (zh) * 2024-05-07 2024-08-13 泉州市汉威机械制造有限公司 一种复合吸收芯成型装置及其成型方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL3261598T3 (pl) * 2015-02-26 2020-05-18 Dsg Technology Holdings Ltd. Chłonny rdzeń jednorazowego użytku i zawierający go zespół chłonny jednorazowego użytku oraz sposób jego wytwarzania
JP6431412B2 (ja) * 2015-03-11 2018-11-28 花王株式会社 吸収性物品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10118118A (ja) * 1996-10-23 1998-05-12 Kao Corp 吸収性物品
JPH11501854A (ja) * 1995-12-18 1999-02-16 ザ、プロクター、エンド、ギャンブル、カンパニー 分割された微粒子ゾーンを有する吸収構造の製造方法及び装置
JP2006014792A (ja) * 2004-06-30 2006-01-19 Daiichi Eizai Kk 吸収具
JP2011212289A (ja) * 2010-03-31 2011-10-27 Unicharm Corp 使い捨て着用物品

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231735U (enExample) * 1988-08-23 1990-02-28
US6673982B1 (en) * 1998-10-02 2004-01-06 Kimberly-Clark Worldwide, Inc. Absorbent article with center fill performance
US6660903B1 (en) * 1999-10-01 2003-12-09 Kimberly-Clark Worldwide, Inc. Center-fill absorbent article with a central rising member
JP5027364B2 (ja) * 2001-09-19 2012-09-19 ユニ・チャーム株式会社 使い捨ておむつ
JP2005096461A (ja) * 2004-08-30 2005-04-14 Daiki:Kk 吸収体及び該吸収体を使用するシーツ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11501854A (ja) * 1995-12-18 1999-02-16 ザ、プロクター、エンド、ギャンブル、カンパニー 分割された微粒子ゾーンを有する吸収構造の製造方法及び装置
JPH10118118A (ja) * 1996-10-23 1998-05-12 Kao Corp 吸収性物品
JP2006014792A (ja) * 2004-06-30 2006-01-19 Daiichi Eizai Kk 吸収具
JP2011212289A (ja) * 2010-03-31 2011-10-27 Unicharm Corp 使い捨て着用物品

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3272322A4 (en) * 2015-03-16 2018-09-05 Daio Paper Corporation Absorbent article
CN118476923A (zh) * 2024-05-07 2024-08-13 泉州市汉威机械制造有限公司 一种复合吸收芯成型装置及其成型方法

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JP2013146459A (ja) 2013-08-01

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