WO2018062388A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

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Publication number
WO2018062388A1
WO2018062388A1 PCT/JP2017/035220 JP2017035220W WO2018062388A1 WO 2018062388 A1 WO2018062388 A1 WO 2018062388A1 JP 2017035220 W JP2017035220 W JP 2017035220W WO 2018062388 A1 WO2018062388 A1 WO 2018062388A1
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WO
WIPO (PCT)
Prior art keywords
superabsorbent polymer
absorbent body
sheet
liquid
absorbent article
Prior art date
Application number
PCT/JP2017/035220
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English (en)
French (fr)
Japanese (ja)
Inventor
恵 葭葉
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大王製紙株式会社
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Filing date
Publication date
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Publication of WO2018062388A1 publication Critical patent/WO2018062388A1/ja

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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
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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 mainly relates to absorbent articles used in incontinence pads, sanitary napkins, cage sheets, medical pads, toiletries, disposable diapers, and the like, and has a laminated structure of a pile absorbent body and a polymer sheet.
  • the present invention relates to an absorbent article provided with an absorber.
  • an absorbent body is interposed between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet. It has been known.
  • the absorbent laminate has a first absorbent body and a second absorbent body from the top sheet side, and the first absorbent body includes a plurality of layers of sheet members between the sheet members. It has a water absorbent resin and is configured not to have pulp fibers, has an opening extending in the front-rear direction, the second absorbent body has a molded body containing a water absorbent resin and pulp fibers, and the molded body has Further, it is disclosed to use one having a groove or opening extending in the front-rear direction facing the opening of the first absorber.
  • the upper layer absorbent body located on the top sheet side and the lower layer absorbent body located on the back sheet side has an upper opening extending in the longitudinal direction
  • the lower layer absorber has a lower opening extending in the longitudinal direction
  • the upper opening and the lower opening are at least partially overlapped in the thickness direction
  • an absorbent article further comprising an SAP layer formed by disposing a plurality of superabsorbent polymers (SAP), wherein the SAP layer is formed on at least the left and right sides in the width direction of the lower opening.
  • a fiber assembly layer is disposed on the skin side of an absorbent body in which a superabsorbent polymer is disposed between an upper layer sheet and a lower layer sheet.
  • An absorbent article is disclosed in which the laminate is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet.
  • the absorbent article described in Patent Document 1 since the first absorbent body made of a polymer sheet is arranged on the top sheet side, the content ratio of the superabsorbent resin on the skin side becomes high, and the swollen water-absorbing polymer There is a possibility that so-called “gel blocking” in which the gap between particles is extremely lowered occurs, and a desired water absorption force cannot be expressed. As a result, the penetration of the body fluid is inhibited by the binding between the water-absorbing polymer particles, and a phenomenon in which the body fluid in which the penetration is inhibited reversely flows out again can be seen.
  • Patent Document 3 described in paragraph [0070] of the specification, it is described that a slit is provided in the center in the width direction of the fiber assembly layer along the longitudinal direction and penetrating the front and back. Since the surface sheet is disposed so as to cover the upper part of the slit, the surface of the absorbent article is formed flat, and there is a problem that the body fluid is difficult to flow in and the absorption speed is reduced. Further, when the superabsorbent polymer is not blended in the upper fiber assembly layer, the liquid holding power of the fiber assembly layer is small, and the absorbed body fluid may be separated and return.
  • a main problem of the present invention is to provide an absorbent article that ensures a sufficient amount of absorption while being thin, and quickly diffuses body fluids to increase absorption speed and suppress reversal.
  • an absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet,
  • the absorber is disposed adjacent to the non-skin side of the upper absorbent body composed of pulp and a superabsorbent polymer and the upper absorbent body, and the superabsorbent polymer is disposed between the two layers of sheets. It consists of a lower layer absorber, An opening extending in the longitudinal direction is formed in the upper-layer absorbent body, and a groove is formed on the skin contact surface side of the absorbent article so that the liquid-permeable surface sheet is recessed in the opening.
  • a featured absorbent article is provided.
  • an upper layer absorber made of pulp and a superabsorbent polymer, and a non-skin side of the upper layer absorber are disposed adjacent to each other, and a superabsorbent between the nonwoven fabric sheets.
  • positioned is used. Therefore, by providing the lower layer absorber made of a polymer sheet, a sufficient amount of absorption can be secured while being thin.
  • the superabsorbent polymer is also contained in the upper-layer absorbent body, the problem that the liquid is difficult to be retained when it is made of only pulp can be solved.
  • an opening extending in the longitudinal direction is formed in the upper absorbent body, and a groove is formed on the skin contact surface side of the absorbent article by recessing the liquid-permeable surface sheet into the opening. . Therefore, the upper layer absorbent can be quickly absorbed while diffusing body fluid in the longitudinal direction along the concave groove, and can be absorbed and retained by the superabsorbent polymer of the lower layer absorbent.
  • the upper layer absorbent body made of pulp and superabsorbent polymer is provided on the skin side of the lower layer absorbent body made of the polymer sheet, the body fluid absorbed and retained by the lower layer absorbent is separated and returns to the skin side. Is suppressed.
  • the absorbent article according to claim 1 wherein one groove is formed at the center in the width direction or a plurality of grooves are formed apart from each other in the width direction.
  • only one concave groove may be formed at the center in the width direction, or a plurality of grooves may be formed apart in the width direction.
  • the groove is arranged in a pattern arranged at least in the center in the width direction of the absorbent article, the body fluid can easily flow into the groove, and the diffusion of the body fluid along the groove is promoted. Therefore, it is preferable.
  • the lower layer absorbent body includes a plurality of superabsorbent polymers in which the non-woven fabric sheets are joined to each other by a joining portion and surrounded by the joining portion, and the superabsorbent polymer is enclosed therein.
  • the section between the adjacent superabsorbent polymer arrangement regions, which are partitioned into polymer arrangement regions, is a flow path portion that is relatively recessed from the superabsorbent polymer arrangement region.
  • the lower layer absorber is partitioned into a plurality of superabsorbent polymer arrangement regions, and a channel portion that is relatively recessed between adjacent superabsorbent polymer arrangement regions. Is used. As a result, the body fluid easily diffuses through the flow path portion, so that the reversal due to gel blocking can be prevented and the body fluid can be efficiently absorbed into the lower layer absorbent body.
  • the concave groove by forming a high pressure portion with a predetermined pattern on the bottom surface of the concave groove, the concave groove can be prevented from being crushed when subjected to leg pressure from both sides in the width direction during mounting. Body fluid can be quickly diffused in the longitudinal direction along the high-pressure portion.
  • FIG. 3 is a view taken along the line III-III in FIG. 1.
  • the upper-layer absorber 20 is shown, (A) is a plan view, and (B) is a view taken along the line BB of (A).
  • the lower layer absorber 22 is shown, (A) is a plan view, and (B) is a view taken along the line BB of (A). It is a cross-sectional view of the incontinence pad 1 at the time of liquid absorption. It is an enlarged plan view of the lower layer absorber 22 showing the flow of body fluid.
  • an incontinence pad 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet and the like, a liquid-permeable front sheet 3 that allows urine to permeate quickly, and the like.
  • the skin 4 in a predetermined section in the longitudinal direction so that the absorbent body 4 interposed between the two sheets 2 and 3 and the substantially lateral edge of the absorbent body 4 as a standing base end and at least the body fluid discharge site H are included.
  • the impervious edge is the impermeable portion.
  • the outer edges of the liquid back sheet 2 and the liquid permeable surface sheet 3 are joined by an adhesive such as hot melt or an adhesive means such as heat seal, and the side edges of the liquid back sheet 2 and the liquid permeable surface sheet 3 extend laterally from the absorbent body 4.
  • the liquid-impermeable back surface The Doo 2 and the side nonwoven fabric 7 are bonded by adhesive means such as adhesive or heat sealing, such as a hot melt. If necessary, a hydrophilic second sheet (not shown) can be disposed between the liquid-permeable surface sheet 3 and the absorber 4.
  • the liquid-impervious back sheet 2 is made of a sheet material having at least water-impervious properties such as polyethylene and polypropylene, but in addition to this, a non-woven sheet after securing a substantially liquid-impervious property through a waterproof film.
  • a liquid-impervious back sheet is composed of the waterproof film and the nonwoven fabric.
  • those having moisture permeability tend to be suitably used from the viewpoint of preventing stuffiness.
  • the water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction.
  • a sheet is preferably used.
  • the liquid-permeable surface sheet 3 is preferably a porous or non-porous nonwoven fabric or a porous plastic sheet.
  • the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton.
  • a nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.
  • Side nonwoven fabrics 7 and 7 are provided on both sides of the surface of the incontinence pad 1 along the longitudinal direction and over the entire length of the incontinence pad 1, and the outer portions of the side nonwoven fabrics 7 and 7 extend laterally.
  • the liquid-impermeable back sheet 2 is laterally extended, and the side nonwoven fabric 7 portion and the liquid-impermeable back sheet 2 portion that are extended to the side are formed by a hot melt adhesive or the like. Joined to form side flaps.
  • a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of important functions. For example, if importance is placed on functions such as preventing the penetration of urine, etc. or enhancing the feeling of touch, such as SSMS, SMS, and SMMS coated with a silicon-based, paraffin-based, alkylchromic chloride-based water repellent, etc.
  • a water-repellent non-woven fabric It is desirable to use a water-repellent non-woven fabric, and if importance is attached to the absorbability of body fluids, a method of polymerizing a compound having a hydrophilic group, such as an oxidation product of polyethylene glycol, in the synthetic fiber production process, Treating with metal salt such as stannic, partially dissolving the surface to make it porous and making the synthetic fiber swell or porous by applying a metal hydroxide, etc., applying capillary action to impart hydrophilicity It is desirable to use a hydrophilic treated nonwoven fabric. As this side nonwoven fabric 7, what was formed by a proper processing method using natural fiber, synthetic fiber, regenerated fiber, etc. as a raw material can be used.
  • a hydrophilic group such as an oxidation product of polyethylene glycol
  • the side nonwoven fabrics 7 and 7 are appropriately folded, and a pair of left and right inner solid gathers 10 and 10 that stand on the skin side with the position near the side edge of the absorbent body 4 as a standing base end, and the inner side relatively
  • a pair of left and right outer three-dimensional gathers 11 standing on the skin side formed by the liquid-impervious back sheet 2 and the side nonwoven fabric 7 that are located outside the three-dimensional gather 10 and extend laterally from the absorbent body 4, 11 is a three-dimensional gather BS having a double gather structure.
  • the three-dimensional gather BS may have a single gather structure including only the inner three-dimensional gather 10 or the outer three-dimensional gather 11, or a three-dimensional gather standing up on the skin side simply by disposing the side nonwoven fabric 7. You may make it not form.
  • the side nonwoven fabric 7 is folded back on both sides in the width direction toward the back side of the pad.
  • one or a plurality of double sheet portions 7a and 7b are formed on the outer side, and both ends or appropriate positions in the longitudinal direction are fixed inside the double sheet portion 7a on the inner side in the width direction.
  • One or a plurality of thread elastic elastic members 12 are arranged in the double sheet portion 7b on the outer side in the width direction, and two appropriate positions in the longitudinal direction are fixed.
  • the base end portion of the double sheet portion 7 b on the outer side in the width direction extending laterally from the absorbent body 4.
  • the inner solid gathers 10 standing on the skin side are formed by the double sheet portion 7a on the inner side in the width direction, and the skin is formed by the double sheet portion 7b on the outer side in the width direction.
  • An outer three-dimensional gather 11 standing on the side is formed. As shown in FIG.
  • the side nonwoven fabric 7 is not provided with the elastic elastic members 12 and 13 at both ends in the longitudinal direction of the pad, and the double sheet portion 7a on the inner side in the width direction is hot. It is joined to the absorber 4 side by a melt adhesive or the like.
  • the absorbent body 4 is disposed adjacent to the non-skin side of the upper layer absorbent body 20 made of absorbent fibers such as fluffy pulp and the superabsorbent polymer 21, and the upper layer absorbent body 20, and the skin side.
  • the planar shape is a substantially oblong shape that is long in the longitudinal direction of the pad.
  • the upper layer absorbent body 20 is a piled fiber absorbent body made of piled and superabsorbent polymer 21 by piled fiber. Thereby, the body fluid is quickly absorbed by the upper layer absorber 20 and the inside of the upper layer absorber 20 is easily diffused.
  • the superabsorbent polymer 21 is, for example, granular powder and is dispersed and mixed in the pulp constituting the upper layer absorbent body 20.
  • Examples of the pulp constituting the upper-layer absorbent body 20 include those made of cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate.
  • the fiber length is longer than that of hardwood pulp.
  • Softwood pulp is preferably used in terms of function and price.
  • the absorbent body 4 or the upper layer absorbent body 20 is surrounded by the encapsulating sheet, as a result, the encapsulating sheet is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4, A body fluid is quickly diffused by the encapsulating sheet having excellent absorbability, and reversion of urine and the like is prevented.
  • the basis weight of the pulp is 150 g / m 2 to 400 g / m 2 , preferably 160 g / m 2 to 280 g / m 2 .
  • Examples of the superabsorbent polymers 21 and 25 include polyacrylate crosslinked products, self-crosslinked polyacrylates, saponified products of crosslinked acrylate-vinyl acetate copolymers, and isobutylene / maleic anhydride copolymers.
  • Examples include cross-linked products, cross-linked polysulfonate salts, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred.
  • the water-absorbing polymer having the water-absorbing performance can be adjusted in water absorption (absorption capacity) and water absorption speed by adjusting the crosslinking density and the crosslinking density gradient in the production process.
  • the basis weight of the polymer is 30 g / m 2 to 300 g / m 2 , preferably 150 g / m 2 to 250 g / m 2 .
  • the upper absorbent body 20 always contains the superabsorbent polymer 21.
  • the liquid retention in the upper layer absorbent body 20 is lowered, the amount of reversion is increased, and the absorption speed is decreased, which is not preferable.
  • synthetic fibers may be mixed in the upper layer absorbent body 20.
  • synthetic fiber for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture.
  • a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can be used.
  • hydrophobic fiber it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.
  • the lower absorbent body 22 is a so-called polymer sheet or SAP sheet in which a superabsorbent polymer 21 is disposed between two layers of sheets, and the speed of liquid absorption is inferior to that of the upper absorbent body 20.
  • the liquid absorption amount has remarkably excellent properties.
  • a porous nonwoven fabric or a non-porous hydrophilic nonwoven fabric or a porous plastic sheet is used as the raw material fibers constituting the nonwoven fabric.
  • synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, cotton Natural fibers such as
  • the processing method of the said nonwoven fabric is not ask
  • the opening diameter of the porous plastic sheet is preferably smaller than the outer shape of the superabsorbent polymer 25 in order to prevent the superabsorbent polymer 25 from falling off.
  • the lower layer sheet 24 it is possible to use a sheet material having water shielding properties in addition to a perforated or non-porous nonwoven fabric or a porous plastic sheet.
  • the method of processing the nonwoven fabric is not limited. However, in order to prevent the superabsorbent polymer 25 from falling off, the fiber density of the obtained product such as the spunbond method, the melt blown method, and the needle punch method is large. It is preferable to use the processing method.
  • the opening diameter of the porous plastic sheet is preferably smaller than the outer shape of the superabsorbent polymer 25 in order to prevent the superabsorbent polymer 25 from falling off.
  • the water-impervious sheet material the same material as the liquid-impermeable back sheet 2 can be used.
  • an opening 26 extending in the longitudinal direction is formed in the upper layer absorbent body 20, and a concave formed by recessing the liquid-permeable surface sheet 3 into the opening 26 on the skin contact surface side of the incontinence pad 1.
  • a groove 27 is formed.
  • the opening 26 is a space portion penetrating the front and back of the upper layer absorbent body 20, and is provided in a region including the body fluid discharge portion H of the wearer.
  • one opening 26 is provided along the longitudinal direction at the center of the upper absorbent body 20 in the width direction.
  • the width C of the opening 26 is 10 to 30 mm, preferably 15 to 20 mm
  • the length D is 80 to 200 mm, preferably 100 to 150 mm.
  • one opening 26 is formed at the center in the width direction, but a plurality of openings 26 may be formed apart from each other in the width direction.
  • the body fluid discharged from the body fluid discharge portion is more likely to flow into the groove 27 when the pattern is formed with the opening 26 disposed in the center in the width direction. This is preferable because the flow of the water is promoted.
  • the opening 26 is provided only in the upper absorber 20 and is not provided in the lower absorber 22. For this reason, the liquid-permeable surface sheet 3 is joined to the upper layer sheet 23 of the lower layer absorbent body 22 at the bottom surface of the opening 26 in a state where the concave grooves 27 are formed.
  • the absorbent body 4 and the liquid-permeable surface sheet 3 are laminated, and the opening 26 is embossed by squeezing from the outer surface side of the liquid-permeable surface sheet 3.
  • the liquid surface sheet 3 is recessed in the opening 26.
  • the high pressure portion may be provided in a predetermined pattern on the bottom surface of the concave groove 27.
  • FIG. 1 shows, a wavy curve, a zigzag line, etc. which repeatedly reciprocate between the one side edge 27a and the other side edge 27b of the ditch
  • any material can be used as long as it has a structure in which the superabsorbent polymer 25 is disposed between the upper layer sheet 23 and the lower layer sheet 24, as shown in FIG.
  • the upper layer sheet 23 and the lower layer sheet 24 are joined by the joint portion 30, surrounded by the joint portion 30, and a plurality of superabsorbent polymer arrangement regions 31, 31 in which the superabsorbent polymer 25 is enclosed.
  • ... which is configured to be a flow path portion 32 in which the skin side surface is relatively recessed from the superabsorbent polymer arrangement region 31 between the superabsorbent polymer arrangement regions 31 and 31 adjacent to each other.
  • the flow path portion 32 has a lower protrusion height toward the skin than the superabsorbent polymer arrangement region 31 because the superabsorbent polymer 25 does not exist or is present at a lower basis weight than the superabsorbent polymer arrangement region 31.
  • the depressed portion is suppressed and formed continuously in the surface direction of the lower layer absorber 22.
  • the flow path portion 32 clearly forms a relatively depressed state because the superabsorbent polymer arrangement region 31 protrudes greatly toward the skin side.
  • the superabsorbent polymer arrangement region 31 bulges to the skin side by the superabsorbent polymer 25 in the superabsorbent polymer placement region 31, and the joint portion Since the flow path portion 32 is compressed to the non-skin side by 30, it is in a relatively depressed state.
  • the body fluid diffuses in the surface direction through the flow path portion 32 and is absorbed and held by the superabsorbent polymer 25 in the adjacent superabsorbent polymer arrangement region 31.
  • the superabsorbent polymer arrangement region 31 reliably absorbs and holds the body fluid.
  • the body fluid can easily flow between the upper layer absorbent body 20 and the lower layer absorbent body 22 through the flow path portion 32, and the diffusibility of the body fluid in the lower layer absorbent body 22 is improved. For this reason, even if gel blocking occurs in one superabsorbent polymer arrangement region 31, it diffuses through the flow path portion 32 and can be quickly absorbed by the other superabsorbent polymer arrangement region 31.
  • the basis weight of the superabsorbent polymer 25 in the superabsorbent polymer arrangement region 31 is 30 to 300 g / m 2 , preferably 150 to 250 g / m 2 .
  • gel blocking is unlikely to occur, the absorption performance of the superabsorbent polymer 25 is unlikely to deteriorate, and when the superabsorbent polymer 25 absorbs liquid and swells, the superabsorbent polymer arrangement region 31 protrudes to the skin side. The height becomes good, and the body fluid easily flows through the flow path portion 32 between the adjacent superabsorbent polymer arrangement regions 31 and 31.
  • the planar arrangement pattern of the superabsorbent polymer arrangement region 31 may be arranged in a regular lattice pattern so as to be aligned in the longitudinal direction and the width direction of the incontinence pad 1 as shown in FIG. They may be arranged in a staggered pattern.
  • the planar shape of the superabsorbent polymer arrangement region 31 may be a circle or a quadrangle, but it is preferable that the planar shape is a substantially elliptical shape that is long in the longitudinal direction of the incontinence pad 1 as shown in FIG.
  • the fluidity of the superabsorbent polymer 25 in the superabsorbent polymer arrangement region 31 is improved, and the absorption efficiency of body fluid can be improved while suppressing gel blocking.
  • the four places of the diagonal direction are the comparatively wide flow-path parts 32 enclosed by the superabsorbent polymer arrangement
  • the joint part 30 is a part joined by a hot melt adhesive, heat seal or ultrasonic seal.
  • the joint portion 30 is provided so as to surround the superabsorbent polymer arrangement region 31 and is provided in an intermittent pattern in which joint portions and non-joint portions are alternately arranged along the periphery of the superabsorbent polymer placement region 31. Is preferred.
  • the joint portion 30 is partly or wholly peeled off and communicates with the adjacent superabsorbent polymer arrangement region 31 or the channel portion 32. Is preferred. Thereby, the gel blocking in the super absorbent polymer arrangement
  • the lower layer absorber 22 includes the upper layer sheet 23 and the lower layer sheet 24 provided in a staggered arrangement. Are joined by a first joining portion 30a and second joining portions 30b, 30b provided at oblique intermediate positions connecting the first joining portions 30a, 30a, ... existing in the vertical and horizontal positions, and the first joining portion 30a.
  • a plurality of first defined regions surrounded by the first and second joint portions 30b and arranged in a regular lattice pattern along the longitudinal direction and the width direction of the incontinence pad 1 and having the superabsorbent polymer 25 enclosed therein (Superabsorbent polymer arrangement region 31) and a second defined region 33 which is located at the center of the four adjacent first defined regions and whose four oblique directions are surrounded by the second joint portion 30b.
  • the superabsorbent polymer 25 In the second defined region 33, a smaller amount of the superabsorbent polymer 25 than that in the first defined region (superabsorbent polymer arrangement region 31) is enclosed, or the superabsorbent polymer 25 is not interposed. It is considered as a polymer non-existence region.
  • the second defined area 33 is preferably formed with an area smaller than that of the first defined area (superabsorbent polymer arrangement area 31). As a result, the role of the second defining region 33 as the flow path portion 32 is clarified, and the fluidity of the body fluid is improved.
  • the first joint portions 30a arranged at the upper and lower ends of the first defined region (superabsorbent polymer placement region 31) are formed in a groove shape that is long in the left-right direction, and the first defined region (superabsorbent polymer)
  • the first joint portion 30a disposed at the left and right ends of the polymer placement region 31) is formed in a groove shape that is long in the vertical direction, and the second joint portion 30b is intermittent in the direction connecting the first joint portions 30a. It is preferable to form the dots.
  • the highly water-absorbing polymer 25 absorbs water and swells
  • the second joint portion 30b is easily peeled off, and the first defined region (superabsorbent polymer arrangement region 31) is changed to the second defined region 33.
  • the superabsorbent polymer 25 becomes easy to flow and gel blocking can be prevented.
  • the absorbent body 4 is composed of the upper layer absorbent body 20 made of pulp and the highly water-absorbing polymer 21 and the lower layer absorbent body 22 made of a polymer sheet, it is thin but is thin. A sufficient amount of absorption can be secured by the lower layer absorber 22. Moreover, since the superabsorbent polymer 21 is also contained in the upper layer absorbent body 20, it is possible to solve the problem that it is difficult to retain the liquid in the case of being made of only pulp.
  • an opening 26 extending in the longitudinal direction is formed in the upper-layer absorbent body 20, and the liquid-permeable surface sheet 3 is recessed in the opening 26 on the skin contact surface side of the incontinence pad 1. Since the grooves 27 are formed, body fluid can be quickly absorbed by the upper absorbent body 20 while diffusing in the longitudinal direction along the concave grooves 27 and then absorbed and held by the lower absorbent body 22. Moreover, since the upper layer absorbent body 20 is provided on the skin side of the lower layer absorbent body 22, it is suppressed that the bodily fluid absorbed and held by the lower layer absorbent body 22 returns to the skin side.
  • the incontinence pad 1 has been described as an example, but the present invention can be applied to other absorbent articles such as sanitary napkins and disposable diapers.

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JP2021045321A (ja) * 2019-09-18 2021-03-25 大王製紙株式会社 個装吸収性物品
JP7402147B2 (ja) * 2019-12-23 2023-12-20 花王株式会社 吸収体及びその製造方法
CN114786638B (zh) 2019-12-23 2023-04-18 花王株式会社 吸收体和吸收性物品
CN117357340A (zh) 2019-12-23 2024-01-09 花王株式会社 吸收性片和吸收性物品以及吸收性片的制造方法
CN115279317B (zh) * 2020-01-23 2023-08-11 花王株式会社 吸收性物品
JP2023001810A (ja) * 2021-06-21 2023-01-06 花王株式会社 吸収性物品
JPWO2023181483A1 (enrdf_load_stackoverflow) * 2022-03-25 2023-09-28

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