WO2021039543A1 - 吸収体及び吸収性物品 - Google Patents

吸収体及び吸収性物品 Download PDF

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Publication number
WO2021039543A1
WO2021039543A1 PCT/JP2020/031306 JP2020031306W WO2021039543A1 WO 2021039543 A1 WO2021039543 A1 WO 2021039543A1 JP 2020031306 W JP2020031306 W JP 2020031306W WO 2021039543 A1 WO2021039543 A1 WO 2021039543A1
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WIPO (PCT)
Prior art keywords
basis weight
absorber
antibacterial agent
lower layer
upper layer
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PCT/JP2020/031306
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English (en)
French (fr)
Japanese (ja)
Inventor
順 梶原
宏子 川口
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花王株式会社
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Priority to CN202090000820.XU priority Critical patent/CN216876825U/zh
Publication of WO2021039543A1 publication Critical patent/WO2021039543A1/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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—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

Definitions

  • the present invention relates to an absorber and an absorbent article.
  • Patent Document 1 describes an absorber in which a predetermined amount of an antibacterial agent is mixed and added to a binder that binds pulp and a super absorbent polymer.
  • the present invention relates to an absorber containing a water-absorbing polymer, an antibacterial agent, and a cellulose fiber.
  • the water-absorbent polymer and the antibacterial agent are preferably adhered to the cellulose fibers via a binder.
  • the present invention also relates to an absorbent article having a front surface sheet and a back surface sheet, and the absorber provided between the two sheets.
  • FIG. 1 is a diagram showing an embodiment of an absorber of the present invention, and is a cross-sectional view schematically showing a cross section of the absorber.
  • FIG. 2 is an enlarged schematic view showing an adhesive state of the water-absorbent polymer, the antibacterial agent, and the cellulose fiber shown in FIG.
  • FIG. 3 is a cross-sectional view schematically showing a cross section of another embodiment of the absorber of the present invention.
  • FIG. 4 is a cross-sectional view schematically showing a cross section of still another embodiment of the absorber of the present invention.
  • FIG. 5 is a cross-sectional view schematically showing a cross section of an absorbent core in still another embodiment of the absorber of the present invention.
  • FIG. 6 is an enlarged schematic view of the complex shown in FIG.
  • FIG. 7 is an enlarged schematic view of the complex in still another embodiment of the absorber of the present invention.
  • the body fluid absorbed by the absorber may return to the wearer's skin side, so-called liquid return.
  • the antibacterial agent is transferred to the absorbed body fluid, so that the body fluid containing the antibacterial agent adheres to the wearer's skin by the liquid return.
  • Body fluids containing antibacterial agents may cause stickiness, but if the content of the antibacterial agent in the absorber is reduced to prevent this, the antibacterial property of the absorber is lowered.
  • the absorber described in Patent Document 1 does not have both the suppression of stickiness due to the reconstituted body fluid and the antibacterial property of the absorber.
  • the present invention relates to an absorber that has both antibacterial properties of the absorber and suppression of stickiness due to the reconstituted body fluid, and an absorbent article provided with the same.
  • the absorber 1a of the present embodiment includes an absorbent core 4 and a core wrap sheet 6 that covers the outer surface of the absorbent core 4.
  • the absorbent core 4 is a mixed product of the water-absorbent polymer 3, the antibacterial agent 8 and the cellulose fiber 5
  • the core wrap sheet 6 is composed of the antibacterial agent 8 and the cellulose fiber (not shown).
  • the absorber 1a contains the water-absorbent polymer 3, the antibacterial agent 8, and the cellulose fiber 5.
  • the water-absorbent polymer 3 is a crosslinked product of various hydrogel materials, for example, a polymer or copolymer of an acrylic acid or an alkali metal salt of acrylic acid, a crosslinked product of polyacrylic acid and a salt thereof, a crosslinked product of a polyacrylate graft polymer, and starch.
  • a crosslinked product of carboxymethylated cellulose a crosslinked product of a hydrolysis product of a starch-acrylate graft copolymer, a crosslinked product of a vinyl alcohol-acrylate copolymer, a crosslinked product of maleic anhydride grafted polyvinyl alcohol, It is composed of a crosslinked isobutylene-maleic anhydride copolymer, a saponified product of a vinyl acetate-acrylic acid ester copolymer, and the like, and one of these components can be used alone or in combination of two or more.
  • the shape of the particles of the water-absorbent polymer 3 include a spherical shape, a lump shape, a bale shape, an amorphous shape, and the like.
  • antibacterial agent 8 those used for antibacterial applications in absorbent articles such as diapers can be used without particular limitation.
  • an antibacterial metal, an antibacterial metal carrier, an organic antibacterial agent and the like can be mentioned.
  • the metal having antibacterial activity include copper, silver, gold, lead, nickel, tin, zinc, iron, zirconium and the like.
  • the antibacterial metal carrier include silver zeolite, divinylbenzene-2-vinylpyridine-2-vinylpyridine silver copolymer (for example, those described in JP-A-2006-307404), and aluminum / silver / sodium silicate silicate.
  • a composite of silicon dioxide, zinc oxide, and aluminum oxide carrying silver or zinc specifically, a metal-substituted silicate-like mineral carrying an antibacterial metal.
  • the organic antibacterial agent include quaternary ammonium salts, specifically, cationic antibacterial agents such as benzalkonium cetyl phosphate, benzethonium chloride, benzalkonium chloride, and cetylpyridinium chloride.
  • the antibacterial agent 8 one of the above-mentioned components can be used alone or in combination of two or more.
  • the cellulosic fiber 5 examples include cellulosic natural fibers, regenerated fibers, and semi-synthetic fibers. Specific examples thereof include wood pulp fiber, rayon fiber, cotton fiber, cellulose acetate fiber and the like. Examples of the raw material pulp of the cellulose fiber include wood pulp such as coniferous kraft pulp and broadleaf kraft pulp; and non-wood pulp such as cotton pulp and straw pulp. Further, crosslinked cellulose fibers (pulp fibers) in which intramolecular or intermolecular crosslinks of cellulose are crosslinked with an appropriate crosslinking agent, or regenerated cellulose fibers such as rayon fibers having an improved degree of crystallinity of cellulose can also be used. As the cellulose fiber, one of the above-mentioned fibers can be used alone or in combination of two or more.
  • the absorber 1a may contain synthetic fibers, for example, thermoplastic fibers, as well as cellulose fibers.
  • thermoplastic fiber for example, a single fiber formed by using a single synthetic resin such as polyethylene, polypropylene, polyester, polyurethane, or a synthetic resin such as a composite of two or more kinds thereof was formed.
  • Composite fibers such as core-sheath type and side-by-side type formed by using two or more kinds of synthetic resins can also be used. From the viewpoint of ensuring the liquid absorbency of the absorber 1a more reliably, the content of the synthetic fiber in the absorbent core 4 is preferably 50% by mass or less.
  • the water-absorbent polymer 3 and the antibacterial agent 8 are adhered to the cellulose fibers 5 via the binder 7.
  • the binder 7 is arranged between the absorbent core 4 and the core wrap sheet 6, and the absorbent core 4 and the core wrap sheet 6 are joined via the binder 7. There is.
  • the water-absorbent polymer 3 and the antibacterial agent 8 contained in the absorbent core 4 pass through the binder 7 to the cellulose fibers 5 contained in the absorbent core 4 and the cellulose fibers 5 and the antibacterial agent 8. It adheres to the cellulose fibers contained in the core wrap sheet 6 (see FIG. 2).
  • the antibacterial agent 8 contained in the core wrap sheet 6 is adhered to the cellulose fibers 5 contained in the absorbent core 4 and the cellulose fibers contained in the core wrap sheet 6 via the binder 7. That is, in the plane direction of the interface, the water-absorbent polymer 3, the antibacterial agent 8, and the cellulose fiber 5 in each of the core wrap sheet 6 and the absorbent core 4 are adhered to the binder 7. Further, in the absorber 1a of the present embodiment, the binder 7 is not arranged on the inner side of the absorber 1a in the thickness direction Z.
  • Examples of the binder 7 include a water-soluble binder and a water-insoluble binder.
  • Examples of the water-soluble binder include an anionic binder, a cationic binder, and a nonionic binder.
  • Examples of the anionic binder include carboxymethyl cellulose salt, poly (meth) acrylic acid, poly (meth) acrylate (including partially neutralized product), and acrylamide-acrylic acid salt (including partially neutralized product) co-weight. Examples thereof include coalescence, maleic acid-acrylic acid salt (including partially neutralized product) copolymer, and polyamino acid salt (including partially neutralized product).
  • Examples of the cationic binder include cationized starch, cationized sodium carboxymethyl cellulose, cationized polyvinyl alcohol and the like.
  • Examples of the nonionic binder include polyvinyl alcohol, polyacrylamide, starch, polyethylene glycol, gum, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, polyvinylpyrrolidone and the like.
  • water-insoluble binder examples include those made of a hydrophobic thermoplastic resin, for example, styrene-ethylene-butylene-styrene (SEBS) type, styrene-isoprene-styrene (SIS) type, styrene-butylene-styrene ( Examples thereof include various hot melt adhesives such as SBS) type, styrene-ethylene-propylene-styrene type (SEPS), ethylene vinyl acetate (EVA), and polyvinyl alcohol (PVA).
  • SEBS styrene-ethylene-butylene-styrene
  • SIS styrene-isoprene-styrene
  • SBS hot melt adhesive
  • SEPS styrene-ethylene-propylene-styrene type
  • EVA ethylene vinyl acetate
  • PVA polyvinyl alcohol
  • the absorber 1a is used as a main liquid absorbing site in an absorbent article such as a diaper.
  • the antibacterial agent 8 is adhered to the cellulose fibers 5 via the binder 7 together with the water-absorbing polymer 3, so that the antibacterial agent 8 is attached to the absorber 1a after absorbing the liquid.
  • the antibacterial agent 8 is suppressed from being excessively eluted into the body fluid in the absorber 1a after absorbing the liquid. Therefore, according to the absorber 1a, it is possible to prevent stickiness due to the reconstituted body fluid without reducing the amount of the antibacterial agent.
  • the amount of the antibacterial agent is not reduced, the antibacterial property of the absorber 1a can be ensured. Furthermore, by suppressing stickiness, it is possible to maintain a good touch.
  • the antibacterial agent 8 is attached to the surface of the binder 7. In other words, at least a part of the antibacterial agent 8 is exposed from the binder 7. With such a configuration, the antibacterial property of the absorber 1a is further improved by the contact between the exposed portion of the antibacterial agent and the bacteria.
  • the absorber described in Patent Document 1 since the antibacterial agent mixed (internally added) in the binder is embedded in the binder, sufficient antibacterial properties are not exhibited. From the viewpoint of easily adhering the antibacterial agent 8 to the surface of the binder 7, it is preferable to externally add the antibacterial agent 8 to the binder 7 arranged on the absorber 7 by a method such as spraying or spraying.
  • the absorber 1a may have the antibacterial agent 8 embedded in the binder 7 together with the antibacterial agent 8 adhering to the surface of the binder 7. From the viewpoint of further improving the antibacterial property, it is preferable that the antibacterial agent 8 adhering to the surface of the binder 7 is present in a larger amount than the antibacterial agent 8 embedded in the binder 7.
  • the absorbent core 4 in the absorber of the present embodiment contains a water-absorbent polymer 3 and a fiber material.
  • the absorbent core 4 may contain cellulose fibers 5.
  • the absorbent core 4 does not have to contain cellulose fibers.
  • the content of the cellulose fibers in the absorbent core 4 is preferably 10% by mass or more and 90% by mass or less, and more preferably 20% by mass or more and 80% by mass. It is mass% or less.
  • a water-absorbent polymer having an antibacterial agent attached to one surface of the core wrap sheet may be sprayed.
  • the antibacterial agent-adhering water-absorbent polymer can be obtained, for example, by a method of adhering antibacterial fine particles described in JP-A-2016-104119 to a superabsorbent polymer.
  • the absorbent core 4 may be a mixed product of an antibacterial agent-adhering water-absorbent polymer and a fiber material.
  • the absorber 1a can be divided into three equal parts in the thickness direction Z, and the absorber 1a can be divided into an upper layer A, a lower layer C, and an intermediate layer B located between both layers (see FIG. 1).
  • the upper layer A is a layer arranged on the side closer to the skin in the absorbent article when the absorber 1a is incorporated into the absorbent article
  • the lower layer C is a layer arranged on the side farther from the skin in the absorbent article.
  • the absorber includes a core wrap sheet
  • the absorber is divided into three equal parts in the thickness direction, including the thickness of the core wrap sheet.
  • the upper layer A or the lower layer C is more water-absorbent than the intermediate layer B. It is preferable that the basis weight of the polymer is high, the upper layer A and the lower layer C more preferably have a higher basis weight of the water-absorbent polymer than the intermediate layer B, and the upper layer A is a water-absorbent polymer as compared with the lower layer C. It is more preferable that the basis weight is high.
  • Such an absorber can be obtained, for example, by appropriately changing the spraying amount of the water-absorbent polymer in the upper layer A, the intermediate layer B, and the lower layer C so that the water-absorbent polymer is unevenly distributed in the upper layer A.
  • the basis weight of the water-absorbent polymer in the upper layer A, the intermediate layer B and the lower layer C is preferably within the following range.
  • the basis weight of the water-absorbent polymer 3 in the upper layer A is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably, with respect to the basis weight of the water-absorbent polymer 3 in the lower layer C. Is 180% or less, preferably 105% or more and 200% or less, and more preferably 110% or more and 180% or less.
  • the basis weight of the water-absorbent polymer 3 in the lower layer C is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more than the basis weight of the water-absorbent polymer 3 in the intermediate layer B.
  • the basis weight of the water-absorbent polymer 3 in the upper layer A which is preferably 180% or less, preferably 105% or more and 200% or less, more preferably 110% or more and 180% or less, is the water absorption in the intermediate layer B and the lower layer C.
  • the polymer 3 On condition that it is higher than the basis weight of the polymer 3, it is preferably 10 g / m 2 or more, more preferably 60 g / m 2 or more, and preferably 150 g / m 2 or less, more preferably 120 g / m 2 or less. Yes, and more preferably 10 g / m 2 or more and 150 g / m 2 or less, and more preferably 60 g / m 2 or more and 120 g / m 2 or less.
  • the basis weight of the water-absorbent polymer 3 in the lower layer C is preferably higher than the basis weight of the water-absorbent polymer 3 in the intermediate layer B and lower than the basis weight of the water-absorbent polymer 3 in the upper layer A, preferably 10 g / g. m 2 or more, more preferably 55 g / m 2 or more, preferably 150 g / m 2 or less, more preferably 115 g / m 2 or less, and preferably 10 g / m 2 or more and 150 g / m 2 or less, more It is preferably 55 g / m 2 or more and 115 g / m 2 or less.
  • the basis weight of the water-absorbent polymer 3 in the intermediate layer B is preferably 10 g / m 2 or more, more preferably 50 g / m 2 or more, provided that the basis weight of the water-absorbent polymer 3 in the upper layer A and the lower layer C is lower than the basis weight of the water-absorbent polymer 3. It is preferably 150 g / m 2 or less, more preferably 110 g / m 2 or less, and preferably 10 g / m 2 or more and 150 g / m 2 or less, more preferably 50 g / m 2 or more and 110 g / m 2 or less. Is.
  • the upper layer A or the lower layer C is made of cellulose fibers as compared with the intermediate layer B. It is preferable that the basis weight is high, the upper layer A and the lower layer C more preferably have a higher basis weight of the cellulose fibers than the intermediate layer B, and the lower layer C has a higher basis weight of the cellulose fibers than the upper layer A. Higher is more preferred.
  • Such an absorber can be obtained, for example, by appropriately changing the content of the cellulose fibers in the upper layer A, the intermediate layer B and the lower layer C, or by incorporating the cellulose fibers in the core wrap sheet 6 that covers the surface of the absorbent core. can get.
  • the basis weight of the cellulose fibers in the upper layer A, the intermediate layer B and the lower layer C is preferably within the following range.
  • the basis weight of the cellulose fiber 5 in the lower layer C is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably 180, with respect to the basis weight of the cellulose fiber 5 in the upper layer A. % Or less, preferably 105% or more and 200% or less, and more preferably 110% or more and 180% or less.
  • the basis weight of the cellulose fiber 5 in the upper layer A is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably more than the basis weight of the cellulose fiber 5 in the intermediate layer B.
  • the basis weight of the cellulose fiber 5 in the lower layer C is preferably 10 g / m 2 or more, more preferably 60 g / m 2 or more, provided that it is higher than the basis weight of the cellulose fiber 5 in the intermediate layer B and the upper layer A. It is preferably 150 g / m 2 or less, more preferably 120 g / m 2 or less, and preferably 10 g / m 2 or more and 150 g / m 2 or less, more preferably 60 g / m 2 or more and 120 g / m 2 or less. ..
  • the basis weight of the cellulose fibers 5 in the upper layer A is preferably higher than the basis weight of the cellulose fibers 5 in the intermediate layer B and lower than the basis weight of the cellulose fibers 5 in the lower layer C, preferably 10 g / m 2 or more. , More preferably 55 g / m 2 or more, preferably 150 g / m 2 or less, more preferably 115 g / m 2 or less, and preferably 10 g / m 2 or more and 150 g / m 2 or less, more preferably 55 g. / M 2 or more and 115 g / m 2 or less.
  • the basis weight of the cellulose fiber 5 in the intermediate layer B is preferably 10 g / m 2 or more, more preferably 50 g / m 2 or more, provided that it is lower than the basis weight of the cellulose fiber 5 in the upper layer A and the lower layer C. It is preferably 150 g / m 2 or less, more preferably 110 g / m 2 or less, and preferably 10 g / m 2 or more and 150 g / m 2 or less, more preferably 50 g / m 2 or more and 110 g / m 2 or less. ..
  • the upper layer A or the lower layer C preferably has a higher basis weight of the antibacterial agent than the intermediate layer B, and the upper layer A
  • the lower layer C more preferably has a higher basis weight of the antibacterial agent than the intermediate layer B
  • the lower layer C further preferably has a higher basis weight of the antibacterial agent than the upper layer A.
  • the content of the antibacterial agent in the upper layer A, the intermediate layer B, and the lower layer C may be appropriately changed, or the basis weight may be taken into consideration at the interface between the absorbent core 4 and the core wrap sheet 6. Obtained by spraying an antibacterial agent.
  • the basis weight of the antibacterial agent in the upper layer A, the intermediate layer B and the lower layer C is preferably within the following range.
  • the basis weight of the antibacterial agent 8 in the lower layer C is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably 180, with respect to the basis weight of the antibacterial agent 8 in the upper layer A. % Or less, preferably 105% or more and 200% or less, and more preferably 110% or more and 180% or less.
  • the basis weight of the antibacterial agent 8 in the upper layer A is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably more than the basis weight of the antibacterial agent 8 in the intermediate layer B.
  • the basis weight of the antibacterial agent 8 in the lower layer C is preferably 0.00003 g / m 2 or more, more preferably 0.0001 g / m, provided that the basis weight of the antibacterial agent 8 in the intermediate layer B and the upper layer A is higher than the basis weight of the antibacterial agent 8.
  • the basis weight of the antibacterial agent 8 in the upper layer A is preferably higher than the basis weight of the antibacterial agent 8 in the intermediate layer B and lower than the basis weight of the antibacterial agent 8 in the lower layer C, preferably 0.00003 g / m.
  • the basis weight of the antibacterial agent 8 in the intermediate layer B is preferably 0.00003 g / m 2 or more, more preferably 0.00008 g / m, provided that the basis weight of the antibacterial agent 8 in the upper layer A and the lower layer C is lower than the basis weight of the antibacterial agent 8.
  • the upper layer A or the lower layer C preferably has a higher binder basis weight than the intermediate layer B, and the upper layer It is more preferable that A and the lower layer C have a higher binder basis weight than the intermediate layer B, and it is further preferable that the lower layer C has a higher binder basis weight than the upper layer A.
  • Such an absorber can be obtained, for example, by appropriately arranging a binder at the interface between the absorbent core 4 and the core wrap sheet 6 in consideration of the basis weight.
  • the basis weight of the binder in the upper layer A, the intermediate layer B and the lower layer C is preferably within the following range.
  • the basis weight of the binder 7 in the lower layer C is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably 180% or less, based on the basis weight of the binder 7 in the upper layer A. It is preferably 105% or more and 200% or less, and more preferably 110% or more and 180% or less.
  • the basis weight of the binder 7 in the upper layer A is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably 180%, based on the basis weight of the binder 7 in the intermediate layer B.
  • the basis weight of the binder 7 in the lower layer C is preferably 1 g / m 2 or more, more preferably 4 g / m 2 or more, provided that it is higher than the basis weight of the binder 7 in the intermediate layer B and the upper layer A. It is preferably 20 g / m 2 or less, more preferably 19 g / m 2 or less, and preferably 1 g / m 2 or more and 20 g / m 2 or less, more preferably 4 g / m 2 or more and 19 g / m 2 or less.
  • the basis weight of the binder 7 in the upper layer A is preferably higher than the basis weight of the binder 7 in the intermediate layer B and lower than the basis weight of the binder 7 in the lower layer C, preferably 1 g / m 2 or more, more preferably. Is 3 g / m 2 or more, preferably 20 g / m 2 or less, more preferably 18 g / m 2 or less, and preferably 1 g / m 2 or more and 20 g / m 2 or less, more preferably 3 g / m 2. More than 18 g / m 2 or less.
  • the basis weight of the binder 7 in the intermediate layer B is preferably 1 g / m 2 or more, more preferably 2 g / m 2 or more, It is preferably 20 g / m 2 or less, more preferably 17 g / m 2 or less, and preferably 1 g / m 2 or more and 20 g / m 2 or less, more preferably 2 g / m 2 or more and 17 g / m 2 or less.
  • Each basis weight of the water-absorbent polymer, the cellulose fiber, the antibacterial agent, and the binder is measured by the following method.
  • ⁇ Measuring method for each basis weight of water-absorbent polymer, cellulose fiber, antibacterial agent, and binder> The absorber is divided into three equal parts in the thickness direction, and the upper layer A, the intermediate layer B, and the lower layer C are cut out, respectively. After measuring the mass of each of these layers, the water-absorbent polymer and the fiber material of each layer are separated, and the masses of the water-absorbent polymer and the fiber material are further measured.
  • various methods capable of almost completely separating the water-absorbent polymer and the fiber material can be used without particular limitation.
  • the difference in particle size may be used for sieving with a fine mesh, and the difference in mass may be used to place the pulp under an air volume such that only the pulp is scattered, and the weight before and after the scattering is measured. May be good.
  • each layer is immersed in an ascorbic acid solution and exposed to sunlight to dissolve the water-absorbent polymer, the weight of the residual fiber after washing with water is obtained, and the mass of the residual fiber after washing with water is subtracted from the weight of the cut-out absorber. It may be calculated.
  • JIS L 1030-1 Part 1 Fiber Identification
  • JIS L 1030-2 The standard of (Part 2 Method for testing the mixing ratio of textile products) can be used as appropriate.
  • 300 mm 2 or more is cut out from an arbitrary place in a plan view, and this is used as a measurement sample. If the cut-out area at one location is less than 300 mm 2 , cut out measurement samples from multiple locations so that the total area is 300 mm 2 or more.
  • the measurement sample is subjected to a multi-step solvent extraction method from a non-polar solvent to a polar solvent to separate the antibacterial agent and the binder present in each layer to obtain a solution containing a single composition.
  • the obtained solution is dried and solidified, and 1H-NMR (nuclear magnetic resonance), IR (infrared spectroscopy), LC (liquid chromatography), GC (gas chromatography), MS (mass spectrometry), GPC (gel). Permeation chromatography), fluorescent X-rays, etc. are combined to identify the chemical structures of antibacterial agents and binders. Further, using an agent having a specified chemical structure as a standard substance, a calibration curve is prepared by a well-known analytical means such as GC and LC, and the antibacterial agent and the binder in the measurement sample are quantified. Based on this quantification result, the basis weight of the antibacterial agent or the binder is determined.
  • the basis weight of the antibacterial agent is determined based on the total mass of each antibacterial agent.
  • the basis weight of the binders is determined based on the total mass of each binder.
  • the antibacterial agent is preferably a component that exhibits a positive charge when ionized in water.
  • the fixation of the antibacterial agent can be improved by the interaction between the antibacterial agent and the water-absorbent polymer.
  • an antibacterial agent include the above-mentioned cationic antibacterial agent.
  • the binder 7 is preferably made of a hydrophobic thermoplastic resin from the viewpoint of improving the fixation of the antibacterial agent 8 in the absorber and further suppressing the antibacterial agent from returning together with the body fluid.
  • a hydrophobic thermoplastic resin include the hot melt adhesive described above.
  • the water-absorbent polymer 3 is preferably one that can absorb and retain 20 times or more, particularly 30 times or more of its own weight if the object is urine, and if it is blood, its own weight. It is preferable that the substance can absorb and retain 1 times or more, preferably 3 times or more of the above.
  • the upper limit of water absorption / retention in the water-absorbent polymer 3 is not particularly limited, but 1000 times its own weight can be used as a guideline for the upper limit.
  • the core wrap sheet 6 a liquid-permeable sheet conventionally used for an absorber in the technical field can be used without particular limitation.
  • the core wrap sheet 6 include paper such as tissue paper, fiber sheets such as non-woven fabrics (spunbonded non-woven fabrics, spunlaced non-woven fabrics such as acrylic and rayon), and perforated films.
  • the core wrap sheet 6 is preferably liquid-permeable and hydrophilic, and those containing hydrophilic fibers are preferably used.
  • the basis weight of the cellulose fibers may be different between those arranged in the upper layer A and those arranged in the lower layer C. From the viewpoint of further improving the diffusivity of the liquid, it is preferable that the core wrap sheet 6a arranged in the lower layer C has a higher basis weight of the cellulose fibers than the core wrap sheet 6b arranged in the upper layer A. From the same viewpoint as above, it is preferable that the basis weight of the cellulose fibers in the core wrap sheets 6a and 6b arranged in the upper layer A and the lower layer C is within the following range.
  • the core wrap sheet 6a arranged in the lower layer C is preferably 105% or more, more preferably 110% or more, and preferably 200% or less, more preferably more than the core wrap sheet 6b arranged in the upper layer A. Is 180% or less, preferably 105% or more and 200% or less, and more preferably 110% or more and 180% or less.
  • the basis weight of the cellulose fibers 5 in the core wrap sheet 6b arranged in the lower layer C is preferably 5 g / m 2 or more on condition that the basis weight of the cellulose fibers in the core wrap sheet 6a arranged in the upper layer A is higher than the basis weight of the cellulose fibers in the core wrap sheet 6a arranged in the upper layer A.
  • the basis weight of the cellulose fibers 5 in the core wrap sheet 6a arranged in the upper layer A is preferably 5 g / m 2 or more, more preferably 7 g / m 2 or more, and preferably 38 g / m 2 or less, more preferably. It is 28 g / m 2 or less, preferably 5 g / m 2 or more and 38 g / m 2 or less, and more preferably 7 g / m 2 or more and 28 g / m 2 or less.
  • the core wrap sheet 6 of the present embodiment contains cellulose fibers (not shown), but when the absorbent core 4 contains cellulose fibers, the core wrap sheet 6 does not have to contain cellulose fibers.
  • one surface of the core wrap sheet 6 is supported with the antibacterial agent 8 via a binder 7 applied to the surface and is bonded to the surface of the absorbent core 4.
  • the binder 7 is irregularly or regularly formed into a fiber net (that is, fibrous and mesh-like). It is preferable that it is applied.
  • the binder 7 is coated so as to generate a non-coated portion by using, for example, a spiral type, a summit type, an omega type, or a curtain type device.
  • a plurality of coating devices may be used or a device for spraying the binder in a mist form may be used depending on the desired coating width.
  • the coating amount (basis weight) of the binder 7 in the core wrap sheet 6 is preferably 1 g / m 2 or more and 20 g / m 2 or less, more preferably 2 g / m 2 or more and 18 g /. It is m 2 or less, more preferably 3 g / m 2 or more and 17 g / m 2 or less.
  • FIGS. 1 and 2 show other embodiments of the absorber of the present invention.
  • components different from those of the first embodiment shown in FIGS. 1 and 2 will be mainly described, and the same components will be designated by the same reference numerals and description thereof will be omitted.
  • the description of the first embodiment is appropriately applied to the components not particularly described.
  • the absorbent core 4 contains the water-absorbent polymer 3 and the cellulose fiber 5, but the absorbent body 1b of the second embodiment shown in FIG. 3 contains the core wrap sheets 6a and 6b and water-absorbing material. It is composed of a laminate in which the sex polymer 3 is laminated. That is, in the absorber 1b, the water-absorbent polymer 3 is arranged between the core wrap sheets 6a and 6b, and the water-absorbent polymer 3 constitutes the absorbent core 4.
  • the binder 7 is applied to one surface of the core wrap sheet 6, and the antibacterial agent 8 is sprayed on the binder 7.
  • the core wrap sheet 6 contains cellulose fibers (not shown) and an antibacterial agent 8.
  • the water-absorbent polymer 3 in the absorber 1b, the antibacterial agent 8 in the core wrap sheet 6, and the antibacterial agent 8 sprayed on the binder 7 adhere to the cellulose fibers in the core wrap sheet 6 in the planar direction via the binder 7. doing.
  • Such an absorber 1b can be produced, for example, by the following method. First, two core wrap sheets coated with the binder 7 on one surface are prepared, and the water-absorbent polymer 3 is sprayed on the surface of the one core wrap sheet coated with the binder 7.
  • the above-mentioned absorber can be obtained by superimposing the other core wrap sheet on the surface coated with the binder 7 so that the surface coated with the binder 7 and the water-absorbent polymer 3 face each other.
  • This absorber is a polymer sheet having a structure in which the water-absorbent polymer 3 is sandwiched between core wrap sheets.
  • the absorber of the present embodiment is a laminate of core wrap sheets 6a and 6b and a deposit of a water-absorbent polymer, or a laminate of core wrap sheets 6a and 6b and a mixed dry matter containing a water-absorbent polymer. You may.
  • the mixed dried product is obtained, for example, by drying a mixed solution containing a water-absorbent polymer and a water-soluble polymer.
  • the absorbent core 4 includes a mixed product fiber layer 41 and a water-absorbent polymer layer 43, and other than that, the absorbent body 1b of the second embodiment is used. It has a similar configuration.
  • the mixed product layer 41 is made of a mixed product of a water-absorbent polymer 3 and a fiber material.
  • the mixed product layer 41 contains cellulose fibers 5 as a fiber material.
  • the water-absorbent polymer layer 43 is composed of a deposit of the water-absorbent polymer 3.
  • the core wrap sheet 6 contains cellulose fibers (not shown) and an antibacterial agent 8.
  • the water-absorbent polymer 3 in the mixed triple product layer 41 of the present embodiment, the antibacterial agent 8 in the core wrap sheet 6, and the antibacterial agent 8 sprayed on the binder 7 are mixed product fibers in the plane direction via the binder 7. It is adhered to the cellulose fibers in the layer 41 and the core wrap sheet 6.
  • Such an absorber 1c can be obtained, for example, by laminating the above-mentioned mixed product fiber and a water-absorbent polymer between the core wrap sheets 6a and 6b.
  • the water-absorbent polymer layer 43 may be prepared by arranging a water-absorbent polymer, a deposit of the water-absorbent polymer, or the mixed dry matter described above on a core wrap sheet having a binder 7 coated on one surface. An antibacterial agent may be sprayed on the surface of the core wrap sheet coated with the binder 7.
  • the mixed product layer 41 is preferably arranged on the upper layer A side of the water-absorbent polymer layer 43 in the thickness direction Z of the absorber.
  • the binder 7 is arranged between the core wrap sheet 6 and the absorbent core 4, but the absorbent core may include the binder 7.
  • the absorbent core 4a of the fourth embodiment shown in FIGS. 5 and 6 contains a complex 10 in which a water-absorbent polymer 3, an antibacterial agent 8, and a cellulose fiber 5 are adhered via a binder.
  • the binder 7a of the complex 10a in the fourth embodiment is fibrous.
  • the bonding mode via the fibrous binder 7a is not particularly limited, and the water-absorbent polymer 3 and the antibacterial agent 8 to be bonded may be singular or plural.
  • the fibrous binder 7a is preferably a hydrophilic adhesive having a fibrous form, and examples thereof include polyvinyl alcohol and carboxymethyl cellulose.
  • the absorbent core 4a containing the composite 10a is obtained, for example, by mixing a fibrous binder 7a, a water-absorbent polymer 3 and an antibacterial agent 8 to obtain an adhesive in which the water-absorbent polymer 3 and the antibacterial agent 8 are adhered.
  • the adhesive and the cellulose fiber 5 Obtained by mixing and stacking the adhesive and the cellulose fiber 5.
  • it can be obtained by mixing and stacking a mixture of the fibrous binder 7a and the above-mentioned antibacterial agent-adhering water-absorbent polymer and the cellulose fiber 5.
  • the surface of the mixed product of the antibacterial agent-adhering water-absorbent polymer and the cellulose fiber may be sprayed with the fibrous binder 7a, and the mixed product may be coated with a core wrap sheet containing the cellulose fiber.
  • the mixed product fiber constitutes the absorbent core, and the complex 10a is formed at the interface between the absorbent core and the core wrap sheet.
  • the complex 10a in the fourth embodiment was formed by the fibrous binder 7a, but the binder forming the complex 10 does not have to be fibrous.
  • the composite 10b in the fifth embodiment a part of the surface of the water-absorbent polymer 3 is coated with the binder 7, and the water-absorbent polymer 3 and the antibacterial agent 8 adhere to the cellulose fiber 5 in the coating portion 31. (See Fig. 7).
  • a binder 7 is sprayed on a part of the surface of the water-absorbent polymer 3, and this is mixed with the antibacterial agent 8 to obtain the water-absorbent polymer 3 and the antibacterial agent 8. It is obtained by mixing and stacking the adhesive and the cellulose fiber 5 after obtaining an adhesive to which the adhesive is adhered.
  • the absorbent core in the fourth and fifth embodiments may contain the above-mentioned complex 10 together with the water-absorbent polymer 3 which does not form the complex, the antibacterial agent 8, and the cellulose fiber 5. That is, all the water-absorbent polymers 3, the antibacterial agent 8, and the cellulose fibers 5 in the absorbent core do not have to form the complex 10, and may form the complex 10.
  • the absorbers of the 4th and 5th embodiments may or may not be provided with a core wrap sheet.
  • the above-mentioned absorber can be preferably used as an absorber of an absorbent article.
  • Absorbable articles are mainly used for absorbing and retaining body fluids excreted from the body such as urine and menstrual blood.
  • Absorbent articles include, but are not limited to, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., and broadly include articles used for absorbing liquid discharged from the human body. To do.
  • the absorbent article typically comprises a front surface sheet and a back surface sheet, and comprises a liquid-retaining absorber interspersed between the two sheets.
  • the absorbent article may further include various members according to its specific use. Such members are known to those of skill in the art.
  • the core wrap sheet 6 is composed of two sheets and is arranged in the upper layer A and the lower layer C of the absorber, but the core wrap sheet is composed of one sheet. May be good.
  • the core wrap sheet 6 may be in a mode in which the entire outer surface of the absorbent core 4 is covered.
  • the entire outer surface of the absorbent core 4 is covered in a tubular shape by the core wrap sheet 6, and both ends of the tubular core wrap sheet 6 are opened. May be sealed by a joining means such as adhesion or crimping.
  • the core wrap sheet 6 and the absorbent core 4 face each other so as to be in direct contact with each other without any intervention between the core wrap sheet 6 and the absorbent core 4.
  • the core wrap sheet 6 and the absorbent core 4 may face each other with a sheet such as a non-woven fabric interposed between the core wrap sheet 6 and the absorbent core 4.
  • the present invention further discloses the following absorbers and absorbent articles comprising them.
  • ⁇ 2> The absorber according to ⁇ 1>, wherein the antibacterial agent is attached to the surface of the binder.
  • the antibacterial agent having the antibacterial agent embedded in the binder, and the antibacterial agent adhering to the surface of the binder is present in a larger amount than the antibacterial agent embedded in the binder, according to the above ⁇ 2>.
  • Absorber. ⁇ 4> The absorber is divided into three equal parts in the thickness direction, and the absorber is arranged in an absorbent article on the side closer to the skin, the lower layer arranged on the side farther from the skin, and between the upper layer and the lower layer.
  • the basis weight of the water-absorbent polymer in the upper layer is 105% or more and 200% or less, preferably 110% or more and 180% or less, based on the basis weight of the water-absorbent polymer in the lower layer, ⁇ 4> or ⁇ 5>.
  • the basis weight of the water-absorbent polymer in the lower layer is 105% or more and 200% or less, preferably 110% or more and 180% or less, based on the basis weight of the water-absorbent polymer in the intermediate layer, ⁇ 4> to ⁇ 6.
  • the basis weight of the water-absorbent polymer in the upper layer is 10 g / m 2 or more and 150 g / m 2 or less, preferably 60 g / m 2 or more and 120 g / m 2 or less, according to any one of ⁇ 4> to ⁇ 7>.
  • the absorber is divided into three equal parts in the thickness direction, and the absorber is arranged in an absorbent article on the side closer to the skin, the lower layer arranged on the side farther from the skin, and between the upper layer and the lower layer.
  • the basis weight of the cellulose fibers in the upper layer is 105% or more and 200% or less, preferably 110% or more and 180% or less with respect to the basis weight of the cellulose fibers in the intermediate layer, according to ⁇ 9> or ⁇ 10>.
  • the basis weight of the cellulose fibers in the lower layer is 105% or more and 200% or less, preferably 110% or more and 180% or less with respect to the basis weight of the cellulose fibers in the upper layer, any of the above ⁇ 9> to ⁇ 11>.
  • the absorber according to 1. ⁇ 13> The basis weight of the cellulose fiber in the lower layer is 10 g / m 2 or more and 150 g / m 2 or less, preferably 60 g / m 2 or more and 120 g / m 2 or less, according to any one of ⁇ 9> to ⁇ 12>.
  • Absorber is any one of ⁇ 9> to ⁇ 12>.
  • the absorber is divided into three equal parts in the thickness direction, and the absorber is arranged in an absorbent article on the side closer to the skin, the lower layer arranged on the side farther from the skin, and between the upper layer and the lower layer.
  • the basis weight of the antibacterial agent in the upper layer is 105% or more and 200% or less, preferably 110% or more and 180% or less with respect to the basis weight of the antibacterial agent in the intermediate layer, according to ⁇ 14> or ⁇ 15>.
  • the absorber described. ⁇ 17> The basis weight of the antibacterial agent in the lower layer is 105% or more and 200% or less, preferably 110% or more and 180% or less with respect to the basis weight of the antibacterial agent in the upper layer, any of the above ⁇ 14> to ⁇ 16>.
  • the basis weight of the antimicrobial agent in the lower layer 0.00003g / m 2 or more 0.3 g / m 2 or less, preferably 0.0001 g / m 2 or more 0.1 g / m 2 or less, the ⁇ 14> - ⁇ 17>
  • the absorber according to any one of 1. ⁇ 19>
  • the absorber is divided into three equal parts in the thickness direction, and the absorber is arranged in an absorbent article on the side closer to the skin, the lower layer arranged on the side farther from the skin, and between the upper layer and the lower layer.
  • the basis weight of the binder in the upper layer is 105% or more and 200% or less, preferably 110% or more and 180% or less with respect to the basis weight of the antibacterial agent in the lower layer, according to ⁇ 19> or ⁇ 20>.
  • Absorber. ⁇ 22> The basis weight of the binder in the lower layer is 105% or more and 200% or less, preferably 110% or more and 180% or less with respect to the basis weight of the antibacterial agent in the upper layer, any of the above ⁇ 19> to ⁇ 21>.
  • the basis weight of the binder in the upper layer is 1 g / m 2 or more and 20 g / m 2 or less, preferably 3 g / m 2 or more and 18 g / m 2 or less, according to any one of ⁇ 19> to ⁇ 22>.
  • Absorber. ⁇ 24> The absorber comprises an absorbent core containing the water-absorbent polymer, the antibacterial agent, and the cellulose fibers, and a core wrap sheet that covers the outer surface of the absorbent core.
  • the absorber is divided into three equal parts in the thickness direction, and the absorber is arranged in an absorbent article on the side closer to the skin, the lower layer arranged on the side farther from the skin, and between the upper layer and the lower layer.
  • the core wrap sheet arranged in the lower layer has a higher basis weight of the cellulose fibers than the core wrap sheet arranged in the upper layer.
  • the absorber according to any one of. ⁇ 25> The absorber according to any one of ⁇ 1> to ⁇ 24>, wherein the antibacterial agent is a component that exhibits a positive charge when ionized in water.
  • the antibacterial agent is one or more selected from benzalkonium cetyl phosphate, benzethonium chloride, benzalkonium chloride, and cetylpyridinium chloride.
  • the hydrophobic thermoplastic resin is styrene-ethylene-butylene-styrene (SEBS) type, styrene-isoprene-styrene (SIS) type, styrene-butylene-styrene (SBS) type, styrene-ethylene-propylene-styrene type (
  • SEBS styrene-ethylene-butylene-styrene
  • SIS styrene-isoprene-styrene
  • SBS styrene-butylene-styrene
  • SEPS ethylene-propylene-styrene type
  • PVA polyvinyl alcohol
  • an absorber having both antibacterial properties of the absorber and suppression of stickiness due to the reconstituted body fluid, and an absorbent article having the same.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2020/031306 2019-08-26 2020-08-19 吸収体及び吸収性物品 WO2021039543A1 (ja)

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Citations (10)

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Publication number Priority date Publication date Assignee Title
JPH042345A (ja) * 1990-04-19 1992-01-07 Daio Paper Corp 紙おむつ
JPH07268752A (ja) * 1994-03-24 1995-10-17 Habitsukusu Kk 機能性不織布及びその製造方法
JPH08500271A (ja) * 1992-08-17 1996-01-16 ウェヤーハウザー・カンパニー 粒子バインダー
JP2003290290A (ja) * 2002-02-04 2003-10-14 Nippon Shokubai Co Ltd 吸収体、その製造方法およびそれを用いた吸収性物品
JP2005198701A (ja) * 2004-01-13 2005-07-28 Daio Paper Corp 吸収性物品およびその製造方法
WO2006011625A1 (ja) * 2004-07-30 2006-02-02 Mitsubishi Chemical Corporation 吸液性複合体及びその製造方法、吸液性物品並びにノズル
WO2007139154A1 (ja) * 2006-05-31 2007-12-06 Daio Paper Corporation 吸収性物品および吸収要素の製造方法
JP2010194254A (ja) * 2009-02-27 2010-09-09 Kao Corp 吸収性物品
JP2015116360A (ja) * 2013-12-19 2015-06-25 花王株式会社 吸収性物品
JP2016168336A (ja) * 2015-03-11 2016-09-23 花王株式会社 吸収性物品

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3222476U (ja) * 2019-05-23 2019-08-01 花王株式会社 生理用吸収性物品

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH042345A (ja) * 1990-04-19 1992-01-07 Daio Paper Corp 紙おむつ
JPH08500271A (ja) * 1992-08-17 1996-01-16 ウェヤーハウザー・カンパニー 粒子バインダー
JPH07268752A (ja) * 1994-03-24 1995-10-17 Habitsukusu Kk 機能性不織布及びその製造方法
JP2003290290A (ja) * 2002-02-04 2003-10-14 Nippon Shokubai Co Ltd 吸収体、その製造方法およびそれを用いた吸収性物品
JP2005198701A (ja) * 2004-01-13 2005-07-28 Daio Paper Corp 吸収性物品およびその製造方法
WO2006011625A1 (ja) * 2004-07-30 2006-02-02 Mitsubishi Chemical Corporation 吸液性複合体及びその製造方法、吸液性物品並びにノズル
WO2007139154A1 (ja) * 2006-05-31 2007-12-06 Daio Paper Corporation 吸収性物品および吸収要素の製造方法
JP2010194254A (ja) * 2009-02-27 2010-09-09 Kao Corp 吸収性物品
JP2015116360A (ja) * 2013-12-19 2015-06-25 花王株式会社 吸収性物品
JP2016168336A (ja) * 2015-03-11 2016-09-23 花王株式会社 吸収性物品

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