WO2012133824A1 - Adjuvant de rétention d'eau, et matériau absorbant, absorbant et objet absorbant le comprenant - Google Patents

Adjuvant de rétention d'eau, et matériau absorbant, absorbant et objet absorbant le comprenant Download PDF

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Publication number
WO2012133824A1
WO2012133824A1 PCT/JP2012/058686 JP2012058686W WO2012133824A1 WO 2012133824 A1 WO2012133824 A1 WO 2012133824A1 JP 2012058686 W JP2012058686 W JP 2012058686W WO 2012133824 A1 WO2012133824 A1 WO 2012133824A1
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Prior art keywords
water
water retention
absorbent
retention aid
polysaccharide
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Application number
PCT/JP2012/058686
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English (en)
Japanese (ja)
Inventor
中下　将志
三井　浩一郎
依里 寺田
征則 小西
橋本　望
梨江 松本
Original Assignee
ユニ・チャーム株式会社
富田製薬株式会社
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Priority to JP2013507815A priority Critical patent/JP6113069B2/ja
Publication of WO2012133824A1 publication Critical patent/WO2012133824A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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
    • A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/225—Mixtures of macromolecular compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/26—Cellulose ethers
    • C08L1/28—Alkyl ethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/26—Cellulose ethers
    • C08L1/28—Alkyl ethers
    • C08L1/284—Alkyl ethers with hydroxylated hydrocarbon radicals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/26—Cellulose ethers
    • C08L1/28—Alkyl ethers
    • C08L1/286—Alkyl ethers substituted with acid radicals, e.g. carboxymethyl cellulose [CMC]
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00

Definitions

  • the present invention relates to a novel water retention aid and an absorbent material, absorber and absorbent article containing the same.
  • absorbent articles such as disposable paper diapers and sanitary napkins use absorbents for absorbing excrement, body fluids, and the like.
  • the absorbent body is generally composed of an absorbent material and a water-permeable member (pulp fiber or the like) that holds the absorbent material.
  • a highly water-absorbing polymer is frequently used as the absorbent material.
  • the superabsorbent polymer has the ability to absorb and retain water several tens to several thousand times its own weight, but it has sufficient water retention for liquids containing a large amount of ions such as urine. is not. For this reason, in order to raise water retention, the method of using thickeners, such as polysaccharide, together is proposed.
  • an absorbent material obtained by mixing these two components with one or two or more substances selected from guar gum, alginate, and xanthan gum as other components Known (Patent Document 1).
  • a body fluid that contains a polysaccharide that can thicken in the presence of a polyvalent metal ion, and that the polysaccharide is present in a state where it can be dissolved or dissociated in the water in the body fluid or excreta, or An excrement thickened article is known (Patent Documents 2 and 3).
  • JP 52-59651 A JP 2000-201976 JP 2010-148923
  • an object of the present invention is to provide a water retention aid capable of exhibiting excellent water retention while suppressing a significant decrease in absorption rate. Furthermore, this invention aims at providing the absorber and absorber which contain the said water retention aid.
  • the present invention relates to the following water retention aids and absorbent materials, absorbent bodies and absorbent articles containing the same.
  • a water retention aid contained in an absorbent for absorbing a liquid wherein the water retention aid comprises a polysaccharide (excluding a cellulose compound) and a cellulose compound.
  • the water retention aid according to Item 1 wherein 3 to 25 parts by weight of a cellulose-based compound is contained per 100 parts by weight of the polysaccharide.
  • the water retention aid according to Item 1 wherein the polysaccharide is a water-soluble polysaccharide. 4).
  • the water retention aid according to Item 1 wherein the polysaccharide is at least one of guar gum, xanthan gum, glucomannan, carrageenan, locust bean gum, tamarind seed polysaccharide and pullulan. 5.
  • Item 2. The water retention aid according to Item 1, wherein the cellulose compound is at least one of hydroxypropylcellulose, ethylcellulose, carboxymethylcellulose, crystalline cellulose, and methylcellulose. 6).
  • Item 2. The water retention aid according to Item 1, wherein the particles have an average particle size of 150 to 550 ⁇ m. 7.
  • the water retention aid according to Item 1 comprising particles obtained by granulating a raw material powder containing the polysaccharide and the cellulose-based compound. 9. Item 9. The water retention aid according to Item 8, wherein the particle surface is further coated with a surface treatment agent containing a cellulose compound. 10. Item 10. An absorbent material comprising at least the water retention aid according to any one of Items 1 to 9 and a water absorbent material. 11. An absorbent body for absorbing a liquid, wherein a water retention aid containing a polysaccharide (excluding a cellulose compound) and a cellulose compound is held by a water permeable member. 12 Item 12. The absorbent body according to Item 11, wherein the water-absorbing material is held by the water-permeable member. 13.
  • Item 13 The absorbent body according to Item 12, comprising 1) a region containing a water retention aid and not containing a water absorbing material, and 2) a region containing no water retention aid and containing a water absorption material.
  • a multilayer structure comprising a water retention aid and an absorbent material, wherein 1) a water retention aid and / or a water absorbing material comprising a polysaccharide (excluding a cellulose compound) and a cellulose compound are disposed on a water permeable member.
  • Step and 2) An absorbent body comprising a multilayer structure obtained by a method in which a series of steps including a step of laminating one or two or more water-permeable members is performed once or more. 15.
  • a multilayer structure comprising a water retention aid and an absorbent material, comprising 1) placing a water retention aid and a water absorbent material comprising a polysaccharide (excluding a cellulose compound) and a cellulose compound on a water permeable member; 2) a step of laminating one or more water-permeable members from above, 3) a step of arranging a water-absorbing material from above, and 4) one or more layers of water-permeable members from above
  • An absorber comprising a multilayer structure obtained by a method including a step of laminating and the step of 3) and / or 4) being performed one or more times. 16. Item 16.
  • the water retention aid is a granulated product obtained by granulating a raw material powder containing a polysaccharide (excluding a cellulose compound) and a cellulose compound. body. 17.
  • Item 18 An absorbent article comprising the absorber according to any one of Items 11 to 17.
  • Water retention aids having such characteristics are absorbent articles for absorbing liquids (especially water or liquids using the same, such as body fluids of humans, animals, blood, excrement, secretions, etc.) It is suitable for uses such as disposable paper diapers, sanitary napkins, cloth diaper liners, panty liners, incontinence pads, surgical blood absorbents and the like.
  • FIG. 1A and FIG. 1B are schematic views showing a procedure for producing an absorber in the examples.
  • Fig.1 (a) shows the state before laminating a water-permeable member from the top.
  • FIG.1 (b) shows the state which laminated
  • FIGS. 2A and 2B are schematic views showing the layer structure of the multilayer body and the absorber made of the multilayer structure produced in the examples.
  • Fig.2 (a) shows the laminated body before pressing.
  • FIG.2 (b) shows the absorber obtained by pressing a laminated body.
  • FIGS. 3A and 3B are schematic views showing a procedure for producing an absorber in a comparative example.
  • FIGS.3 (a) shows the state before laminating a water-permeable member from the top.
  • FIG.3 (b) shows the state which laminated
  • FIGS. 4A and 4B are schematic views showing the layer structure of a multilayer body and an absorber having a multilayer structure manufactured in a comparative example.
  • Fig.4 (a) shows the laminated body before pressing.
  • FIG.4 (b) shows the absorber obtained by pressing a laminated body.
  • FIGS. 5A and 5B are schematic views showing the layer structure of the multilayer body and the absorber made of the multilayer structure manufactured in the example.
  • Fig.5 (a) shows the laminated body before pressing.
  • FIG.5 (b) shows the absorber obtained by pressing a laminated body.
  • FIGS. 6A and 6B are schematic views showing a layered structure and a layered structure of an absorbent body having a multilayer structure manufactured in a comparative example.
  • Fig.6 (a) shows the laminated body before pressing.
  • FIG.6 (b) shows the absorber obtained by pressing a laminated body.
  • 7A to 7C are schematic views showing specific examples of the planar structure of the absorber of the present invention.
  • FIGS. 8A to 8D are schematic views showing a procedure for manufacturing an absorber in the example.
  • FIG. 8A shows a state before the water-permeable member is laminated from above.
  • FIG.8 (b) shows the state which laminated
  • FIG.8 (c) shows the state which sprinkled the superabsorbent polymer particle uniformly on it.
  • FIG.8 (d) shows the state which laminated
  • FIGS. 9A and 9B are schematic views showing the layer structure of the multilayer structure and the absorber made of the multilayer structure manufactured in the example.
  • Fig.9 (a) shows the laminated body before pressing.
  • FIG.9 (b) shows the absorber obtained by pressing a laminated body.
  • FIGS. 10A (a) to 10 (d) are schematic views showing a procedure for producing an absorber in the example.
  • FIG. 10A (a) shows a state before the water-permeable member is laminated from above.
  • FIG. 10A (a) shows a state before the water-permeable member is laminated from above.
  • FIG. 10A (b) shows a state where water-permeable members are laminated.
  • FIG. 10A (c) shows a state in which the laminated water-permeable member is turned over.
  • FIG.10 (d) shows the state which sprinkled the absorber equally on it.
  • 10B (e) to (g) are continued from FIG. 10A.
  • FIG. 10B (e) shows a state in which a water permeable member is laminated thereon after FIG. 10A (d).
  • FIG. 10B (f) shows a state in which the absorbent material is evenly sprinkled thereon.
  • FIG. 10B (g) shows a state in which a water-permeable member is further laminated thereon.
  • FIGS. 11A and 11B are schematic views showing the layer structure of the multilayer body and the absorber made of the multilayer structure manufactured in the example.
  • Fig.11 (a) shows the laminated body before pressing.
  • FIG.11 (b) shows the absorber obtained by pressing a laminated body.
  • 12 (a) to 12 (c) are schematic views showing the layer structure of the multilayer structure produced in the example and the layer structure of the absorbent article.
  • Fig.12 (a) shows the laminated body before pressing.
  • FIG.12 (b) shows the laminated body after pressing.
  • FIG.12 (c) shows the absorbent article obtained by adding a liquid-permeable sheet and a liquid-impermeable sheet to the pressed laminated body.
  • FIG.13 (a) shows the laminated body before pressing.
  • FIG.13 (b) shows the laminated body after pressing.
  • FIG.13 (c) shows the absorbent article obtained by adding a liquid-permeable sheet and a liquid-impermeable sheet to the pressed laminated body.
  • Water retention aid and its production (1) Water retention aid
  • the water retention aid of the present invention (hereinafter also referred to as “the present water retention aid") is a water retention aid contained in an absorbent for absorbing a liquid.
  • the water retention aid contains polysaccharides (excluding cellulose compounds) and cellulose compounds.
  • the “polysaccharide” in the present specification means a polysaccharide excluding a cellulosic compound.
  • the water retention aid of the present invention contains a polysaccharide and a cellulose compound.
  • the ratio of the total amount of the polysaccharide and the cellulose-based compound in the water retention aid of the present invention is not particularly limited, but it is usually preferably 80 to 100% by weight, particularly 95 to 100% by weight.
  • the polysaccharide is not limited, and for example, a known or commercially available polysaccharide can be adopted.
  • the polysaccharide is particularly preferably a water-soluble polysaccharide.
  • the water-soluble in the present invention means that 0.01% by weight or more dissolves in pure water at 20 ° C.
  • Such a water-soluble polysaccharide is not limited, but it is preferable to use at least one of guar gum, xanthan gum, glucomannan, carrageenan, locust bean gum, tamarind seed polysaccharide and pullulan. Among these, at least one of guar gum and xanthan gum is particularly preferable.
  • the cellulose compound is not particularly limited, and a known or commercially available cellulose compound can be used.
  • a known or commercially available cellulose compound can be used.
  • at least one of hydroxypropyl cellulose, ethyl cellulose, carboxymethyl cellulose, crystalline cellulose, and methyl cellulose can be suitably used.
  • at least one of hydroxypropyl cellulose and ethyl cellulose is more preferable.
  • the ratio of the polysaccharide and the cellulose compound in the water retention aid of the present invention can be appropriately set according to the desired water retention, absorption rate, etc., but preferably the cellulose compound 1 with respect to 100 parts by weight of the polysaccharide. 50 to 50 parts by weight, more preferably 3 to 25 parts by weight of a cellulosic compound per 100 parts by weight of polysaccharide. By setting within such a range, the effect of exhibiting excellent water retention can be more reliably obtained while suppressing a significant decrease in absorption rate.
  • the form of the water retention aid of the present invention is not particularly limited, but it is generally desirable to provide it in the form of granules (powder).
  • the average particle diameter can be appropriately changed, but it is usually about 100 to 700 ⁇ m, preferably 150 to 550 ⁇ m.
  • the water retention aid of the present invention preferably contains particles containing a polysaccharide and a cellulose compound. That is, it is desirable to contain particles containing a polysaccharide and a cellulose compound in one particle. By adopting such particles, it is possible to more reliably obtain the effect of exhibiting excellent water retention while suppressing a significant decrease in absorption rate. As such particles, for example, a granulated product obtained by granulating a raw material powder containing a polysaccharide and a cellulose compound can be obtained.
  • the water retention aid of the present invention may contain components other than polysaccharides and cellulose compounds within a range that does not greatly hinder the effects of the present invention, if necessary.
  • examples thereof include known additives such as antibacterial agents, adsorbents, pH adjusters, stabilizers, anti-inflammatory agents, coloring agents, and fragrances.
  • the water retention aid of the present invention is used in an absorber for absorbing liquid.
  • it can be suitably used for absorbent articles for absorbing body fluids such as humans and animals, blood, excrement, secretions and the like.
  • the method for producing the water retention aid of the present invention is not particularly limited as long as at least the polysaccharide and the cellulose compound can be uniformly mixed.
  • a raw material powder containing the polysaccharide and the cellulose compound is used. It can manufacture suitably by granulating.
  • the granulation method is not particularly limited, and a known method can be adopted.
  • rolling granulation method, stirring granulation method, fluidized bed granulation method, compression molding method, film forming method, magnetic property processing method, surface modification method, sintering molding method, vibration molding method, pressure swing method Any of vacuum forming methods and the like may be used.
  • the granulation can be performed using a known or commercially available granulator.
  • the granulation can be suitably performed by a rolling granulation method, a stirring granulation method, a fluidized bed granulation method, or the like.
  • the granulation may be either a wet method or a dry method, but in the present invention, it can be suitably granulated particularly by a wet method.
  • the type of the solvent is not limited, and a polar solvent can be suitably used.
  • the amount of the solvent used is usually about 10 to 300 parts by weight with respect to 100 parts by weight of the raw material powder.
  • Granulation is preferably controlled so as to have the predetermined average particle diameter. That is, it is usually about 100 to 700 ⁇ m, particularly preferably 150 to 550 ⁇ m. Moreover, after granulation, according to a well-known method, processes, such as drying, classification, coating, etc., can also be implemented as needed.
  • the granulated product obtained by the above granulation may be further subjected to a coating treatment.
  • the surface of the granulated product of the water retention aid can be coated with a surface treatment agent containing a cellulose compound.
  • the effect of controlling the dissolution of the granulated product can be obtained by coating the granulated product with a surface treatment agent containing a cellulose compound.
  • the cellulose compound the same ones as described above can be used. Any known method may be used for the coating treatment.
  • any of a method of spraying and drying a solution in which a cellulose compound is dissolved in a solvent a method of spraying a solvent to a mixture of a cellulose compound and a water retention aid, and the like may be used.
  • a solution in which a cellulose compound is dissolved in a solvent can be suitably coated by a method of spraying and drying a water retention aid. More specifically, a pan coating method, a fluidized bed coating method, a rolling fluidized bed coating method, a stirring rolling fluidized bed coating method, or the like can be used. The coating can be performed using a known or commercially available coating apparatus.
  • the amount of the cellulosic compound used for the coating treatment can be set as appropriate, but may be about 1 to 25 parts by weight of the cellulosic compound with respect to 100 parts by weight of the granulated water retention aid. More preferably, the cellulose compound is used in an amount of about 5 to 15 parts by weight per 100 parts by weight of the granulated water retention aid. 2.
  • the present invention includes an absorbent material (hereinafter also referred to as “the present invention absorbent material”) comprising the water retention aid of the present invention and a water absorbent material. That is, the absorbent composition containing the water retention aid of the present invention and a water absorbing material is included.
  • the present absorbent material includes a water-absorbing material in addition to the present water retention aid.
  • a water absorbing polymer can be preferably used.
  • a known or commercially available high water absorbing polymer can be suitably used. More specifically, for example, polyacrylate polymer, starch-acrylate graft polymer, vinyl acetate copolymer, maleic anhydride copolymer, polyvinyl alcohol, CMC, and the like can be mentioned. These can generally be used in the form of powder, fine granules, granules, fibers and the like.
  • the content ratio of the water retention aid of the present invention and the water-absorbing material can be appropriately set according to the type of the water-absorbing material to be used, the desired water retention, etc.
  • the water retention aid of the present invention is preferably 1 to 10 parts by weight, particularly 2.5 to 7.5 parts by weight, and more preferably 3 to 7 parts by weight with respect to 100 parts by weight of the water-absorbing material. Within this range, even better water retention can be obtained while maintaining the desired absorption rate.
  • the water retention aid and absorbent material of the present invention may be contained in the absorber in any form.
  • it may be a mixed powder of the powder of the water retention aid of the present invention and the powder of the absorbent material, or a granulated product obtained by granulating a material containing the water retention aid of the present invention and the absorbent material. There may be.
  • the absorbent material of the present invention may contain additives as described above as needed in addition to the water retention aid and water absorbent material of the present invention.
  • the present invention includes an absorbent body in which at least a water retention aid is held (or fixed) on a water permeable member. Therefore, as an absorbent body of the present invention, for example, 1) an absorbent body in which an absorbent material containing a water retention aid and a water absorbent material is held by a water permeable member, and 2) a material containing the water retention aid and a water absorbent material. Any of the absorbers etc. by which the material to contain is separately hold
  • Examples of the absorber 1) include those in which a mixture containing a water retention aid and a water absorbing material is held (fixed) on a water permeable member.
  • As the absorber of 2) for example, a material containing a water retention aid and a material containing a water absorbing material are held (fixed) to the water permeable member in a state of being separated by the water permeable member or other materials. And the like.
  • the porous material may be any material that allows water or a liquid that uses water as a solvent (medium) to pass therethrough.
  • a fibrous sheet, a porous polymer sheet, or the like can be suitably used.
  • a fibrous sheet any of a nonwoven fabric, a woven fabric, etc. may be sufficient.
  • synthetic fibers other than natural fibers, such as fluff pulp can also be used.
  • a porous synthetic resin sheet can be used as the porous polymer sheet. These can also use the material currently used by the well-known or commercially available absorber.
  • a fluff pulp laminate composed of natural fibers preferably fluff pulp
  • the means for retaining the water retention aid and the like is not particularly limited, and the same method as in the case of a known or commercially available absorber can be employed.
  • a method of filling the water permeable member of the bag body with a water retention aid a method of filling the pores (gap) of the water permeable member by pressurizing the water retention aid, etc., an adhesive or an adhesive to the water permeable member.
  • Examples thereof include a fixing method and a method of forming after mixing a material capable of constituting a water-permeable member and a water retention aid.
  • the content of the water retention aid in the absorber can be appropriately changed according to the desired water absorption and the like.
  • the ratio to the water-absorbing material is 2. It is preferable to adjust within the range indicated by.
  • the structure of the absorbent body of the present invention is not particularly limited, but preferably has a multilayer structure.
  • an absorbent body having a multilayer structure including at least one layer made of a water-permeable member and a water retention aid and / or a water-absorbing material held by the member can be suitably used.
  • a multilayer structure for example, a multilayer structure manufactured by the following method can be suitably employed.
  • a multilayer structure comprising a water retention aid and an absorbent material, 1) a step of placing a water retention aid and / or a water absorbing material comprising a polysaccharide and a cellulosic compound on the water permeable member, and 2) A multilayer structure obtained by a method in which a series of steps including a step of laminating one layer or two or more layers of a water-permeable member is performed at least once.
  • position, or the density in each layer of a water-permeable member can be changed suitably.
  • a multilayer structure comprising a water retention aid and an absorbent material, 1) a step of placing a water retention aid and a water absorbent material comprising a polysaccharide and a cellulosic compound on the water permeable member, and 2) from above Including a step of laminating one or more water-permeable members and 3) a step of disposing a water-absorbing material from above, and 4) a step of laminating one or more layers of water-permeable members from above.
  • the mixing density of the water retention aid and / or the absorbent material to be mixed or the density in each layer of the water-permeable member can be appropriately changed.
  • the amount of the water retention aid and / or absorbent material and the water permeable member to be mixed can be appropriately changed.
  • a multilayer structure comprising a water retention aid and an absorbent material, the water retention aid comprising a polysaccharide and a cellulose compound and / or a layer comprising a mixture comprising a water absorbent material and a fibrous material, A step of laminating one layer or two or more layers of a water retention aid and / or a mixture comprising a water-absorbing material and a fibrous material containing a polysaccharide and a cellulose compound, or two or more layers; The resulting multilayer structure.
  • the mixing density of the water retention aid and / or the absorbent material to be mixed or the density in each layer of the water-permeable member can be appropriately changed.
  • the weight of the water retention aid and / or the absorbent material and the water permeable member to be mixed can be appropriately changed.
  • the fibrous material to be used is not limited as long as it is a material that can constitute the water-permeable member, and known or commercially available short fibers or long fibers can be used. More specifically, pulp (fiber) or the like can be used. As the pulp itself, known or commercially available ones can be used.
  • the form of the water retention aid and the water-absorbing material is not limited.
  • any of powder, granule (granulated product), molded product, etc. Forms can also be employed.
  • a powder or granular water retention aid and a powder or granular water-absorbing material can be suitably used.
  • the laminate when forming a multilayer structure, can be pressurized as necessary.
  • a method of pressurizing a method using a known or commercially available press device or the like can be adopted.
  • the water retention aid and / or the water absorbent material is held inside the water permeable member, 2) The water retention aid and / or the water absorbent material is held on the surface of the water permeable member. Any structure such as the case of being included is included.
  • each layer contains both a water retention aid and a water absorbing material
  • a region that contains a water retention aid and does not contain a water absorbent material a water retention aid region
  • no water retention aid a region that contains an absorbent material (absorbent material region) coexists.
  • the planar structure of the absorbent body of the present invention is not limited.
  • one layer is a layer made of a water retention assistant region or a layer made of an absorbent material region
  • FIG. 7 (a) to FIG. As shown, the absorbent material region 72 is disposed in the center, and the water retention aid region 71 is disposed in the whole or a part of the periphery of the absorbent material region (both ends in the longitudinal direction or the short direction).
  • a planar structure may be used.
  • the structure of the absorber of the present invention By making the structure of the absorber of the present invention a multi-layer structure, the water retention effect is enhanced by arranging at least the water retention aid close to each other, and it is possible to efficiently reduce rewetting. In addition, since the swelling due to the place is easily averaged, it is possible to obtain an effect that the thickness of the absorbent body as a whole is difficult to be uneven. 4).
  • Absorbent article TECHNICAL FIELD This invention includes the absorbent article (product) containing an absorber.
  • the absorbent article of the present invention can employ a known configuration except that the absorbent body of the present invention is used as the absorbent body.
  • these absorbent articles can be manufactured (assembled) by a known method according to the type of each article.
  • the absorbent article for example, 1) a liquid-permeable sheet located on the skin contact surface side of the wearer, 2) a liquid-impermeable sheet located on the non-skin contact surface side of the wearer, and 3)
  • Examples include an absorbent article including an absorber disposed between the liquid-permeable sheet and the liquid-impermeable sheet.
  • liquid permeable sheet those used in known or commercially available absorbent articles can be used.
  • a sheet-like material having a structure that allows liquid to permeate such as an apertured film, a woven fabric, and a non-woven fabric.
  • the fibers constituting the woven fabric and the nonwoven fabric may be either natural fibers or chemical fibers.
  • natural fibers include cellulose such as pulverized pulp and cotton.
  • chemical fiber include regenerated cellulose such as rayon and fibril rayon; semi-synthetic cellulose such as acetate and triacetate; thermoplastic hydrophobic chemical fiber and thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment.
  • thermoplastic hydrophobic chemical fiber examples include fibers made of a graft polymer of PE and PP in addition to single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).
  • nonwoven fabric examples include air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, needle punched nonwoven fabric, melt blown nonwoven fabric, and nonwoven fabrics composed of these combinations (for example, SMS).
  • the liquid-impermeable sheet may be any sheet that does not allow liquid to pass through, but is preferably one that allows gas to pass through.
  • a film containing PE, PP or the like a resin film having air permeability; a resin film having air permeability bonded to a nonwoven fabric such as spunbond or spunlace; and a multilayer nonwoven fabric such as SMS.
  • a low density polyethylene (LDPE) film having a basis weight of about 15 to about 30 g / m 2 is preferable.
  • a second sheet can be included as a separate layer between the liquid-permeable sheet and the absorber.
  • the same sheet as the liquid permeable sheet can be used.
  • the whole or a part of the absorbent body contained in the absorbent article may be covered with a layer (so-called core wrap) having a liquid permeability and a barrier property that the absorbent does not permeate.
  • a layer such as core wrap
  • a woven fabric or a non-woven fabric can be used as the layer.
  • the woven fabric and non-woven fabric include natural fibers, chemical fibers, and tissue paper.
  • the absorbent article of the present invention examples include the same uses as known or commercially available absorbent articles. For example, it can be applied to disposable paper diapers, sanitary napkins, cloth diaper liners, panty liners, incontinence pads, surgical blood absorbing materials, and the like.
  • the measurement of the average particle diameter in each Example and the comparative example was implemented with the following method. That is, with an automatic dry type sonic sieving measuring instrument (manufactured by Seishin Co., Ltd., ROBOT SIFTER RPS-105), JIS standard sieve opening 710 ⁇ m (22 mesh), opening 500 ⁇ m (30 mesh), opening 425 ⁇ m (36 mesh), eyes By sieving 5 g of sample for 5 minutes using an opening of 355 ⁇ m (42 mesh), an opening of 300 ⁇ m (50 mesh), an opening of 250 ⁇ m (60 mesh), an opening of 180 ⁇ m (83 mesh), and an opening of 106 ⁇ m (140 mesh) The particle size distribution was measured. And the integrated 50 mass% particle diameter in sieving integrated distribution was made into the average particle diameter.
  • an automatic dry type sonic sieving measuring instrument manufactured by Seishin Co., Ltd., ROBOT SIFTER RPS-105
  • Example 1 After charging 100 parts by weight of commercially available guar gum as a polysaccharide and 3 parts by weight of commercially available hydroxypropyl cellulose as a cellulose compound into a high speed mixer (manufactured by Fukae Pautech), 40 parts by weight of ethanol was used as a solvent. Done the grain. This was dried at 40 ° C. and then classified to produce a water retention assistant comprising granules having an average particle size of about 300 ⁇ m (255 to 350 ⁇ m). Next, 7.5 g of an absorbent was prepared by mixing 0.36 g of the obtained water retention aid with a superabsorbent polymer (Sumitomo Seika Co., Ltd., Aqua Keep SA55SXII).
  • the absorbent material (7.5 g) was divided into four equal parts, and an absorbent body was produced according to the procedure shown in FIG. That is, an absorbent material (1.875 g) obtained by dividing the absorbent material composed of the highly water-absorbing polymer particles 3 and the water retention aid particles 4 into four equal parts is shown in FIG. Pulp laminate; basis weight 50 g / m 2 , size 30 cm ⁇ 10 cm, weight of 1.5 g per sheet) was uniformly sprinkled over, and then the pulp layer 5 was placed from above as shown in FIG. . By repeating the steps shown in FIGS. 1A and 1B four times, “pulp layer / absorbent layer / pulp layer / absorbent layer / pulp layer / absorption as shown in FIG.
  • a laminate 6 composed of “material layer / pulp layer / absorbent layer / pulp layer” was produced. Thereafter, the laminate 6 is pressed under the conditions of a pressing pressure of 80 kg / cm 2 , a pressing temperature of 30 ° C., a pressing time of 10 to 15 seconds ⁇ 4 times, as shown in FIG.
  • a pressing pressure of 80 kg / cm 2 a pressing temperature of 30 ° C.
  • a pressing time of 10 to 15 seconds ⁇ 4 times as shown in FIG.
  • an absorbent body 7 (15 g) in which the superabsorbent polymer particles 3 and the water retention aid particles 4 constituting the structure were held in the pulp layer 5 was obtained.
  • Example 2 A water retention aid, an absorbent material and an absorbent were produced in the same manner as in Example 1 except that 7 parts by weight of hydroxypropylcellulose was used.
  • Example 3 A water retention aid, an absorbent material and an absorbent were produced in the same manner as in Example 1 except that 15 parts by weight of hydroxypropylcellulose was used.
  • Example 4 A water retention aid, an absorbent material and an absorbent were produced in the same manner as in Example 1 except that 25 parts by weight of hydroxypropylcellulose was used.
  • Comparative Example 1 By classifying commercially available guar gum, guar gum powder having an average particle size of about 300 ⁇ m (255 to 350 ⁇ m) was obtained. Next, 0.3 g of guar gum powder obtained in place of the water retention aid was mixed with a superabsorbent polymer similar to that in Example 1 to prepare 7.5 g of an absorbent material. Thus, an absorber was produced.
  • Comparative Example 2 Only 7.5 g of the superabsorbent polymer similar to that in Example 1 was used as the absorbent. This was divided into four equal parts, and an absorber was produced according to the procedure shown in FIG. That is, the absorbent material (1.875 g) obtained by dividing the absorbent material composed of the superabsorbent polymer particles 3 into four equal parts is a water-permeable pulp layer 5 (fluff pulp laminate; basis weight) as shown in FIG. 50 g / m 2 , size 30 cm ⁇ 10 cm, weight of 1.5 g per sheet), and then the pulp layer 5 was placed from above as shown in FIG. By repeating the process shown in FIGS.
  • FIG. 3A and 3B four times, “pulp layer / absorbent layer / pulp layer / absorbent layer / pulp layer / absorbent layer / shown in FIG.
  • a laminate 10 composed of “pulp layer / absorbent layer / pulp layer” was produced. Thereafter, this laminate is pressed under the conditions of a pressing pressure of 80 kg / cm 2 , a pressing temperature of 30 ° C., and a pressing time of 10 to 15 seconds ⁇ 4 times, so that an absorbent material is obtained as shown in FIG.
  • An absorbent body 11 (15 g) in which the superabsorbent polymer particles 3 constituting the structure were held in the pulp layer 5 was obtained.
  • Test example 1 For the absorbers of Examples and Comparative Examples, the absorption time (the time for which the absorber absorbs a certain amount of artificial urine), rewet (the amount of liquid that reverts when the absorber is loaded with a weight after absorbing artificial urine) and The amount of water retained was measured. The results are shown in Table 1. In addition, the measuring method of each physical property was implemented as follows.
  • Comparative Example 1 the result of rewetting was inferior to that of Comparative Example 2, so that the water retention immediately after the liquid was absorbed by the absorber was poor and it was difficult to say that the water retention was sufficiently improved. . Further, it can be seen that in Examples 1 to 4, both rewetting and water retention are superior to those of Comparative Example 1.
  • Example 5 A water retention aid, an absorbent and an absorber were prepared in the same manner as in Example 2 except that 100 parts by weight of commercially available xanthan gum was used as the polysaccharide instead of 100 parts by weight of guar gum.
  • Test example 2 Tests were carried out in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 2 and 5 and Comparative Example 2. The results are shown in Table 2.
  • Example 2 and Example 5 expresses superior performance as compared with Comparative Example 2. That is, in these examples, water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is increased, the absorption rate tends to decrease, but in Examples 2 and 5, it is understood that there is no such decrease phenomenon.
  • the water retention aid of the present invention can obtain desired performance without being limited to the type of polysaccharide.
  • Example 6 A water retention aid, an absorbent material and an absorbent were prepared in the same manner as in Example 2 except that commercially available ethyl cellulose was used in place of hydroxypropyl cellulose as the cellulose compound.
  • Test example 3 Tests were conducted in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 2 and 6 and Comparative Example 2. The results are shown in Table 3.
  • Example 2 and Example 6 exhibits an effect superior to that of Comparative Example 2. That is, in these examples, water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate decreases, but from the results of the absorption time, such a decrease is not observed in Example 2 and Example 6.
  • the present invention it is possible to provide an absorbent body having excellent water retention without reducing the absorption rate even if the kind of the cellulose-based compound as the water retention aid is changed. That is, with the water retention aid of the present invention, the desired performance can be obtained without being limited to the type of cellulose compound.
  • Example 7 A water retention aid, an absorbent material and an absorber were prepared in the same manner as in Example 2 except that the average particle size of the water retention aid was adjusted to 500 ⁇ m (420 to 590 ⁇ m).
  • Example 8 A water retention aid, an absorbent material and an absorber were prepared in the same manner as in Example 2 except that the average particle size of the water retention aid was adjusted to 300 ⁇ m (100 to 500 ⁇ m).
  • Test example 4 Tests were carried out in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 2, 7, 8 and Comparative Example 2. The results are shown in Table 4.
  • Example 2 and Example 7 exhibits an effect superior to that of Comparative Example 2. That is, in these examples, water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate is decreased, but in Examples 2 and 7, the absorption rate is not decreased.
  • the present invention even if the average particle size of the water retention aid is changed, it is possible to provide an absorbent body having excellent water retention without decreasing the absorption rate. That is, with the water retention aid of the present invention, desired performance can be obtained without being limited to the size of the particles.
  • Example 8 having the same average particle diameter as in Example 2 but having a different particle size distribution.
  • Example 9 A water retention aid and absorbent material were used in the same manner as in Example 2 except that 0.36 g of the water retention aid and 7.14 g of the superabsorbent polymer were replaced with 0.22 g of the water retention aid and 7.28 g of the superabsorbent polymer. And the absorber was produced.
  • Example 10 A water retention aid and absorbent material were used in the same manner as in Example 2 except that 0.36 g of the water retention aid and 7.14 g of the superabsorbent polymer were replaced with 0.49 g of the water retention aid and 7.01 g of the superabsorbent polymer. And the absorber was produced.
  • Test Example 5 Tests were carried out in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 2, 9, 10 and Comparative Example 2. The results are shown in Table 5.
  • an absorbent body having excellent water retention can be provided without decreasing the absorption rate even if the blending ratio of the superabsorbent polymer and the water retention aid in the absorbent material is changed.
  • Example 11 A water retention aid, an absorbent material, and an absorbent material were used in the same manner as in Example 2 except that a superabsorbent polymer for water quality test (acrylic acid salt type (193-12453)) manufactured by Wako Pure Chemical Industries, Ltd. was used as the superabsorbent polymer. An absorber was prepared.
  • a superabsorbent polymer for water quality test (acrylic acid salt type (193-12453)) manufactured by Wako Pure Chemical Industries, Ltd. was used as the superabsorbent polymer.
  • An absorber was prepared.
  • Comparative Example 3 An absorbent material and an absorbent body were produced in the same manner as in Comparative Example 2 except that the same superabsorbent polymer as in Example 11 was used as the superabsorbent polymer.
  • Test Example 6 Tests were conducted in the same manner as in Test Example 1 for the absorbent bodies obtained in Example 11 and Comparative Example 3. The results are shown in Table 6.
  • Example 11 exhibits performance superior to that of Comparative Example 3. That is, in Example 11, water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate is decreased, but such a decrease is not observed in Example 11 from the result of the absorption time.
  • an absorbent body having excellent water retention can be provided without reducing the absorption rate even if the type of the superabsorbent polymer in the absorbent material is changed. That is, it can be seen that the water retention aid of the present invention can achieve the desired performance regardless of the type of superabsorbent polymer in the absorbent material.
  • Example 12 7.5 g of an absorbent material was prepared by mixing 0.36 g of the water retention aid obtained in Example 8 with 7.14 g of the same superabsorbent polymer as in Example 1. Next, the absorbent material (7.5 g) was divided into two equal parts, and an absorbent body was produced according to the procedure shown in FIG. That is, the absorbent material (3.75 g) obtained by dividing the absorbent material composed of the highly water-absorbing polymer particles 3 and the water retention aid particles 4 into two equal parts is obtained as shown in FIG. Pulp laminate; basis weight 50 g / m 2 , size 30 cm ⁇ 10 cm, weight of 1.5 g per sheet) was uniformly sprinkled over, and then the pulp layer 5 was placed from above as shown in FIG. .
  • a laminate obtained by repeating the steps shown in FIGS. 1 (a) and (b) twice is separately sandwiched between two sheet-like pulp fibers to obtain “two pulp layers” shown in FIG. 5 (a).
  • the laminated body 12 consisting of “/ absorbent layer / one pulp layer / absorbent layer / two pulp layers” was produced. Thereafter, the laminate is pressed under the conditions of a pressing pressure of 80 kg / cm 2 , a pressing temperature of 30 ° C., and a pressing time of 10 to 15 seconds ⁇ 4 times, so that an absorbent material is obtained as shown in FIG.
  • An absorbent body 13 (15 g) in which the superabsorbent polymer particles 3 and the water retention aid particles 4 constituting the component were held in the pulp layer 5 was obtained.
  • Comparative Example 4 Only 7.5 g of the superabsorbent polymer similar to that in Example 1 was used as the absorbent. This was divided into two equal parts, and an absorbent body was produced according to the procedure shown in FIG. That is, the absorbent material (3.75 g) obtained by dividing the absorbent material composed of the highly water-absorbent polymer particles 3 into four equal parts is a pulp layer 5 (fluff pulp laminate; basis weight) as a water-permeable member as shown in FIG. 50 g / m 2 , size 30 cm ⁇ 10 cm, weight of 1.5 g per sheet), and then the pulp layer 5 was placed from above as shown in FIG. A laminate obtained by repeating the steps shown in FIGS.
  • An absorbent body 15 (15 g) in which the superabsorbent polymer particles 3 constituting the structure were held in the pulp layer 5 was obtained.
  • Test Example 7 Tests were carried out in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 8 and 12 and Comparative Examples 2 and 4. The results are shown in Table 7.
  • Example 12 From the results of the rewet (2 cycles and 3 cycles) and the amount of water retained in Table 7, it can be seen that the water retention of Example 12 exhibits performance superior to that of Comparative Example 4. That is, it can be seen that water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate is decreased, but in Example 12, such a decrease is not observed.
  • the water retention aid of the present invention can obtain desired performance without being limited to the structure of the absorber.
  • Example 13 After spraying a solution obtained by dissolving 10 parts by weight of hydroxypropyl cellulose in 190 parts by weight of ethanol on 100 parts by weight of the granules obtained in Example 2 using a fluid type coating apparatus (manufactured by POWREC) and drying at 40 ° C. By classifying, a water retention aid comprising granules having an average particle diameter of about 500 ⁇ m was produced. Next, an absorbent material and an absorbent body were produced in the same manner as in Example 1 except that the water retention aid obtained here was used as the water retention aid.
  • Test Example 8 Tests were conducted in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 2 and 13 and Comparative Example 2. The results are shown in Table 8.
  • Example 13 is more excellent than that of Comparative Example 2. That is, it can be seen that water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate is decreased, but in Example 13, such a decrease is not observed. Thus, in this invention, even if it uses the water retention adjuvant coated with the cellulose compound, the absorber which has the outstanding water retention can be provided, without a rate of absorption decreasing. The absorption time was indicated as A in Table 8, but the absorption rate of Example 13 was superior to that of Example 2.
  • Example 14 1.875 g of an absorbent material was prepared by mixing 0.36 g of the water retention aid obtained in Example 2 with the same superabsorbent polymer as in Example 1. Next, the absorber was produced according to the procedure shown in FIG. That is, the absorbent layer (1.875 g) composed of the superabsorbent polymer particles 3 and the water retention auxiliary particles 4 is a pulp layer 5 (fluff pulp laminate; (The amount is 50 g / m 2 , the size is 30 cm ⁇ 10 cm, the weight of one sheet is 1.5 g), and then the pulp layer 5 is placed from above as shown in FIG. On top of this, 1.875 g of the superabsorbent polymer was evenly sprinkled as shown in FIG.
  • the laminate 20 is pressed under the conditions of a press pressure of 80 kg / cm 2 , a press temperature of 30 ° C., and a press time of 10 to 15 seconds ⁇ 4 times, as shown in FIG. 9B.
  • the superabsorbent polymer particles 3 constituting the absorbent are held in the pulp layer 5 and the superabsorbent polymer particles 3 and the water retention aid particles 4 constituting the absorbent material in the lower layer are held in the pulp layer 5 (15 g )
  • Example 15 An absorbent material and an absorbent body were produced in the same manner as in Example 14 except that the water retention aid obtained in Example 13 was used.
  • Test Example 9 Tests were conducted in the same manner as in Test Example 1 for the absorbent bodies obtained in Examples 14 and 15 and Comparative Example 2. The results are shown in Table 9.
  • Example 16 8.64 g of an absorbent material was prepared by mixing 0.42 g of the water retention aid obtained in Example 13 with the same superabsorbent polymer as in Example 1. Next, the absorbent material (8.64 g) was divided into three equal parts, and an absorbent body was produced according to the procedure shown in FIG. That is, the absorbent material (2.88 g) obtained by dividing the absorbent material composed of the superabsorbent polymer particles 3 and the water retention aid particles 4 into three equal parts is shown in FIG. 10A (a). Pulp laminate; basis weight 75 g / m 2 , size 30 cm ⁇ 12 cm, weight of one piece 2.7 g), and then sprinkled evenly, as shown in FIG.
  • the laminate 29 is pressed under the conditions of a press pressure of 10 kg / cm 2 , a press temperature of 30 ° C., and a press time of 10 to 15 seconds ⁇ 4 times, so that an absorbent material is obtained as shown in FIG.
  • a press pressure of 10 kg / cm 2 a press temperature of 30 ° C.
  • a press time of 10 to 15 seconds ⁇ 4 times a press time of 10 to 15 seconds ⁇ 4 times
  • Comparative Example 5 Absorption in which the superabsorbent polymer particles constituting the absorbent material are held by the water-permeable member in the same manner as in Example 13 except that only 8.64 g of the superabsorbent polymer similar to Example 1 was used as the absorbent. The body (about 14.04 g) was obtained.
  • Test Example 10 The absorbers obtained in Example 13 and Comparative Example 5 were tested in the same manner as in Test Example 1. The results are shown in Table 10.
  • Example 16 exhibits performance superior to that of Comparative Example 5. That is, it can be seen that water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate decreases, but in Example 16, such a decrease is not observed. Thus, in the present invention, it is possible to provide an absorbent body having excellent water retention without reducing the absorption rate even when the configuration of the absorbent body is changed.
  • Example 17 7.56 g of an absorbent material was prepared by mixing 0.36 g of the water retention aid obtained in Example 2 with the same superabsorbent polymer as in Example 1. Next, the absorbent material (7.56 g) was divided into four equal parts to produce absorbent articles. That is, the absorbent material (1.89 g) obtained by dividing the absorbent material composed of the superabsorbent polymer particles 3 and the water retention aid particles 4 into four equal parts according to the procedure shown in FIG. After evenly sprinkling on a certain pulp layer 5 (fluff pulp laminate; basis weight 50 g / m 2 , size 30 cm ⁇ 10 cm, weight of 1.5 g per sheet), as shown in FIG. A pulp layer 5 was placed. After repeating the steps shown in FIGS.
  • a liquid-permeable sheet 35 (through-air nonwoven fabric; basis weight 30 g / m 2 , size 32 cm ⁇ 12 cm, weight of one sheet of about 1.15 g) is formed on the laminate 32, and a liquid-impermeable sheet 36 (ventilated) Film; basis weight 18 g / m 2 , size 32 cm ⁇ 12 cm, weight of one sheet of about 0.69 g), hot melt adhesive was applied in a spiral shape and fixed.
  • the superabsorbent polymer particles 3 and the water retention aid constituting the absorbent material covered with the core wrap 34 between the liquid permeable sheet 35 and the liquid impermeable sheet 36.
  • Absorbent article 33 (about 17.86 g) containing an absorbent body in which particles 4 were held in pulp layer 5 was obtained.
  • Comparative Example 6 Absorption covered with a core wrap between a liquid-permeable sheet and a liquid-impermeable sheet by the same method as in Example 17 except that only 7.56 g of the same superabsorbent polymer as in Example 17 was used as the absorbent.
  • An absorbent article (about 17.86 g) including an absorbent body in which the superabsorbent polymer particles and the water retention aid particles constituting the material were held by the water permeable member was obtained.
  • Test Example 11 The absorbent articles obtained in Example 17 and Comparative Example 6 were tested in the same manner as in Test Example 1. The results are shown in Table 11.
  • Example 17 expresses performance superior to that of Comparative Example 6. That is, it can be seen that water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate is decreased, but in Example 17, such a decrease is not observed. Thus, in this invention, it becomes possible to provide the absorbent article which has the outstanding water retention, without reducing an absorption rate by using the water retention aid containing a polysaccharide and a cellulose compound. .
  • Example 18 1.86 g of an absorbent material was prepared by mixing 0.36 g of the water retention aid obtained in Example 2 with the same superabsorbent polymer as in Example 1. Next, an absorbent article was produced. That is, according to the procedure shown in FIG. 8, the absorbent material (1.86 g) composed of the superabsorbent polymer particles 3 and the water retention aid particles 4 is converted into a pulp layer which is a water permeable member as shown in FIG. 5 (fluff pulp laminate; basis weight 50 g / m 2 , size 30 cm ⁇ 10 cm, weight 1.5 g of one piece) and then sprinkled on the pulp layer 5 from above as shown in FIG. I put.
  • a liquid-permeable sheet 35 (through-air nonwoven fabric; basis weight 30 g / m 2 , size 32 cm ⁇ 12 cm, weight of one sheet of about 1.15 g) is formed on the laminate 38, and a liquid-impermeable sheet 36 (ventilated) Film; basis weight 18 g / m 2 , size 32 cm ⁇ 12 cm, weight of one sheet of about 0.69 g), hot melt adhesive was applied in a spiral shape and fixed.
  • the superabsorbent polymer particles 3 constituting the absorbent covered with the core wrap 34 are formed between the liquid-permeable sheet 35 and the liquid-impermeable sheet 36.
  • An absorbent article 39 (about 17.86 g) including an absorbent body in which the superabsorbent polymer particles 3 and the water retention aid particles 4 constituting the absorbent in the lower layer and held in the lower layer 5 are held in the pulp layer 5 is obtained. It was.
  • Test Example 12 The absorbent articles obtained in Example 18 and Comparative Example 6 were tested in the same manner as in Test Example 1. The results are shown in Table 12.
  • Example 18 is significantly better than that of Comparative Example 6. That is, it can be seen that water retention is improved immediately after absorbing a large amount of liquid and when time has elapsed after absorption. In general, when the water retention is improved, the absorption rate is decreased, but in Example 18, such a decrease is not observed. Thus, in this invention, even if it introduce

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Abstract

L'invention concerne un adjuvant de rétention d'eau qui montre une rétention d'eau supérieure tout en limitant une réduction marquée de la vitesse d'absorption. L'invention concerne un adjuvant de rétention d'eau qui est contenu dans des absorbants pour l'absorption de liquides, l'adjuvant de rétention d'eau comprenant des polysaccharides (à l'exclusion des composés cellulosiques) et des composés cellulosiques.
PCT/JP2012/058686 2011-03-30 2012-03-30 Adjuvant de rétention d'eau, et matériau absorbant, absorbant et objet absorbant le comprenant WO2012133824A1 (fr)

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JP2013507815A JP6113069B2 (ja) 2011-03-30 2012-03-30 保水助剤ならびにそれを含む吸収材、吸収体及び吸収性物品

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JP2014136797A (ja) * 2013-01-18 2014-07-28 Uni Charm Corp 保水助剤ならびにそれを含む吸収材、吸収体及び吸収性物品
FR3016878A1 (fr) * 2014-01-30 2015-07-31 Liliz Polymere super absorbant modifie renfermant un engrais
WO2018070250A1 (fr) * 2016-10-12 2018-04-19 東レ株式会社 Film

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JPH1036162A (ja) * 1996-07-25 1998-02-10 Shin Etsu Chem Co Ltd 石膏系組成物
JPH11130905A (ja) * 1997-10-28 1999-05-18 Mitsui Chem Inc セルロース系組成物、成形物および成形方法
JP2000248451A (ja) * 1998-12-28 2000-09-12 Pigeon Corp 不織布およびその用途
JP2003135030A (ja) * 2001-11-02 2003-05-13 Asahi Kasei Corp 微細セルロース含有複合体を配合してなる食品組成物
JP2007525568A (ja) * 2003-10-31 2007-09-06 ビーエーエスエフ　アクチェンゲゼルシャフト 血液及び／又は体液を吸収するヒドロゲル
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014136797A (ja) * 2013-01-18 2014-07-28 Uni Charm Corp 保水助剤ならびにそれを含む吸収材、吸収体及び吸収性物品
FR3016878A1 (fr) * 2014-01-30 2015-07-31 Liliz Polymere super absorbant modifie renfermant un engrais
WO2015114273A1 (fr) * 2014-01-30 2015-08-06 Liliz Polymère super absorbant modifié renfermant un engrais
WO2018070250A1 (fr) * 2016-10-12 2018-04-19 東レ株式会社 Film

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