CN116059428B - Antibacterial night absorbent core with red buttocks prevention function and super-large absorption capacity and application thereof - Google Patents
Antibacterial night absorbent core with red buttocks prevention function and super-large absorption capacity and application thereof Download PDFInfo
- Publication number
- CN116059428B CN116059428B CN202310032287.5A CN202310032287A CN116059428B CN 116059428 B CN116059428 B CN 116059428B CN 202310032287 A CN202310032287 A CN 202310032287A CN 116059428 B CN116059428 B CN 116059428B
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- CN
- China
- Prior art keywords
- acid
- water
- absorbent core
- absorbent
- absorbent resin
- Prior art date
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- 239000002250 absorbent Substances 0.000 title claims abstract description 96
- 230000002745 absorbent Effects 0.000 title claims abstract description 74
- 238000010521 absorption reaction Methods 0.000 title abstract description 39
- 230000000844 anti-bacterial effect Effects 0.000 title abstract description 24
- 210000001217 buttock Anatomy 0.000 title abstract description 11
- 230000002265 prevention Effects 0.000 title abstract description 4
- 239000011347 resin Substances 0.000 claims abstract description 54
- 229920005989 resin Polymers 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 22
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 22
- 239000002738 chelating agent Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 21
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 21
- DEWLEGDTCGBNGU-UHFFFAOYSA-N 1,3-dichloropropan-2-ol Chemical compound ClCC(O)CCl DEWLEGDTCGBNGU-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 239000003999 initiator Substances 0.000 claims description 16
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 12
- PUGOMSLRUSTQGV-UHFFFAOYSA-N 2,3-di(prop-2-enoyloxy)propyl prop-2-enoate Chemical compound C=CC(=O)OCC(OC(=O)C=C)COC(=O)C=C PUGOMSLRUSTQGV-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 239000003960 organic solvent Substances 0.000 claims description 11
- 239000012966 redox initiator Substances 0.000 claims description 11
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000003431 cross linking reagent Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 8
- 239000012295 chemical reaction liquid Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000006386 neutralization reaction Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims description 6
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 5
- RUSUZAGBORAKPY-UHFFFAOYSA-N acetic acid;n'-[2-(2-aminoethylamino)ethyl]ethane-1,2-diamine Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCNCCNCCN RUSUZAGBORAKPY-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229960002089 ferrous chloride Drugs 0.000 claims description 5
- 239000011790 ferrous sulphate Substances 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- 229960003330 pentetic acid Drugs 0.000 claims description 5
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 claims description 5
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 4
- 235000010265 sodium sulphite Nutrition 0.000 claims description 4
- GIXFALHDORQSOQ-UHFFFAOYSA-N 2,4,6,8-tetrahydroxy-1,3,5,7,2$l^{5},4$l^{5},6$l^{5},8$l^{5}-tetraoxatetraphosphocane 2,4,6,8-tetraoxide Chemical compound OP1(=O)OP(O)(=O)OP(O)(=O)OP(O)(=O)O1 GIXFALHDORQSOQ-UHFFFAOYSA-N 0.000 claims description 3
- XNCSCQSQSGDGES-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]propyl-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)C(C)CN(CC(O)=O)CC(O)=O XNCSCQSQSGDGES-UHFFFAOYSA-N 0.000 claims description 3
- WYMDDFRYORANCC-UHFFFAOYSA-N 2-[[3-[bis(carboxymethyl)amino]-2-hydroxypropyl]-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)CN(CC(O)=O)CC(O)=O WYMDDFRYORANCC-UHFFFAOYSA-N 0.000 claims description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 3
- YDHWWBZFRZWVHO-UHFFFAOYSA-N [hydroxy(phosphonooxy)phosphoryl] phosphono hydrogen phosphate Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(=O)OP(O)(O)=O YDHWWBZFRZWVHO-UHFFFAOYSA-N 0.000 claims description 3
- JHIDGGPPGFZMES-UHFFFAOYSA-N acetic acid;n-(2-aminoethyl)hydroxylamine Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.NCCNO JHIDGGPPGFZMES-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 3
- AZSFNUJOCKMOGB-UHFFFAOYSA-N cyclotriphosphoric acid Chemical compound OP1(=O)OP(O)(=O)OP(O)(=O)O1 AZSFNUJOCKMOGB-UHFFFAOYSA-N 0.000 claims description 3
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 3
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 claims description 3
- ZZGUZQXLSHSYMH-UHFFFAOYSA-N ethane-1,2-diamine;propanoic acid Chemical compound NCCN.CCC(O)=O.CCC(O)=O ZZGUZQXLSHSYMH-UHFFFAOYSA-N 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical compound OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 3
- 229920000137 polyphosphoric acid Polymers 0.000 claims description 3
- 229940005657 pyrophosphoric acid Drugs 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 3
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 23
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
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- 230000000052 comparative effect Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 6
- 229910052700 potassium Inorganic materials 0.000 description 6
- 239000011591 potassium Substances 0.000 description 6
- 239000002504 physiological saline solution Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- FUWUEFKEXZQKKA-UHFFFAOYSA-N beta-thujaplicin Chemical compound CC(C)C=1C=CC=C(O)C(=O)C=1 FUWUEFKEXZQKKA-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 4
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- 241000894006 Bacteria Species 0.000 description 3
- 229920002101 Chitin Polymers 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229920001661 Chitosan Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000006136 alcoholysis reaction Methods 0.000 description 2
- TUFYVOCKVJOUIR-UHFFFAOYSA-N alpha-Thujaplicin Natural products CC(C)C=1C=CC=CC(=O)C=1O TUFYVOCKVJOUIR-UHFFFAOYSA-N 0.000 description 2
- 229940126575 aminoglycoside Drugs 0.000 description 2
- 239000004599 antimicrobial Substances 0.000 description 2
- UFHBHNRBFWFTSP-UHFFFAOYSA-L disodium hydrogen peroxide sulfite Chemical compound [Na+].[Na+].OO.[O-]S([O-])=O UFHBHNRBFWFTSP-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
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- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 1
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 description 1
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Classifications
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F285/00—Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
-
- 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
- A61F2013/15008—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use
- A61F2013/1513—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use for anal discharge
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- A—HUMAN NECESSITIES
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- 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
- A61F2013/15008—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use
- A61F2013/15146—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use for urine collection
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- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/530489—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being randomly mixed in with other material
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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
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/5307—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the quantity or ratio of superabsorbent material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
- A61F2013/530715—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the acquisition rate
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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
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
- A61F2013/530737—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the absorbent capacity
Abstract
The invention relates to an antibacterial night absorbent core with super-large absorption capacity and an application thereof, wherein the antibacterial night absorbent core has a red buttock prevention function. The absorbent core comprises a top layer, a middle layer and a bottom layer which are permeable to liquid in sequence from top to bottom, wherein the middle layer is loaded with water absorbent resin with super-large absorption capacity, rapid absorption capacity, high liquid passing rate and low rewet amount, and natural antibacterial agent is added. After being applied to an absorbent core, the absorbent product provided by the invention has super-large absorption capacity and excellent antibacterial property, is particularly suitable for being used under the condition that the absorbent product cannot be replaced in time at night, and can effectively solve the problem of liquid leakage and red buttocks phenomenon of the absorbent product.
Description
Technical Field
The invention relates to the field of sanitary products, in particular to an antibacterial night absorbent core with super-large absorption capacity and an application thereof, wherein the antibacterial night absorbent core has a red buttock prevention function.
Background
Disposable absorbent articles are articles used to absorb and contain bodily waste to prevent it from soiling the body of the wearer, clothing, or other objects with which the wearer comes into contact, including sanitary napkins, diapers, pads, adult incontinence articles, and the like, commonly found in everyday life. In recent years, the number of disposable absorbent articles used has drastically increased with the improvement of the living standard and the change of the living style of people. For such products, manufacturers have been working on better technical treatments in terms of comfort, leakage protection, hygiene, health performance to meet the increasing consumer demand.
The core of the absorbent article is an absorbent core which uses both fluid-guiding and wicking to rapidly spread the excreta, such as urine, throughout the absorbent core and then be rapidly absorbed and locked by the absorbent material and made non-reverse osmosis. The liquid absorption amount and the absorption speed of the absorption core body directly influence the quality and the service time of the paper diaper.
However, it was found in the investigation that the use of the baby diaper still had problems of "red buttocks", leakage of urine, and the like. The main reasons for the generation of the red buttocks are that the absorption rate of the absorption core body is not fast enough, the absorption multiplying power is not high enough and the rewet amount is too large, so that the surface layer of the paper diaper is not fresh any more, the skin can be excessively hydrated under the condition of excessive moisture for a long time, the skin horny layer can be excessively absorbed, the barrier function of the skin is weakened, and wrinkled skin is generated; in addition, the super absorbent resin in the absorption core body generates gel after absorbing liquid to cause blockage, so that the air permeability of the paper diaper is reduced. Under the condition of night use, the used paper diaper can not be replaced in time, so that the problem of red buttocks is aggravated, and under the condition of not being replaced for a long time, excrement such as urine and the like is easy to grow bacteria, so that the health problem is caused. However, for the antibacterial function of the absorbent article, an antibacterial agent is generally added to the surface layer, but since the antibacterial material is directly contacted with the skin, the long-term direct contact of the antibacterial material is unfavorable to the health of the human body; the other is to introduce additional antimicrobial agent in the gap between the absorbent material of the absorbent core and the top and bottom layers, but there is also a risk of leakage of the antimicrobial agent without fixation. The introduction of an antibacterial agent into an absorbent material, particularly a water absorbent resin, has been less studied because the introduction of an antibacterial agent may deteriorate the performance of the water absorbent resin. Since excretions such as urine are mainly stored in the absorbent material, the absorbent material having antibacterial properties contributes more to the improvement of the overall antibacterial properties of the absorbent article. Therefore, there is a need to provide more absorbent cores with super-large absorption capacity and excellent antibacterial properties to meet the demands of night use.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an antibacterial absorbent core with super-large absorption capacity, and the absorbent core of the invention uses water-absorbent resin with super-large absorption capacity and rapid absorption rate as a water-absorbing material and adds a natural antibacterial agent, so that the invention reduces the red buttocks phenomenon and simultaneously provides excellent antibacterial effect, and is particularly suitable for being used at night.
The absorbent core of the present invention comprises, in order from top to bottom: a liquid permeable top layer, a middle layer, and a bottom layer;
the middle layer comprises water-absorbent resin particles, wherein the water-absorbent resin is sodium polyacrylate copolymerized maleic anhydride grafted polyvinyl alcohol, and adopts glycerol triacrylate and 1, 3-dichloro isopropanol as cross-linking agents, and natural antibacterial agents are added.
In a preferred embodiment of the present invention, the top and bottom layers may be one or more of woven fabrics, nonwoven fabrics, dust free papers, and the like.
In a preferred embodiment of the present invention, the intermediate layer comprises water absorbent resin particles and a carrier for supporting the water absorbent resin particles, the carrier comprising one or more of fluff pulp, porous nonwoven material, porous woven material, tissue layer.
In a preferred embodiment of the present invention, the water absorbent resin particles are present in the absorbent core in an amount of more than 40%, preferably more than 50%, or more than 60%, more than 70%, most preferably more than 80%.
In a preferred embodiment of the present invention, the water absorbent resin is prepared by the following method:
adding a certain amount of acrylic acid into a proper amount of water, cooling to 0-10 ℃, adding sodium hydroxide solution to neutralize to a certain degree of neutralization, then adding a certain amount of maleic anhydride grafted polyvinyl alcohol, and stirring to completely dissolve; adding a certain amount of redox initiator, chelating agent and natural antibacterial agent into the mixture under stirring in inert atmosphere, dissolving crosslinking agent glycerol triacrylate and 1, 3-dichloro isopropanol into an organic solvent, dripping the crosslinking agent glycerol triacrylate and the 1, 3-dichloro isopropanol into the solution, uniformly stirring, stirring at a constant temperature of between 70 and 85 ℃ for reacting for a period of time, standing to obtain milky gel, and drying, crushing and sieving the milky gel under vacuum to obtain the water-absorbent resin.
In one embodiment, the concentration of acrylic acid in the reaction solution is 30 to 40%, preferably 30 to 35%.
In one embodiment, the concentration of sodium hydroxide solution is 20 to 35%, preferably 25 to 30%.
In one embodiment, the degree of neutralization of the acrylic acid is from 70 to 85%, preferably from 75 to 80%.
In one embodiment, the concentration of maleic anhydride grafted polyvinyl alcohol in the reaction solution is 3-10%, specifically 3%, 5% and 10%; it is more preferably 5 to 10%. The mass ratio of the polyvinyl alcohol to the maleic anhydride in the maleic anhydride grafted polyvinyl alcohol is 100:10-25.
In the invention, the maleic anhydride grafted polyvinyl alcohol can be prepared by the following method:
and (3) under the nitrogen atmosphere, adding polyvinyl alcohol and maleic anhydride into the dried organic solvent according to the mass ratio of 100:10-25, stirring and reacting at 60-100 ℃, cooling, adding acetone for precipitation, filtering and collecting the precipitate, washing with acetone, and drying to obtain the maleic anhydride grafted polyvinyl alcohol.
Preferably, the polymerization degree of the polyvinyl alcohol is 300 to 2000, preferably 500 to 1000; the alcoholysis degree is 87-89%.
Preferably, the mass ratio of polyvinyl alcohol to maleic anhydride is 100:12 to 18, more preferably 100:15. The organic solvent is selected from one or more of dimethyl sulfoxide and dimethylformamide; the reaction temperature is 70-90 ℃.
In one embodiment, the oxidation initiator in the redox initiator is selected from one or more of hydrogen peroxide, di-tert-butyl peroxide, tert-butyl hydroperoxide, potassium persulfate and ammonium persulfate, and the reduction initiator is selected from one or more of sodium bisulfite, sodium sulfite, sodium thiosulfate, ferrous sulfate, ferrous chloride and organic amine. Preferably, the redox initiator may be, for example, ammonium persulfate-sodium hydrogen sulfite, ammonium persulfate-sodium sulfite, potassium persulfate-sodium hydrogen sulfite, potassium persulfate-sodium sulfite, hydrogen peroxide-sodium hydrogen sulfite, hydrogen peroxide-sodium sulfite, hydrogen peroxide-ferrous sulfate, hydrogen peroxide-ferrous chloride, potassium persulfate-ethylenediamine, or the like.
In one embodiment, the ratio of the amount of oxidation initiator to reduction initiator in the redox initiator is 1:1.0 to 3.0, preferably 1:1.0, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2.0, 1:2.2, 1:2.4, 1:2.6, 1:2.8, 1:3.0. further, it is preferably 1:1.2 to 2.0. The concentration of the initiator in the reaction solution is 0.20 to 1.0%, preferably 0.20%, 0.3%, 0.40%, 0.5%, 0.60%, 0.7%, 0.80%, 0.90%, 1.0%; further, it is preferably 0.4 to 0.8%.
In one embodiment, the chelating agent is selected from the group consisting of aminocarboxylic acid chelating agents of iminodiacetic acid, hydroxyethyiiminodiacetic acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid, diethylenetriamine pentaacetic acid, triethylenetetramine hexaacetic acid, diaminopropanol tetraacetic acid, ethylenediamine dipropionic acid, hydroxyethylenediamine triacetic acid, propylenediamine tetraacetic acid, and salts thereof; or a polyphosphoric acid chelating agent selected from the group consisting of pyrophosphoric acid, tripolyphosphoric acid, tetraphosphoric acid, trimetaphosphoric acid, tetrametaphosphoric acid, and salts thereof. Preferably, the chelating agent is preferably an aminocarboxylic acid based chelating agent, in particular ethylenediamine tetraacetic acid, diethylenetriamine pentaacetic acid, triethylenetetramine hexaacetic acid and salts thereof, in particular sodium salts. The addition of the chelating agent helps to eliminate the influence of impurities and improve the polymerization stability. The concentration of the chelating agent in the reaction solution is 0.05% to 0.5%, preferably 0.1% to 0.2%.
In one embodiment, the concentration of the triglyceride in the reaction solution is 0.02 to 0.1%, specifically 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.10%; more preferably 0.03 to 0.1%.
In one embodiment, the concentration of 1, 3-dichloroisopropyl alcohol in the reaction solution is 0.03 to 0.3%, specifically 0.03%, 0.05%, 0.08%, 0.10%, 0.15%, 0.20%; more preferably 0.05 to 0.2%.
In one embodiment, the ratio of glycerol triacrylate to 1, 3-dichloroisopropanol is 1:1.2 to 3, preferably 1:1.5 to 2.5, more preferably 1:1.6 to 2.0.
In one embodiment, the natural antibacterial agent is selected from one or more of chitin, chitosan, hinokitiol, aminoglycoside. The concentration of the antibacterial agent in the reaction solution may be 0.01 to 1%, preferably 0.1 to 0.2%. Under the condition that the antibacterial requirement can be met, the dosage of the antibacterial agent is not excessive, and the influence on the performance of the super absorbent resin is avoided.
Preferably, the organic solvent used for dissolving the triglyceride and the 1, 3-dichloroisopropyl alcohol is selected from one or more of methanol and ethanol. The introduction of methanol and ethanol uses molecules in a contracted state, so that the mutual entanglement and physical crosslinking among polymer molecules are reduced, and the crosslinking in the water-absorbent resin is mainly generated by a crosslinking agent, so that the water-absorbent resin has a proper crosslinking network structure; the resin has higher volatility during drying, is easy to form a porous structure in gel resin, increases the liquid absorption rate and liquid absorption capacity of the resin, and reduces the rewet property of the resin. The mass ratio of water to organic solvent in the reaction liquid can be 2-5: 1, preferably 3 to 4:1, and preferably 3.5 to 4:1.
preferably, the reaction temperature is 70 to 80 ℃.
The particle diameter of the water-absorbent resin particles is preferably 150 to 600. Mu.m, more preferably 180 to 500. Mu.m, still more preferably 250 to 380. Mu.m. When the particle diameter of the resin particles is too large, the specific surface area of the particles is small, the liquid absorbing capacity is insufficient, and the particle feeling is too strong; when the particle size of the resin particles is too small, agglomeration phenomenon easily occurs after water absorption, so that the water absorption inside the agglomerated particles is insufficient, the liquid absorption rate and multiplying power are influenced, and the liquid passing rate is reduced.
In a further aspect the invention provides the use of the absorbent core in an absorbent article, such as a baby diaper, adult diaper, sanitary napkin, menstrual pant or the like. Preferably, the absorbent article is used at night.
Accordingly, the present invention may also provide an absorbent article comprising the absorbent core of the present invention. In one embodiment, the absorbent article is selected from one or more of a baby diaper, an adult diaper, a sanitary napkin, a menstrual pant.
The invention also provides a preparation method of the water-absorbent resin, which comprises the following steps:
adding a certain amount of acrylic acid into a proper amount of water, cooling to 0-10 ℃, adding sodium hydroxide solution to neutralize to a certain degree of neutralization, then adding a certain amount of maleic anhydride grafted polyvinyl alcohol, and stirring to completely dissolve; adding a certain amount of redox initiator, chelating agent and natural antibacterial agent into the mixture under stirring in inert atmosphere, dissolving crosslinking agent glycerol triacrylate and 1, 3-dichloro isopropanol into an organic solvent, dripping the crosslinking agent glycerol triacrylate and the 1, 3-dichloro isopropanol into the solution, uniformly stirring, stirring at a constant temperature of between 70 and 85 ℃ for reacting for a period of time, standing to obtain milky gel, and drying, crushing and sieving the milky gel under vacuum to obtain the water-absorbent resin.
In one embodiment, the concentration of acrylic acid in the reaction solution is 30 to 40%, preferably 30 to 35%.
In one embodiment, the concentration of sodium hydroxide solution is 20 to 35%, preferably 25 to 30%.
In one embodiment, the degree of neutralization of the acrylic acid is from 70 to 85%, preferably from 75 to 80%.
In one embodiment, the concentration of maleic anhydride grafted polyvinyl alcohol in the reaction solution is 3-10%, specifically 3%, 5% and 10%; it is more preferably 5 to 10%. The mass ratio of the polyvinyl alcohol to the maleic anhydride in the maleic anhydride grafted polyvinyl alcohol is 100:10-25.
In one embodiment, the oxidation initiator in the redox initiator is selected from one or more of hydrogen peroxide, di-tert-butyl peroxide, tert-butyl hydroperoxide, potassium persulfate and ammonium persulfate, and the reduction initiator is selected from one or more of sodium bisulfite, sodium sulfite, sodium thiosulfate, ferrous sulfate, ferrous chloride and organic amine. Preferably, the redox initiator may be, for example, ammonium persulfate-sodium hydrogen sulfite, ammonium persulfate-sodium sulfite, potassium persulfate-sodium hydrogen sulfite, potassium persulfate-sodium sulfite, hydrogen peroxide-sodium hydrogen sulfite, hydrogen peroxide-sodium sulfite, hydrogen peroxide-ferrous sulfate, hydrogen peroxide-ferrous chloride, potassium persulfate-ethylenediamine, or the like.
In one embodiment, the ratio of the amount of oxidation initiator to reduction initiator in the redox initiator is 1:1.0 to 3.0, preferably 1:1.0, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2.0, 1:2.2, 1:2.4, 1:2.6, 1:2.8, 1:3.0. further, it is preferably 1:1.2 to 2.0. The concentration of the initiator in the reaction solution is 0.20 to 1.0%, preferably 0.20%, 0.3%, 0.40%, 0.5%, 0.60%, 0.7%, 0.80%, 0.90%, 1.0%; further, it is preferably 0.4 to 0.8%.
In one embodiment, the chelating agent is selected from the group consisting of aminocarboxylic acid chelating agents of iminodiacetic acid, hydroxyethyiiminodiacetic acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid, diethylenetriamine pentaacetic acid, triethylenetetramine hexaacetic acid, diaminopropanol tetraacetic acid, ethylenediamine dipropionic acid, hydroxyethylenediamine triacetic acid, propylenediamine tetraacetic acid, and salts thereof; or a polyphosphoric acid chelating agent selected from the group consisting of pyrophosphoric acid, tripolyphosphoric acid, tetraphosphoric acid, trimetaphosphoric acid, tetrametaphosphoric acid, and salts thereof. Preferably, the chelating agent is preferably an aminocarboxylic acid based chelating agent, in particular ethylenediamine tetraacetic acid, diethylenetriamine pentaacetic acid, triethylenetetramine hexaacetic acid and salts thereof, in particular sodium salts. The concentration of the chelating agent in the reaction solution is 0.05% to 0.5%, preferably 0.1% to 0.2%.
In one embodiment, the concentration of the triglyceride in the reaction solution is 0.02 to 0.1%, specifically 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.10%; more preferably 0.03 to 0.1%.
In one embodiment, the concentration of 1, 3-dichloroisopropyl alcohol in the reaction solution is 0.03 to 0.3%, specifically 0.03%, 0.05%, 0.08%, 0.10%, 0.15%, 0.20%; more preferably 0.05 to 0.2%.
In one embodiment, the ratio of glycerol triacrylate to 1, 3-dichloroisopropanol is 1:1.2 to 3, preferably 1:1.5 to 2.5, more preferably 1:1.6 to 2.0.
In one embodiment, the natural antibacterial agent is selected from one or more of chitin, chitosan, hinokitiol, aminoglycoside. The concentration of the antibacterial agent in the reaction solution may be 0.01 to 1%, preferably 0.05 to 0.1%.
Preferably, the organic solvent used for dissolving the triglyceride and the 1, 3-dichloroisopropyl alcohol is selected from one or more of methanol and ethanol. The mass ratio of water to organic solvent in the reaction liquid can be 2-5: 1, preferably 3 to 4:1, and preferably 3.5 to 4:1.
preferably, the reaction temperature is 70 to 80 ℃.
The particle diameter of the water absorbent resin particles is preferably 150 to 600. Mu.m, more preferably 180 to 500. Mu.m, still more preferably 250 to 380. Mu.m.
Finally, the present invention also provides a water absorbent resin obtained according to the preparation method described herein before.
In the present invention, the inert gas is selected from argon or nitrogen.
In the present invention, unless otherwise specified, the parts, proportions, concentrations, etc. are by mass.
Advantageous effects
The invention provides an antibacterial night absorbent core with super-large absorption capacity and a function of preventing red buttocks. The water-absorbent resin in the absorbent core has super-large absorption capacity, rapid absorption capacity, high liquid-passing rate and low rewet; the added natural antibacterial agent has better biocompatibility, is nontoxic and nonirritating, and can endow the water-absorbent resin with excellent antibacterial performance. After being applied to an absorbent core, the absorbent product can have super-large absorption capacity and excellent antibacterial performance, is particularly suitable for being used under the condition that the absorbent product cannot be replaced in time at night, and can effectively solve the problem of liquid leakage and red buttocks phenomenon of the absorbent product.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the present invention.
The experimental methods in the following examples are conventional methods unless otherwise specified. The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications.
Preparation example 1:
and (3) adding polyvinyl alcohol (the polymerization degree is 500, the alcoholysis degree is 88%) and maleic anhydride into a dried dimethyl sulfoxide solvent according to the mass ratio of 100:15 in a nitrogen atmosphere, stirring and reacting for 5 hours at 80 ℃, cooling, adding acetone for precipitation, filtering, collecting the precipitate, washing with acetone, and drying to obtain the maleic anhydride grafted polyvinyl alcohol.
Example 1:
adding a certain amount of acrylic acid into a proper amount of water, carrying out ice water bath to 0-5 ℃, adding 30wt% of sodium hydroxide solution into the water bath, neutralizing to a certain degree of neutralization, stopping, then adding a certain amount of maleic anhydride grafted polyvinyl alcohol, and stirring to completely dissolve; introducing nitrogen for 0.5h, adding a certain amount of initiator potassium persulfate and sodium sulfite into the mixture under stirring, adding chelating agent disodium ethylenediamine tetraacetate and chitin into the mixture, dissolving cross-linking agent triglyceride acrylic ester and 1, 3-dichloro isopropanol into ethanol, dripping the mixture into the solution, stirring the mixture uniformly, stirring the mixture at a constant temperature of 75 ℃ for 30min, standing the mixture to obtain milky gel, drying the milky gel at a temperature of 110 ℃ and a vacuum degree of minus 0.09MPa, crushing the milky gel, screening the milky gel to obtain the water-absorbent resin with a particle size of about 270 mu m.
The reaction conditions for each example and comparative example are shown in table 1 below.
Table 1: reaction conditions of examples and comparative examples
Test example 1: liquid absorption performance test:
the super absorbent resins obtained in the above examples and comparative examples were subjected to a liquid absorption performance test. Wherein, the liquid absorption rate, the pressurized liquid absorption rate (0.3 psi) and the liquid absorption rate test method are according to the national standards of the people's republic of China (high-absorbency resin for paper diapers and sanitary napkins GB/T22875-2018), and the liquid is 0.9 percent physiological saline. In addition, the liquid passing rate and the rewet amount were tested as follows.
Liquid passing rate:
weighing 0.1g of the water absorbent resin finished product, and pouring into a beaker. 100g of physiological saline was added to swell. After 1h, the swollen gel was poured entirely into a cylinder (cylinder inner diameter: 2.4 cm) having a filter screen (pore diameter: 45 μm) at one end. A100 g weight of 2.4cm in diameter was slowly pressed against the gel in the measuring apparatus and allowed to stand for 1 minute. After standing, 100ml of physiological saline was added. And (3) timing for 1 minute, and weighing the physiological saline through the gel to obtain the liquid passing rate of the water absorbent resin.
The rewet amount:
80g of 0.9% physiological saline was poured into a petri dish having a diameter of 9.5cm at 23.+ -. 2 ℃ and 2.00g of the water-absorbent resin was rapidly added and the time was started, and the petri dish was rocked to uniformly disperse the water-absorbent resin particles therein. After 0.5h, 10 precisely weighed pieces of filter paper were placed on top of the gel, and a 1200g weight was pressed into the center of the dish and again timed for 5 minutes. The weight gain of the filter paper is the rewet amount of the water absorbent resin.
The liquid absorption performance test results of the water absorbent resin are shown in the following table 2, which show that the water absorbent resin of the invention has better absorption rate, high normal pressure and pressurized liquid absorption multiplying power, better liquid passing rate and low rewet. Whereas the water absorbent resins of comparative examples 1 to 4 had lower liquid absorption capacity and high rewet amount.
Table 2: performance of Water absorbent resin
| Absorption speed(s) | Absorption capacity (g/g) | Absorption under pressure (g/g) | Liquid passing rate (g/min) | Rewet amount (g/g) | |
| Example 1 | 46 | 132 | 77 | 24.4 | 1.44 |
| Example 2 | 51 | 125 | 75 | 23.2 | 1.27 |
| Example 3 | 39 | 144 | 81 | 22.6 | 1.35 |
| Example 4 | 48 | 151 | 85 | 23.5 | 1.63 |
| Example 5 | 51 | 137 | 71 | 25.3 | 1.07 |
| Example 6 | 49 | 129 | 69 | 24.2 | 0.98 |
| Comparative example 1 | 79 | 74 | 49 | 17.4 | 3.64 |
| Comparative example 2 | 76 | 68 | 45 | 19.8 | 3.22 |
| Comparative example 3 | 73 | 63 | 41 | 23.0 | 2.94 |
| Comparative example 4 | 69 | 71 | 50 | 24.8 | 4.10 |
Test example 2: antibacterial property test
The water absorbent resin was tested for antibacterial properties according to the following method
0.1g of water-absorbent resin is weighed and placed in a sterilization conical flask, 30g of sterilization normal saline is added, and the mixture is stood until the mixture is fully swelled. Adding 0.1mL of the stock solution into a conical flask, oscillating at 37deg.C and 200r/min for 30min, transferring 0.5mL into 4.5mL sterilized normal saline, transferring 0.1mL, plating, counting, repeating for three times, and measuring viable bacteria concentration C of supernatant of the contact solution 2 . The blank sample was treated in the same manner but without the water-absorbent resin, and the viable cell concentration C of the supernatant liquid of the contact liquid was measured 1 。
The bacteriostatic rate of the water-absorbent resin was calculated as follows: antibacterial ratio = (C 1 -C 1 )/C 1 *100％
The results are shown in Table 3 below, which shows that the water-absorbent resin of the present invention has excellent antibacterial properties and is capable of substantially inhibiting the activities of various bacteria and fungi.
Table 3: antibacterial Properties of the Water absorbent resin of the present invention
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and additions may be made to those skilled in the art without departing from the method of the present invention, which modifications and additions are also to be considered as within the scope of the present invention.
Claims (7)
1. An absorbent core comprising, in order from top to bottom: a liquid permeable top layer, a middle layer, and a bottom layer;
wherein the middle layer comprises water-absorbent resin particles, the water-absorbent resin is sodium polyacrylate copolymerized maleic anhydride grafted polyvinyl alcohol, and glycerol triacrylate and 1, 3-dichloro isopropanol are used as cross-linking agents, and natural antibacterial agents are added;
the water-absorbent resin is prepared by the following method:
adding a certain amount of acrylic acid into a proper amount of water, cooling to 0-10 ℃, adding sodium hydroxide solution to neutralize to a certain degree of neutralization, then adding a certain amount of maleic anhydride grafted polyvinyl alcohol, and stirring to completely dissolve; adding a certain amount of redox initiator, chelating agent and natural antibacterial agent into the mixture under stirring in inert atmosphere, dissolving crosslinking agent glycerol triacrylate and 1, 3-dichloro isopropanol into an organic solvent, dripping the crosslinking agent glycerol triacrylate and the 1, 3-dichloro isopropanol into the solution, uniformly stirring, stirring at a constant temperature of 70-85 ℃ for reacting for a period of time, standing to obtain milky gel, and drying, crushing and sieving under vacuum to obtain the water-absorbent resin;
wherein the concentration of acrylic acid in the reaction solution is 30-40%; the neutralization degree of acrylic acid is 70-85%; the concentration of maleic anhydride grafted polyvinyl alcohol in the reaction solution is 3-10%; the mass ratio of the polyvinyl alcohol to the maleic anhydride in the maleic anhydride grafted polyvinyl alcohol is 100:10-25; the concentration of the initiator in the reaction liquid is 0.20-1.0%; the concentration of the chelating agent in the reaction liquid is 0.05% -0.5%; the concentration of the triglyceride in the reaction liquid is 0.02-0.1%; the concentration of the 1, 3-dichloro isopropanol in the reaction liquid is 0.03-0.3%; the ratio of the glycerol triacrylate to the 1, 3-dichloroisopropanol is 1: 1.2-3; the organic solvent used for dissolving the triacrylate and the 1, 3-dichloro isopropanol is selected from ethanol; the mass ratio of water to organic solvent in the reaction liquid is 2-5: 1.
2. the absorbent core of claim 1 wherein the top and bottom layers are one or more of a woven, nonwoven, dust free paper.
3. The absorbent core according to claim 1, wherein the intermediate layer comprises water absorbent resin particles and a carrier for supporting the water absorbent resin particles, the carrier comprising one or more of fluff pulp, porous nonwoven material, porous woven material, tissue layer; the content of the water absorbent resin particles in the absorbent core is more than 40%.
4. The absorbent core according to claim 1, wherein the oxidation initiator in the redox initiator is selected from one or more of hydrogen peroxide, di-tert-butyl peroxide, tert-butyl hydroperoxide, potassium persulfate, ammonium persulfate, and the reduction initiator is selected from one or more of sodium bisulfite, sodium sulfite, sodium thiosulfate, ferrous sulfate, ferrous chloride, and organic amines; the ratio of the oxidation initiator to the reduction initiator in the redox initiator is 1:1.0 to 3.0.
5. The absorbent core according to claim 1, wherein the chelating agent is selected from the group consisting of aminocarboxylic acid chelating agents of iminodiacetic acid, hydroxyethyiiminodiacetic acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid, diethylenetriamine pentaacetic acid, triethylenetetramine hexaacetic acid, diaminopropanol tetraacetic acid, ethylenediamine dipropionic acid, hydroxyethylenediamine triacetic acid, propylenediamine tetraacetic acid and salts thereof; or a polyphosphoric acid chelating agent selected from the group consisting of pyrophosphoric acid, tripolyphosphoric acid, tetraphosphoric acid, trimetaphosphoric acid, tetrametaphosphoric acid, and salts thereof.
6. An absorbent article comprising the absorbent core according to any one of claims 1-5.
7. A water absorbent resin according to any one of claims 1 to 5.
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| WO2022203296A1 (en) * | 2021-03-26 | 2022-09-29 | 주식회사 엘지화학 | Superabsorbent polymer film and absorbent product comprising same |
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| US4117184A (en) * | 1976-06-07 | 1978-09-26 | The Dow Chemical Company | Absorbent films and laminates |
| US4826917A (en) * | 1986-05-19 | 1989-05-02 | Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha | Method of producing highly absorbent resins |
| US6353148B1 (en) * | 1998-06-08 | 2002-03-05 | Bki Holding Corporation | Fracture resistant superabsorbent polymers |
| US6239230B1 (en) * | 1999-09-07 | 2001-05-29 | Bask Aktiengesellschaft | Surface-treated superabsorbent polymer particles |
| WO2001045758A1 (en) * | 1999-12-23 | 2001-06-28 | The Dow Chemical Company | High permeability, low absorption capacity polymers |
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Application publication date: 20230505 Assignee: Lule new material technology (Guangzhou) Co.,Ltd. Assignor: Lule Health Technology Co.,Ltd. Contract record no.: X2023980048690 Denomination of invention: An antibacterial night use absorption core with anti red fart function and super absorption capacity and its application Granted publication date: 20231020 License type: Common License Record date: 20231129 |