CN116942882A - Ultrathin core paper diaper and preparation method thereof - Google Patents
Ultrathin core paper diaper and preparation method thereof Download PDFInfo
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- CN116942882A CN116942882A CN202310933050.4A CN202310933050A CN116942882A CN 116942882 A CN116942882 A CN 116942882A CN 202310933050 A CN202310933050 A CN 202310933050A CN 116942882 A CN116942882 A CN 116942882A
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- sodium polyacrylate
- polyvinyl alcohol
- water
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- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 71
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical class [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 67
- 238000010521 absorption reaction Methods 0.000 claims abstract description 64
- 239000002245 particle Substances 0.000 claims abstract description 64
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 31
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 25
- 239000006229 carbon black Substances 0.000 claims abstract description 23
- 239000004970 Chain extender Substances 0.000 claims abstract description 18
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 10
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 8
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical compound C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- AKCRQHGQIJBRMN-UHFFFAOYSA-N 2-chloroaniline Chemical compound NC1=CC=CC=C1Cl AKCRQHGQIJBRMN-UHFFFAOYSA-N 0.000 claims description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 description 17
- 239000002250 absorbent Substances 0.000 description 16
- 150000003839 salts Chemical class 0.000 description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 230000002745 absorbent Effects 0.000 description 9
- 230000000844 anti-bacterial effect Effects 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000010410 layer Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
- 238000002715 modification method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000004408 titanium dioxide 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
- 229920002125 Sokalan® Polymers 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 229920000058 polyacrylate Polymers 0.000 description 4
- 239000004584 polyacrylic acid Substances 0.000 description 4
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 3
- 210000002700 urine Anatomy 0.000 description 3
- 229910018540 Si C Inorganic materials 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920000867 polyelectrolyte Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- -1 Cl- Chemical class 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 125000003916 ethylene diamine group Chemical group 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
-
- 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
- A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
-
- 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
- A61L15/20—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing organic materials
-
- 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
- A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
-
- 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
- A61L15/425—Porous materials, e.g. foams or sponges
-
- 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
- A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
-
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F261/00—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00
- C08F261/02—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols
- C08F261/04—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
-
- 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
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/404—Biocides, antimicrobial agents, antiseptic agents
Abstract
The application discloses an ultrathin core paper diaper and a preparation method thereof, wherein the ultrathin core paper diaper comprises a water absorption core and water absorption particles; the water absorption particles are uniformly arranged on the water absorption core body, and the water absorption particles are prepared from the following raw materials in parts by weight: 80-120 parts of polyacrylamide; 30-50 parts of modified sodium polyacrylate; 25-45 parts of polyvinyl alcohol; 2-8 parts of chain extender; and (2) a surfactant: 2-8 parts; the modified sodium polyacrylate comprises sodium polyacrylate, trimethylolpropane, ethylene glycol and carbon black. The application has the effect of improving the water absorption rate of the paper diaper.
Description
Technical Field
The application relates to the field of paper diapers, in particular to an ultrathin core paper diaper and a preparation method thereof.
Background
The paper diaper mainly comprises a non-woven fabric surface layer, a diversion layer, an absorption layer and a bottom film, and is not only used as a special product for infants, but also gradually expands in application range, and is also used in the medical and health industries and some special industries.
The paper diaper super absorbent resin is mainly polyacrylic acid (salt) super absorbent resin, and occupies the dominant position in the world super absorbent resin market, and occupies more than 80 percent of the total output of the world SAP; however, the polyacrylic acid type super absorbent resin has the advantages of high water absorption speed, high water absorption multiplying power, good heat resistance and the like compared with other synthetic type super absorbent resins, but the polyacrylic acid (salt) type super absorbent resin belongs to a polyelectrolyte, has poor salt resistance and seriously affects the application performance.
The human body fluid has complex components, such as human urine mainly comprising urea and various inorganic salt ions, such as Cl-, na+, K+, SO42-, and the like. As the super absorbent resin belongs to the polyelectrolyte, various ion components can generate the homoionic effect on the water absorption process, so that the water absorption capacity of the super absorbent resin is seriously affected by urine, the liquid absorption rate of the super absorbent resin is greatly reduced, the absorption performance of the absorption core of the sanitary article on urine is reduced, and the service performance of the sanitary article is affected.
Disclosure of Invention
In order to improve the salt absorption rate of the paper diaper, the application provides an ultrathin core paper diaper and a preparation method thereof.
In a first aspect, the present application provides an ultrathin core paper diaper, which adopts the following technical scheme:
an ultrathin core paper diaper comprises a water-absorbing core body and water-absorbing particles; the water absorption particles are uniformly arranged on the water absorption core body, and the water absorption particles are prepared from the following raw materials in parts by weight: 80-120 parts of polyacrylamide; 30-50 parts of modified sodium polyacrylate; 25-45 parts of polyvinyl alcohol; 2-8 parts of chain extender; and (2) a surfactant: 2-8 parts; the modified sodium polyacrylate comprises sodium polyacrylate, trimethylolpropane, ethylene glycol and carbon black.
Through the technical scheme, polyacrylamide, polyvinyl alcohol and modified sodium polyacrylate are mixed to prepare water-absorbing particles with strong water absorption, the water-absorbing particles are used as water-absorbing layers in paper diaper cores, the thickness of the water-absorbing cores is 5mm, the polyacrylamide, the polyvinyl alcohol and the modified sodium polyacrylate enable the components to contain a large number of hydrophilic groups such as hydroxyl groups, when water molecules are in contact with the water-absorbing particles, the water molecules enter the water-absorbing particles through the functions of diffusion, capillary and surface adsorption, the three water-absorbing particles have good salt absorption effects, and the water-absorbing cores of the paper diapers have high salt absorption efficiency under the condition of thinner thickness; sodium polyacrylate is modified by carbon black and trimethylolpropane, the carbon black has Si-O bond and Si-C bond, and is stably connected with polyvinyl alcohol in a chemical bond form, so that the extension of a molecular chain is promoted, the crosslinking degree is improved, the structural strength of the polyvinyl alcohol is increased, moisture is locked, the moisture is not easy to permeate after the water absorption particles absorb water, the carbon black also has the effect of absorbing peculiar smell, the modified sodium polyacrylate also has the effect of absorbing peculiar smell, and the modified sodium polyacrylate is matched with polyvinyl alcohol and polyacrylamide, so that the prepared water absorption particles have good water absorption and moisture removal performances.
Preferably, the preparation method of the modified sodium polyacrylate comprises the following steps: heating and cooling 40-60 parts by weight of sodium polyacrylate and 80-120 parts by weight of ethylene glycol, adding 10-20 parts by weight of trimethylolpropane and 20-30 parts by weight of carbon black, heating for 1-3 hours, and drying to obtain the modified sodium polyacrylate.
By adopting the technical scheme, the sodium polyacrylate is modified by the method, and the ethylene glycol is a nonionic polar auxiliary agent, so that the sodium polyacrylate is matched with carbon black and trimethylolpropane together, and the salt absorption effect of the modified sodium polyacrylate is greatly improved.
Preferably, the polyvinyl alcohol is modified polyvinyl alcohol, and the preparation method of the modified polyvinyl alcohol comprises the following steps: 10-20 parts by weight of nano titanium dioxide, 5-10 parts by weight of ammonium sulfate and 20-40 parts by weight of water are ultrasonically dissolved, 7-21 parts by weight of polyvinyl alcohol and 3-9 parts by weight of N, N' -methylene bisacrylamide are added, 1-2 parts by weight of initiator are added after stirring for 30-60min, heating reaction is carried out, and the modified polyvinyl alcohol is obtained after washing and drying.
By adopting the technical scheme, the nano titanium dioxide is taken as a core, the N, N' -methylene bisacrylamide cross-linking agent wraps the polyvinyl alcohol on the surface of the nano titanium dioxide to form the composite microsphere, carbon-carbon double bonds in the polyvinyl alcohol react with the nano titanium dioxide, the nano titanium dioxide is grafted with the polyvinyl alcohol, the ammonium sulfate enables the nano titanium dioxide to be uniformly dispersed in the water-absorbing ion component, and meanwhile, the reaction degree of the modified polyvinyl alcohol and other components is controlled, so that the water absorption capacity of the water-absorbing particles is improved.
Preferably, the nano titanium dioxide is pretreated nano titanium dioxide, and the pretreatment method of the nano titanium dioxide comprises the following steps: heating 10-20 parts by weight of nano titanium dioxide and 2-6 parts by weight of silane coupling agent in 20-40 parts by weight of ethanol solution, performing ultrasonic treatment for 30-60min, adjusting the pH to 4-5, washing with absolute ethanol, centrifuging, and drying to obtain the modified nano titanium dioxide.
By adopting the technical scheme, the nano titanium dioxide is pretreated, and has a certain antibacterial effect, so that the antibacterial property of the water-absorbing particles can be improved; the silane coupling agent is mixed with the nano titanium dioxide to change the surface structure of the nano titanium dioxide, and active groups are provided for modifying the polyvinyl alcohol by the nano titanium dioxide; the nano titanium dioxide and the silane coupling agent are mixed and then subjected to ultrasonic treatment, so that the specific surface area of the nano titanium dioxide is increased, the overall strength of the water-absorbing particles is improved, the water absorption effect of the modified polyvinyl alcohol in the water-absorbing particle components is promoted, and the water absorption capacity is improved.
Preferably, the weight ratio of the polyacrylamide to the modified sodium polyacrylate to the modified polyvinyl alcohol is 1: (0.32-0.36): (0.36-0.42).
By adopting the technical scheme, the polyvinyl alcohol is wrapped after the pretreatment of the nano titanium dioxide, the sodium polyacrylate is modified by the carbon black, the antibacterial effect of the nano titanium dioxide and the adsorption peculiar smell effect of the carbon black are matched together, so that the antibacterial effect of the water absorption particles can be further improved; meanwhile, the three components are mixed together to form a porous spongy structure, so that the surface area of the water absorbing particles is increased, and the efficiency of the water absorbing particles is greatly improved.
Preferably, the chain extender comprises one or more of triisopropanolamine, 4' -methylenebis (2-chloroaniline), and ethylenediamine.
By adopting the technical scheme, the molecular chains in the components can be diffused and prolonged by selecting the proper chain extender, bridging is formed between polymer chains, the molecular mass of the water absorbing particles is obviously increased, and the viscosity of the system is improved, so that the formation of the components is promoted.
Preferably, the molecular weight of the polyacrylamide is 600-1200 ten thousand.
Through adopting above-mentioned technical scheme, select the raw materials that use the polyacrylamide of medium molecular weight to be used for preparing the water absorption granule, make polyvinyl alcohol and modified sodium polyacrylate disperse more even, promote the agglomeration of water absorption granule to make water absorption granule have better salt absorption effect.
Preferably, the weight ratio of triisopropanolamine to 4,4' -methylenebis (2-chloroaniline) is (1.5-2): 1.
by adopting the technical scheme, the two chain extenders are matched with each other, so that the reaction of the active hydrogen-containing polymer in the component can be effectively improved, and the formation of the water-absorbing particles is accelerated.
Preferably, the polymerization degree of the sodium polyacrylate is 22000-70000.
By adopting the technical scheme, the sodium polyacrylate with the polymerization degree is selected and matched with polyacrylamide, polyvinyl alcohol and an adaptive chain extender, so that the water-absorbing particles with better salt absorbing effect can be prepared.
In a second aspect, the preparation method of the ultrathin core paper diaper provided by the application adopts the following technical scheme:
the preparation method of the ultrathin core paper diaper comprises the following steps of: the preparation method of the water-absorbing core body comprises the following steps:
uniformly mixing polyacrylamide, modified sodium polyacrylate and polyvinyl alcohol, then adding a chain extender and a surfactant, continuously stirring for 1-2 hours, extruding, granulating, and drying to obtain the water-absorbing particles;
and uniformly spreading the water-absorbing particles on the wrapping layer, coating and bonding, compacting and cutting to obtain the water-absorbing core body.
By adopting the technical scheme, the water-absorbing particles with strong moisture absorption and salt absorption capacity can be prepared by the method, so that the moisture absorption and water absorption capacity of the paper diaper is improved.
In summary, the application has the following beneficial technical effects:
1. according to the application, polyacrylamide, polyvinyl alcohol and modified sodium polyacrylate are mixed to prepare water-absorbing particles with strong water absorption, and the water-absorbing particles are used as a water-absorbing layer in a paper diaper core body, so that a large number of hydrophilic groups such as hydroxyl groups are contained in the components, and when water molecules are contacted with the water-absorbing particles, the water molecules enter the water-absorbing particles through the functions of diffusion, capillary and surface adsorption, and the three water-absorbing particles have good salt-absorbing effects, so that the salt-absorbing efficiency of the paper diaper can be effectively improved; sodium polyacrylate is modified by carbon black and trimethylolpropane, the carbon black has Si-O bond and Si-C bond, and is stably connected with polyvinyl alcohol in a chemical bond form, so that the extension of a molecular chain is promoted, the crosslinking degree is improved, the structural strength of the polyvinyl alcohol is increased, moisture is locked, the moisture is not easy to permeate after the water absorption particles absorb water, the carbon black also has the effect of absorbing peculiar smell, the modified sodium polyacrylate also has the effect of absorbing peculiar smell, and the modified sodium polyacrylate is matched with polyvinyl alcohol and polyacrylamide, so that the prepared water absorption particles have good water absorption and moisture removal performances.
2. The nanometer titanium dioxide is taken as a core, the polyvinyl alcohol is wrapped on the surface of the nanometer titanium dioxide by the N, N' -methylene bisacrylamide crosslinking agent to form composite microspheres, carbon-carbon double bonds in the polyvinyl alcohol react with the nanometer titanium dioxide, the nanometer titanium dioxide is grafted with the polyvinyl alcohol, the ammonium sulfate enables the nanometer titanium dioxide to be uniformly dispersed in the water-absorbing ion component, and meanwhile, the reaction degree of the modified polyvinyl alcohol and other components is controlled, so that the water absorption capacity of the water-absorbing particles is improved.
3. The polyvinyl alcohol is wrapped by the pretreated nano titanium dioxide after being modified, sodium polyacrylate is modified by the carbon black, the antibacterial effect of the nano titanium dioxide and the adsorption peculiar smell effect of the carbon black are improved, and when the polyacrylamide, the polyvinyl alcohol and the modified sodium polyacrylate are matched together, the antibacterial effect of the water absorption particles can be further improved; meanwhile, the three components are mixed together to form a porous spongy structure, so that the surface area of the water absorbing particles is increased, and the efficiency of the water absorbing particles is greatly improved.
Detailed Description
The present application will be described in further detail with reference to examples and comparative examples.
Examples
Example 1
The embodiment of the application provides an ultrathin core paper diaper, which comprises a water absorption core body and water absorption particles, wherein the water absorption particles are uniformly arranged in the water absorption core body, the thickness of the water absorption core body is 5mm, and the preparation method of the water absorption particles comprises the following steps:
8kg of polyacrylamide, 3kg of modified sodium polyacrylate and 2.5kg of polyvinyl alcohol are put into a stirrer, uniformly mixed for 10min at the temperature of 60 ℃, then 0.1kg of ethylenediamine chain extender, 0.1kg of triisopropanolamine chain extender and 0.2kg of sodium dodecyl benzene sulfonate surfactant are added, stirring is continued for 1h, extrusion granulation is carried out through a double screw extruder, and the mixture is put into a fan and dried at the temperature of 80 ℃ to obtain the water-absorbing particles.
The molecular weight of the polyacrylamide is 1800 ten thousand; the polyvinyl alcohol is selected from Xin-shun-chemical 2488.
The modification method of the modified sodium polyacrylate comprises the following steps: heating 4kg of sodium polyacrylate and 8kg of ethylene glycol for 30min under the condition of stirring rate of 200r/min, cooling to room temperature, adding 1kg of trimethylolpropane and 2kg of carbon black, heating for 1h, and drying at 80 ℃ for 6h to obtain the modified sodium polyacrylate.
The degree of polymerization of the ammonium polyacrylate was 1000.
Example 2
An ultrathin core diaper is different from example 1 in that the method for preparing the water-absorbent particles and the raw material consumption are different, and the preparation method of the water-absorbent particles is as follows:
adding 12kg of polyacrylamide, 5kg of modified sodium polyacrylate and 4.5kg of polyvinyl alcohol into a stirrer, uniformly mixing for 10min at the temperature of 60 ℃, adding 0.4kg of triisopropanolamine chain extender, 0.4kg of 4,4' -methylenebis (2-chloroaniline) chain extender and 0.8kg of sodium dodecyl benzene sulfonate surfactant, continuously stirring for 2h, extruding and granulating by a double-screw extruder, and drying at the temperature of 80 ℃ in a fan to obtain the water-absorbing particles.
The molecular weight of the polyacrylamide is 1800 ten thousand; the polyvinyl alcohol is selected from Xin-shun-chemical 2488.
The modification method of the modified sodium polyacrylate comprises the following steps: heating 4kg of sodium polyacrylate and 8kg of ethylene glycol for 30min under the condition of stirring rate of 200r/min, cooling to room temperature, adding 1kg of trimethylolpropane and 2kg of carbon black, heating for 1h, and drying at 80 ℃ for 6h to obtain the modified sodium polyacrylate.
The degree of polymerization of the ammonium polyacrylate was 1000.
Example 3
An ultrathin core diaper is different from example 1 in that the method for preparing the water-absorbent particles and the raw material consumption are different, and the preparation method of the water-absorbent particles is as follows:
10kg of polyacrylamide, 4kg of modified sodium polyacrylate and 3kg of polyvinyl alcohol are put into a stirrer, uniformly mixed for 10min at the temperature of 60 ℃, then 0.25kg of triisopropanolamine, 0.25kg of 4,4' -methylenebis (2-chloroaniline) chain extender and 0.5kg of sodium dodecyl benzene sulfonate surfactant are added, stirring is continued for 2h, extrusion granulation is carried out through a double screw extruder, and the mixture is put into a fan for drying at the temperature of 80 ℃ to obtain the water-absorbing particles.
The molecular weight of the polyacrylamide is 1800 ten thousand; the polyvinyl alcohol is selected from Xin-shun-chemical 2488.
The modification method of the modified sodium polyacrylate comprises the following steps: heating 4kg of sodium polyacrylate and 8kg of ethylene glycol for 30min under the condition of stirring rate of 200r/min, cooling to room temperature, adding 1kg of trimethylolpropane and 2kg of carbon black, heating for 1h, and drying at 80 ℃ for 6h to obtain the modified sodium polyacrylate.
The degree of polymerization of the ammonium polyacrylate was 1000.
Example 4
A method for manufacturing an ultrathin core diaper, which is different from example 3 in that: the modification methods of the modified polyacrylic acid are different, and the modification method of the modified sodium polyacrylate comprises the following steps: 6kg of sodium polyacrylate and 12kg of ethylene glycol are heated for 30min under the condition of stirring rate of 200r/min, then cooled to room temperature, 2kg of trimethylolpropane and 3kg of carbon black are added, and the mixture is heated for 1h, and dried for 6h under the condition of 80 ℃ to obtain the modified sodium polyacrylate.
The degree of polymerization of the ammonium polyacrylate was 1000.
Example 5
A method for manufacturing an ultrathin core diaper, which is different from example 3 in that: the polyvinyl alcohol is replaced by modified polyvinyl alcohol in equal quantity, and the preparation method of the modified polyvinyl alcohol comprises the following steps:
dissolving 10kg of nano titanium dioxide, 5kg of ammonium sulfate and 20kg of water in a water bath kettle, performing ultrasonic treatment for 1h, adding 7kg of polyvinyl alcohol and 3kg of N, N' -methylene bisacrylamide, stirring for 30min under the condition of introducing nitrogen, adding 1kg of ammonium persulfate initiator to initiate for 2h, gradually heating to 60 ℃ to continue the reaction for 4h, repeatedly washing with ethanol for 3 times after the reaction, filtering, and drying for 48h at the temperature of 60 ℃ to obtain the modified polyvinyl alcohol.
Example 6
A method for manufacturing an ultrathin core diaper, which is different from example 3 in that: the polyvinyl alcohol is replaced by modified polyvinyl alcohol in equal quantity, and the preparation method of the modified polyvinyl alcohol comprises the following steps: dissolving 20kg of nano titanium dioxide, 10kg of ammonium sulfate and 40kg of water in a water bath kettle, performing ultrasonic treatment for 1h, adding 21kg of polyvinyl alcohol and 9kg of N, N' -methylene bisacrylamide, stirring for 30min under the condition of introducing nitrogen, adding 1kg of ammonium persulfate initiator to initiate for 2h, gradually heating to 60 ℃ to continue the reaction for 4h, repeatedly washing with ethanol for 3 times after the reaction, filtering, and drying for 48h at the temperature of 60 ℃ to obtain the modified polyvinyl alcohol.
Example 7
The preparation method of the ultrathin core paper diaper is different from example 6 in that in the process of modifying the polyvinyl alcohol, the nano titanium dioxide is pretreated: heating 10kg of nano titanium dioxide and 2kg of silane coupling agent in 20kg of ethanol solution to 50 ℃, performing ultrasonic treatment for 30min, adjusting the pH value to 4, washing with absolute ethanol, centrifuging at a high speed in a centrifuge, and drying at 60 ℃ for 48h to obtain the modified nano titanium dioxide.
Example 8
The preparation method of the ultrathin core paper diaper is different from example 6 in that in the process of modifying the polyvinyl alcohol, the nano titanium dioxide is pretreated: heating 20kg of nano titanium dioxide and 6kg of silane coupling agent in 40kg of ethanol solution to 50 ℃, performing ultrasonic treatment for 30min, adjusting the pH value to 4, washing with absolute ethanol, centrifuging at a high speed in a centrifuge, and drying at 60 ℃ for 48h to obtain the modified nano titanium dioxide.
Example 9
The preparation method of the ultrathin core diaper is different from example 8 in that in the process of preparing the water-absorbent particles, the input amount of polyacrylamide is 10kg, the input amount of modified sodium polyacrylate is 3.2kg, and the input amount of modified polyvinyl alcohol is 3.6kg.
Example 10
The preparation method of the ultrathin core diaper is different from example 8 in that in the process of preparing the water-absorbent particles, the input amount of polyacrylamide is 10kg, the input amount of modified sodium polyacrylate is 3.6kg, and the input amount of modified polyvinyl alcohol is 4.2kg.
Example 11
A method for preparing an ultrathin core paper diaper, which is different from example 10 in that the molecular weight of polyacrylamide is 22000 and the polymerization degree of sodium polyacrylate is 600 ten thousand; the chain extender is triisopropanolamine 0.4kg, and 4,4' -methylenebis (2-chloroaniline) 0.1kg.
Example 12
A method for preparing an ultrathin core paper diaper, which is different from example 10 in that the molecular weight of polyacrylamide is 70000 and the polymerization degree of sodium polyacrylate is 1200 ten thousand; the chain extender is triisopropanolamine 0.3kg, and 4,4' -methylenebis (2-chloroaniline) 0.2kg.
Comparative example
Comparative example 1
A method for producing an ultrathin core diaper, which is different from example 1 in that the equivalent amount of modified sodium polyacrylate is replaced with sodium polyacrylate.
Comparative example 2
A method for preparing an ultrathin core diaper, which is different from example 1 in that the same amount of polyacrylamide is replaced by modified sodium polyacrylate.
Comparative example 3
A method for producing an ultrathin core diaper, which is different from example 1 in that the polyvinyl alcohol is replaced with polyethylene glycol in equal amount.
Comparative example 4
A method for manufacturing an ultrathin core diaper, which is different from example 1 in that: the polyvinyl alcohol was replaced equally with acrylonitrile-vinyl acetate copolymer.
Performance test:
salt absorption times: the water-absorbent particles obtained in examples 1 to 12 and comparative examples 1 to 4 were tested according to GB/T22905-2008 for the water absorption capacity and rewet amount.
Antibacterial effect: the diapers prepared in examples 1 to 12 and comparative examples 1 to 4 were tested for the bacteriostatic effect of staphylococcus aureus according to the standard of GB15979-2002, appendix C4 of hygienic Standard for Disposable hygienic articles.
Air permeability: the diapers produced in examples 1 to 12 of the present application and comparative examples 1 to 4 were tested for air permeability properties with reference to the method for testing air permeability of textiles in the united states ASTM D737-2004 (2012).
According to the data comparison of examples 1-4 and comparative examples 1-4, the application adopts polyacrylamide, polyvinyl alcohol and modified sodium polyacrylate to prepare water-absorbing particles with strong water absorption, and the water-absorbing particles are used as a water-absorbing layer in a paper diaper core, wherein the thickness of the water-absorbing core is 5mm, sodium polyacrylate is modified, ethylene glycol is a nonionic polar auxiliary agent, so that sodium polyacrylate is matched with carbon black and trimethylolpropane together, and the salt absorption effect of the modified sodium polyacrylate is greatly improved.
According to the comparison of the data of the embodiment 3 and the embodiment 5-6, carbon-carbon double bonds in the polyvinyl alcohol react with the nano titanium dioxide, the nano titanium dioxide is grafted with the polyvinyl alcohol, the ammonium sulfate enables the nano titanium dioxide to be uniformly dispersed in the water absorption ion component, and meanwhile, the reaction degree of the modified polyvinyl alcohol and other components is controlled, so that the water absorption capacity of the water absorption particles is improved.
According to the data comparison of examples 6-8, the application pretreats the nano titanium dioxide, improves the overall strength of the water-absorbing particles, promotes the water absorption of the modified polyvinyl alcohol in the water-absorbing particle component, and improves the water absorption.
According to the data comparison of examples 8-10, the pretreated nano titanium dioxide is used for modifying the polyvinyl alcohol and then wrapping the polyvinyl alcohol, the sodium polyacrylate is modified by the carbon black, the antibacterial effect of the nano titanium dioxide and the peculiar smell adsorption effect of the carbon black are improved, and when the polyacrylamide, the polyvinyl alcohol and the modified sodium polyacrylate are matched together, the antibacterial effect of the water absorption particles can be further improved; meanwhile, the three components are mixed together to form a porous spongy structure, so that the surface area of the water absorbing particles is increased, and the efficiency of the water absorbing particles is greatly improved.
According to the data comparison of examples 10-12, the water-absorbing particles with better salt absorbing effect can be prepared by adopting proper polyacrylamide, chain extender and sodium polyacrylate to cooperate together.
The present application is not limited by the specific embodiments, and modifications can be made to the embodiments without creative contribution by those skilled in the art after reading the present specification, but are protected by patent laws within the scope of claims of the present application.
Claims (10)
1. An ultra-thin core panty-shape diapers, its characterized in that: comprises a water absorption core body and water absorption particles; the water absorption particles are uniformly arranged on the water absorption core body, and the water absorption particles are prepared from the following raw materials in parts by weight: 80-120 parts of polyacrylamide; 30-50 parts of modified sodium polyacrylate; 25-45 parts of polyvinyl alcohol; 2-8 parts of chain extender; and (2) a surfactant: 2-8 parts; the modified sodium polyacrylate comprises sodium polyacrylate, trimethylolpropane, ethylene glycol and carbon black.
2. The ultra-thin core diaper according to claim 1, wherein: the preparation method of the modified sodium polyacrylate comprises the following steps: heating and cooling 40-60 parts by weight of sodium polyacrylate and 80-120 parts by weight of ethylene glycol, adding 10-20 parts by weight of trimethylolpropane and 20-30 parts by weight of carbon black, heating for 1-3 hours, and drying to obtain the modified sodium polyacrylate.
3. The ultra-thin core diaper according to claim 1, wherein: the polyvinyl alcohol is modified polyvinyl alcohol, and the preparation method of the modified polyvinyl alcohol comprises the following steps: 10-20 parts by weight of nano titanium dioxide, 5-10 parts by weight of ammonium sulfate and 20-40 parts by weight of water are ultrasonically dissolved, 7-21 parts by weight of polyvinyl alcohol and 3-9 parts by weight of N, N' -methylene bisacrylamide are added, 1-2 parts by weight of initiator are added after stirring for 30-60min, heating reaction is carried out, and the modified polyvinyl alcohol is obtained after washing and drying.
4. The ultra-thin core diaper according to claim 3, wherein: the nano titanium dioxide is pretreated nano titanium dioxide, and the pretreatment method of the nano titanium dioxide comprises the following steps: heating 10-20 parts by weight of nano titanium dioxide and 2-6 parts by weight of silane coupling agent in 20-40 parts by weight of ethanol solution, performing ultrasonic treatment for 30-60min, adjusting the pH to 4-5, washing with absolute ethanol, centrifuging, and drying to obtain the modified nano titanium dioxide.
5. The ultra-thin core diaper according to claim 3, wherein: the weight ratio of the polyacrylamide to the modified sodium polyacrylate to the modified polyvinyl alcohol is 1: (0.32-0.36): (0.36-0.42).
6. The ultra-thin core diaper according to claim 1, wherein: the chain extender comprises one or more of triisopropanolamine, 4' -methylenebis (2-chloroaniline), and ethylenediamine.
7. The ultra-thin core diaper according to claim 1, wherein: the molecular weight of the polyacrylamide is 600-1200 ten thousand.
8. The ultra-thin core diaper according to claim 6, wherein: the weight ratio of triisopropanolamine to 4,4' -methylenebis (2-chloroaniline) is (1.5-2): 1.
9. the ultra-thin core diaper according to claim 1, wherein: the polymerization degree of the sodium polyacrylate is 22000-70000.
10. A preparation method of an ultrathin core paper diaper is characterized by comprising the following steps of: the preparation method for preparing the ultrathin core paper diaper according to any one of claims 1-9, wherein the preparation method of the water-absorbing core comprises the following steps:
uniformly mixing polyacrylamide, modified sodium polyacrylate and polyvinyl alcohol, then adding a chain extender and a surfactant, continuously stirring for 1-2 hours, extruding, granulating, and drying to obtain the water-absorbing particles;
and uniformly spreading the water-absorbing particles on the wrapping layer, coating and bonding, compacting and cutting to obtain the water-absorbing core body.
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