CN110123528B - Paper diaper with excellent water absorption and locking antibacterial performance and processing technology thereof - Google Patents

Paper diaper with excellent water absorption and locking antibacterial performance and processing technology thereof Download PDF

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Publication number
CN110123528B
CN110123528B CN201910348441.3A CN201910348441A CN110123528B CN 110123528 B CN110123528 B CN 110123528B CN 201910348441 A CN201910348441 A CN 201910348441A CN 110123528 B CN110123528 B CN 110123528B
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layer
water
antibacterial
absorbing
absorbent resin
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CN110123528A (en
Inventor
唐伟
金利伟
孔宋华
王旭
陈锴
张春娥
许宾
裘向阳
王剑
鲍益平
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Hangzhou Keai Personal Care Products Co ltd
Zhejiang University of Technology ZJUT
Hangzhou Coco Healthcare Products Co Ltd
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Hangzhou Keai Personal Care Products Co ltd
Zhejiang University of Technology ZJUT
Hangzhou Coco Healthcare Products Co Ltd
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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
    • A61F13/15577—Apparatus or processes for manufacturing
    • 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
    • A61L15/22—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
    • A61L15/44—Medicaments
    • 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
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts 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
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials
    • A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
    • A61L2300/104—Silver, e.g. silver sulfadiazine
    • 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
    • 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
    • A61L2300/60—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a special physical form
    • A61L2300/602—Type of release, e.g. controlled, sustained, slow

Abstract

The invention relates to a processing technology of a paper diaper, which comprises a paper diaper main body, wherein the paper diaper main body is sequentially provided with a surface layer, a flow guide layer, an absorption core layer and a bottom film layer from top to bottom, the absorption core layer sequentially comprises a dust-free paper layer and a high water absorption material layer from bottom to top, and the high water absorption material layer is formed by mixing and processing antibacterial high water absorption resin microspheres and fluff pulp according to the mass ratio of (3-4) to (7-6). The antibacterial high-molecular water-absorbent resin microsphere applied to the paper diaper is improved in a method for synthesizing high-molecular water-absorbent resin by a solution method, and the magnetic ordered mesoporous carbon nanospheres with multiple pore passages, regular pore diameter and large specific surface area are added as carriers, so that the efficiency of polymerization reaction is improved, and the product high-molecular water-absorbent resin microsphere is uniform in property and simple in post-treatment process.

Description

Paper diaper with excellent water absorption and locking antibacterial performance and processing technology thereof
Technical Field
The invention relates to a paper diaper with excellent water absorption and locking antibacterial performance and a processing technology thereof, belonging to the technical field of paper diaper processing.
Background
The paper diaper is a disposable product which can be discarded after being used. The paper diaper mainly comprises a paper diaper main body and blocking pieces longitudinally arranged on two sides of the paper diaper main body respectively, wherein the paper diaper main body comprises a surface layer, an absorption core layer and a bottom film which are sequentially arranged from top to bottom. The core layer is called the heart of the diaper, and the quality of the diaper with different cores is greatly different. The core of the water absorption performance of the core body is the usage amount and the distribution mode of the high polymer water absorption resin SAP, the core body contains a large amount of SAP to ensure the water absorption capacity of the paper diaper, and the whole body expands after water absorption.
The super absorbent resin has large water absorption times and high water retention rate, and is widely applied to the fields of daily life and medical treatment and health care. Superabsorbent polymers can be divided into three major categories based on their source of raw materials: starch-based, cellulose-based, and synthetic polymer-based. The starch raw materials have wide sources, various types and high yield, but the reaction raw materials are very viscous during hydrolysis, and the operation and the control are very difficult. The natural cellulose has wide sources, a plurality of hydroxyl groups on the molecules of the natural cellulose can be compatible with water, and the fibrous substance has a plurality of capillaries, has large surface area and is suitable for being used as a water absorbing material, but the water absorbing capacity of the fibrous substance is limited, and the fibrous substance can meet the requirement of the water absorbing performance after esterification and etherification treatment. The synthetic polymer system has a wide variety of monomers, and the super absorbent resin can be obtained by homopolymerization of the same monomer or copolymerization of a plurality of monomers.
In recent years, the prior art for preparing acrylic acid type super absorbent resin taking acrylic acid as a monomer is disclosed more, the resin has a polyelectrolyte with an ionizing group-COONa and has a slight cross-linked structure, and the preparation method mainly comprises a solution method, an inverse suspension method, an inverse emulsion method and a dispersion polymerization method. The solution method is simple to implement, but the properties of the product cause complex post-treatment procedures and high energy consumption and cost. The resin particles prepared by the reversed phase suspension method have small particle size, do not need to be crushed, but have low purity, thus influencing the industrial application of the resin particles; the particle size of resin particles prepared by an inverse emulsion method is smaller than that prepared by an inverse suspension method, the water absorption performance is reduced due to the excessively small particle size, the phenomenon of dough occurs, the water absorption rate is remarkably reduced, the resin particles are not suitable for cores of diapers, and the maximum water absorption multiple of the resin prepared by a conventional dispersion method is smaller.
In the prior art, various types of high molecular water-absorbing resin exist, and part of the high molecular water-absorbing resin is successfully applied to the core body of the paper diaper, but the high molecular water-absorbing resin still has the following defects: the factors which are crucial to the quality of the paper diaper, such as maximum water absorption times, water absorption rate, water locking effect and prevention of dough phenomenon, are difficult to be balanced. Therefore, the invention provides a novel paper diaper with excellent water absorption and locking antibacterial performance and a processing technology thereof.
Disclosure of Invention
The invention aims to solve the defects that the maximum water absorption multiple, the water absorption rate and the water locking effect of the macromolecular water-absorbent resin in the prior art are overcome, and the important factors of dough phenomenon and antibacterial performance, which are important to the quality of the paper diaper, are difficult to be balanced and considered, and provides a novel paper diaper with excellent water absorption and locking antibacterial performance and a processing technology thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the paper diaper with excellent water-locking and antibacterial performances comprises a paper diaper main body, wherein the paper diaper main body is sequentially provided with a surface layer, a diversion layer, an absorption core layer and a bottom film layer from top to bottom, the absorption core layer sequentially comprises a dust-free paper layer and a high water-absorbing material layer from bottom to top, and the high water-absorbing material layer is prepared by mixing antibacterial high water-absorbing resin microspheres and fluff pulp according to the mass ratio of (3-4): (7-6), and the synthetic method of the antibacterial super absorbent resin microspheres comprises the following steps:
step S1, the magnetic ordered mesoporous carbon nanospheres are subjected to hydrazine group modification treatment, and the conditions of the hydrazine group modification treatment are as follows: adding 1-2g of magnetic ordered mesoporous carbon nanospheres into 80-100ml of PBS buffer solution with pH value of 7.3-7.5, adding 10-20mg of HBA (3, 4-dihydroxy benzaldehyde), 10-20mg of EDC (1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride) and 10-20mg of NHS (N-hydroxysuccinimide), stirring and reacting for 6-8h under the condition of keeping out of the sun, and then carrying out magnetic separation, washing and drying, wherein the particle size is 180nm, the average pore diameter is 4.2-4.8nm, and the magnetic Ms is more than or equal to 9.0 emu/g;
step S2, adding a certain amount of magnetic ordered mesoporous carbon nanospheres and a high molecular dispersant into a certain amount of water, fully and uniformly stirring, then carrying out vacuum and/or ultrasonic-assisted degassing treatment for 1-2h, adding a certain amount of acrylic acid, and uniformly stirring to form a dispersed magnetic ordered mesoporous carbon nanosphere acrylic acid reaction liquid system, wherein the system temperature is controlled at 35-45 ℃;
step S3: adding a certain amount of sodium hydroxide into the system in the step S2, stirring while adding, and controlling the temperature in the reaction process to be 65-75 ℃;
step S4: adding a certain amount of composite cross-linking agent and initiator, controlling the temperature to be 80-90 ℃, and reacting for 2-3h to form semi-finished super absorbent resin colloid, wherein the composite cross-linking agent is a mixture of NMBA and PEGDA;
step S5: and (S4) rinsing the super absorbent resin colloid in a certain amount of solvent for 1-3 times, mixing with a certain amount of nano silver antibacterial agent, drying until the water content is lower than 3%, crushing to a certain particle size, and performing magnetic separation to obtain a super absorbent resin finished product.
The invention is an improvement of the method for synthesizing the high-molecular water-absorbent resin by the solution method, adds the magnetic ordered mesoporous carbon nanospheres with multiple pore canals, regular pore diameter and large specific surface area as carriers, improves the efficiency of polymerization reaction, and has uniform properties and simple post-treatment process of the high-molecular water-absorbent resin microspheres.
As mentioned above, the magnetic ordered mesoporous carbon nanospheres as the carrier have the characteristics of multiple pore passages, regular pore diameter and large specific surface area, on one hand, a large amount of acrylic acid is adsorbed and loaded, and along with the progress of the reaction process, the difference of concentration in the reaction process is partially released, so that the reaction is promoted to be stably maintained at a certain speed, the reaction speed is controllable, the rapid rise of the reaction temperature is avoided, the reaction is also prevented from being uneven, and the product quality is poor. In addition, because of the communication among the pore channels, the polymerization reaction is inevitably bridged among a plurality of pore channels to form a three-dimensional net structure, and the specific surface area and the liquid storage capacity of the microsphere are further improved.
In the later synthesis stage of the invention, the nano-silver antibacterial agent is added, so that the high-efficiency antibacterial performance of the super absorbent resin is realized.
Preferably, the high water absorption material layer takes fluff pulp with a formula amount as a substrate layer, and the antibacterial high water absorption resin microspheres with the formula amount are layered on the substrate layer from bottom to top to form gradient distribution with increased particle size.
Preferably, 10 percent of the high-water-absorption resin microspheres with the formula amount are crushed into materials with the particle size D1 epsilon (50-80 meshes), 60-70 percent of the high-water-absorption resin microspheres are crushed into materials with the particle size D2 epsilon (30-50 meshes), the rest parts are crushed into materials with the particle size D3 being less than or equal to 30 meshes, the materials with the particle sizes D1 and D2 are firstly and uniformly distributed on the substrate layer, the materials are respectively subjected to low-frequency oscillation treatment at 80-120Hz for 5-8min to form a D1 and D2 composite material layer, and then the materials with the particle size D3 are uniformly distributed on the composite material layer.
Preferably, in step S1, the magnetic ordered mesoporous carbon nanosphere is further subjected to amination modification treatment under the following conditions: adding 1-2g of the hydrazine modified magnetic ordered mesoporous carbon nanospheres into 300ml of 200-5 ml of deionized water, adding 20-30ml of silane coupling agent, adjusting the pH to 5.2-5.5, reacting for 1-3h at 50-55 ℃ under an inert atmosphere after full dispersion, and then carrying out magnetic separation, washing and drying.
Preferably, in step S2, the polymeric dispersant is a mixture of water-soluble dextran and water-insoluble dextran, and the mass ratio of the two is (4-6): 1. the dextran is used as macromolecule, intermolecular bridging is formed, particularly water-insoluble colloid is formed, the dextran is used as a carrier of a carrier, the dispersion effect of the magnetic ordered mesoporous carbon nanosphere can be improved, the water-soluble dextran and the water-insoluble coordination effect form the dispersion effect from macroscopic (insoluble macromolecule) and microscopic (water-soluble macromolecule) and improve the system uniformity, and in addition, the antibacterial super absorbent resin microsphere containing the water-soluble dextran also has good water locking performance.
Preferably, the mass ratio of the water, the magnetic ordered mesoporous micro/nanospheres, the polymeric dispersant and the acrylic acid in the step S2 is (100- & lt 120- & gt): (5-7): (2-3): (60-80).
Preferably, the amount of sodium hydroxide added in step S3 is 35-40% by mass of acrylic acid.
Preferably, in the step S4, the addition amount of the composite cross-linking agent is 4-8% of the mass of acrylic acid, and the addition amount of the initiator is 0.5-4% of the mass of acrylic acid.
Preferably, in step S4, the composite cross-linking agent is NMBA (N' N-methylene bisacrylamide) and PEGDA (polyethylene glycol diacrylate) at a mass ratio of 1: (8-9) the initiator is ferric chloride-sodium sulfhydrate. Wherein NMBA can control the uniformity of the product and prevent the formation of dough field, PEGDA can improve the water absorption rate of the product, and the NMBA and the PEGDA act synergistically according to a specific ratio to ensure the maximum water absorption capacity and the superior water absorption rate of the antibacterial super absorbent resin microspheres.
A processing technology of a paper diaper with excellent water absorption and locking antibacterial performance comprises the following steps:
s1: preparing an absorbent core layer;
s2: compounding the absorbing core layer with the diversion layer to enable the lower surface of the diversion layer to be bonded with the upper surface of the absorbing core layer through fixing glue;
s3: the surface layer is covered, after the surface layer is covered on the upper surface of the absorption core layer, two side ends of the surface layer respectively extend to the lower surface of the absorption core layer along two sides of the absorption core layer, so that the two side ends of the surface layer are arranged on the lower surface of the absorption core layer, the lower surface of the surface layer is bonded with the upper surface of the flow guide layer through fixing glue, and the two side ends of the surface layer are bonded with the lower surface of the absorption core layer through fixing glue;
s4: the bottom film layer is bonded, and the upper surface of the bottom film layer is bonded with the lower surface of the absorption core layer;
s5: processing accessories according to a conventional process, and finishing to obtain a finished diaper product with good diversion absorption performance, wherein the accessories comprise longitudinal elastic ribs and magic tapes.
The invention has the beneficial effects that: the antibacterial high water-absorbent resin microspheres adopted by the paper diaper are improved in a method for synthesizing high-molecular water-absorbent resin by a solution method, and the magnetic ordered mesoporous carbon nanospheres with multiple pore passages, regular pore diameters and large specific surface areas are added as carriers, so that the polymerization reaction efficiency is improved, and the high-molecular water-absorbent resin microspheres are uniform in properties and simple in post-treatment process. As mentioned above, the magnetic ordered mesoporous carbon nanospheres as the carrier have the characteristics of multiple pore passages, regular pore diameter and large specific surface area, on one hand, a large amount of acrylic acid is adsorbed and loaded, and along with the progress of the reaction process, the difference of concentration in the reaction process is partially released, so that the reaction is promoted to be stably maintained at a certain speed, the reaction speed is controllable, the rapid rise of the reaction temperature is avoided, the reaction is also prevented from being uneven, and the product quality is poor. In addition, because of the communication among the pore channels, the polymerization reaction is inevitably bridged among a plurality of pore channels to form a three-dimensional net structure, and the specific surface area and the liquid storage capacity of the microsphere are further improved. In addition, the nano silver antibacterial agent is loaded in the microsphere and has a slow-release antibacterial function.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
Example 1:
absorb antibiotic functional performance's of lock water panty-shape diapers, including the panty-shape diapers main part, the panty-shape diapers main part is equipped with top layer, water conservancy diversion layer, absorption core layer and basement membrane layer from the top down in proper order, the absorption core layer is from up including dustless paper layer and super absorbent material layer in proper order down, super absorbent material layer is by antibiotic super absorbent resin microballon and fluff pulp according to mass ratio 3: 7, the high water absorption material layer takes fluff pulp with the formula amount as a substrate layer, and the antibacterial high water absorption resin microspheres with the formula amount are layered on the substrate layer from bottom to top to form gradient distribution with increased particle size;
specifically, 10% of the antibacterial super absorbent resin microspheres are crushed into materials with the particle size of D170-80 meshes, 60% of the antibacterial super absorbent resin microspheres are crushed into materials with the particle size of D240-50 meshes, the rest of the antibacterial super absorbent resin microspheres are crushed into materials with the particle size of D330 meshes, the materials with the particle sizes of D1 and D2 are firstly uniformly distributed on a substrate layer in sequence, the materials are respectively subjected to low-frequency oscillation treatment at 80-90Hz for 8min to form a composite material layer of D1 and D2, and then the materials with the particle size of D3 are uniformly distributed on the composite material layer;
the synthetic method of the antibacterial super absorbent resin microsphere with antibacterial property comprises the following steps:
step S1, the magnetic ordered mesoporous carbon nanospheres are subjected to hydrazine group modification treatment, and the conditions of the hydrazine group modification treatment are as follows: adding 1g of the magnetic ordered mesoporous carbon nanosphere into 80ml of PBS buffer solution with pH7.3, adding 10mg of HBA, 10mg of EDC and 10mg of NHS, stirring and reacting for 6h under the condition of keeping out of the sun, and then performing magnetic separation, washing and drying to obtain the magnetic ordered mesoporous carbon nanosphere with the particle size of 160-170nm, the average pore diameter of 4.2-4.4nm and the magnetic Ms of more than or equal to 9.0 emu/g;
step S2, adding a certain amount of the magnetic ordered mesoporous carbon nanospheres processed in the step S1 and a high molecular dispersant into a certain amount of water, fully and uniformly stirring, then carrying out vacuum and/or ultrasonic-assisted degassing treatment for 1 hour, adding a certain amount of acrylic acid, and uniformly stirring to form a dispersed magnetic ordered mesoporous carbon nanosphere acrylic acid reaction liquid system, wherein the system temperature is controlled to be 35-37 ℃;
step S3: adding a certain amount of sodium hydroxide into the system in the step S2, stirring while adding, and controlling the temperature in the reaction process to be 65-67 ℃;
step S4: adding a certain amount of composite cross-linking agent and initiator, controlling the temperature to be 80-85 ℃, and reacting for 3h to form semi-finished super absorbent resin colloid, wherein the composite cross-linking agent is a mixture of NMBA and PEGDA;
step S5: and (S4) rinsing the super absorbent resin colloid in a certain amount of solvent for 1 time, drying until the water content is lower than 3%, mixing with a certain amount of nano silver antibacterial agent, crushing to a certain particle size, and performing magnetic separation to obtain a super absorbent resin finished product.
Specifically, in step S2, the polymeric dispersant is a mixture of water-soluble glucan and water-insoluble glucan, and the mass ratio of the two is 4: 1.
in the step S2, the mass ratio of the water to the magnetic ordered mesoporous micro/nanospheres to the polymeric dispersant to the acrylic acid is 100: 5: 2: 60.
the amount of sodium hydroxide added in step S3 was 35% by mass of acrylic acid.
The addition amount of the composite cross-linking agent in the step S4 is 4% of the mass of acrylic acid, the addition amount of the initiator is 0.5% of the mass of acrylic acid, and the composite cross-linking agent in the step S4 is NMBA and PEGDA according to the mass ratio of 1: 8 and the initiator is ferric chloride-sodium sulfhydrate.
The processing technology of the paper diaper with excellent water absorption, locking and antibacterial performances in the embodiment 1 comprises the following steps:
s1: the absorbent core layer is prepared by preparing an absorbent core layer,
s2: compounding the absorbing core layer with the flow guide layer and the water locking layer, so that the lower surface of the flow guide layer is bonded with the upper surface of the absorbing core layer through fixing glue, and the upper surface of the water locking layer is bonded with the lower surface of the absorbing core layer through fixing glue;
s3: the surface layer is coated, after the surface layer is covered on the upper surface of the absorption core layer, two side ends of the surface layer respectively extend to the lower surface of the absorption core layer along two sides of the absorption core layer, so that the two side ends of the surface layer are arranged on the lower surface of the absorption core layer, the lower surface of the surface layer is bonded with the upper surface of the flow guide layer through fixing glue, and the two side ends of the surface layer are bonded with the lower surface of the water locking layer through fixing glue;
s4: the bottom film layer is bonded, and the upper surface of the bottom film layer is bonded with the lower surface of the water locking layer;
s5: processing accessories according to a conventional process, and finishing to obtain a finished diaper product with excellent water absorption and locking antibacterial performance, wherein the accessories comprise longitudinal elastic ribs and magic tapes.
Example 2
Absorb antibiotic functional performance's of lock water panty-shape diapers, including the panty-shape diapers main part, the panty-shape diapers main part is equipped with top layer, water conservancy diversion layer, absorption core layer and basement membrane layer from the top down in proper order, the absorption core layer is from up including dustless paper layer and super absorbent material layer in proper order down, its characterized in that, super absorbent material layer is by antibiotic super absorbent resin microballon and fluff pulp according to mass ratio 4: 6, the high water absorption material layer takes fluff pulp with the formula amount as a substrate layer, and the antibacterial high water absorption resin microspheres with the formula amount are layered on the substrate layer from bottom to top to form gradient distribution with increased particle size;
specifically, 10% of the antibacterial super absorbent resin microspheres are crushed into materials with the particle size of D155-60 meshes, 70% of the antibacterial super absorbent resin microspheres are crushed into materials with the particle size of D235-40 meshes, the rest of the antibacterial super absorbent resin microspheres are crushed into materials with the particle size of D325 meshes, the materials with the particle sizes of D1 and D2 are firstly uniformly distributed on a substrate layer in sequence, low-frequency oscillation treatment is respectively carried out at 120Hz for 5min, a composite material layer of D1 and D2 is formed, and then the materials with the particle size of D3 are uniformly distributed on the composite material layer.
The synthetic method of the antibacterial super absorbent resin microspheres with antibacterial performance comprises the following steps:
step S1, the magnetic ordered mesoporous carbon nanospheres are subjected to hydrazine group modification treatment, and the conditions of the hydrazine group modification treatment are as follows: adding 2g of the magnetic ordered mesoporous carbon nanospheres into 100ml of PBS buffer solution with pH7.5, adding 20mg of HBA, 20mg of EDC and 20mg of NHS, stirring for reacting for 8 hours under the condition of keeping out of the sun, and then carrying out magnetic separation, washing and drying, wherein the particle size is 170-180nm, the average pore diameter is 4.6-4.8nm, and the magnetic Ms is more than or equal to 9.0 emu/g;
step S2, adding a certain amount of the magnetic ordered mesoporous carbon nanospheres processed in the step S1 and a high molecular dispersant into a certain amount of water, fully and uniformly stirring, then carrying out vacuum and/or ultrasonic-assisted degassing treatment for 2 hours, adding a certain amount of acrylic acid, and uniformly stirring to form a dispersed magnetic ordered mesoporous carbon nanosphere acrylic acid reaction liquid system, wherein the system temperature is controlled to be 42-45 ℃;
step S3: adding a certain amount of sodium hydroxide into the system in the step S2, stirring while adding, and controlling the temperature in the reaction process to be 72-75 ℃;
step S4: adding a certain amount of composite cross-linking agent and initiator, controlling the temperature to be 86-90 ℃ and reacting for 2h to form semi-finished super absorbent resin colloid, wherein the composite cross-linking agent is a mixture of NMBA and PEGDA;
step S5: and (S4) rinsing the super absorbent resin colloid in a certain amount of solvent for 3 times, drying until the water content is lower than 3%, mixing with a certain amount of nano silver antibacterial agent, crushing to a certain particle size, and performing magnetic separation to obtain a super absorbent resin finished product.
Specifically, in step S1, the magnetic ordered mesoporous carbon nanosphere is further subjected to amination modification treatment under the following conditions: adding 1g of the hydrazino-modified magnetic ordered mesoporous carbon nanospheres into 200ml of deionized water, adding 20ml of silane coupling agent, adjusting the pH to 5.2-5.3, fully dispersing, reacting for 1-1.5h at 50-52 ℃ under an inert atmosphere, and then performing magnetic separation, washing and drying;
in the step S2, the polymer dispersant is a mixture of water-soluble glucan and water-insoluble glucan, and the mass ratio of the two is 6: 1.
in the step S2, the mass ratio of the water to the magnetic ordered mesoporous micro/nanospheres to the polymeric dispersant to the acrylic acid is 120: 7: 3: 80, the adding amount of the sodium hydroxide in the step S3 is 40% of the mass of the acrylic acid.
In the step S4, the addition amount of the composite cross-linking agent is 8% by mass of acrylic acid, and the addition amount of the initiator is 4% by mass of acrylic acid.
The composite cross-linking agent in the step S4 is NMBA and PEGDA according to the mass ratio of 1: 9 and the initiator is ferric chloride-sodium sulfhydrate.
The diaper of example 2 was processed in the same manner as in example 1.
Example 3
Absorb antibiotic functional performance's of lock water panty-shape diapers, including the panty-shape diapers main part, the panty-shape diapers main part is equipped with top layer, water conservancy diversion layer, absorption core layer, lock water layer and basement membrane layer from the top down in proper order, the absorption core layer includes dustless paper layer and super absorbent material layer from bottom to top in proper order, super absorbent material layer is by antibiotic super absorbent resin microballon and fluff pulp according to mass ratio 3: 7, the high water absorption material layer takes fluff pulp with the formula amount as a substrate layer, and the antibacterial high water absorption resin microspheres with the formula amount are layered on the substrate layer from bottom to top to form gradient distribution with increased particle size;
specifically, 30% of the antibacterial super absorbent resin microspheres in the formula amount are crushed into 120-mesh fine materials of 100 meshes, the rest part of the antibacterial super absorbent resin microspheres is crushed into 80-mesh coarse materials, the fine materials are uniformly distributed on a substrate layer, the low-frequency vibration treatment of 80Hz is carried out for 8min to form a fine material layer, and the coarse materials are uniformly distributed on the fine material layer to form a coarse material layer;
the synthetic method of the antibacterial super absorbent resin microspheres with antibacterial performance comprises the following steps:
step S1, the magnetic ordered mesoporous carbon nanospheres are subjected to hydrazine group modification treatment, and the conditions of the hydrazine group modification treatment are as follows: adding 1.5g of the magnetic ordered mesoporous carbon nanospheres into 90ml of PBS buffer solution with pH7.4, adding 15mg of HBA, 15mg of EDC and 15mg of NHS, stirring and reacting for 7h under the condition of keeping out of the sun, and then carrying out magnetic separation, washing and drying to obtain the magnetic ordered mesoporous carbon nanospheres with the particle size of 170-180nm, the average pore diameter of 4.2-4.5nm and the magnetic Ms of more than or equal to 9.0 emu/g;
step S2, adding a certain amount of the magnetic ordered mesoporous carbon nanospheres processed in the step S1 and a high molecular dispersant into a certain amount of water, fully and uniformly stirring, then carrying out vacuum and/or ultrasonic-assisted degassing treatment for 1.5h, adding a certain amount of acrylic acid, and uniformly stirring to form a dispersed magnetic ordered mesoporous carbon nanosphere acrylic acid reaction liquid system, wherein the system temperature is controlled at 40 ℃;
step S3: adding a certain amount of sodium hydroxide into the system in the step S2, stirring while adding, and controlling the temperature in the reaction process to be 70-72 ℃;
step S4: adding a certain amount of composite cross-linking agent and initiator, controlling the temperature to be 85-88 ℃, and reacting for 2.5h to form semi-finished super absorbent resin colloid, wherein the composite cross-linking agent is a mixture of NMBA and PEGDA;
step S5: and (S4) rinsing the super absorbent resin colloid in a certain amount of solvent for 2 times, drying until the water content is lower than 3%, mixing with a certain amount of nano silver antibacterial agent, crushing to a certain particle size, and performing magnetic separation to obtain a super absorbent resin finished product.
Specifically, in step S1, the magnetic ordered mesoporous carbon nanosphere is further subjected to amination modification treatment under the following conditions: 2g of the S1 hydrazino-treated magnetic ordered mesoporous carbon nanospheres are added into 300ml of deionized water, 30ml of silane coupling agent is added, the pH value is adjusted to 5.3-5.5, the magnetic ordered mesoporous carbon nanospheres are fully dispersed and then react for 2-3 hours at 53-55 ℃ under an inert atmosphere environment, and then the magnetic separation, washing and drying are carried out;
in the step S2, the polymer dispersant is a mixture of water-soluble glucan and water-insoluble glucan, and the mass ratio of the water-soluble glucan to the water-insoluble glucan is 5: 1.
in the step S2, the mass ratio of the water to the magnetic ordered mesoporous micro/nanospheres to the polymeric dispersant to the acrylic acid is 110: 6: 3: 50.
the amount of sodium hydroxide added in step S3 was 38% by mass of acrylic acid.
In the step S4, the addition amount of the composite cross-linking agent is 6% of the mass of the acrylic acid, and the addition amount of the initiator is 2.5% of the mass of the acrylic acid.
The composite cross-linking agent in the step S4 is NMBA and PEGDA according to the mass ratio of 2: 17 and the initiator is ferric chloride-sodium sulfhydrate.
The diaper of example 3 was processed in the same manner as in example 1.
Water absorption and salt water absorption test of the antibacterial super absorbent resin microspheres of examples 1 to 3
1. The test method comprises the following steps: the antibacterial super absorbent resin microspheres of examples 1 to 3 were all pulverized to 100 mesh, 0.2g each was put in a nylon test bag, the test bag was put in deionized water, artificial urine, and an aqueous solution of sodium chloride with a mass fraction of 0.9%, and was left at room temperature for a certain time until adsorption equilibrium was reached, the test bag was suspended for 5 to 8min, excess surface water was sufficiently removed, and the water absorption rate or the salt absorption water rate was calculated:
X＝(m2-m1)/m1x is water absorption multiple or saline water absorption multiple or artificial urine absorption multiple, m2Mass of resin after liquid absorption equilibrium, m1Is the mass of dry resin before imbibition.
The test data for examples 1, 2 and 3 are as follows:
example 1 Example 2 Example 3
Water absorption (times) 518 522 533
Artificial urine absorbent 70 72 80
Salt absorption (times) 86 90 93
Acrylic acid monomer content 125ppm 132ppm 110ppm
Water absorption equilibrium time 14.2s 12.5s 8.8s
2. And (3) testing the water locking rate:
weighing a certain amount of super absorbent resin microspheres with saturated absorption, placing the super absorbent resin microspheres in a beaker at room temperature, respectively measuring the mass of the resin and the quality of the beaker after 24h, 48h-, 72h and 144h, and calculating the water locking rate:
and S is m0- (m1-m2)/m0 × 100%, wherein m0 is the initial mass of the saturated water-absorbent resin, m1 is the mass of the saturated water-absorbent resin and the beaker, and m2 is the mass sum of the evaporated water-absorbent resin and the beaker.
The test data for examples 1, 2 and 3 are as follows:
example 1 Example 2 Example 3
Water locking rate (24h) 83.8％ 84.2％ 85.3％
Water locking rate (48h) 60.8％ 60.6％ 62.2％
Water locking rate (72h) 43.2％ 45.1％ 46.8％
Water locking rate (144h) 20.8％ 19.5％ 22.8％
Examples 1-3 diapers with excellent water-absorbing and antibacterial properties were used for moisture absorption tests, and alternatively, commercially available diaper cores of Huawang, bangbao, and curious brands were used for comparative moisture absorption tests. The specific operation is as follows:
1. the test method comprises the following steps:
1.1 absorption speed:
(A) test device and reagent
(1) Balance: precision of 0.01g, 1 stage
(2) About 545g of standard liquid pouring cylinder with the caliber of 2.5cm
(3) Measuring cylinder
(4) Medium-speed chemical qualitative analysis filter paper (GB/T1914) with a plurality of sheets
(5) The standard pressing block is pressed into a block,
Figure GDA0002985640560000111
the weight of the steel is (1.2 +/-0.002) kg (capable of generating 1.5 kPa)
(6) A stopwatch: precision 0.01S, 1 block
(7) Test solutions: 0.9% of a normal saline solution with food coloring (samples were treated and tested under standard atmospheric conditions, i.e., (23 st 1) deg.C and (50 th 2)% r.h)
(8) Straight steel ruler
(2) Operation process
(1) The core body to be tested is laid flat, the dot-dash line at the center of the core body is taken as a liquid adding point, and the sample is 400mm long.
(B) Measuring a plurality of test solutions by using a measuring cylinder (as follows), pouring the test solutions into a liquid guide cylinder to enable the liquid to flow to the surface of the sample, starting timing, ending the timing when the liquid on the surface of the diversion layer disappears, and marking the time as t1 at the moment, namely the absorption speed.
Liquid guiding amount: NB (single drainage 40 ml);
S/M (single drainage 60 ml);
L/XL (single aliquot 80 ml).
1.2 saturated absorption:
(A) test solution and instrument
(1) Testing liquid: 0.9% physiological saline
(2) Balance (precision to 0.1)
(3) Stopwatch
(4)200 mesh nylon bag
(B) Operation process
(1) The wet weight A and the dried weight B of the nylon bag were measured in advance.
(2) And cutting a core to be tested with the length of 0.5m to obtain a weighing record, wherein the record is C.
(3) And (3) putting the core body to be tested into a nylon bag, completely immersing the core body into physiological saline, and immersing for 30 minutes.
(4) After soaking, the mixture is hung on a draining rack for 10 minutes.
(5) After 10 minutes, the weight of the core and the nylon bag as a whole to be tested was weighed and recorded as D. The saturated absorption capacity of the core to be tested is D-a-C.
2. And (3) testing results:
imbibition speed(s) Whether or not to lump Saturated liquid absorption amount (g)
Example 1 19.42 Whether or not 598
Example 2 19.28 Whether or not 583
Example 3 19.10 Whether or not 602
Flower king 22.11 Lump making machine 545
Helps the treasure fit 23.34 Lump making machine 583
Curiosity 22.69 Lump making machine 563
The test data show that the liquid absorption speed of the core body is obviously improved by more than 22.3 percent at most, in addition, the saturated liquid absorption amount is also obviously improved, and the sample to be tested does not lump.
Examples 1-3 antibacterial Properties of diapers Excellent in Water-absorbing and antibacterial Properties
The antibacterial performance of the diaper core is tested by a related method of the standard GB15979-1995, and the antibacterial performance completely meets related biological standards. The bacteriostasis rate to colibacillus and staphylococcus aureus reaches 96 percent, and the bacteriostatic effect can be maintained for 10-12 months at room temperature.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims (10)

1. The paper diaper with excellent water-absorbing and antibacterial performances comprises a paper diaper main body, wherein the paper diaper main body is sequentially provided with a surface layer, a diversion layer, an absorption core layer and a bottom film layer from top to bottom, the absorption core layer sequentially comprises a dust-free paper layer and a high water-absorbing material layer from bottom to top, and the paper diaper is characterized in that the high water-absorbing material layer is prepared from antibacterial high water-absorbing resin microspheres and fluff pulp according to the mass ratio of (3-4): (7-6), and the synthetic method of the antibacterial super absorbent resin microspheres comprises the following steps:
step S1, the magnetic ordered mesoporous carbon nanospheres are subjected to hydrazine group modification treatment, and the conditions of the hydrazine group modification treatment are as follows: adding 1-2g of magnetic ordered mesoporous carbon nanospheres into 80-100ml of PBS buffer solution with pH value of 7.3-7.5, adding 10-20mg of HBA, 10-20mg of EDC and 10-20mg of NHS, stirring and reacting for 6-8h under the condition of keeping out of the sun, and then performing magnetic separation, washing and drying to obtain the magnetic ordered mesoporous carbon nanospheres with the particle size of 160-180nm, the average pore diameter of 4.2-4.8nm and the magnetic Ms of more than or equal to 9.0 emu/g;
step S2: adding a certain amount of magnetic ordered mesoporous carbon nanospheres and a high molecular dispersant into a certain amount of water, fully and uniformly stirring, then carrying out vacuum and/or ultrasonic-assisted degassing treatment for 1-2h, adding a certain amount of acrylic acid, and uniformly stirring to form a dispersed magnetic ordered mesoporous carbon nanosphere acrylic acid reaction liquid system, wherein the temperature of the system is controlled at 35-45 ℃;
step S3: adding a certain amount of sodium hydroxide into the system in the step S2, stirring while adding, and controlling the temperature in the reaction process to be 65-75 ℃;
step S4: adding a certain amount of composite cross-linking agent and initiator, controlling the temperature to be 80-90 ℃, and reacting for 2-3h to form semi-finished super absorbent resin colloid, wherein the composite cross-linking agent is a mixture of NMBA and PEGDA;
step S5: and (S4) rinsing the super absorbent resin colloid in a certain amount of solvent for 1-3 times, mixing with a certain amount of nano silver antibacterial agent, drying until the water content is lower than 3%, crushing to a certain particle size, and performing magnetic separation to obtain the finished antibacterial super absorbent resin microsphere.
2. The diaper according to claim 1, which is excellent in water-absorbing and antibacterial properties, characterized in that: the high water absorption material layer takes fluff pulp with the formula amount as a substrate layer, and the antibacterial high water absorption resin microspheres with the formula amount are layered on the substrate layer from bottom to top to form gradient distribution with increased particle size.
3. The diaper according to claim 2, which is excellent in water-absorbing and antibacterial properties, characterized in that: 10 percent of the antibacterial high water-absorbent resin microspheres are crushed to a particle size D1 epsilon (50-80) mesh material, 60-70 percent of the antibacterial high water-absorbent resin microspheres are crushed to a particle size D2 epsilon (30-50) mesh material, the rest part of the antibacterial high water-absorbent resin microspheres are crushed to a particle size D3 which is less than or equal to 30 mesh material, the particle size D1 and the particle size D2 material are firstly and uniformly distributed on a substrate layer, the substrate layer is respectively subjected to low-frequency oscillation treatment at 80-120Hz for 5-8min to form a D1 and D2 composite material layer, and then the particle size D3 material is uniformly distributed on the composite material layer.
4. The diaper according to claim 1, which is excellent in water-absorbing and antibacterial properties, characterized in that: in step S1, the magnetic ordered mesoporous carbon nanospheres are further subjected to amination modification, and the amination conditions are as follows: adding 1-2g of the hydrazine modified magnetic ordered mesoporous carbon nanospheres into 300ml of 200-5 ml of deionized water, adding 20-30ml of silane coupling agent, adjusting the pH to 5.2-5.5, reacting for 1-3h at 50-55 ℃ under an inert atmosphere after full dispersion, and then carrying out magnetic separation, washing and drying.
5. The diaper according to claim 1, which is excellent in water-absorbing and antibacterial properties, characterized in that: in the step S2, the polymeric dispersant is a mixture of water-soluble glucan and water-insoluble glucan, and the mass ratio of the two is (4-6): 1.
6. the diaper according to claim 1, which is excellent in water-absorbing and antibacterial properties, characterized in that: in the step S2, the mass ratio of the water, the magnetic ordered mesoporous micro/nanospheres, the polymeric dispersant and the acrylic acid is (100-: (5-7): (2-3): (60-80).
7. The diaper according to claim 1, which is excellent in water-absorbing and antibacterial properties, characterized in that: the addition amount of the sodium hydroxide in the step S3 is 35-40% of the mass of the acrylic acid.
8. The diaper according to claim 1, which is excellent in water-absorbing and antibacterial properties, characterized in that: in the step S4, the addition amount of the composite cross-linking agent is 4-8% of the mass of the acrylic acid, and the addition amount of the initiator is 0.5-4% of the mass of the acrylic acid.
9. The diaper according to claim 8, wherein the diaper has excellent water-absorbing and antibacterial properties, and is characterized in that: the composite cross-linking agent in the step S4 is NMBA and PEGDA according to the mass ratio of 1: (8-9) the initiator is ferric chloride-sodium sulfhydrate.
10. A processing technology of the paper diaper with excellent water absorption and locking antibacterial performance as claimed in claim 1 is characterized in that:
s1: preparing an absorbent core layer;
s2: compounding the absorbing core layer with the diversion layer to enable the lower surface of the diversion layer to be bonded with the upper surface of the absorbing core layer through fixing glue;
s3: the surface layer is covered, after the surface layer is covered on the upper surface of the absorption core layer, two side ends of the surface layer respectively extend to the lower surface of the absorption core layer along two sides of the absorption core layer, so that the two side ends of the surface layer are arranged on the lower surface of the absorption core layer, the lower surface of the surface layer is bonded with the upper surface of the flow guide layer through fixing glue, and the two side ends of the surface layer are bonded with the lower surface of the absorption core layer through fixing glue;
s4: the bottom film layer is bonded, and the upper surface of the bottom film layer is bonded with the lower surface of the absorption core layer;
s5: processing accessories according to a conventional process, and finishing to obtain a finished diaper product with good diversion absorption performance, wherein the accessories comprise longitudinal elastic ribs and magic tapes.
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