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CN-121971241-A - Paper diaper with composite absorption core and preparation method thereof

CN121971241ACN 121971241 ACN121971241 ACN 121971241ACN-121971241-A

Abstract

The invention discloses a paper diaper with a composite absorption core body and a preparation method thereof, and relates to the technical field of disposable sanitary products, comprising the following steps that 1, a layer of wrapping layer material is spread, wood pulp fiber and super absorbent resin particles are mixed and paved to form an absorption layer; repeating for several times, covering a layer of wrapping material, hot-pressing and compounding to form composite absorption core, and step 2, placing composite absorption core, diversion layer material and surface layer material on the upper surface of the bottom layer in turn, pressing, welding and cutting to obtain paper diaper. According to the invention, tannic acid and polylysine are introduced into the SAP and the hydrophilic finishing film layers of the surface layer, the wrapping layer and the diversion layer non-woven fabric, so that the SAP has higher absorption speed, higher pressurized absorption capacity and extremely low rewet capacity, and the skin care effect is given, and the non-woven fabric is given with lasting hydrophilicity, so that the use experience of instantaneous absorption, wide diffusion, dry surface layer and the like of the whole paper diaper is realized.

Inventors

  • JU DAIXIA
  • CHEN BIN
  • WAN RONG

Assignees

  • 江苏宝姿实业有限公司

Dates

Publication Date
20260505
Application Date
20260305

Claims (10)

  1. 1. A preparation method of a paper diaper with a composite absorption core body is characterized by comprising the following steps: step 1, spreading a layer of wrapping layer material, mixing and paving wood pulp fiber and super absorbent resin particles, repeating for a plurality of times, and then covering a layer of wrapping layer material; Step 2, taking a bottom layer material, placing a composite absorption core on the upper surface of the bottom layer material and positioning, taking a diversion layer material, covering and attaching the diversion layer material above the absorption core, taking a surface layer material, covering and attaching the diversion layer material above the diversion layer, attaching an accessory, pressing, welding and cutting to obtain the paper diaper.
  2. 2. The method for producing a diaper having a composite absorbent core according to claim 1, wherein said Gao Xishui resin particles are produced by the following process: Mixing hydrophilic monomers to prepare a mixed solution, adding a redox initiator under the protection of nitrogen, reacting for 0.5-1.5 h at 20-30 ℃, heating to 65-75 ℃, adding a thermal initiator, continuing to react for 2-4 h, extruding, granulating to obtain wet particles, and drying at 120-150 ℃ to obtain a core material; placing the core material in a mixer, heating to 50-70 ℃, spraying a metal salt solution, and performing heat treatment reaction for 20-40 min at the temperature of 80-120 ℃ to form a crosslinked layer; transferring into a second mixer, spraying a base layer solution, and performing heat treatment reaction for 30-60 min at 100-130 ℃ to form a base layer; and transferring into a third mixer, spraying the functional layer solution, and performing heat treatment at 120-140 ℃ for 20-40 min to form a functional layer, thereby obtaining the super absorbent resin particles.
  3. 3. The method for preparing the paper diaper with the composite absorbent core according to claim 2, wherein in S1, the hydrophilic monomer comprises the following components, by mass, 70-80 parts of acrylic acid, 15-25 parts of acrylamide, 3-8 parts of 2-acrylamide-2-methylpropanesulfonic acid, 0.5-2.0 parts of methallyl polyoxyethylene ether, 0.01-0.05 parts of N, N-methylenebisacrylamide and 0.05-0.15 parts of polyethylene glycol diacrylate.
  4. 4. The method for producing a diaper with a composite absorbent core according to claim 2, wherein in S2, the metal salt solution is an aluminum sulfate solution or an ammonium zirconium carbonate solution; The base layer solution comprises the following components, by mass, 5-15 parts of hydroxyethyl methacrylate, 0.5-2.0 parts of an initiator, 0.1-0.5 parts of deionized water, 40-60 parts of isopropanol and the like; The functional layer solution comprises, by mass, 3-10 parts of tannic acid propenyl derivative, 0.5-3.0 parts of double bond functionalized polylysine, 1-3 parts of trimethylolpropane triacrylate, 0.1-0.5 part of initiator, 60-80 parts of ethanol and 20-40 parts of deionized water.
  5. 5. The method for preparing the paper diaper with the composite absorption core body, which is characterized in that the surface layer, the diversion layer and the wrapping layer are subjected to hydrophilic finishing, the process comprises the steps of taking non-woven fabrics to be treated, irradiating for 5-15 min, adding a hydrophilic finishing agent under the protection of nitrogen, and irradiating for 10-30 min at 30-40 ℃ under ultraviolet.
  6. 6. The method for preparing a paper diaper with a composite absorbent core according to claim 5, wherein the hydrophilic finishing agent comprises, by mass, 5-8% of acrylic acid, 2-4% of tannic acid propenyl derivative, 3-6% of double bond functionalized polylysine, 0.05-0.15% of N, N-methylenebisacrylamide, 0.1-0.3% of photoinitiator and the balance of deionized water.
  7. 7. The method for producing a paper diaper having a composite absorbent core according to claim 6, wherein the tannic acid propylene-based derivative is produced by the following process: Mixing tannic acid and p-hydroxyanisole in a solvent, adding triethylamine under the protection of nitrogen, heating to 80-90 ℃, slowly adding glycidyl methacrylate, finishing the addition within 1-2 hours, and then carrying out heat preservation and stirring reaction for 8-12 hours to obtain the tannic acid propenyl derivative.
  8. 8. The method for preparing a paper diaper with a composite absorbent core according to claim 6, wherein the double bond functionalized polylysine is prepared by the following process: And dissolving polylysine in a solvent, adding glycidyl methacrylate under the protection of nitrogen, and stirring and reacting for 8-48 hours at 50-60 ℃ to obtain double-bond functionalized polylysine.
  9. 9. The method for manufacturing a paper diaper with a composite absorbent core according to claim 1, wherein the mass ratio of wood pulp fluff to superabsorbent resin particles is 1:1-3.
  10. 10. A diaper having a composite absorbent core produced by the production method according to any one of claims 1 to 9.

Description

Paper diaper with composite absorption core and preparation method thereof Technical Field The invention relates to the technical field of disposable sanitary products, in particular to a paper diaper with a composite absorption core body and a preparation method thereof. Background Along with the pursuit of increasingly higher living standard of people, the performance requirements of the market on disposable sanitary products such as paper diapers and the like are also higher and higher, and the disposable sanitary products are prevented from leakage from basic absorption and are turned to dry, comfortable and comfortable. The traditional absorption core body with bitter handling mostly adopts simple compounding of wood pulp fluff and super absorbent resin, and has the problems of low absorption speed, easy reverse osmosis under compression, easy lump formation, fault formation and the like. In order to improve the performance, the prior art mostly performs single modification/treatment optimization on SAP particles and non-woven fabrics, but does not provide a collaborative design on the system level. Therefore, we propose a diaper with a composite absorbent core and a method for making the same. Disclosure of Invention The invention aims to provide a paper diaper with a composite absorption core body and a preparation method thereof, so as to solve the problems in the background art. In order to solve the technical problems, the invention provides the technical scheme that the paper diaper with the composite absorption core body sequentially comprises a surface layer, the composite absorption core body and a bottom layer from top to bottom; The composite absorbent core comprises a plurality of wrapping layers and an absorbent layer arranged between two adjacent wrapping layers; The absorbing layer is obtained by mixing wood pulp fluff, hot air materials mixed by low-melting-point fibers and super absorbent resin particles (SAP for short), and the addition of the low-melting-point fibers can bond the wood pulp fibers and the SAP in a hot-melt manner, so that the problem of lump formation and fault of paper diapers is solved. Further, in the absorption layer, the mass ratio of the wood pulp fluff to the super absorbent resin particles is 1:1-3. Further, the particle size of the super absorbent resin particles is 80-200 meshes, and the content of the particle size is less than 40 μm and less than 5wt%. Further, if two layers of absorption layers are adopted in the composite absorption core body, the particle size of the SAP is gradually decreased from top to bottom, for example, the particle size of the SAP in the first absorption layer is 60-100 meshes, and the particle size of the SAP in the second absorption layer is 150-300 meshes. Further, wood pulp fluff, the average length of the fibers is 2.5mm to 3.5mm, the coarseness is 13 to 16mg/100m, and the dry bulk is generally 48 to 60cm 3/g, which is from conifer. Further, the absorbent layer has a grammage of 300-500 gsm. Further, in the structure of the composite absorbent core, the wrapping layer is dust-free paper or thin non-woven fabric. Further, the dust-free paper contains hot-melt fibers, and the gram weight of the dust-free paper is 25-40 gsm (grams per square meter); the thin non-woven fabric is spun-bonded a nonwoven fabric or a hot-rolled nonwoven fabric, the gram weight is 15-25 gsm. Further, a flow guide layer is arranged between the surface layer and the composite absorption core body, the flow guide layer is fluffy non-woven fabric, and is preferably PET hot air non-woven fabric which is cross-lapped and embossed for shaping, the gram weight is 40-70 gsm, and the fluffiness is 1.0-2.0 mm. Further, the surface layer is an SMS non-woven fabric or an SMMS non-woven fabric, the surface is hot-pressed with three-dimensional patterns, diamond-shaped punching holes or vortex punching holes are formed in the surface, and the punching aperture is 0.8-1.5 mm; And the gram weight is 18-25 gsm, and the fiber adopts 1.5-2.0 denier polypropylene fine denier fiber. Further, the bottom layer is a composite of a PE breathable microporous film and an outer layer non-woven fabric, the water vapor transmittance is more than or equal to 1000g/m 2.24 hours, the hydrostatic pressure is more than or equal to 100cmH 2 O, and the gram weight is 20-35 gsm; The gram weight of the PE breathable microporous film is 15-25 gsm; the outer layer non-woven fabric is PE spun-bonded non-woven fabric, the gram weight is 12-18 gsm. Furthermore, the surface layer, the diversion layer and the thin non-woven fabric are subjected to hydrophilic finishing. A preparation method of a paper diaper with a composite absorption core body comprises the following processes: Step1, spreading a layer of wrapping layer material, mixing wood pulp fiber with super absorbent resin particles, paving to form an absorption layer, and repeating for a plurality of times; And then covering a layer of w