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CN-121975444-A - Preparation method of fibrilia-containing medium-temperature hot melt adhesive composite material

CN121975444ACN 121975444 ACN121975444 ACN 121975444ACN-121975444-A

Abstract

The invention discloses a preparation method of a middle-temperature hot melt adhesive composite material containing fibrilia, which comprises the following steps of mixing polyester fibers and fibrilia to prepare non-woven fabrics, treating the non-woven fabrics by surface treatment liquid, dipping the non-woven fabrics into the middle-temperature hot melt adhesive liquid, wherein the middle-temperature hot melt adhesive liquid comprises acrylic latex, carboxyl styrene-butadiene latex and a curing catalyst, the acrylic latex comprises functional monomers containing primary amino groups and hydroxyl groups, and carrying out hot press molding to obtain the composite material. The fibrilia has a natural pore structure and phenolic substances, so that the prepared intermediate-temperature hot melt adhesive composite material has the mildew-proof and moth-proof effects, also has good hygroscopicity, the hydroxyl on the surface of the fibrilia has good formaldehyde adsorption effect, and the epoxy group organosilicon surface treatment is chemically bonded with primary amino groups and hydroxyl groups in the adhesive solution, so that the shape retention rate of the composite material is more than or equal to 95 percent.

Inventors

  • FU LUJUN
  • ZHANG YONGHUA
  • CHEN RONG
  • FU KAILI

Assignees

  • 杭州锴越新材料有限公司

Dates

Publication Date
20260505
Application Date
20260310

Claims (8)

  1. 1. The preparation method of the fibrilia-containing medium-temperature hot melt adhesive composite material is characterized by comprising the following steps of: (1) Mixing polyester fiber and fibrilia according to the mass ratio of (50-90) (10-50), and preparing the polyester/fibrilia blend non-woven fabric through a wet-process web forming process; (2) Treating the polyester fiber and the fibrilia in the non-woven fabric with a surface treatment liquid, wherein the surface treatment liquid is an organosilicon compound containing epoxy groups, the treatment temperature is 60-90 ℃, and the treatment time is 10-60 minutes; (3) Dipping the non-woven fabric subjected to surface treatment into a medium-temperature hot melt adhesive, wherein the medium-temperature hot melt adhesive comprises acrylic ester latex, carboxyl styrene-butadiene latex and a curing catalyst, the mass ratio of the acrylic ester latex to the carboxyl styrene-butadiene latex to the curing catalyst is (25-69.5) (70-30) (0.5-5), and the acrylic ester latex contains 1-10% of functional monomers containing primary amino groups and hydroxyl groups by mass percent; (4) And (3) performing hot press molding at 120-160 ℃ to obtain the composite material with the thickness of 0.2-3 mm.
  2. 2. The method for preparing a fibrilia-containing medium-temperature hot melt adhesive composite material according to claim 1, wherein the fibrilia short fiber is ramie, flax or hemp fiber, the length is 1-10mm, the fineness is 150-500 meshes, and the surface of the fiber is pretreated by 5-15% sodium hydroxide solution.
  3. 3. The method for preparing the fibrilia-containing moderate-temperature hot melt adhesive composite material according to claim 1, wherein the organosilicon compound containing epoxy groups is gamma-glycidoxypropyl trimethoxysilane or (3-glycidoxypropyl) methyldiethoxysilane, and accounts for 3-15% of the mass of the surface treatment fluid.
  4. 4. The method for preparing a fibrilia-containing medium-temperature hot melt adhesive composite material according to claim 1, wherein the acrylate latex is composed of functional monomers containing primary amino groups and hydroxyl groups, namely allylamine and hydroxyethyl methacrylate, and the molecular weight is 1000-50000 Da.
  5. 5. The method for preparing a fibrilia-containing medium temperature hot melt adhesive composite material according to claim 1, wherein the curing catalyst is dibutyl tin dilaurate or zinc iso-octoate.
  6. 6. The method for preparing a fibrilia-containing medium temperature hot melt adhesive composite material according to claim 1, wherein the pressure during the hot press molding is 2-8 MPa and the dwell time is 30-120 seconds.
  7. 7. The method for preparing the fibrilia-containing medium-temperature hot melt adhesive composite material according to claim 1, wherein the gram weight of the non-woven fabric is 40-200 g/m 2 , and the solid content of the adhesive solution after gum dipping is 20-60% of the total mass of the composite material.
  8. 8. The method for preparing the fibrilia-containing medium-temperature hot melt adhesive composite material according to claim 1, wherein the composite material is applied to automotive interiors, furniture, building wallboards, shoe materials and the like.

Description

Preparation method of fibrilia-containing medium-temperature hot melt adhesive composite material Technical Field The invention relates to a preparation method of a fibrilia-containing medium-temperature hot melt adhesive composite material, and belongs to the technical field of preparation of medium-temperature hot melt adhesive composite materials. Background The hot melt adhesives are solid adhesives using thermoplastic polymers (rubber, resin, etc.) as basic raw materials, are solid at normal temperature, and become liquid when heated above the melting point, and adhere to a substrate. An intermediate temperature hot melt adhesive is a thermoplastic adhesive that melts and exerts a bonding effect in an intermediate temperature range (typically referred to as 100 ℃ C. To 180 ℃ C.). The adhesive is prepared from thermoplastic resin as main component, and through heating to molten state, coating onto the surface of adhered matter, cooling and solidifying. The medium-temperature hot melt adhesive has the characteristics of moderate melting temperature, high bonding strength, high solidification speed, good weather resistance and the like. The melting temperature is lower than that of high-temperature hot melt adhesive, so that the thermal damage to adherends and equipment can be reduced, and meanwhile, the good bonding performance is maintained. The intermediate-temperature hot melt adhesive is widely applied to the fields of packaging, woodworking, shoe materials, electronics, automobile interiors and the like. However, the intermediate-temperature hot melt adhesive used in the product field is required to have the effects of moth resistance, mildew resistance, moisture absorption and certain formaldehyde absorption. How to prepare a medium-temperature hot melt adhesive composite material has the effects of mould prevention, moth prevention and formaldehyde absorption and is a problem to be solved. Disclosure of Invention The invention aims to provide a preparation method of a fibrilia-containing medium-temperature hot melt adhesive composite material, and the prepared composite material has a mothproof and mildew-proof effect and a formaldehyde absorption effect. In order to solve the technical problems, the aim of the invention is realized as follows: The invention relates to a preparation method of a fibrilia-containing medium-temperature hot melt adhesive composite material, which comprises the following steps: (1) Mixing polyester fiber and fibrilia according to the mass ratio of (50-90) (10-50), and preparing the polyester/fibrilia blend non-woven fabric through a wet-process web forming process; (2) Treating the polyester fiber and the fibrilia in the non-woven fabric with a surface treatment liquid, wherein the surface treatment liquid is an organosilicon compound containing epoxy groups, the treatment temperature is 60-90 ℃, and the treatment time is 10-60 minutes; (3) Dipping the non-woven fabric subjected to surface treatment into a medium-temperature hot melt adhesive, wherein the medium-temperature hot melt adhesive comprises acrylic ester latex, carboxyl styrene-butadiene latex and a curing catalyst, the mass ratio of the acrylic ester latex to the carboxyl styrene-butadiene latex to the curing catalyst is (25-69.5) (70-30) (0.5-5), and the acrylic ester latex contains 1-10% of functional monomers containing primary amino groups and hydroxyl groups by mass percent; (4) And (3) performing hot press molding at 120-160 ℃ to obtain the composite material with the thickness of 0.2-3 mm. Based on the scheme and as a preferable scheme of the scheme, the fibrilia is ramie, flax or hemp, the length is 1-10mm, the fineness is 150-500 meshes, and the surface of the fibrilia is pretreated by 5-15% sodium hydroxide solution. On the basis of the scheme and as a preferable scheme of the scheme, the organosilicon compound containing the epoxy group is gamma-glycidoxypropyl trimethoxysilane or (3-glycidoxypropyl) methyldiethoxysilane, which accounts for 3-15% of the mass of the surface treatment liquid. Based on the scheme and as a preferable scheme of the scheme, the acrylate latex is functional monomers containing primary amino groups and hydroxyl groups, namely allylamine and hydroxyethyl methacrylate respectively, and the molecular weight is 1000-50000 Da. In addition to the above scheme, and as a preferable scheme of the above scheme, the curing catalyst is dibutyl tin dilaurate or zinc isooctanoate. On the basis of the scheme, and as a preferable scheme of the scheme, the pressure during hot press molding is 2-8 MPa, and the pressure maintaining time is 30-120 seconds. On the basis of the scheme and as a preferable scheme of the scheme, the gram weight of the non-woven fabric is 40-200 g/m 2, and the solid content of the glue solution after glue dipping accounts for 20-60% of the total mass of the composite material. On the basis of the scheme, the composite material is applied to automotive interiors,