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CN-121991599-A - Fibrilia-containing low-temperature hot melt adhesive composite sheet

CN121991599ACN 121991599 ACN121991599 ACN 121991599ACN-121991599-A

Abstract

The invention discloses a low-temperature hot melt adhesive composite sheet containing fibrilia, which comprises the following preparation steps of (1) crushing fibrilia or fibrilia yarn powder into fibrilia short fibers with the particle size of 0.1-1mm, (2) uniformly mixing the fibrilia short fibers with hot melt adhesive particles according to the mass ratio of 30-70:70-30, and hot-pressing at 80-120 ℃ to form an intermediate substrate layer with the thickness of 0.5-3mm, (3) respectively coating a layer of low-temperature hot melt adhesive layer on the upper surface and the lower surface of the intermediate substrate layer, wherein the melting point of the low-temperature hot melt adhesive layer is 60-100 ℃, and the single-layer thickness is 0.05-0.5mm. The fibrilia-containing low-temperature hot melt adhesive composite sheet provided by the invention has the advantages that the fibrilia is used in the middle substrate layer, so that the low-temperature hot melt adhesive composite sheet has antibacterial, mildew-proof and moisture-absorbing effects of the fibrilia, and can be applied to the fields of furniture, wallboards, automotive interiors, shoe materials and the like.

Inventors

  • ZHANG YONGHUA
  • FU LUJUN
  • FU KAILI
  • JIANG PENGYAN

Assignees

  • 杭州锴越新材料有限公司

Dates

Publication Date
20260508
Application Date
20260310

Claims (8)

  1. 1. A low temperature hot melt adhesive composite sheet material containing fibrilia, which is characterized by comprising the following preparation steps: (1) Crushing fibrilia or fibrilia yarn powder into fibrilia short fibers with the particle size of 0.1-1 mm; (2) Uniformly mixing the fibrilia and the hot melt adhesive particles according to the mass ratio of (30-70) (70-30), and hot-pressing and forming at 80-120 ℃ to form an intermediate substrate layer with the thickness of 0.5-3 mm; (3) And coating a layer of low-temperature hot melt adhesive layer on the upper and lower surfaces of the middle substrate layer respectively, wherein the melting point of the low-temperature hot melt adhesive layer is 60-100 ℃, and the thickness of a single layer is 0.05-0.5mm.
  2. 2. The low temperature hot melt adhesive composite sheet material comprising fibrilia according to claim 1, wherein said fibrilia is at least one selected from the group consisting of flax, ramie and hemp, said fibrilia being pretreated.
  3. 3. A low temperature hot melt adhesive composite sheet material containing fibrilia according to claim 2, wherein the pretreatment comprises the steps of: (1.1) dispersing fibrilia in alkali liquor, wherein the mass ratio of the fibrilia to the alkali liquor is (5-30) (70-95), the mass concentration of sodium hydroxide in the alkali liquor is 0.5% -10%, and the temperature of the alkali liquor is 35-70 ℃; (1.2) after the reaction is finished, separating fibrilia from alkali liquor, and cleaning with clear water; (1.3) treating the fibrilia with a silane coupling agent selected from the group consisting of vinyltriethoxysilane, isobutyltriethoxysilane, and vinyltrimethoxysilane; and (1.4) drying the fibrilia for standby.
  4. 4. The fibrilia-containing low-temperature hot melt adhesive composite sheet according to claim 1, wherein the hot melt adhesive is at least one of ethylene-vinyl acetate copolymer, thermoplastic polyurethane, nylon elastomer and ethylene propylene diene monomer rubber, and the mass concentration of nano titanium dioxide of the low-temperature hot melt adhesive composite sheet is 0.1% -5%.
  5. 5. The low temperature hot melt adhesive composite sheet material containing fibrilia according to claim 1, wherein the low temperature hot melt adhesive layer comprises 0.5-3wt% of a plant-derived mildew inhibitor, wherein the mildew inhibitor is vanillin or tea polyphenol extract.
  6. 6. The low temperature hot melt adhesive composite sheet material comprising fibrilia according to claim 1, wherein the low temperature hot melt adhesive layer is one or more selected from the group consisting of ethylene-vinyl acetate copolymer, thermoplastic polyurethane, and nylon elastomer.
  7. 7. The low temperature hot melt adhesive composite sheet containing fibrilia according to claim 1, wherein the total thickness of the low temperature hot melt adhesive composite sheet is 0.6-3.5mm, and the thickness ratio of the intermediate substrate layer to the single side low temperature hot melt adhesive layer is (5-20): 1.
  8. 8. A low temperature hot melt adhesive composite sheet comprising fibrilia according to any one of claims 1 to 7, wherein the low temperature hot melt adhesive composite sheet is suitable for furniture, wall panels, automotive interiors, footwear.

Description

Fibrilia-containing low-temperature hot melt adhesive composite sheet Technical Field The invention relates to a low-temperature hot melt adhesive composite sheet containing fibrilia, belonging to the technical field of 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. The low-temperature hot melt adhesive is one kind of thermoplastic adhesive and is mainly applied in furniture, wall board, automobile inner decoration, shoe material and other fields. However, the low-temperature hot melt adhesive is required to have good weather resistance and good antibacterial, mildew-proof and moisture-absorbing effects. How to prepare a low-temperature hot-melt adhesive has good fungus, mildew-proof and moisture-absorbing effects and is a problem to be solved. Disclosure of Invention The invention aims to provide a low-temperature hot melt adhesive composite sheet containing fibrilia, which has good fungus, mildew-proof and moisture absorption effects. In order to solve the technical problems, the aim of the invention is realized as follows: the invention relates to a fibrilia-containing low-temperature hot melt adhesive composite sheet, which is characterized by comprising the following preparation steps: (1) Crushing fibrilia or fibrilia yarn powder into fibrilia short fibers with the particle size of 0.1-1 mm; (2) Uniformly mixing the fibrilia and the hot melt adhesive particles according to the mass ratio of (30-70) (70-30), and hot-pressing and forming at 80-120 ℃ to form an intermediate substrate layer with the thickness of 0.5-3 mm; (3) And coating a layer of low-temperature hot melt adhesive layer on the upper and lower surfaces of the middle substrate layer respectively, wherein the melting point of the low-temperature hot melt adhesive layer is 60-100 ℃, and the thickness of a single layer is 0.05-0.5mm. On the basis of the scheme and as a preferable scheme of the scheme, the fibrilia is at least one selected from flax, ramie and hemp, and the fibrilia is pretreated. On the basis of the scheme and as a preferable scheme of the scheme, the pretreatment comprises the following steps: (1.1) dispersing fibrilia in alkali liquor, wherein the mass ratio of the fibrilia to the alkali liquor is (5-30) (70-95), the mass concentration of sodium hydroxide in the alkali liquor is 0.5% -10%, and the temperature of the alkali liquor is 35-70 ℃; (1.2) after the reaction is finished, separating fibrilia from alkali liquor, and cleaning with clear water; (1.3) treating the fibrilia with a silane coupling agent selected from the group consisting of vinyltriethoxysilane, isobutyltriethoxysilane, and vinyltrimethoxysilane; and (1.4) drying the fibrilia for standby. Based on the scheme, the hot melt adhesive is at least one of ethylene-vinyl acetate copolymer, thermoplastic polyurethane, nylon elastomer and ethylene propylene diene monomer rubber, and the mass concentration of the low-temperature hot melt adhesive composite sheet nano titanium dioxide is 0.1-5%. On the basis of the scheme and as a preferable scheme of the scheme, the low-temperature hot melt adhesive layer comprises 0.5-3wt% of plant-source mildew inhibitor, wherein the mildew inhibitor is vanillin or tea polyphenol extract. In addition to the above, and as a preferable mode of the above, the material of the low-temperature hot melt adhesive layer is one or more selected from ethylene-vinyl acetate copolymer, thermoplastic polyurethane and nylon elastomer. On the basis of the scheme, and as a preferable scheme of the scheme, the total thickness of the low-temperature hot melt adhesive composite sheet is 0.6-3.5mm, and the thickness ratio of the middle substrate layer to the single-side low-temperature hot melt adhesive layer is (5-20): 1. On the basis of the scheme and as a preferable scheme of the scheme, the low-temperature hot melt adhesive composite sheet is suitable for furniture, wallboards, automotive interiors and shoe materials. The low-temperature hot melt adhesive composite sheet containing the fibrilia has the beneficial effects that the fibrilia is used in the middle substrate layer, so that the low-temperature hot melt adhesive composite sheet has the antibacterial, mildew-proof and moisture-absorbing effects of the fibrilia, and can be applied to the fields of furniture, wallboards, automotive interiors, shoe materials and the like. Detailed Description The invention will be further illustrated with reference to specific examples. Example 1 The embodiment relates to a fibrilia-containing low-temperature hot melt adhesive composite sheet, which comprises the following preparation steps: The method comprises the steps of (1) crushing fibrilia or fibrilia yarn powder into fibrilia short fibers with the particle size of 0.1-