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Preparation method of shoe lining leather

A technology of wet resin and viscosity control, which is applied in the field of synthetic leather, can solve the problems of insufficient peel strength, folding resistance and wear resistance of shoe lining leather, and achieve the effects of rich hand feeling, increased thickness and improved wear resistance

Active Publication Date: 2020-05-19
HUALUN LEATHER & PLASTIC SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the production of the shoe lining, the bottom layer of the dry method is bonded with the base and then cured to obtain the shoe lining. Although the environmental protection has been improved to a certain extent, the properties of the shoe lining such as peel strength, folding resistance and wear resistance There are still deficiencies

Method used

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  • Preparation method of shoe lining leather

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Embodiment 1

[0029] The shoe lining provided by this embodiment is prepared by the following method:

[0030] (1) Mix and stir the first water-based PU resin, deionized water, water-based thickener and leveling agent evenly to prepare the first mixed slurry, and control the viscosity of the mixed slurry at 2800±200CPS. Air bubbles, stand still for defoaming, take a textured release paper DE90, use a 10 wire coating rod to scrape the first mixed slurry on the surface of the release paper, the thickness of the wet coating is 0.10mm, put it in 80 ℃ oven for 15 minutes to prepare the PU surface layer;

[0031] (2) Mix and stir the first water-based PU resin, deionized water, water-based thickener and leveling agent evenly to prepare the second mixed slurry, and control the viscosity of the second mixed slurry at 2800±200CPS, during the stirring process Bubbles are generated in the middle, stand for defoaming, and then use a 13-wire coating rod to scrape-coat the second mixed slurry onto the s...

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Abstract

The invention relates to a preparation method of shoe lining leather. The preparation method comprises the following steps: (1) uniformly mixing and stirring PU resin, a thickener, a leveling agent and water to prepare mixed slurry; (2) coating the surface of release paper with the mixed slurry, carrying out drying to obtain a PU surface layer, coating the surface layer with the mixed slurry, carrying out drying, and forming a PU bottom layer on the PU surface layer to obtain a PU dry film; (3) impregnating base cloth with water-based wet resin, and carrying out drying to obtain a base; and (4) coating the PU bottom layer of the PU dry film with a solvent-free adhesive, carrying out pre-drying, laminating the PU dry film with the base, and conducting drying and curing to obtain the shoe lining leather. According to the invention, the PU dry film and the base are compounded by adopting the specific solvent-free adhesive, a formula of the solvent-free adhesive is optimized, and proper raw materials are selected to prepare the PU bottom layer and the PU surface layer, so the peel strength of the shoe lining leather is greatly improved, and the folding resistance and the wear resistance of the shoe lining leather are improved; and the DMF content of the shoe lining leather meets requirements prescribed by the ZDHC organization according to detection results.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, and in particular relates to a preparation method of shoe lining leather. Background technique [0002] With the improvement of people's living standards, more attention has been paid to environmentally friendly products, and the traditional civilian oily shoe lining has gradually highlighted its disadvantages, because it will be accompanied by DMF in the production process, which will be absorbed in the leather, which may be hidden to the human body. cause harm. [0003] For environmental protection requirements, the surface layer and the bottom layer of the shoe lining are also gradually replaced by water-based polyurethane materials for oily materials. A method for producing environmentally friendly spunlace non-woven shoe lining disclosed in Chinese patent CN107090723A includes the following steps: Step 1: Soak 45g to 80g of spunlace non-woven fabric in the mixture of water-based p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/04B32B7/12B32B27/12B32B27/20B32B7/06B32B27/40B32B33/00B32B37/12A43B23/07B29D7/01C09J11/04C09J175/08D06N3/00D06N3/14
CPCA43B23/07B29D7/01B32B5/02B32B7/06B32B7/12B32B27/12B32B27/20B32B27/40B32B33/00B32B37/1284B32B2255/10B32B2255/26B32B2260/021B32B2260/046B32B2307/546B32B2307/554B32B2437/02C08K2003/265C09J11/04C09J175/08D06N3/0061D06N3/0077D06N3/0097D06N3/145D06N2205/023C08K3/26
Inventor 王建伟高金岗张卫松
Owner HUALUN LEATHER & PLASTIC SUZHOU
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