Preparation method of shoe lining leather

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...

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