Waterborne polyurethane decorative leather and manufacturing method thereof

Abstract

The invention provides waterborne polyurethane decorative leather and a manufacturing method thereof. The manufacturing method includes the steps of 1), performing base cloth treatment; 2), coating; 3), agglomerating; 4), conducting washing and drying, namely removing residual solidification liquid on the base cloth through a washing trough, drying and setting so as to obtain waterborne polyurethane decorative leather base; 5), conducting dry-process direct coating, namely applying the waterborne polyurethane decorative leather base with waterborne direct coating topcoat slurry and drying; 6), subjecting the waterborne polyurethane decorative leather base obtained after dry-process direct coating to high-temperature embossing to shape surface effect grain so as to obtain the waterborne polyurethane decorative leather. The manufacturing method has the advantage that the waterborne polyurethane resin slurry and a waterborne environment-friendly auxiliary are used for enabling the decorative leather to be free of organic solvents during preparation and use, so that the problems of contamination and residues of solvent-type decorative leather are solved. The waterborne polyurethane decorative leather has the advantages of compact structure, less proneness to cracking and wear and flexibility in hand feel and can meet the demands of existing market on the decorative leather completely.

Description

technical field [0001] The invention relates to the technical field of decorative leather, and specifically discloses a water-based polyurethane decorative leather and a manufacturing method thereof. Background technique [0002] At present, synthetic leather has been applied in various fields in people's life, and there are various varieties. Decorative leather is a product developed in the synthetic leather industry in recent years. It has the advantages of light weight, wear resistance, heat resistance, toughness, good cold resistance, and high tensile strength. At present, the decorative leather is still made of solvent-based polyurethane, and the DMF (dimethylformamide) in the solvent-based polyurethane is replaced with water by a wet process, so that the coating has continuous pores, so as to achieve a certain thickness to increase the three-dimensional effect. However, a large amount of DMF is used in the coating slurry, and the solvent is washed and replaced, but it...

AI Technical Summary

Problems solved by technology

In recent years, the research on the preparation of waterborne polyurethane synthetic leather has made great progress, but the research on decorative leather is still in the traditional manufacturing process, especially in order to achieve the leather feel, wear resistance and ecological environmental protection, further development is needed