Preparation method of hydrolysis-resisting polyurethane synthetic leather for sofas, furniture and automobile seats

Abstract

The invention provides a preparation method of hydrolysis-resisting polyurethane synthetic leather for sofas, furniture and automobile seats. The preparation method comprises the steps of preparation of organic silicon modified poly-carbon type polyurethane resin, impregnation treatment of a cloth base, preparation of a transfer membrane and curing of a coating. According to QB / T 4671-2014 (determination of hydrolysis resistance of an artificial leather and synthetic leather testing method), the surface PU coating is not cracked or powdered after the synthetic leather is stored for more than 10 weeks under the environments that the temperature is 70 DEG C and the relative humidity is 95%, and the stripping strength basically keeps unchanged; and the hydrolysis-resisting polyurethane synthetic leather can be widely applied to fabrics of the sofas, the furniture and the automobile seats under high-temperature and high-humidity environments, and a jungle test result shows that the hydrolysis-resisting polyurethane synthetic leather can be used for 10 years.

Description

Technical field [0001] The present invention involves a decade of water -resistant sand -resistant furniture and automotive seat production method for synthesis of polyurethane synthetic leather, which especially involves the effect of organic silicon resin to improve the synthetic leather and hydrolysis. Background technique [0002] Polyurethane synthetic leather is the most ideal material in the world to replace natural leather products. It is mainly used in shoes, bags, balls, balls, furniture and cars.With the improvement of people's living standards, people have also put forward higher requirements for the durability of synthetic leather, especially in terms of car seats and sofa fabrics that require the hydrolysis resistance of synthetic leather for more than 10 years.The factors affecting PU leather aging are mainly air, sunlight and moisture. The hydrolysis resistance of synthetic leather depends on the hydrolysis resistance of Boji and PU layer. [0003] At present, t...

AI Technical Summary

Problems solved by technology

[0003] At present, the production process of polyurethane synthetic leather can be divided into wet-dry process and full-dry process. The specific production steps of the wet-dry process are to first make the cloth base into a bass through a wet process, and then pass a dry process on the base. Process veneer, after drying and molding to make finished products, the product has good air permeability and strong leather feel. The disadvantage is that the process is long and the product has poor hydrolysis resistance; the full dry process refers to coating the resin on the release paper directly. The finished product is dried and molded after lamination. The advantage is that the process is short, and the product has good touch, toughness, appearance and hydrolysis resistance, but the disadvantage is that it is difficult to reach the level of hydrolysis resistance for more than 10 years, and the product has poor air permeability