Method of preparing imitating super-fiber synthetic leather

Abstract

The invention relates to a manufacturing method of imitating microfiber synthetic leather, which is characterized in that woven fabric with double-sided floss is chosen as base fabric. Under normal temperature and pressure, polyurethane slurry is used for infiltrating the base fabric completely. After coagulation, polyurethane epithelial films are formed on the two surfaces of the base fabric. The base fabric with the polyurethane epithelial films formed on the two surfaces is successively washed by water to replace solvent, dried and molded to obtain a semi-manufactured product. Sanding treatment is implemented on the back of the semi-manufactured product to obtain a finished product. The method of the invention is simple with low cost and is beneficial to safety, environmental protection and energy saving. The imitating microfiber synthetic leather which is provided with the same hand feeling and back effect as microfiber synthetic leather can be obtained.

Description

technical field [0001] The invention relates to a manufacturing method of synthetic leather, more specifically a manufacturing method for obtaining a product similar to superfine fiber synthetic leather in terms of feel and back effect. Background technique [0002] Due to the constraints of natural conditions and the strengthening of animal protection awareness in countries around the world, especially the strengthening of environmental protection awareness, the use of natural leather is decreasing year by year. Synthetic leather is the best substitute for natural leather. China is a big country with a population of 1.3 billion. According to incomplete calculations, the current domestic demand for synthetic leather exceeds 800 million m 2 / year, and maintain an upward trend, among which the annual demand for high-performance and high-quality synthetic leather can reach 200 million m 2 above. Ordinary synthetic leather is quite different from natural leather in terms of fl...

AI Technical Summary

Problems solved by technology

The existing microfiber synthetic leather uses sea-island fiber as the cloth base, and obtains good back effect and hand feeling through processes such as alkali weight reduction or toluene weight reduction. The selection of raw materials and complicated process make the price much higher than Ordinary synthetic leather cannot be popularized in promotion and use. The reduction of toluene also leads to a harsh working environment due to the volatility of toluene. Controlling the explosion limit is also the focus of the production of microfiber synthetic leather, which is harmful to the physical, mental and personal safety of processing workers. It is a great test, not only that, the recovery of alkali or toluene after the reduction is difficult, which brings environmental protection problems, and its complicated process and long process also bring corresponding big energy consumption problems