A kind of flexible, breathable and wear-resistant leather and its preparation method

Abstract

The invention provides a flexible, breathable and wear-resistant leather and a preparation method thereof, comprising: (1) dissolving polyvinyl alcohol in water to obtain an aqueous solution of polyvinyl alcohol, adding the aqueous solution of polyvinyl alcohol to a finishing agent under stirring conditions and stirring in the matrix emulsion to obtain polyvinyl alcohol / finishing agent matrix composite emulsion. (2) Firstly, wet the leather surface to be treated; secondly, spray the polyvinyl alcohol / finishing agent matrix composite emulsion on the wetted leather surface by spraying method; finally, immediately freeze the finished leather sample After multiple thawing cycles, the film was dried at room temperature. The leather prepared by the method has a three-dimensional porous network structure, and thus can significantly improve the abrasion resistance of the leather while effectively ensuring the flexibility and air permeability of the leather.

Description

technical field [0001] The invention relates to a preparation method of a leather coating, in particular to a flexible, breathable and wear-resistant leather and a preparation method thereof. Background technique [0002] Leather is tightly woven by collagen fibers, and collagen fibers are composed of collagen with a linear polymer structure, so its strength is low, resulting in poor wear resistance of leather. As the last process of leather processing, leather finishing plays a role in many aspects such as beautiful leather surface and improving the performance of leather products. The quality of coating wear resistance directly determines the application range of leather. Therefore, the study of wear resistance leather finishing Materials, prolonging the service life of leather is of great significance for the development of its industry. At present, there are two main methods for improving the wear resistance of leather finishing materials: 1. By introducing "hard segmen...

AI Technical Summary

Problems solved by technology

At present, there are two main methods for improving the wear resistance of leather finishing materials: 1. By introducing "hard segment" polymers into the base material of the finishing agent or increasing the degree of cross-linking of the matrix, by enhancing the strength and hardness of the finishing material, Improve the wear resistance of leather, but this method will easily lead to poor air permeability and flexibility of leather

2. Improve the wear resistance of leather by introducing nano-materials into the finishing agent matrix. This method can use the characteristics of nano-materials to improve the wear-resistance of leather and give it certain functionality. However, nano-materials are very easy to wear. Aggregation, so complex functional modification is often required, which increases the difficulty and production cost in the actual application process