Method for modifying superfine fiber synthetic leather based on amino-terminated hyperbranched polymer

Abstract

The invention discloses a method for modifying superfine fiber synthetic leather based on an amino-terminated hyperbranched polymer. The amino-terminated hyperbranched polymer is introduced into superfine fiber synthetic leather base cloth subjected to moderate acid hydrolysis through a cross-linking agent capable of crosslinking with amino and carboxyl to increase amino active groups, and then the cross-linking agent is added again to crosslink with gelatin hydrolysate to improve binding capacity of the gelatin hydrolysate and remarkably increase hydrophilic groups inside the base cloth. Simultaneously, a conventional natural leather processing technology is adopted to perform dyeing, grease adding, coating, middling and other operations to modified base cloth, and an imitated natural leather product with performance nearly equal to the natural leather performance is produced. By means of the method, hygienic performance and dyeing performance of products are nearly equal to those of the natural leather, and the products have elasticity, fullness and natural appearance of natural leather products. Simultaneously, the method does not relate to organic solvents, thereby solving the problem that a large number of organic solvents are used in the finishing process after existing superfine fiber synthetic leather is synthetized.

Description

technical field [0001] The invention relates to natural leather dyeing, fatliquoring and finishing processes, in particular to a method for modifying superfine fiber synthetic leather based on an amino-terminated hyperbranched polymer. Background technique [0002] With the continuous development of the microfiber synthetic leather industry, its application fields are also expanding. Although it is superior to natural leather in many aspects (such as mechanical properties), its hygienic performance and dyeing performance are similar to natural leather. Compared with leather, there is still a big gap, which restricts the further development of superfine fiber synthetic leather. The reason why the hygienic performance of microfiber synthetic leather is poor is that the hydrophilic groups on the polyamide fiber of microfiber synthetic leather are less than those on collagen fibers in natural leather, and its hygroscopicity poor. The reason why the dyeing performance of microf...

AI Technical Summary

Problems solved by technology

[0003] In addition, in the post-finishing of ultrafine fiber synthetic leather, most of them adopt the dry film transfer process, and the resulting organic solvent pollution has become a major problem in the synthetic leather industry.

In order to solve this difficult problem, many researchers have attempted to conduct research on wet film formation of waterborne polyurethane, but it is still immature.