Research of the Effect of Esters Used in Fatliquoring Leather for Shoe Uppers

Abstract

This work is a research by the method of IR spectroscopy of the fatliquoring process based on a new fatliquoring agent-ester, absorbed by the leather, and its physical and mechanical characteristics. As a result of research, it was found that when an ester interacts with functional groups of collagens, hydrogen bonds are mainly formed. As a result, it is partially deposited between the fibers, and also combines with the leather substance. In this case, the surface of the fibers is enveloped in a film of fat, which separates them and thereby prevents adhesion during evaporation of water during the drying process of the leather. Researches have established that the use of an ester is possible as a fatty component for the production of natural leather, which leads to a deeper and more even distribution of fat in the dermis.