Device for Determining Permeability of Tanning Liquid

Abstract

An important problem in the field of improving and developing equipment for determining the filtration properties of porous materials (in the example of skin products) is solved in the article. The importance of this study lies in the experimental determination of the permeability coefficient of the porous material. The filtration capacity of the hide samples and the coatings of the working rolls made of LASCH and BM cloths was experimentally determined in the article under industrial conditions. The results of the study of the filtration capacity of the skin product samples in the areas under consideration will make it possible to fulfill the requirements for the high-quality processing of skin materials. It was determined that the highest value of the filtration coefficient was observed in the "belly" section of the hide, the smallest value - in the "shoulder" section, and the average value - in the "butt" section, which is explained by the density of the structure of collagen fibers and pores; as the "belly" has a looser structure, the "shoulder" – the densest, and the "butt "is between them. The highest value of the filtration coefficient is observed with the LASCH cloths, and the smallest – with the BM cloth, which depends on the density of the structure of the considered cloth and the size of their pores. The LASCH cloth is made of polymer threads, while the BM cloth consists mainly of natural wool fibers and, to a lesser extent, of synthetic threads. A critical analysis of the results of an experimental study showed that the filtration capacity of a skin product decreases with an increase in the pressure of the tanning liquid.