MODELING OF QUALITY INDICATORS OF THE LEATHER COATING

The article is devoted to modeling the quality of leather coatings by optimizing the composition of the coating composition based on polymer film formers of different chemical nature and pigment material. Finishing coating affects the quality of the leather coating and regulates the physico-chemical, physico-mechanical and hygienic parameters of the leather semi-finished product. The quality of the leather coating is assessed by a lot of indicators. Quantitative indicators of physicochemical, physico-mechanical and hygienic properties characterize the behavior of the coating during operation. The aim of the work is to model the quality indicators of the leather coating by optimizing the composition of the coating composition obtained using pigment materials based on colored modified dispersions of montmorillonite and polymer film formers of different chemical nature. The influence of components of covering compositions on physical-mechanical and operational indicators of a covering is investigated in the work. Mathematical models were obtained using D-optimal simplex lattice plans of the experiment. Using mathematical models, the influence of individual components of the coating composition and their ratio on the quality of the leather coating is described. By multicriteria optimization of the generalized desirability function and the method of fair compromise, the optimal (rational) ratios of the components of the coating composition are obtained, which give the leather finishing coating the necessary quality indicators. The obtained experimental indicators of the properties of the leather coating are completely correlated with the indicators calculated by modeling. This confirms the reliability of the simulation results and indicate the high quality of the studied coating on the leather.