Розробка композиції для взуття з використанням вторинних виробничих ресурсів

The object of this study is the process of forming a coating on a chromium-tanned split leather semi-finished product. The study is aimed at developing an optimal formulation of a finishing composition for the production of footwear upper leather. A technology has been developed for forming a decorative coating on chromium-tanned split hides from pigs and heavy cattle. The composition of the finishing formulation was determined through computer modeling and multiparameter optimization using Harrington’s desirability function. Based on the analysis of the physico-mechanical properties of the resulting monolithic films, the qualitative composition of the film-forming finishing composition was established. Computer-aided modeling of the “composition – property” system for a three-component formulation, using the Scheffé mathematical model, enabled the derivation of analytical relationships between the physico-mechanical properties of the finishing composition and its constituents. The optimal composition was determined at the maximum values of the desirability function and physico-mechanical parameters through multiparameter optimization. The leather produced using the optimal composition was tested under industrial conditions and complies with DSTU 2726-94 and DSTU 3115-95, for upper footwear leather and leather for garment production, respectively. The use of a highly porous chromium-tanned split leather semi-product derived from pig hides ensures the production of high-quality, elastic upper leather. The developed finishing technology for split hides of pigs and heavy cattle demonstrates significant potential for use in the manufacture of everyday footwear.