THE INFLUENCE OF THE PICKLING PROCESS ON THE PROPERTIES OF SEMI-FINISHED LEATHER PRODUCTS FROM OSTRICH SKINS

The possibility of using aliphatic acids in the pickling process in the production of leather from ostrich skins, instead of alkaline treatment in the presence of calcium hydroxide and sodium sulfide, is considered. The results of experiments are presented and a comparative analysis of the results of assessing the state of the pelt and semi-finished product at various stages of the technological process is given, including on the basis of determining the structure of the dermis and elastic-plastic characteristics. It is shown that the proposed technology for obtaining a leather semi-finished product from ostrich skins, based on the use of step pickling in combination with single and double mechanical processing during fleshing and breaking, allows excluding the liming process from the production cycle, thereby reducing the negative impact on the environment.