STRUCTURING OF LEATHER SEMI-FINISHED PRODUCTS OBTAINED FROM HORSE FOOT
DOI:
https://doi.org/10.35546/kntu2078-4481.2025.1.1.42Keywords:
semi-finished horsemeat, electrochemically activated water, pre-tanning and tanning processes, tanning technology, physicochemical properties of leatherAbstract
The aim of the work is to study the influence of electrochemically activated water on the pre-tanning and tanning processes of forming a leather semi-finished product from horse hides. The work used an ash semi-finished product – raw horse hide in the form of halves weighing 6,7 kg, obtained using the developed and control technologies. The features of horse hides and the resulting semi-finished product are a significant difference in the thickness of different topographical areas, which differ by 3,6 times. The technology of the processes of de-ashing-softening, pickling, tanning and re-tanning in the formation of elastic leather from horse raw materials using reagent solutions in electrochemically activated water has been developed. This technology differs from the known ones by the simultaneous treatment of all topographic areas of the horse hide. The effective use of catholyte in the processes of de-ashing-softening of a leather semi-finished product, anolyte during pickling and a mixture of anolyte with catholyte at the tanning stages has been shown. It has been established that the consumption of sodium chloride and sulfuric acid during pickling of hides has been reduced by two times and the process has been shortened by 1,7 times compared to the current technology. At the same time, the consumption of chromium compounds has been reduced by 20 % and 33 %, respectively, during tanning and re-tanning of the semi-finished product. The obtained elastic leather is superior to the control sample both in terms of the number of chemically bound reagents with collagen of the semi-finished product at lower costs, and in terms of a set of physicochemical indicators. The leather obtained using the developed technology meets the requirements of DSTU 3115-95 “Leather for sewing products. General technical requirements”. The developed technology for forming elastic leather from horse raw materials using reagent solutions in chemically activated water can be attributed to mass-saving and environmentally friendly.
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