APPLICATION OF ACACIA TANNINS IN ELASTIC LEATHER MATERIALS PRODUCTION TECHNOLOGY

An IR-spectroscopic study of the interaction collagen with blackwood acacia (acacia melanoxylon) tannins and its use for tanning filling semi-finished leather products in production elastic leathers shoe uppers was conducted. The analysis IR spectra chrome dermis extract can indicate intermolecular ionic bonds formation a hydrogen dense network building-up amino groups phenolic carbonyl plant tannins. following reagents were used product tanning: sodium chloride TU 9192-069-00200009527-98, formic sulfuric acids according to DSTU GOST 1706-78 2184:2018, carbonate ISO 6353-2-83. Blackwood together synthesis 2-naphtholsulfonic acid dioxydiphenylsulfone as synthetic agent BNS 17-06-165-89 fill tanned product. application syntan process finishing after catting it into thin slices thickness 1.4 mm ensures an increase diffusion structure provides duration reduction. technology hides makes possible obtain filled-greased increased physical chemical properties: porosity, volumetric yield, air permeability by 21, 37, 86%, respectively, compared obtained results give grounds recommendation wide range technologies.