QUALITY ASSESSMENT OF FUR VELOUR

The paper offers a quantitative assessment of the quality of fur velour made of raw sheepskin and nutria skins obtained by the developed technologies. For this purpose, hydrophobized fur velour made of semi-fine-wool sheep skins and nutria skins with low-quality bristle hair has been used. The tanned semi-finished product of sheepskin and male nutria after moisture removal has been processed with a grinding skin of 4-5 grit. Fur velour is obtained from raw materials of inhomogeneous structure in different topographic areas, low density, but with satisfactory physical and mechanical properties of leather fabric, which in its quality meets standards requirements. The hydrophobization process is carried out with a composition based on α-alkenes С20–24 and maleic anhydride with an average molecular weight of 38‧103. According to the purpose of the research, a comprehensive assessment of the quality level of hydrophobized fur velour has been performed. A number of tasks have been implemented. Individual indicators of fur velour have been selected and ranked by experts. Their significance has been determined. The range of dimensional indicators of fur velour quality has been pointed out according to the scale of desirability. Desirability functions of velour quality significant indicators and complex quality index (CQI) of hydrophobized fur velour have been developed. The results of CQI development of sheepskin and nutria skins hydrophobized fur velour have been analyzed. CQI of hydrophobized fur velor and nutria skins, which includes 10 significant experimentally determined indicators has been calculated. According to the CQI, the hydrophobized velour material significantly outperforms fur velour obtained by standard technologies, especially after its sprinkling. Hydrophobized velour of sheepskin and nutria is characterized by a higher thermal resistance of 1.17 and 1.15 times, respectively, in comparison with control samples. The obtained materials can be effectively used to manufacture clothing items suitable for use in extreme conditions under rain and snow.