OPTIMIZATION THE PARAMETERS OF LIQUID FINISHINGOF LEATHER

Abstract

Determine the optimal parameters of liquid finishing of natural leather for uppers shoes using  advanced  chemical  materials:  organic  syntan  Politan  BN  based  on  the  aromatic  compounds  for neutralization,  synthetic  retanning  syntan  Retanal  LMV  based  on  the  melamine  for  retanning-filling  and anionic fatliquor preparations – СМХ-473 and Sulphirol C for fatliquoring. Methodology. To achieve this purpose, the methods of a full factorial experiment, computer modeling, organoleptic assessment, and chemical and physical-mechanical analysis of the leather were used. An adequate model that describes the effect of processing parameters on indices of chrome goat leather for uppers shoes was obtained. With the use of computer program MathCAD, conditional-optimal parameters were determined that confirm the rational consumption of chemical materials for neutralization, retanning-filling and fatliquoring, improving quality of the finished leather. That, in turn, will improve the functional, consumer, production and economic requirements for products made of leather. Scientific  novelty.  The  relationship  between  the  parameters  of  liquid  finishing  processes  and  the
quality of the leather such as tensile strength, elongation at brake at 10 MPa, absolute vapor permeability, and yield volume are established. Practical value.  According to results of search, the optimal parameters of liquid finishing processes were established (consumption of syntan Politan BN at 3.6 % for neutralization, syntan Retanal LMV 4.5 % for retanning-filling, proportion of 70:30 preparations СМХ-373 and Sulfirol C for fatliquoring at 5.0 % of total  fat  consumption)  which  provide  high-quality  of  chrome  goat  leather  for  uppers  shoes.  It  has  been determined that in comparison with traditional treatment, it is possible to improve such important indices of
leather as an increase of the tensile strength by 19.4 %, relative elongation at  a  pressure of 10 MPa - by 3.4 %, absolute vapor permeability - by 52.3 %, volume yield - by 21.7 %.