Utilización de diferentes niveles de ligante poliuretano en combinación con un ligante acrílico, para la obtención de cuero con acabado lustroso para calzado masculino.

Abstract

In the leather furnace laboratory of Facultad de Ciencias Pecuarias, in Escuela Superior Politécnica de Chimborazo, Chimborazo province, leather with a lustrous finish was elaborated using different levels (150, 175, 200 g) of polyurethane binder in combination with acrylic binder (150g) and physical resistances (tension and elongation, resistance to dry rubbing) of the sensory evaluation (softness, fullness, coverage power) were evaluated. We used 24 leather distributed in eight repetitions with an experimental unit of a goat leather. The analyzes were carried out in the leather furnace laboratory. Distributed by a random design. The results were analyzed through the Analysis of Variance (ANOVA) and separation of average by Tukey's statistical test. The results indicate that the appropriate level of polyurethane binder is 200g / kg of polyurethane binder, in combination with an acrylic binder (150g), due to a very attractive goat skin finish is achieved. The best resistance to tension (3748.93 N / cm2), and dry rubbing (68.75 cycles), are achieved by applying in the glossy finish 200g, polyurethane binder that exceed the limits allowed according to the Physical Test of the international union 6. The highest scores of fullness (4.63 points) and power of coverage (4.63 points), are achieved by applying 200g of polyurethane binder (T3), while the greater softness (4.63 points). The highest cost benefit percentage was determined with 200 g of polyurethane binder whereas the value was 1.24, that is, for every dollar invested a profit of 24 cents is estimated. We recommend the leather producing sector to use this level to obtain a material of very good quality and unique appearance.