Determinación de la curva de hidrólisis de piel bovina serrana ecuatoriana con agentes hidrolizantes a distintas concentraciones durante el calero.

Abstract

The objective of the study is to determine the hydrolysis curve of Ecuadorian mountain cattle skin, to this end leather samples "wet blue" were obtained in the company "Hidalgo Tannery" with four different treatments of Sodium Sulfide-Calcium hydroxide in the liming and Calera stage. The samples are dried in an oven at 60ºC for 24 hours, to work on a dry basis. The hydrolysis curve was determined using data of skin substance obtained according to ASTM D 2868-17 (Kjeldahl Method) of the samples, in the Animal Nutrition and Bromatology laboratory of the Faculty of Animal Science, performing four repetitions for each treatment corresponding to the buttock region, for this purpose, the treatment corresponding to the first combination of Sodium-Cal Sulfide obtains the highest values (79.51%) than in the other treatments. However, the statistical analysis determines that there are no significant mean differences between treatment 1 and treatment 2 so that both have equal derivation in obtaining skin substance. For quality purposes, the 4 treatments were subjected to sensory and physical-mechanical tests, for which the finished leather was provided, which was not complete. The tensile strength results placed treatment 4 with 1341.58 N/cm2 as the highest. It is concluded that the results of the Physical-Mechanical and sensory tests realized to the finished leather directly relate the trend in the amount of skin substance consumed by each treatment offering better results treatments 1 and 2 for all tests performed. In addition, the study of this research with another type of animal skin is recommended.