Leather softening compound enzyme with acid proteases and method for preparing leather softening compound enzyme

Abstract

The invention discloses a leather softening compound enzyme with acid proteases and a method for preparing the leather softening compound enzyme. The leather softening compound enzyme and the method have the advantages that the leather softening compound enzyme is mainly made of the high-activity acid proteases with abundant plant proteases and microorganism proteases, mould culture, acid lipase, non-ionic surfactants, plant extract, antioxidants, protective agents, activators and the like are scientifically compounded, accordingly, the compound enzyme is provided with complete enzyme systems, is stable in activity and high in efficacy, permeability and degreasing capacity and can act mildly and moderately, the hand feel and physical and mechanical properties of crust leather can be obviously improved, the bare weight of the crust leather can be obviously increased, and the shrinkage temperatures of the crust leather of raw hide of wet-blue leather of different animals can be increased by 9-14 DEG C; the porosity of the crust leather can be improved by 7.85-10.96%; the breathability of the crust leather can be improved by 41.0-50.1 mL/cm<2>hr; the tensile strength of the crust leather can be improved by 6.51-7.47 N/mm<2>; the tear strength of the crust leather can be improved by 5.28-20 N/mm; the elongation of the crust leather can be improved by 4.8-8.7%; the quality of products can be greatly improved, and the production cost can be reduced.

Description

technical field [0001] The invention relates to a leather softening enzyme, in particular to a leather softening compound enzyme containing acid protease and a preparation method thereof. Background technique [0002] Enzymes are biological catalysts produced by biological cells and proteins with special catalytic capabilities. Enzymes can be extracted from animal tissues and microorganisms. Due to limited animal and plant raw materials, industrial enzymes mainly come from microorganisms. Microbial proteases for tanning are roughly divided into three categories, namely alkaline proteases, neutral proteases and acidic proteases. At present, alkaline and neutral proteases have been widely used in the dehairing and softening processes in tanning production. Some enzyme preparations or auxiliary agents for immersion, liming, degreasing and other processes have also been successfully developed in some countries, and have achieved relatively good results. Good results. However...

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Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome the defects of low acid protease activity, incomplete complex enzyme enzyme system, low antioxidant capacity, large enzyme activity loss and unsatisfactory leather softening effect in the existing leather softening compound enzyme, so as to enrich the plant protease High-activity acid protease and microbial protease as the main raw materia

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