Compound enzyme for softening leather as well as preparation method and application of compound enzyme

Abstract

The invention provides a compound enzyme for softening leather. The compound enzyme comprises the following components in parts by mass: 5-30 parts of microbial enzyme protease, 0.1 to 1.5 parts of lipase, 5-10 parts of an anti-blocking agent, 5-10 parts of a calcium chelating agent, 10-20 parts of a pH stabilizer and 30-70 parts of an inert salt diluent, wherein the microbial enzyme protease is protease derived from animal pancreas. The compound enzyme for softening the leather, provided by the invention, is prepared on the basis of the microbial protease; and through a synergistic action of the compound components such as the microbial trypsin, the lipase, the anti-blocking agent, the calcium chelating agent, the pH stabilizer and the inert salt diluent, non-structural proteins and fats in skin can be more effectively removed, the permeating and softening effects of the enzyme can be promoted, and collagenous fibers can be further loosened, so that an more ideal softening effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a microbial trypsin-based compound enzyme preparation for softening leather and its preparation method and application. Background technique [0002] In the preparatory section of leather processing, it is necessary to treat the delimed bare hide with enzyme preparations. This process is called enzymatic softening. Its main function is to remove useless things for tanning, such as epidermis, albumin, globulin, mucin And proteoglycan and other fibrous interstitial, and further loosen the structural protein fibers, so that the grain surface of the bare leather is cleaner, finer and softer, preparing for the subsequent tanning process. Enzymatic softening is one of the most important processes in the leather-making process, and it is also the only operation that cannot be replaced by chemical treatment. It has a decisive effect on the quality of the finished leather. [...

AI Technical Summary

Problems solved by technology

However, the main source of trypsin sold on the market is animal trypsin extracted from animal pancreas tissue. The application results over the years have shown that it has many defects: such as the shortage of animal pancreas raw materials, high production costs, simple extraction The industrial trypsin has complex components and heavy odor. The difference between different manufacturers or different batches of products of the same manufacturer is large, and the product stability is poor. Animal-derived trypsin has cross-infection of animal viruses and immunity to humans. toxicity, etc.

The above-mentioned defects of animal trypsin limit the development and application of bare hide enzyme softening technology in the process of tanning, making the quality of animal trypsin-based leather softening enzyme preparations unstable, and there is a risk of excessive action on the leather grain during the softening process

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