Production process of chrome-free tanning and vegetable-free tanning sofa leather

Abstract

The invention provides a production process of chrome-free tanning and vegetable-free tanning sofa leather, and relates to the technical field of leather production and preparation. The production process of the chrome-free tanning and vegetable-free tanning sofa leather comprises the following specific production processes: step 1, firstly, carrying out pre-soaking to remove impurities such as dirt on the surface of raw leather, then, carrying out main soaking, and adding a rewetting bactericide, an enzyme soaking agent and an emulsification degreasing agent during main soaking; 2, sodium hydrosulfide, a liming auxiliary agent and lime are added into water, the surface of the raw leather is rubbed to achieve unhairing, then sodium sulfide, lime and an emulsification degreasing agent are added, the lime evenly permeates, the leather body swells moderately, and grease on the surface of the raw leather is emulsified and removed. The leather fibers are tightly fixed, short in pile, flat in grain surface and pure white in color, later dyeing adjustment of the leather fibers is facilitated, metal chromium pollution is avoided, the production cost of the tanning agent is reduced, and the problems that the tannin content of plants is not high, the purity is low and permeation is slow are effectively solved.

Description

technical field [0001] The invention relates to the technical field of leather production and preparation, in particular to a production process for chrome-free and vegetable-free tanned sofa leather. Background technique [0002] In the leather industry, due to the superior performance of chrome tanning, chrome tanning has been occupying a dominant position in the tanning field since its application. Because the use of the toxic chromium salt of hexavalent chromium has caused great harm to the ecological environment, humans and animals, and constituted a great threat to the survival and development of human beings themselves. In the traditional chrome tanning method, the waste chrome shavings of chrome tanning cannot be effectively utilized, resulting in a large loss of waste collagen produced in the tanning industry and serious environmental pollution. On the other hand, there is a shortage of chromium resources in my country; chromium used in tanning is almost entirely i...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a production process of chrome-free tanning and non-vegetable tanning sofa leather, which solves the problems of serious pollution of chrome tanning of leather, low purity of vegetable kneading and imperviousness to water washing

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