Comprehensive tanning agent for furs and no-dry-washing and no-chromium tanning process thereof

Abstract

The invention provides a comprehensive tanning agent. The comprehensive tanning agent is prepared from the following components in parts by mass: 10-20 parts of THPC (Tetrakis Hydroxymethyl Phosphonium Chloride) tanning agent, 2-3 parts of fatting agent, 70-90 parts of NaCl, 5-10 parts of silicon-aluminium tanning agent and 2000-3000 parts of water. The invention also provides a no-chromium tanning process of the furs. The comprehensive tanning agent provided by the invention has the beneficial effects that the novel comprehensive tanning agent combined with the silicon-aluminium THPC is adopted, the THPC is firstly used for pre-tanning, and new intermolecular bonds are formed in a collagen structure, so that the strength of collagen fiber bundles can be improved, the fiber can be primarily sized and the shrinking temperature can be increased; then the silicon-aluminium tanning agent is used for re-tanning, so that the shrinking temperature of a leather board can be further increased,the insufficient pre-tanning can be supplemented, the plumpness and the fullness of the leather board can be improved and the quality requirements of a finished product for the leather board can be met; due to no adoption of the chromium tanning agent, the condition of existence of chromium liquid on the furs is also avoided; the method is simple and is suitable for application and promotion in industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of fur treatment and processing, and relates to a comprehensive tanning agent and a chrome-free tanning process for fur, in particular to a comprehensive tanning agent for fur and a non-dry cleaning chrome-free tanning process for fur. Background technique [0002] Leather processing has a history of thousands of years. After a long period of development, tanning has developed from a simple manual operation to an important industrial technology field. Since the early 1980s, my country's leather industry has developed by leaps and bounds, and it has become one of the most important leather and leather product production centers in the world. my country's cowhide, pigskin, sheepskin and other resources rank first in the world, and its annual output of light leather ranks first in the world, accounting for more than 20% of the world's total. Moreover, the leather industry is constantly becoming a characteristic...

AI Technical Summary

Problems solved by technology

[0005] However, for fur, due to its special structure consisting of two parts of the coat and the leather plate, it is more difficult to process, especially the tanning process. The existing process is usually chrome tanning, using a large amount of chrome Chromium powder not only consumes chromium resources, but also causes heavy metal pollution in water. The finished leather will also contain chromium, which will also cause quality problems in the chromium solution, and will become carcinogenic hexavalent chromium under external conditions.

At the same time, fur, especially sheepskin, contains a lot of oil, which is prone to mildew if it is not removed. Traditionally, organic solvents (tetrachlorethylene or white oil, etc.) are used to remove it by dry cleaning, which not only requires high equipment investment, but also takes up Land, high cost, organic solvents are flammable and explosive, volatilize into the air and cause pollution. damaged

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