A kind of preparation method of natural denim effect leather

Abstract

The invention discloses a method for preparing natural cowboy effect leather, which at least includes the following steps: wet blue leather squeezed, smoothed, weighed, pretreated, retanned and filled, fatliquored, surface dyed, and finished; The specific steps of the treatment process are: add 100-300 parts of water, 1-3 parts of silane coupling agent into the drum, and rotate; then add 1-5 parts of modified silica gel, and rotate; finally add 1-4 parts of neutralizing agent , rotate, adjust the pH of the bath solution to 6.0-7.0, drain and wash; the preparation method of the natural denim effect leather of the present application is pretreated by using silane coupling agent and modified silica gel, adopting the rapid dyeing technology of the end surface, and The filling and fatliquoring process is designed with reasonable matching, so that the prepared natural denim effect leather is soft, plump and foamy, giving the appearance of denim and two-color effect, eliminating the need for the compound operation of leather and cloth in the prior art, and simplifying the operation The process solves the problems of poor bonding between the two and the impact on product performance.

Description

technical field [0001] The invention relates to the technical fields of tanning chemistry and tanning engineering, in particular to a preparation method of natural denim-effect leather. Background technique [0002] At present, the leather market at home and abroad is sluggish, and the development of the industry has encountered bottlenecks. The performance of leather products is single, and the phenomenon of homogeneity is becoming more and more serious, which cannot meet the growing individual needs of people and the special performance requirements of different fields. Therefore, breaking through the shackles of conventional products and developing new special effect leather products is one of the inevitable choices for the leather industry to break through the predicament and stabilize the market. [0003] Natural cowboy effect leather is a special effect leather product with a very unique style. Its appearance has a cowboy effect, is fashionable, high-end, atmospheric, ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a method for preparing natural denim-effect leather, which solves the problems of combining leather and cloth in the prior art, the two are not firmly bonded, and the process is cumbersome; the present application can produce denim without borrowing cloth Leather, and the silane coupling agent and modified silica gel are used in the pretreatment process. There is a synergistic effect between the two materials. The suppleness and grain opening effect of the silane coupling agent is combined with the dispersion fiber and crosslinking function of the modified silica gel. Promote the opening of fibers and increase the area, so that the grain surface of the crust leather is soft and thin, and the body bone is soft but not loose, thus eliminating the softening and chrome retanning processes, simplifying the process flow, greatly reducing chromium and COD pollution, and reducing waste Liquid Handling Difficulty

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