A kind of production process of foam soft full-grain flat leather

Abstract

The invention relates to the technical field of leather production technology, and provides a production process of foam soft full-grain flat leather, using low-grade heavy cowhide as raw material, breaking through the traditional wet dyeing and finishing process framework, and after softening process Carry out the first neutralization and filling, then carry out chrome retanning, and then carry out the second neutralization and filling. At the same time, a certain amount of oil is added in the softening, neutralization and filling processes. Filling materials are selected to finally produce high-quality, high-utility full-grain flat leather with good softness, good foaming feeling, uniform and fine grain surface, and no obvious part difference, which effectively solves the problem of low-grade heavy cowhide in the processing process. The existing problems such as rough grain, obvious disability, large grain, and low utilization rate can reduce the production cost of high-quality, high-utilization foam soft full-grain flat leather, and improve the utilization rate of low-grade cowhide. The value of finished leather brings considerable economic benefits to the enterprise.

Description

technical field [0001] The invention relates to the technical field of tanning chemistry and engineering, in particular to a production process for foam soft full-grain plane leather. Background technique [0002] Cowhide is currently the most important raw material in the tanning industry. According to the quality of raw material, it can be divided into light weight, heavy weight and super heavy weight. Generally speaking, raw hides with higher quality have a larger width. Among them, the low-grade heavy raw material leather, the wet blue leather processed by tanning has more grain defects, poor pore uniformity, and obvious wrinkles on the neck and abdomen of the wet blue leather, and there are certain parts. . [0003] According to the characteristics of low-grade heavy wet blue leather, it is usually used to make embossed wrestled leather. Carry out damage repairing, grain modification, surface grinding and other operations on the crust leather, and the damage repair r...

AI Technical Summary

Problems solved by technology

[0004] Therefore, in view of above-mentioned problem, the present invention proposes a kind of foam soft full-grain planar leather production technology, the production technology of described foam soft Napa leather uses low-grade heavy cowhide as raw material skin, breaks through the traditional wet state Dyeing and finishing process framework, after the softening process, carry out the first neutralization and filling, then carry out chrome retanning, and then carry out the second neutralization and filling, and at the same time add a certain amount of Grease, in the filling process, mainly use materials with selective filling properties, and finally produce high-quality, high-utility full-grain flat leather with good softness, good foam feeling, uniform and fine grain surface, and no obvious position difference. Effectively solve the problems of rough grain, obvious disability, large grain, and low utilization rate in the processing of low-grade heavy cowhide, and reduce the production of high-quality, high-utilization foam soft full-grain flat leather for enterprises Reduce costs, increase the utilization rate of low-grade cowhide and the value of finished leather, and bring considerable economic benefits to the enterprise