Sponge foam soft-type full-grain flat leather production process

Abstract

The invention relates to the technical field of leather manufacturing process, and provides a sponge foam soft-type full-grain flat leather production process. According to the sponge foam soft-type full-grain flat leather production process, low-grade heavy-weight cowhide is used as raw leather, a traditional wet dyeing and finishing process framework is broken through, first neutralization and filling is carried out after a softening process, then chrome retanning is carried out, second neutralization and filling is carried out, meanwhile a certain amount of grease is added in the softening,neutralization and filling processes, and materials with selective filling are mainly adopted in the filling process to finally prepare the high-quality and high-utilization full-grain flat leather with good softness, good foam feeling, a uniform and fine grain surface and no obvious position difference. The sponge foam soft-type full-grain flat leather production process effectively solves the problems of coarse grain surfaces, obvious disability, large grain size, a low utilization rate and the like existing in the processing process of the low-grade heavy-weight cowhide, reduces the production cost of manufacturing high-quality and high-utilization sponge foam soft-type full-grain flat leather for enterprises, improves the utilization rate of the low-grade cowhide and the value of finished leather, and brings considerable economic benefits to the enterprises.

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