Method for forming pebble-grain surface of cowhide leather

Abstract

The invention provides a method for forming pebble-grain surface of cowhide leather. The method comprises the following steps: 1) placing blue leather in a drum; adding water, oxalic acid and sulfated ester compounds; rotating the drum; and carrying out water discharge, water washing and water exchange; 2) adding water and aliphatic series polyaldehyde; rotating the drum; neutralizing with alkali; adding crylic acid and grease; rotating the drum; and carrying out water discharge, water washing and water exchange; 3) adding water, crylic acid, a synthetic tanning agent, dispersed tannin, a mimosa extract, a quebracho extract and a dye and rotating the drum; 4) dying through the core with the dye, then adding melamine, dicyandiamide, the mimosa extract, the quebracho extract, grease and a pebble forming agent; rotating the drum; and solidifying acid and exchanging water; and 5) adding water, crylic acid and grease and rotating the drum; solidifying acid; carrying out water discharge, water washing and water exchange; 6) adding water and oil-wax fatliquor, and 7) carrying out dry finishing. By the method, a pebble effect can be naturally exerted on the grain surface of the leather and the potential added value of the leather is expanded.

Description

technical field [0001] The invention relates to a method for forming a cowhide bubble grain surface. Background technique [0002] The grains produced by the existing tanning methods are either full-grained and flat, with little covering effect; or embossed, which changes the natural effect of the leather grain in order to cover the wounds, and lacks the texture of the leather. Natural and beautiful; either by grinding the leather to remove the epidermis, so that consumers cannot distinguish it as genuine leather, and reduce the grade of leather products, thereby reducing the economic value and use effect. content of the invention [0003] The object of the present invention is to provide a method for forming the bubble grain surface of cowhide. This method can naturally form the bubble effect on the leather grain surface without grinding or embossing, and maintains the full grain surface, but the bubble It also covers the disability and has a beautiful three-dimensional ...

AI Technical Summary

Problems solved by technology

[0002] The grains produced by the existing tanning methods are either full-grained and flat, with little covering effect; or embossed, which changes the natural effect of the leather grain in order to cover the wounds, and lacks the texture of the leather. Natural and beautiful; or by grinding the leather to remove the epidermis, so that consumers can't tell it's genuine leather, and reduce the grade of leather products, thereby reducing the economic value and use effect