Leather production technique

Abstract

The invention discloses a leather production technique. The leather production technique comprises the following steps: material selecting, i.e., selecting a leather material; re-tanning, i.e., re-tanning the leather material; base coating, i.e., carrying out prime coating by using a coating obtained by dissolving cationic wax and epoxy resin in water and carrying out drying by baking; tumbling ironing, i.e., performing tumbling ironing by use of a tumbling mill; middle coating, i.e., carrying out middle coating by using a coating obtained by dissolving leather-bonding epoxy resin in water and carrying out drying by baking; top coating, i.e., carrying out top coating by using a coating obtained by dissolving epoxy resin, acrylic resin, leather cracking resin and leather pigment in water and carrying out drying by baking; water washing, i.e., carrying out washing with water; dyeing, i.e., dyeing the surface of the leather material; fat-liquoring, i.e., carrying out fat-liquoring coating on the surface of the leather material; and drum milling, i.e., carrying out drum milling to obtain a finished leather product. The produced leather is good in flex resistance and not prone to crease in wearing and use processes.

Description

technical field [0001] The invention relates to the field of leather production, in particular to a leather production process. Background technique [0002] Animal fur can resist wind and cold, has good air permeability, and has a decorative effect, but it is expensive, has a large processing loss and is not easy to maintain. As people's awareness of environmental protection is increasing, it is the general trend to replace animal leather with artificial leather. [0003] The processing process of traditional leather is generally as follows: (1) Preparation process: remove the useless materials (such as hair, epidermis, fat, fibrous interstitium, subcutaneous tissue, etc.) and loose collagen fibers in the raw hide to prepare for tanning; (2) ) Tanning process: it is a qualitative change process that turns raw hide into leather, and is the key to the entire leather processing process. The tanned leather can obtain a series of tanning effects. [0004] (3) Finishing process...

AI Technical Summary

Problems solved by technology

[0006] In the traditional leather production process, the chrome tanning method is used, which pollutes the environment and harms the human body greatly; the method of spraying the bottom paste puts a lot of pressure on the spraying machine and needs to use more chemicals

In the traditional process, spraying 5000SF leather embryo three times needs to consume 80kg of chemical materials, which is very costly