Method for producing chamois leather using epoxidized oil

Abstract

The invention belongs to leather process technology, in particular a method for producing chamois leather using epoxidized oil, comprising the following steps: putting the pretanned pelt or fur into the normal temperature controlled rotary drum, adding alkaline solution to adjust pH value into alkaline, draining the alkaline solution, and adding catalyst or accelerant and epoxidized oil into the rotary drum, keeping the temperature at a certain temperature for several times, after reacting, recycling the remaining oil, then washing using degreasant and / or alkali, then adjusting pH value, aluminum tanning, aldehyde tanning or other tanning, and then drying, dampening and milling, finally gaining the chamois leather. The invention enables epoxidized oil to directly react with collagen and fix oil on the hide fiber, so that the shortcoming that traditional oil tanning takes oil as raw material, instead of reactant is overcome, and oil oxidizing process of traditional chamois leather is omitted. The chamois leather produced by the method has advantages of high intensity, good flexibility, strong hygroscopicity and water-wash resistance, applicable for the leather for cleaning, filtering and washing clothes.

Description

technical field

[0001] The invention relates to a method for producing oil-tanned leather by using epoxidized oil, belonging to the light industry. Background technique

[0002] Oil-tanned leather, also known as antelope or suede. It has some unique properties: the finished leather fiber is fine, the leather body is soft, plump, and the specific gravity is light (0.3-0.4Kg / m 3 ), high elongation (45%, 1Kg / mm 2 ), ability to wash with water and soap solution. Can be used in clothing, gloves, leather shoes. Due to its outstanding porosity and strong air permeability, it can be used to filter aviation gasoline, wipe optical glass and precision instruments, etc. The surface of oil-tanned leather is lipophilic, but it can absorb 400% to 600% of its own weight of water. After absorbing water and wringing out, it still contains about 180% of water. When used to clean the surface of polished objects, it can quickly absorb water droplets and moisture on the surface of the object...