Acid swelling treatment method of sheep hide

Abstract

The invention discloses a sheep leather acid swelling treatment method. The method comprises a step of acid swelling and a step of de-swelling, wherein the acid swelling is carried out in an acidic swelling liquid, and the swelling is uniform and appropriate without hair dropping or excess leather loss; and the de-swelling is carried out in a de-swelling liquid, the de-swelling effect is very good, and a state before swelling can be completely recovered. Collagen fibers can be effectively loosened and elastic fibers and muscle tissues are digested to a certain degree through the acid swelling treatment. Compared with fur prepared through routine methods, fur prepared through the method disclosed in the invention has the advantages of obviously improved softness and fullness, elasticity, nearly 3-time improvement of the tensile strength, 20% reduction of the unit mass, obviously improved shrinkage temperature, and elimination of the sheep fur layering phenomenon. All the performance indexes of finished sheep fur accord with the Light Industry Standard of the PRC (QB / T1280-1991), and the finished sheep fur also has the characteristics of thinness, lightness, and softness.

Description

technical field [0001] The invention belongs to the field of fur inventions. Background technique [0002] Sheep fur has good warmth retention and practicality, and is widely used as coat liner, seat cushion, winter hat lining, and fur coat, etc. Especially after special processing, it can be imitated into other valuable furs, but the price is relatively low, and it is widely loved by the public. With the improvement of people's consumption level and the continuous development of the fur industry, people's requirements for sheep fur are not limited to warmth and cold protection, but more attention is paid to wearing comfort and functionality, such as the lightness, softness, lightness and natural warmth of fur. Fur products that are good but very heavy, inconvenient to carry, or have no special function are no longer popular. (See Liu Lan, Populus euphratica, Dan Weihua, etc., The Functional Effects of Leather and Fur, "China Leather", 2012, 41 (5): 44) Compared with the p...

AI Technical Summary

Problems solved by technology

However, the fur cannot be subjected to alkali expansion, because the use of alkali expansion will cause a large area of ​​hair loss

On the other hand, alkali can cause great damage to the wool cover. The main component of sheep wool is keratin, and alkali can hydrolyze keratin, which will reduce the strength and warmth retention of wool

The second is enzymatic softening, which weakens the role of elastic fibers and arrector pili muscles in the skin tissue structure, and separates loose collagen fibers, but the controllability is poor. If the treatment is too light, the effect of loose skin collagen fibers cannot be achieved, and the hand feels stiff; If it is too heavy, the collagen will be overly hydrolyzed, hair loss, skin plate delamination and other phenomena will appear, and it is difficult to achieve the expected effect

[0004] To sum up, the existing technology cannot achieve sufficient and moderate separation and loosening of the collagen fibers of sheep skin, so it is impossible to produce high-quality thin, light and soft sheep fur, and another method must be found