Is sheepskin leather real sheepskin?

Sheepskin is made of sheepskin through a series of physical and chemical treatments (tanning). Sheep leather has good air permeability and water permeability, high TS, good hygienic performance and stability.

Production technology of sheep leather;

1, liming process

Before 1950s, the liming process was to soak sheepskin in a crock and turn it constantly. The production cycle is 8 to 10 days.

In 1960s, the liming process was improved. At this time, the liming process, commonly known as the three-tank method of old ash, middle ash and new ash, was adopted, and the production cycle was obviously shortened to 6 to 7 days. However, the disadvantages of this process are round trip, complicated operation and difficult control of product quality.

1973, Wu Lianyuan of Shanghai Jiuxin Tannery changed to drum roll, which strengthened the mechanical movement, accelerated the chemical reaction of leather pieces, and greatly shortened the production cycle to two days.

2. Tanning softening process

Tanning softening was completed by rice bran fermentation before 1950, and the production cycle was 2 days.

From 65438 to 0958, Wu Lianyuan applied the softening method of bovine pancreatin to sheepskin, and the softening time was reduced to 2 to 3 hours, but the disadvantage was that the grain of leather was thicker.

1965 Shanghai jiuxin tannery softened goatskin with trypsin and protease. The produced leather has fine surface and smooth grain surface, and the production cycle is shortened to 1 hour, and the product quality is greatly improved.

3. The process of peeling the acid skin evenly

Before 1970s, the use of gray leather was uniform, but the utilization rate of leather was low because of the poor back of sheepskin.

In the early 1980 s, the method of peeling cowhide was applied to sheepskin, and the sheepskin produced was plump and soft. The utilization rate of sheepskin was increased by 5% compared with that in the 1970 s, and the production cost was obviously reduced.

Extended data:

The difference between sheepskin and artificial leather

1, touch by hand

Smooth, soft, plump and elastic feeling is dermis; But the general synthetic leather is hard, hard and soft.

2. Nose smell

All dermis has the taste of leather; Moreover, artificial leather has a strong plastic pungent smell.

Step 3: ignite

There is a pungent smell, and it is artificial leather that forms a pimple; It's genuine leather that smells like hair without induration.

4. Look at it

The pores and patterns on the dermis surface are clear; Artificial leather has no pores.

Baidu encyclopedia-sheepskin

Baidu encyclopedia-sheepskin