Is sheepskin genuine sheepskin?

Sheepskin is not genuine leather, but a chemical product of rawhide after a series of physical and chemical treatments (tanning). The treated leather has good air permeability and water permeability, high TS, good sanitary performance and stability. Only such leather can be used in the production of leather products. However, some unscrupulous manufacturers deliberately take the name of artificial leather as sheepskin, confusing black and white.

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Brief introduction of sheep leather:

Sheepskin production is divided into two major production processes: garment (glove) leather and shoe upper leather. In the early days of sheepskin tanning, cowhide tanning method was used, and a complete and unique production process was gradually formed in the 1960s.

Second, the process:

The production process of garment leather (glove leather) includes: liming process. Before 1950s, the skins were immersed in crocks and turned constantly, and the production cycle was 8 ~ 10 days. In 1960s, it was changed to tank liming, commonly known as the three-tank method of old ash, middle ash and new ash, and the production cycle was shortened to 6-7 days. However, the three-tank process is complicated and the product quality is not easy to control.

On 1973, Wu Lianyuan, a technician from Shanghai Jiuxin Tannery, and others switched to making rollers. By strengthening mechanical movement, the chemical reaction of leather chips was accelerated, the production cycle was shortened to 2 days, and the working hours efficiency was improved by 3 times. Tanning softening process was completed by rice bran fermentation for 2 days and nights before 1950. 1958, Wu Lianyuan transplanted calf trypsin softening method into sheepskin, which took only 2 ~ 3 hours. Although the production cycle is shortened, the grain on the leather surface is rough.

1965, Shanghai Jiuxin Tannery took the lead in softening goatskin with trypsin and protease, which made the leather surface fine and smooth, significantly improved the product quality, shortened the production cycle to 1 hour and improved the softening process of goatskin. In the process of peeling off the acid skin, the acid skin was peeled off with gray skin before 1970s, but the back was poor, which reduced the utilization rate of leather. In the early 1980s, the peeling method of transplanted cowhide was successful, which made the whole sheepskin fiber stretch flat, the leather body was plump and soft, the utilization rate increased by 5%, and the production cost was reduced.

Third, the leather industry development prospects:

Leather and its products have great market potential. The global total demand for leather is about 654.38+0 billion square meters, which is equivalent to the output of 300 million pieces of cowhide (standard leather). The output of china leather is equivalent to nearly 70 million standard leather, accounting for 23.33% of the global leather output.

However, enterprises in china leather's footwear industry and related industries should also face up to the fact that we still have shortcomings in many aspects. Although China is a big leather producer in the world, it is not a strong leather country, and it is still in a weak position in quality and value, which needs to be honed and improved in this market environment.

References:

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