Simple cow split leather color changing technology

Abstract

The invention discloses a simple cow split leather color changing technology which comprises the steps of cow split leather weighing, water returning, decolorization, retanning, dyeing, liquid expansion, color fixation and emergence and stacking. The raw materials are semi-finished leather blanks, scientific processing is carried out, technological parameters are reasonably controlled, the decoloration degree of the leather blanks is high, the cow split leather is bright and uniform in color, soft and comfortable after dyeing is carried out again, a leather board is solid, and no adverse influence is produced on the fiber strength. By carrying out decolorization and retanning on the semi-finished cow split leather blanks, the leather blanks can be recolored again, and the product is non-toxic and environmentally friendly. The simple two-layer cow leather color changing technology can be applied to secondary production of leather, a new path is developed for secondary utilization of the leather blanks, the flexibility and safety of business operation can be greatly improved, and the economic benefits and social benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of tanning technology, and more specifically relates to a simplified color-changing process of two-layer cowhide. Background technique [0002] After decades of rapid development, my country's leather industry has become a pillar industry of the light industry, and at the same time, my country has also become the world's first leather production and trade base. However, the international market is unpredictable, the domestic tanning industry is greatly affected by the international economic situation, and the financial crisis is still turbulent. Many tanneries have been hit hard due to customer order cancellations and inventory backlogs. In order to eliminate inventory and calmly respond to market changes, dyed leather blanks must be reprocessed to bring them back to the market. And the primary problem that occurs at this time is exactly the need to carry out good decolorization treatment to the semi-finish...

AI Technical Summary

Problems solved by technology

The previous fading process was rarely adopted by tanning enterprises due to its high cost, complicated operation, and great impact on the quality of finished leather.