Processing method of crocodile back leather

Abstract

The invention relates to a tanning and processing method of crocodile back leather. In the existing crocodile back leather tanning technology, there are problems such as thick skin plate, uneven enzymatic softening, easy damage to the grain surface, high hardness of the carapace, difficulty in grinding leather, and poor softness. The present invention adopts water immersion→fleshing→scraping oil film→degreasing, preliming→scraping oil film→liming→scraping oil film→scaling brushing→deliming→scraping oil film→combined bleaching→enzyme softening→scraping oil film→combined bleaching→degreasing→salting Washing → softening of oracle bones → pickling, softening → tanning → degreasing → neutralization → retanning → dyeing, fatliquoring → hanging to dry → grinding leather → dyeing, fatliquoring → nail plate drying → finishing process, to provide the raw material skin of crocodile back processing method. The present invention has achieved major technological breakthroughs in the processes of softening, dyeing and fatliquoring, grinding, nail plate drying and other processes of crocodile back leather tanning. The scales of the finished leather are removed cleanly, the grain surface is preserved intact, and the joints between the oracle bones are soft and easy to break. The thickness is uniform, and can be used in actual production, and can be used in the production of bags and belts.

Description

technical field [0001] The invention belongs to the technical field of special leather processing, and in particular relates to a tanning and processing method for crocodile back leather. Background technique [0002] At present, there are sufficient sources of raw crocodile skin at home and abroad, but so far there have been no relevant reports on the tanning technology of crocodile back leather. In the stage of laboratory research, there are still many defects in each process, which have a great impact on the development of my country's special leather industry. For example, the traditional crocodile back skin is generally not softened, resulting in high hardness of the finished leather board, and low use and economic value; if softening is performed, it is softened in the presence of a bath, because the concentration of enzymes in the bath is small, The thickness of the skin board is large and the thickness is extremely uneven. The time required is generally more than 5 h...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a tanning and processing method of crocodile back leather, which overcomes the thick skin plate, uneven enzymatic softening and easy damage to the grain surface, high hardness of carapace, difficulty in grinding leather, and softness in the tanning process of crocodile back leather. Bad question