What is leather degreasing? What surfactant is used for leather degreasing?

Degreasing is an important process in leather processing. Remove the fat and grease produced by leather in the process of animal life, and properly disperse collagen fibers to prepare for the later process. Surfactant degreasing is gradually replacing solvent degreasing because of its low cost, non-toxicity and high safety. Surfactant degreasing requires that surfactant has excellent permeability and emulsification, so that it can penetrate into fat cells or fat glands after entering rawhide, emulsify and dissolve fat and return it to solution.

Through the penetration, emulsification and degreasing tests of various surfactants, it is found that FA-6 has excellent wetting permeability and excellent emulsification and degreasing performance for animal fats and oils.

Wettability and permeability of 1

Compared with JFC and OEP-70, FA-6 has almost no contact angle with hard surface and has a wide spreading range. FA-6 has better wettability and permeability than JFC and OEP-70.

2 Dissolution rate and emulsifying performance

Ultrasonic degreasing of solid lard, the results are as follows. Judging from the size of suspended solids on the surface, FA-6 solution has small particles on the surface, while AEO-9 and NP- 10 solution have massive oil on the surface, which shows that FA-6 has excellent emulsification, solubilization and strong dispersibility for animal oil.

3 Degreasing performance

NP- 10, AEO-9 and FA-6 were selected for pigskin degreasing test, and the cost was the same. See table 1 for the results. FA-6 is obviously superior to NP- 10 and AEO-9 in pigskin degreasing.

Table 1 Comparison of degreasing power of pig sebum

FA-6 has excellent permeability, emulsification and degreasing. When used for leather degreasing, it can greatly improve the clean degreasing power of leather. FA-6 can also be used in detergents with high degreasing performance, such as wool cleaner and feather cleaner.