Energy-saving and environmental-protection method for tanning raccoon fur

Abstract

The invention discloses an energy-saving and environmental-protection method for tanning a raccoon fur, which is characterized by adopting the following processes: (1) shunting and grouping; (2) soaking: preparing a soaking solution which contains a wetting fungicide HAC, a soaking enzyme E38, a degreasing agent S-40 and salts; (3) removing meats by water scalping; (4) re-soaking: preparing a re-soaking solution which contains the wetting fungicide HAC, Supralan80, degreasing agent S-50 and salts; stirring while throwing furs; and taking out of the furs and drying; (5) shaving and deep scalping: cutting off the pachydermia part of the fur to cause each part of the fur to have even thickness; (6) softening and pickling: preparing a softening pickling liquor which contains softening enzyme E40, sulfuric acid, Pelgrassol LP, anhydrous sodium sulfate, JFC, salts, formic acid, Eskatan GLS and fatliquoring agent FSE; throwing the furs into the softening pickling liquior for stirring; and then taking out of the furs and leaching; (7) tanning: preparing a tanning solution which contains tschermigite, JFC, salts, mirabilite, auxiliary tanning agent P-3B and fatliquoring agent FSE; stirring while throwing the furs; successively adding NovaltanPF and aluminium tanning agent AL, adding baking soda, stirring, adding the fatliquoring agent FSE and taking out of the furs; and (8) arranging for later stage. The invention has simple processes, reduces manpower consumption, improves use efficiency and saves usage amount of chemical materials and water.

Description

Technical field [0001] The invention belongs to the field of leather processing, in particular to a method for tanning mink fur. Background technique [0002] In the prior art, the traditional raccoon skin tanning process is as follows: [0003] 1. Divide into batches → 2. Soak in water → 3. Remove meat with water shovel → 4. Re-soak in water → 5. Shave evenly with large shovel → 6. Degrease → 7. Soften → 8. Soak in pickling → 9. Tanning → 10. Medium and → 11. Post-finishing. [0004] Process description: [0005] 1. Separate batching: the raccoon skins are divided into batches according to dry skin and fresh skin, and the skins without processing value are sorted out and processed separately. [0006] 2. Soaking in water: Put the chemical materials into the pool or trough according to the process conditions and stir evenly, then put the skins into different pools or troughs according to the dry skin and fresh skin, and drain the water until the skins are completely subme...

AI Technical Summary

Problems solved by technology

[0030] The traditional raccoon skin tanning process has the following deficiencies: 1. The liquid used in the four processes of immersion, re-immersion, degreasing and neutralization (referring to the solution of chemical material and water, the same below) is all processed once after a batch is processed. The cycle of liquid recycling in the three processes of softening, pickling and tanning is also relatively short. After processing three to four batches, the liquid needs to be replaced, and the utilization efficiency of the liquid is relatively low; 2. Each The number of batches of skins is small, and the liquid ratio of each process is relatively large, resulting in the waste of chemical materials and water. The water consumption of each skin is about 80-100L; ;4. The amount of sewage produced is large, and each piece of leather produces about 70-90L of sewage after tanning; 5. The tanned hides contain a certain amount of harmful chemicals, which are easy to cause harm to the human body

The discharged sewage contains a large amount of harmful residues and is difficult to purify; 6. The leather board after tanning is not soft, lacks fullness, the wool is not flexible, and the color is not bright

The load elongation of the skin is small, and the tensile strength is relatively low