Rex rabbit fur cleaning production tanning process

A clean production and fur technology, applied in leather manufacturing, small raw hides/large raw hides/leather/fur processing, small raw hides/large raw hides/leather/fur mechanical processing, etc. Emissions, reduced water consumption, effects of good conditions

Inactive Publication Date: 2018-12-14
桐乡市鑫诺皮草有限公司 +1
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The invention discloses a rex rabbit fur cleaning production tanning process, and relates to rex rabbit fur cleaning production tanning processes. The process sequentially comprises the following steps of (1) carrying out soaking, (2) removing meat, (3) carrying out degreasing, (4) carrying out pickling and softening, (5) carrying out re-pickling, (6) carrying out tanning, (7) carrying out fur discharging and water controlling, and then carrying out neutralization and fat adding as well as subsequent drying finishing operation. In the degreasing step, a degreasing solution is used as a solution for soaking treatment; and treatment solutions of the soaking and softening step, the re-pickling step and the tanning step can be repeatedly reused. Compared with traditional fur chrome tanning andaldehyde tanning technologies, a formaldehyde-free chrome-free tanning technology is adopted, the method that the treatment solutions are repeatedly used is adopted, therefore, the fur tanning process can save chemical raw materials by 60% or more, and the water consumption can be reduced; the emission of harmful substances can be reduced, and no formaldehyde and chromium elements are contained in the sewage; and moreover, a fur white board of a fur treated by adopting the process is white, and better conditions are provided for dyeing.

Application Domain

Leather manufacturingTanning treatment +1

Technology Topic

ChromiumFormaldehyde free +7


  • Experimental program(1)

Example Embodiment

[0020] Example
[0021] The clean production tanning process of Rex rabbit fur involved in this embodiment includes the following steps in sequence: (1) soaking in water, (2) meat removal, (3) degreasing, (4) pickling and softening, (5) repickling, ( 6) Tanning, (7) peeling and water control, then carry out neutralization and fatliquoring and subsequent dry finishing operations.
[0022] In the soaking step, the otter rabbit fur is placed in a solution at room temperature for 6-12 hours, and the solution in this step contains 0.5-1.5 ml/L penetrant. The penetrant used is the penetrant JFC produced by Zibo Haijie Chemical. Penetrating agent can increase the penetration of degreasing agent on fur, and using degreasing is more thorough.
[0023] In the meat removal step, use a circular knife machine and a steel wire machine to remove the meat until the skin has no meat residue, the skin shape is complete, and there is no process injury. Lay the foundation for subsequent degreasing, pickling softening and tanning.
[0024] In the degreasing step, the fur after the meat removal step is placed in a degreasing solution, which contains 1-3 ml/L of degreasing agent and 0.5-1.5 g/L of soda ash, and the degreasing time is 1-2 hours. The degreasing solution treated in this step can be used in the soaking step, which can save production water and avoid the consumption of chemical raw materials.
[0025] In the pickling and softening step, the fur after the degreasing step is placed in a water temperature of 36-38°C, containing 35-45g/L salt, 1.5-2.5ml/L formic acid, and a pH value of 2.8-3.5 In the solution: 1.5-2.5 hours later, 4-8 units/L of acid enzyme is added, and the treatment time is 8-12 hours. The role of acid enzymes is to soften the fur.
[0026] The solution after soaking and softening step can be reused. Add 60% of the original acid enzyme in the first reuse, add 40-50% of the original acid enzyme in the second reuse, add 20-30% of the original acid enzyme in the third and subsequent reuse; the amount of salt is the amount of the original salt 10-15%. Reuse can reduce the consumption of chemical raw materials and production water, and can also reduce the discharge of sewage and avoid the discharge of harmful substances in wastewater.
[0027] In the re-pickling step, the fur after the pickling and softening step is placed in a room temperature solution containing 55-65g/L salt, 3-5ml/L formic acid, and 2-4ml/L sulfuric acid for 12-16 hours. The solution after the re-immersion acid step can be reused. For the first reuse, add 1-2g/L formic acid and 1-1.5g/L sulfuric acid. For the second time and after each reuse, add 1g/L formic acid and 1g/L sulfuric acid. And there is no need to add salt during the entire recycling process.
[0028] In the tanning step, at room temperature, the fur after the re-pickling step is placed in the skin containing 5-65g/L salt, 3-5ml/L formic acid, 2-4ml/L sulfuric acid, 4-6ml/L lactic acid, 8 -15g/L polymetallic tanning agent solution, add 2-4g/L sodium formate after 8-12 hours, add 2-4g/L baking soda after 20-40min, add 2-4g/L soda ash after 20-40min, The final pH value is 3.8-4.5, and it is heated to 40-45°C for alkali extraction. The polymetallic tanning agent is an aluminum-zirconium-titanium tanning agent, which is a chrome-free tanning agent.
[0029] The solution after the tanning step can be reused for tanning of fur. Add 0.5-2ml/L of sulfuric acid, 1ml/L of formic acid, 1-2ml/L of lactic acid, and 4-8g/L of multi-gold tanning for each reuse. When using the reused solution to treat fur, the parameters of the alkali extraction process are the same as before. Reuse can reduce the use of chemical raw materials and water consumption.
[0030] After the otter rabbit fur is tanned, it is peeled out, the water is controlled, and then the neutralization and fatliquoring and subsequent dry finishing operations are performed. These operations are the same as the existing operations.
[0031] In the clean production tanning process of otter rabbit fur involved in the present invention, in the degreasing step, the degreasing solution is used as the solution for the soaking treatment; the treatment solutions of the pickling softening step, the re-pickling step and the tanning step can all be reused many times. Reduce the use of chemical raw materials, and after calculations in actual production, more than 60% of chemical raw materials can be saved. Multiple reuse can reduce water consumption and waste water discharge.
[0032] In the present invention, an aluminum-zirconium-titanium tanning agent is used instead of a chrome tanning agent, so that no chromium compound is used in the process involved in the present invention, so that the wastewater does not contain chromium. No aldehyde tanning process, no formaldehyde in waste water and fur.
[0033] Moreover, the shrinkage temperature of the rex rabbit fur treated by the clean production tanning process of the rex rabbit fur involved in the present invention reaches above 90°C, and the treated rex rabbit fur can be directly dyed at high temperature, so that the color fastness of the dyeing of the rex rabbit fur is higher. Does not fade easily.


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