Fur tanning method capable of removing residual formaldehyde in fur product

A fur and tanning technology, applied in the field of tanning, can solve the problems of environmental pollution, operator injury, and the content of free formaldehyde cannot meet the national standards, and achieve the effect of reducing environmental pollution and reducing bodily harm.

Active Publication Date: 2009-12-30
天津市雄冠科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Formaldehyde is contained in many tanning agents commonly used at present, because formaldehyde is extremely easy to cause harm to the operator's body and produce environmental pollution, so it is internationally recognized as a harmful substance, and free formaldehyde will remain in fur products
Therefore, all countries have established standards for the content of free formaldehyde in fur products. The Chinese standard stipulat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1:

[0013] The fur tanning method that can remove residual formaldehyde in fur products provided by the present embodiment comprises the following steps in order:

[0014] 1) First, the raw hides are processed item by item according to the current general classification, soaking, freshening, washing, soaking again, freshening, meat removal, degreasing, softening, pickling, tanning and tanning currently used in the industry;

[0015] 2) at a temperature of 35 ° C, the above-mentioned tanned fur is added to the sulfuric acid solution with a concentration of 1.0 g / L and is pickled, the time is 2 hours, and then the skin is thrown out and water is thrown;

[0016] 3) under the temperature of 55 ℃, the fur after the above-mentioned pickling is joined in the solution that is made up of hydrogen peroxide and 1.2ml / L ammoniacal liquor that the addition amount is 10ml / L and carries out oxygen washing, the time is 6 hours, then go out and throw the skin water;

[0017]...

Example Embodiment

[0019] Example 2:

[0020] The fur tanning method that can remove residual formaldehyde in fur products provided by the present embodiment comprises the following steps in order:

[0021] 1) First, the raw hides are processed item by item according to the current general classification, soaking, freshening, washing, soaking again, freshening, meat removal, degreasing, softening, pickling and tanning currently used in the industry;

[0022] 2) at a temperature of 38 ° C, the above-mentioned tanned fur was added to the sulfuric acid solution with a concentration of 1.1 g / L and was pickled, and the time was 2 hours, and then the skin was thrown out and water was thrown;

[0023] 3) under the temperature of 55 ℃, the fur after the above-mentioned pickling is joined in the solution that is made up of hydrogen peroxide and 1.2ml / L ammoniacal liquor that the addition amount is 10ml / L and carries out oxygen washing, the time is 6 hours, then go out and throw the skin water;

[0024]...

Example Embodiment

[0026] Example 3:

[0027] The fur tanning method that can remove residual formaldehyde in fur products provided by the present embodiment comprises the following steps in order:

[0028] 1) First, the raw hides are processed item by item according to the current general classification, soaking, freshening, washing, soaking again, freshening, meat removal, degreasing, softening, pickling and tanning currently used in the industry;

[0029] 2) at a temperature of 40 ° C, the above-mentioned tanned fur is added to the sulfuric acid solution with a concentration of 1.2 g / L to carry out pickling, the time is 2 hours, and then the skin is thrown out and water is thrown;

[0030] 3) under the temperature of 55 ℃, the fur after the above-mentioned pickling is joined in the solution that is made up of hydrogen peroxide and 1.2ml / L ammoniacal liquor that the addition amount is 10ml / L and carries out oxygen washing, the time is 6 hours, then go out and throw the skin water;

[0031] 4...

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PUM

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Abstract

The invention discloses a fur tanning method capable of removing residual formaldehyde in fur products. The fur tanning method is as follows: after the process in the current commonly used fur tanning method of the industry, the processes comprising pickling, oxidizing washing and removal of residual formaldehyde in peltry in the removing and tanning processes are added; the reaction among sodium hydrosulfite used as reducing agent and hydrogen peroxide with oxidization and formaldehyde and the pro-nuclear reaction between sodium sulfite and formaldehyde are utilized to change the molecular structure of formaldehyde, thereby denaturing and removing free formaldehyde. The content of free formaldehyde in prepared fur products is less than 20ppm, thereby not only meeting the national standards, but also reducing hazards to operators and environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of tanning, in particular to a fur tanning method capable of removing residual formaldehyde in fur products. Background technique [0002] In the tanning industry, the qualitative change process of turning raw hide into leather is called tanning. Among them, raw hides mainly include sheepskin, rabbit skin, mink skin, fox skin, cowhide, horse skin, etc. The tanned fur products can be used to make civilian products such as clothing, shoes and hats, car cushions, and indoor sheep shearing blankets. The chemicals used in the tanning process are called tanning agents. Many tanning agents commonly used at present all contain formaldehyde, because formaldehyde is extremely easy to cause harm to the operator's health and produce environmental pollution, so it is internationally recognized as a harmful substance, and free formaldehyde will also remain in fur products. Therefore, all countries have established stand...

Claims

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Application Information

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IPC IPC(8): C14C3/32
CPCY02W30/50
Inventor 何玉祥张瑾赵鑫
Owner 天津市雄冠科技发展有限公司
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