Preparation of high-grade sheep clothing wool leather with chrome-free polymetallic tanning agent

A multi-metal and tanning agent technology, which is applied in the direction of leather dipping, chemical treatment before tanning, small raw hide/large raw hide/leather/fur treatment, etc., can solve the problems of aluminum tanning that is not washable, vegetable tanning and organic tanning, etc. Chromium waste is harmful and other problems

Active Publication Date: 2021-07-06
浙江中辉裘革科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a technology for preparing high-grade sheep clothing wool leather using chrome-free multi-metal tanning agents, so as to solve the problems of the existing chromium wastes, which are harmful to aluminum tanning, water-resistant tanning, and aldehyde tanning. Insufficiency of storage, poor hand feeling of vegetable tanning and organic tanning, etc.

Method used

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  • Preparation of high-grade sheep clothing wool leather with chrome-free polymetallic tanning agent
  • Preparation of high-grade sheep clothing wool leather with chrome-free polymetallic tanning agent
  • Preparation of high-grade sheep clothing wool leather with chrome-free polymetallic tanning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A non-chromium-free multi-metal tanning agent prepares high-grade sheep garment taking craft, including the following steps:

[0068] Step one, loathe,

[0069] Step two, dry,

[0070] Step three, cut hair,

[0071] Step four, main immersion,

[0072] Step 5, go to the meat,

[0073] Step six, degreasing,

[0074] Steps 1 to step six are all conventional processes.

[0075] Step 7, soften the ratio of the softening acid is:

[0076] Weak organic acid Bascal S (BSAF) 1.2 g / L,

[0077] Acid softease DVP (De Rui Leather Technology) or acid softening enzyme WB (De Rui Leather Technology) 4 g / L,

[0078] Industrial salt 20 g / L,

[0079] The rest is water.

[0080] Proceed as follows:

[0081] First, the fur is added to the softening tissue, and the amount of the softening acid solution is 30 ° C in the amount of water in the softening apphavilion, the adjustment temperature is 40 ° C, treated 10 h, and accompanied by intermittent rotation, rotation hourly 6min;

[0082] Th...

Embodiment 2

[0119] A non-chromium-free multi-metal tanning agent prepares high-grade sheep garment taking craft, including the following steps:

[0120] Step one, loathe,

[0121] Step two, dry,

[0122] Step three, cut hair,

[0123] Step four, main immersion,

[0124] Step 5, go to the meat,

[0125] Step six, degreasing,

[0126] Steps 1 to step six are all conventional processes.

[0127] Step 7, soften the ratio of the softening acid is:

[0128] Weak organic acid Bascal S (BSAF) 2 g / L,

[0129] Acid softease DVP (De Rui Leather Technology) or Acid Soft Enzyme WB (De Rui Leather Technology) 1 g / L,

[0130] Industrial salt 23 g / L,

[0131] The rest is water.

[0132] Proceed as follows:

[0133] First, the fur is added to the softening appachant acid, and the amount of the softening acid is carried out in accordance with the mass ratio of water and the mass ratio of the fur in the softening tissue, and the adjustment temperature is 30 ° C, treated for 14 h, and accompanied by interm...

Embodiment 3

[0171] A non-chromium-free multi-metal tanning agent prepares high-grade sheep garment taking craft, including the following steps:

[0172] Step one, loathe,

[0173] Step two, dry,

[0174] Step three, cut hair,

[0175] Step four, main immersion,

[0176] Step 5, go to the meat,

[0177] Step six, degreasing,

[0178] Steps 1 to step six are all conventional processes.

[0179] Step 7, soften the ratio of the softening acid is:

[0180] Weak organic acid Bascal S (BSAF) 1 g / L,

[0181] Acid softease DVP (De Rui Leather Technology) or Acid Soft Enzyme WB (De Rui Leather Technology) 2 g / L,

[0182] Industrial salt 30 g / L,

[0183] The rest is water.

[0184] Proceed as follows:

[0185] First, the fur is added to the softening appachant acid, and the amount of the softening acid solution is 20 ° C in the softening tissue, the adjustment temperature is 35 ° C, the treatment 24 h, and accompanied by intermittent rotation, rotation hourly 5min;

[0186] Then, in which a dip ac...

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Abstract

The invention relates to the technical field of wool leather processing, in particular to a process for preparing high-grade sheep clothing wool leather with a chromium-free multi-metal tanning agent. , tanning, wet grinding, retanning, neutralization, fatliquoring, dry finishing, and finished products. Among them, weak organic acids such as polyol acid and polycarboxylic acid are used in softening pickling to carry out pickling and gentle softening at the same time. The invention is a processing technology of white fur leather. The finished product finally has a plump and soft hand feel, white fur and leather board color, short and fine fleece on the board surface, and is resistant to washing and yellowing. It is especially suitable for making high-grade natural and light-colored fur leather products. . This technology does not use chrome tanning agent, can avoid the pollution of three wastes containing chromium, and eliminate the harm of hexavalent chromium; it can effectively reduce COD in wastewater during the tanning process, and at the same time control volatile organic compounds in fur leather.

Description

Technical field [0001] The present invention relates to the field of talle processes, and in particular, a chromium-free multi-metal tanning agent prepared a high-grade sheep garment toll process. Background technique [0002] Chrome Tan has always occupied absolute dominance in the field of sheep skin clothing, but with the increase in the national emission standards in the national emission standards, the cost of govern chrome wastewater is increased, which seriously limits the development of the Tale industry. . So, finding an alternative chrome tanning method has become a research focus in recent years. At present, there is currently the main research direction of the main research direction with aldehyde savan, aluminum tanning, vegetable tanning, modified organic tanning, but the above method Have different degrees of defects. The skin of the aldehyde tannama will appear flunge, retreat, etc., and will slowly release free formaldehyde harm to the human body. The aluminum ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/28C14C1/08C14C9/02
CPCC14C1/08C14C3/28C14C9/02
Inventor 胡建中马建标沈跃庭谈正南
Owner 浙江中辉裘革科技有限公司
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