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Environment-friendly dyeing technology for cattle hide split leather

A kind of leather and environmental protection technology, applied in the field of environmental protection dyeing technology, can solve the problems of restricting the scale production and application of cow split leather, the human and environmental hazards of chromium-containing waste liquid, and the high content of chromium trioxide, so as to achieve good environmental protection benefits, color and luster Plump and bright, reduce chromium pollution effect

Active Publication Date: 2017-04-05
福建省永建皮革科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cow split leather is mainly close to the reticular layer of leather, and is composed of coarse collagen fiber bundles woven in three-dimensional space. The collagen fiber bundles are loosely woven, which limits the scale production and application of cow split leather.
At present, most cow split leather manufacturers mainly improve the strength of leather by adding chromium blending agent in the compounding process of leather production. The direct discharge of chromium waste liquid will cause serious harm to human beings and the environment
In addition, the strength of the leather produced through the chrome compounding process is still not high, and the leather is hard, the hand feeling is poor, and the fullness of the leather is not good. Therefore, it is of great significance to apply the new technology to the production of cow split leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An environmentally friendly dyeing process for cow two-layer leather, including the following steps:

[0028] (1) Material selection: select leather, weigh it, and place the leather in the drum;

[0029] (2) Degreasing and returning water: Add 200% of the leather weight of 35°C water and 0.5% of the leather weight of E100 degreaser to the drum in turn, and drain after rotating for 40 minutes;

[0030] (3) Softening: Add 100% leather weight of 35℃ water, 0.5% leather weight of K21 softening enzyme with 0.5% weight concentration and 1% leather weight of 1% ammonia-free deashing into the drum To adjust the pH to 6.5, rotate for 30 minutes;

[0031] (4) Tanning: Add 1% leather weight MD-1 melamine retanning agent, 1% leather weight R7 dipolycyanamide, 2% leather weight phenolic synthetic tanning agent JR-309 and 2% into the drum Aromatic synthetic tanning agent 960 synthetic tanning agent of leather weight, rotating for 60 minutes;

[0032] (5) Dyeing: add 1% leather weight dye to ...

Embodiment 2

[0036] An environmentally friendly dyeing process for cow two-layer leather, including the following steps:

[0037] (1) Material selection: select leather, weigh it, and place the leather in the drum;

[0038] (2) Degreasing and returning water: Add 250% of the leather weight of 30°C water and 0.6% of the leather weight of E100 degreaser to the drum in turn, and drain after rotating for 60 minutes;

[0039] (3) Softening: Add 110% of the leather weight of water at 30°C, 0.8% of the leather weight of K21 softening enzyme with 0.5% of the mass concentration and 1.5% of the leather weight of 1% ammonia-free deashing into the drum To adjust the pH to 6.5, rotate for 45 minutes;

[0040] (4) Tanning: Add 2% leather weight MD-1 melamine retanning agent, 2% leather weight R7 dipolycyanamide, 2.5% leather weight phenolic synthetic tanning agent JR-309 and 2.5% into the drum Aromatic synthetic tanning agent 960 synthetic tanning agent of leather weight, rotate for 90 minutes;

[0041] (5) Dye...

Embodiment 3

[0045] An environmentally friendly dyeing process for cow two-layer leather, including the following steps:

[0046] (1) Material selection: select leather, weigh it, and place the leather in the drum;

[0047] (2) Degreasing and returning water: Add 300% of the leather weight of 35°C water and 0.8% of the leather weight of E100 degreaser to the drum in turn, and drain after rotating for 80 minutes;

[0048] (3) Softening: add 120% of the leather weight of water at 40°C, 1.0% of the leather weight of K21 softening enzyme with 0.5% of the weight concentration, and 2.0% of the leather weight of 1% ammonia-free deashing into the drum To adjust the pH to 6.5, rotate for 60 minutes;

[0049] (4) Tanning: Add 3% leather weight MD-1 melamine retanning agent, 3% leather weight R7 dipolycyanamide, 3% leather weight phenolic synthetic tanning agent DS replacement and 3% leather to the drum Weight of aromatic synthetic tanning agent THL synthetic tanning agent, rotating for 120 minutes;

[0050]...

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PUM

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Abstract

The invention discloses an environment-friendly dyeing technology for cattle hide split leather. The cattle hide split leather is obtained through the technology steps of degreasing and water returning, softening, tanning, dyeing, fixing, after treatment and the like. Clean production is emphasized in the technology process, pollution is little, and very good environment-friendly benefits are achieved; and the cattle hide split leather obtained through production is high in strength, good in hand feeling and full and bright in color.

Description

Technical field [0001] The invention relates to the technical production field of leather, in particular to an environmentally-friendly dyeing process for cow two-layer leather. Background technique [0002] With the increase in the output of cowhide furniture leather and shoe upper leather, the utilization and development of cattle two-layer leather has become a hot spot in the leather industry. Bovine second-layer leather is mainly close to the mesh layer of leather. It is composed of three-dimensionally woven thick skin collagen fiber bundles. The loose weaving of collagen fiber bundles limits the large-scale production and application of bovine second-layer leather. At present, most of the cattle two-layer leather production enterprises mainly improve the strength of the leather by adding a chromium blending agent in the leather production process. However, the chromium trioxide content in the waste liquid after the chromium blending is too high and contains a lot of The dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C1/08C14C3/08D06P3/32D06P5/04
CPCC14C1/08C14C3/08D06P3/32D06P5/04
Inventor 蒋永芳林树生陈浩
Owner 福建省永建皮革科技股份有限公司
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