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Technology for preparing high-grade wool garment double face leather with chromium-free polymetallic tanning agents

A multi-metal and tanning agent technology, applied in the direction of leather impregnation, chemical treatment before tanning, small hide/big hide/leather/fur treatment, etc. Aluminum tanning is not resistant to washing and other problems, to achieve the effect of low COD content, soft and plump leather board, and easy to handle

Active Publication Date: 2019-03-08
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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  • Technology for preparing high-grade wool garment double face leather with chromium-free polymetallic tanning agents
  • Technology for preparing high-grade wool garment double face leather with chromium-free polymetallic tanning agents
  • Technology for preparing high-grade wool garment double face leather with chromium-free polymetallic tanning agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A kind of chrome-free polymetallic tanning agent prepares high-grade sheep garment fur leather process, comprises the following steps:

[0068] Step 1. Rehumidify,

[0069] Step 2, spin dry,

[0070] Step three, shearing,

[0071] Step four, the main immersion,

[0072] Step five, remove the meat,

[0073] Step six, degreasing,

[0074] Steps 1 to 6 are conventional processes.

[0075] Step 7, softening pickling, the proportioning of softening pickling solution is:

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

[0077] Acid softening enzyme DVP (Derui Leather Technology) or acid softening enzyme WB (Derui Leather Technology) 4 g / l,

[0078] industrial salt 20 g / l,

[0079] The rest is water.

[0080] Proceed as follows:

[0081] First, add fur to the softening pickling solution, the amount of softening pickling solution is based on the mass ratio of water to fur in the softening pickling solution is 30, the temperature is adjusted to 40°C, and the treatm...

Embodiment 2

[0119] A kind of chrome-free polymetallic tanning agent prepares high-grade sheep garment fur leather process, comprises the following steps:

[0120] Step 1. Rehumidify,

[0121] Step 2, spin dry,

[0122] Step three, shearing,

[0123] Step four, the main immersion,

[0124] Step five, remove the meat,

[0125] Step six, degreasing,

[0126] Steps 1 to 6 are conventional processes.

[0127] Step 7, softening pickling, the proportioning of softening pickling solution is:

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

[0129] Acid softening enzyme DVP (Derui Leather Technology) or acid softening enzyme WB (Derui Leather Technology) 1 g / l,

[0130] industrial salt 23 g / l,

[0131] The rest is water.

[0132] Proceed as follows:

[0133] First, add fur to the softening pickling solution, the amount of softening pickling solution is based on the mass ratio of water to fur in the softening pickling solution is 40, the temperature is adjusted to 30°C, and the treatmen...

Embodiment 3

[0171] A kind of chrome-free polymetallic tanning agent prepares high-grade sheep garment fur leather process, comprises the following steps:

[0172] Step 1. Rehumidify,

[0173] Step 2, spin dry,

[0174] Step three, shearing,

[0175] Step four, the main immersion,

[0176] Step five, remove the meat,

[0177] Step six, degreasing,

[0178] Steps 1 to 6 are conventional processes.

[0179] Step 7, softening pickling, the proportioning of softening pickling solution is:

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

[0181] Acid softening enzyme DVP (Derui Leather Technology) or acid softening enzyme WB (Derui Leather Technology) 2 g / l,

[0182] industrial salt 30 g / l,

[0183] The rest is water.

[0184] Proceed as follows:

[0185] First, add fur to the softening pickling solution, the amount of softening pickling solution is based on the mass ratio of water to fur in the softening pickling solution is 20, the temperature is adjusted to 35°C, and the treatmen...

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Abstract

The invention relates to the technical field of double face leather processing, in particular to a technology for preparing high-grade wool garment double face leather with chromium-free polymetallictanning agents. The technology sequentially comprises the steps of rewetting, spin-drying, shearing, main soaking, meat removal, degreasing, softening and pickling, tanning, wet grinding, retanning, neutralization, fatliquoring, dry finishing and finished products, wherein weak organic acids such as polyhydric alcohol acid, polycarboxylic acid are used in the softening and pickling for pickling and mild softening at the same time. The technology for preparing the high-grade wool garment double face leather with the chromium-free polymetallic tanning agents is a processing technology of white double face leather, and finished products obtained finally have plump and soft hand feeling, white fur color and leather plate color, short and fine surface velvet, water washing resistance and yellowing resistance, and the technology is especially suitable for making high-grade natural color and light color double face leather products. The technology does not use chrome tanning agents, so that the pollution of three wastes containing chrome can be avoided, and the harm of hexavalent chrome is eliminated; and COD in wastewater can be effectively reduced in the tanning process, and volatile organic compounds in double face leather can be controlled meanwhile.

Description

technical field [0001] 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. Background technique [0002] Chrome tanning has always occupied an absolute dominant position in the field of wool leather tanning for sheepskin clothing, but with the improvement and restrictions on the discharge standards of the fur leather industry, the cost of treating chromium-containing wastewater has doubled, severely restricting the development of the fur leather industry . Therefore, finding a tanning method that can replace chrome tanning has become the focus of research in recent years. At present, the main research directions of chrome-free tanning of fur leather include methods such as aldehyde tanning, aluminum tanning, vegetable tanning, and modified organic tanning. There are varying degrees of defects. The hides obtained by the aldehyd...

Claims

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Application Information

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Patent Type & Authority Applications(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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