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Clean production method of chromium-free automobile cushion leather

A production method, the technology of chromium automobile, applied in the chemical treatment of small raw hide/big raw hide/leather skin/fur, small raw hide/big raw hide/leather/fur treatment, tanning treatment, etc., can solve the problem of low Ts and achieve Less use, less polluting effect

Inactive Publication Date: 2006-07-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leather obtained by these tanning methods is either firm or white and washable, but the common disadvantage is that Ts is low (≤85°C), which is very good for furniture, clothing, soft shoe uppers and industrial leather that require Ts≥90°C today. meaningless

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Semi-circular immersion

[0050] Put 100 kg of salt-wet skin into a drum, wash with 150 kg of water at a temperature of 22-28°C for 30 minutes, drain, use 150 kg of water at a temperature of 22-28°C, add 0.1 kg of salicyloyl sodium, soak in water 0.02 kg of enzyme is used for pre-soaking and main soaking, and the water discharged from the pre-soaking and main soaking process of the last batch of salt-wet hides is used for the pre-soaking of the next batch of salt-wet hides;

[0051] (2) Hair preservation and hair removal

[0052] Use 50 kg of water at a temperature of 22 to 28 °C, 1 kg of sodium sulfide, 0.2 kg of sodium hydrogen sulfide, and 1 kg of lime. 6 -C 7 0.5 kg of ammonium carboxylate mixture, pre-treated for 20 minutes, then added 0.4 kg of sodium sulfide for 30 minutes, supplemented with 50 kg of water at a temperature of 18-22 ° C, and stopped for 12 hours. The effluent passes through the hair filter to recover the cow hair;

[0053] (3) Enzyme-alkal...

Embodiment 2

[0073] (1) Semi-circular immersion

[0074] Put 100 kg of salt-wet skin into the drum, wash with 200 kg of water at a temperature of 22-28°C for 60 minutes, drain, use 200 kg of water at a temperature of 22-28°C, add 0.3 parts of salicyl ammonium, and 0.1 parts of soaking enzyme The pre-soaking of each part is carried out, and the main water is used for the pre-soaking of the next batch of salt-wet hides;

[0075] (2) hair removal

[0076] Use 100 kg of water at a temperature of 22 to 28°C, 2 kg of sodium sulfide, 0.4 kg of sodium hydrosulfide, 3 kg of lime, and 7 -C 8 1.5 kg of ammonium carboxylate mixture, pre-treated for 60 minutes, then added 0.8 kg of sodium sulfide for 60 minutes, supplemented with 100 kg of water at a temperature of 18-22 ° C, stopped and combined for 18 hours, and the effluent passed through the hair filter to recover cow hair ;

[0077] (3) Enzyme base binding expansion

[0078] Use 100 kg of water with a temperature of 22-28°C, 0.5 kg of alkalin...

Embodiment 3

[0097] (1) Immersion

[0098] Put 100 kg of salt-wet skin into the drum, wash with 175 kg of water at a temperature of 22-28°C for 60 minutes, drain, then use 175 kg of water at a temperature of 22-28°C, add 0.2 kg of salicyloyl sodium, soak in water enzyme 0.06 kg, for pre-soaking and main soaking, using the water discharged from the pre-soaking and main soaking processes of the previous batch of salt-wet hides for the pre-soaking of the next batch of salt-wet hides;

[0099] (2) Hair preservation and hair removal

[0100] Use 75 kg of water at a temperature of 22 to 28°C, 1.5 kg of sodium sulfide, 0.3 kg of sodium hydrosulfide, 2 kg of lime, and 9 -C 10 1 kg of ammonium carboxylate mixture, pre-treated for 40 minutes, then added 0.6 kg of sodium sulfide for 45 minutes, added 75 kg of water at a temperature of 18-22 ° C after hair removal, stopped and combined for 15 hours, and the effluent passed through the filter hair device for recovering ox hair;

[0101] (3) Enzyme-al...

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Abstract

The clear production method for Cr-free vehicle seat cushion comprises: hair-saving, combing acid and base for expansion; ammonia-free deliming, dipping weak acid and low slat, Cr-free bating, composite batting, and adding strong-absorption fat for dyeing to treat skin from pig, cattle or sheep. The product has shrinkage temperature up to 110Deg, shows well hand feeling and resistance to thermal and age. This invention reduces material quantity and 30-50% sewage discharge, improves absorption rate, and brings a new way for Cr-free leather.

Description

technical field [0001] The invention relates to a clean production method of chromium-free automobile seat cushion leather, which belongs to the production field of leather tanning. It is suitable for the requirements of chrome-free tanned car seat leather in the current market. The shrinkage temperature and physical and mechanical indicators of the finished leather meet the chrome-tanned leather standards issued by the Ministry of Light Industry in 1999. Background technique [0002] Hair and skin removal is a natural process in tanning. Traditional Na 2 S destroyed hair caused the worst S 2- , COD emissions. Replace Na 2 There are many reports of ethanolamine, organic mercaptan or other organic amine chemicals as special chemical reagents for hair removal (Zhang Renquan, Sun Jiliang, Zhang Jingbin. Development of Sulfur-free Hair Remover Chemical Times, 1994 (12): 21-23.) , but are difficult to use in industrial production. In 1983, SIROLIME hair preservation and hai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/00C14C3/30
Inventor 单志华罗建勋李铠石碧冯国涛陈慧
Owner SICHUAN UNIV
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