Ashless and alkali sulfide free depilation liming treatment method for preparing leather from goatskin

A treatment method and goat skin technology, applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, chemical treatment before tanning, etc., to reduce the consumption of machinery and equipment Pollution, the effect of reducing loose surface rate

Inactive Publication Date: 2008-09-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large amounts of lime also increase the difficu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Production process of goat leather upper leather

[0033] (1) Immersion in water

[0034] Take 100kg of raw hides and put them into a drum, add 200kg of water at a temperature of 25°C to the drum, add 0.2kg, soda ash 0.4kg, MERPIN 8000 fungicide 0.1kg, Baim AN-C degreaser 0.3kg, turn for 15 minutes , stop for 15 minutes, a total of 4 times, then add 0.4 kg of soda ash, turn for 15 minutes, stop for 15 minutes, a total of 4 times, then turn for 5 minutes every 2 hours, control the pH value to 9.2, a total of 20 hours, check the skin and bones Soft, the incisions are all through the heart, and the water is controlled.

[0035] (2) Preprocessing

[0036] Add 100 kilograms of water at a temperature of 30°C to the above-mentioned rotating drum and add 0.5 kilograms of pretreatment agent with a mass ratio of urea: sodium hydroxide to 1.0:1.5:1.5, turn it for 20 minutes, stop for 20 minutes, a total of 4 times, Then turn it for 3 minutes every 2 hours, for a t...

Embodiment 2

[0045] Example 2: Goat Leather Glove Leather Technology

[0046] (1) Immersion in water

[0047] Take 100kg of raw hides, put them into a drum, add 300kg of water at a temperature of 30°C to the drum, add 0.3kg, 0.5kg of soda ash, 0.15kg of MERPIN 8000 fungicide, 0.4kg of Baim AN-C degreaser, and rotate for 15 minutes , stop for 15 minutes, a total of 4 times, then add 0.5 kg of soda ash, turn for 15 minutes, stop for 15 minutes, a total of 4 times, then turn for 5 minutes every 2 hours, control the pH value to 9.5, a total of 20 hours, check the skin and bones Soft, the incisions are all through the heart, and the water is controlled.

[0048] (2) Preprocessing

[0049] Add 150 kilograms of water at a temperature of 30°C to the above-mentioned rotating drum and add 0.8 kilograms of pretreatment agent with a mass ratio of urea: sodium hydroxide to 2.0:1.0:1.0, turn it for 30 minutes, stop for 30 minutes, a total of 4 times, Then turn it for 3 minutes every 2 hours, for a to...

Embodiment 3

[0058] Example 3: Goat Leather Garment Leather Technology

[0059] (1) Immersion in water

[0060] Take 100kg of raw hides, put them into a drum, add 250kg of water at a temperature of 28°C to the drum, add 0.25kg, 0.45kg of soda ash, 0.13kg of MERPIN 8000 fungicide, 0.35kg of Baim AN-C degreaser, and rotate for 15 minutes , stop for 15 minutes, a total of 4 times, then add 0.45 kg of soda ash, turn for 15 minutes, stop for 15 minutes, a total of 4 times, then turn for 5 minutes every 2 hours, control the pH value to 9.4, a total of 22 hours, check the skin and bones Soft, the incisions are all through the heart, and the water is controlled.

[0061] (2) Preprocessing

[0062] In the above-mentioned drum, add 130 kilograms of water at a temperature of 25°C and add 0.7 kilograms of pretreatment agent with a mass ratio of urea: sodium hydroxide to 1.5:1.0:1.5, turn it for 25 minutes, stop for 25 minutes, a total of 4 times, Then turn it for 3 minutes every 2 hours, for a tota...

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PUM

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Abstract

The invention relates to a goatskin currying processing method of alkali depilation liming without dust and vulcanization. The method is characterized in that sodium sulfide, sodium bisulfide and lime are not used; lime precipitate and residua do not appear to ensure the drained waste water to be more easily processed. The pollution to the environment in the currying process is greatly reduced. The washing dust skin which is a highest water cost working procedure is eliminated, and the saved water is about 20 percent to 40 percent of the total draining quantity of waster water. The damage to finished leather quality caused by mechanical effect is reduced; the loose surface rate caused by mechanical effect is greatly reduced; the production period is also shortened; various materials are saved and the production combined cost is reduced.

Description

technical field [0001] The invention relates to an ash-free and sulfide-free alkali dehairing and liming treatment method for goat leather tanning, and belongs to the field of tanning preparation section. The method is suitable for dehairing and liming treatment before tanning of goat leather garment leather, glove leather and shoe upper leather that are currently on the market. technical background [0002] For more than 20 years, my country's tanning industry has played a role that cannot be underestimated in earning foreign exchange through exports, enriching the urban commodity market, and developing the economy of rural and pastoral areas. However, the development of the leather industry is constrained by pollution problems. At present, the pressure of environmental protection has become a trend to shut down or carry out regional transfer of the leather industry. [0003] At present, more than 98% of tanneries use sulfide soda lime traditional tanning depilation and l...

Claims

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Application Information

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IPC IPC(8): C14C1/06C14C1/08
Inventor 单志华李书卿王亚娟卓学张松林
Owner SICHUAN UNIV
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