Chromium-free tanning production process of low-formaldehyde beach woolskin

A production process and low-formaldehyde technology, applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, pre-tanning chemical treatment, etc., can solve the problem of difficulty in maintaining naturalness, It will bring problems such as pollution and excessive formaldehyde content, and achieve the effect of plump hand feeling, reduced treatment cost, and pure white coat color

Active Publication Date: 2012-10-03
宁夏西部皮草有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Production by conventional chrome tanning process is difficult to maintain its naturalness and will cause pollution; tanning by chr

Method used

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  • Chromium-free tanning production process of low-formaldehyde beach woolskin
  • Chromium-free tanning production process of low-formaldehyde beach woolskin
  • Chromium-free tanning production process of low-formaldehyde beach woolskin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The chrome-free tanning process of chrome-free tanning agent TWT tanning low-formaldehyde beach sheepskin in the present embodiment, comprises the following steps successively:

[0034] Soaking in water: Soak the beach sheepskin in the soaking liquid at a temperature of 30-35°C for 12-24 hours. The composition of the soaking liquid is: fungicide Diamoll WEF Powder 0.5-1.5g / L, table salt 10-25g / L , degreasing agent TPL 0.5-2.5g / L, soaking enzyme Feliderm SE 3Powder 0.1-1.5g / L, and the rest is water; the amount of soaking liquid should be 20-30 in the mass ratio of water and fur in the soaking liquid.

[0035] to the meat.

[0036] Degreasing: In the degreasing solution, paddle for 30-120 minutes at a temperature of 35-40°C. , the composition of the degreasing liquid is: soda ash 0.5-1.5g / L, compound enzyme DESOBATE LG 0.1-1.5g / L, penetrant JFC0.5-1.5g / L, degreasing agent PX 2-5g / L, and the rest are Water; the amount of degreasing liquid is preferably 20-40 with the mas...

Embodiment 2

[0053] The chrome-free tanning process of chrome-free tanning agent TWT tanning low-formaldehyde beach sheepskin in the present embodiment, comprises the following steps successively:

[0054] Tanning: after the above steps, put the Tan sheepskin in the groove for tanning, use 20L water for each Tan sheepskin, add chelating dispersant DT-A101 (Demei Chemical) 0.4g / L, chrome-free tanning agent TWT (Demei Chemical) 8g / L, whitening agent W-HC (Fanbo Technology) 0.4g / L, degreasing agent DESOAGEN N309 (Desaier Chemical) 0.6g / L, the temperature is 36°C, and the pH is adjusted to 4.7 After padding for 150 minutes, let it stand overnight. The next day, use a magenta indicator to check the color of the incision. If it is purple and uniform in color, it proves that the penetration is complete.

[0055] Alkali extraction after tanning: add baking soda to the tanning solution after standing to extract alkali. The concentration of baking soda is 1.9g / L, take out 10 times of the tanning so...

Embodiment 3

[0063] The chrome-free tanning process of chrome-free tanning agent TWT tanning low-formaldehyde beach sheepskin in the present embodiment, comprises the following steps successively:

[0064] Tanning: put the Tan sheepskin in the groove after the above steps for tanning, use 40L water for each Tan sheepskin, add 1.2g / L of chelating dispersant Lushuntong RED (BASF), and chrome-free tanning agent TWT (Demei Chemical) 14g / L, whitening agent WZS (Fanbo Technology) 0.8g / L, Weiss fur degreasing agent JA-50 (Fanbo Technology) 1.2g / L, the temperature is 42°C, and the pH is adjusted to 5.0 After padding for 120 minutes, let it stand overnight. The next day, use magenta indicator to check the color of the incision. If it is purple and uniform in color, it proves that the penetration is complete.

[0065] Alkali extraction after tanning: add baking soda to the tanning solution after standing to extract alkali. The concentration of baking soda is 1.4g / L, take out 10 times of the tanning...

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Abstract

The invention relates to a chromium-free tanning production process of a low-formaldehyde beach woolskin. The chromium-free tanning production process comprises the following process procedures of: water soakage, fleshing, degreasing, softening, WT tanning, alkali extraction after the tanning, wet grinding, water scrubbing, drying in the air, conditioning, retanning, alkali extraction after the retanning, fat addition, drying in the air, skin shoveling, dry grinding and dust brushing to obtain a finished product. The chromium-free tanning production process is characterized in that the tanning and the retanning are respectively completed in a tanning solution and a retanning solution which do not contain chromium. By using the chromium-free tanning production process, the processing of the beach woolskin is carried out by adopting a chromium-free tanning agent; not only can the waste chromium zero emission of a tanning working procedure and a retanning working procedure be realized and the sewage treatment cost of an enterprise be decreased, but also the produced beach woolskin is natural in color and is curly and attractive; a leather body is full and soft in hand feel and is lower than 75 mg/kg; a shrinkage temperature is higher than above 80 DEG C; and physical properties and mechanical prosperities can reach those of a fur acquired by an ordinary chromium tanning method.

Description

technical field [0001] The invention relates to a fur processing technology, in particular to a chrome-free tanning production technology of low-formaldehyde beach wool skin. Background technique [0002] At present, the tanning method of light leather in the world is mainly chrome tanning. The leather obtained through chrome tanning has a high shrinkage temperature, soft and plump finished leather, good stability and washable. Modern leather production technology is mainly driven by chrome tanning. After more than 100 years of development, it still occupies a dominant position. The fur industry is a part of the leather industry. The main tanning method of industrial production is also the chrome tanning method. However, it is different from other leather industries, that is, the water consumption in production is large, and the water consumption in each process is 10 times that of the leather industry. To more than 20 times, wherein the amount of chemical raw materials is ...

Claims

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Application Information

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IPC IPC(8): C14C1/04C14C1/08C14C3/28C14C3/30
Inventor 王自荣王学川强涛涛马旭
Owner 宁夏西部皮草有限公司
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