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Chromium retanning method for fine miscellaneous hides

A chrome retanning and fine-tuning technology, applied in the field of leather tanning, can solve the problems of huge water consumption, large energy consumption, long processing time, etc., and achieve the effects of saving chemical materials, reducing the process of alkali extraction, and reducing processing time.

Inactive Publication Date: 2016-06-29
TONGXIANG NEW ERA FUR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional chrome retanning process, the groove is used as a tool, the amount of chemical products such as chromium powder, industrial salt, and wetting agent used is large, and the water consumption is also huge, and the process is relatively complicated, and the energy consumption is large.
[0003] After the existing fine miscellaneous skin is paddled for 8-12 hours after adding the dry skin, it is necessary to adjust the pH value to ensure that the pH value is around 4, then raise the temperature to 38°C, continue paddling for 6-8 hours, and finally peel, After drying, it is necessary to change the water and wash the wool; the process is relatively complicated, consumes a lot of water, and the processing time is extremely long and the efficiency is extremely low

Method used

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  • Chromium retanning method for fine miscellaneous hides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] In the chrome retanning method described in this embodiment, the retanning equipment used is a drum; first add water, chrome powder, industrial salt, wetting agent, and chrome retanning auxiliaries in the drum, and the temperature is controlled at 35 ℃, then stir chromium powder, industrial salt, and wetting agent in water evenly, then add dry skin, continue stirring for 2 hours, then raise the temperature to 43°C, and stir intermittently for 5 minutes per hour for 8 hours, and the skin can be peeled , dry; where: 1 kg of dry hide uses 3 kg of water, 1 kg of dry hide uses 0.09 kg of chromium powder, 1 kg of dry hide uses 0.09 kg of industrial salt, 1 kg of dry hide The amount of wetting agent used was 3 ml and the amount of chrome retanning aid used for 1 kg of dry hide was 40 ml.

Embodiment 2

[0012] In the chrome retanning method described in this embodiment, the retanning equipment used is a drum; first add water, chrome powder, industrial salt, wetting agent, and chrome retanning auxiliaries in the drum, and the temperature is controlled at 38 ℃, then stir chromium powder, industrial salt, and wetting agent in water evenly, then add dry skin, continue stirring for 3 hours, then raise the temperature to 46°C, and stir intermittently for 12 hours every hour for 10 minutes, and the skin can be peeled , dry; wherein: 1 kg of dry hide uses 7 kg of water, 1 kg of dry hide uses 0.21 kg of chromium powder, 1 kg of dry hide uses 0.21 kg of industrial salt, 1 kg of dry hide The amount of wetting agent used was 7 ml and the amount of chrome retanning aid used for 1 kg of dry hide was 50 ml.

Embodiment 3

[0014] In the chrome retanning method described in this embodiment, the retanning equipment used is a drum; first add water, chrome powder, industrial salt, wetting agent, and chrome retanning auxiliaries in the drum, and the temperature is controlled at 36 ℃, then stir chromium powder, industrial salt, and wetting agent in water evenly, then add dry skin, continue stirring for 2.5 hours, then raise the temperature to 45°C, and stir intermittently for 10 hours every hour for 8 minutes, and the skin can be peeled , dry; wherein: 1 kg of dry hide uses 5 kg of water, 1 kg of dry hide uses 0.15 kg of chromium powder, 1 kg of dry hide uses 0.16 kg of industrial salt, 1 kg of dry hide The amount of wetting agent used was 5 ml and the amount of chrome retanning aid used for 1 kg of dry hide was 45 ml.

[0015] Consumption comparison table of two technologies

[0016]

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PUM

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Abstract

The invention relates to the field of leather tanning, in particular to a chrome retanning method for fine and miscellaneous leather. The retanning equipment used is a drum; water, chrome powder, industrial salt, wetting agent, chrome retanning auxiliary agent, the temperature is controlled at 35-38°C, then stir the chromium powder, industrial salt, and wetting agent in water evenly, then add the dry skin, keep stirring for 2-3 hours, then raise the temperature to 43-46°C, and then 5 Stir intermittently for 10 minutes for 8-12 hours, then the skins can be peeled and dried; the fine chrome retanning method adopts drums to carry out the chrome retanning of fine skins, reducing the need for adjusting the pH value, washing Wool and other processes save a lot of water consumption, reduce energy consumption, save chemical materials, reduce processing time, and shorten the processing cycle.

Description

technical field [0001] The invention relates to the field of leather tanning, in particular to a chrome retanning method for fine leather. Background technique [0002] The overall technical level of the fur industry is low, and most of the miscellaneous skins (more than 95%) need to go through chrome retanning, so the output value of the chrome retanning process is large. However, in the traditional chrome retanning process, the groove is used as a tool, the amount of chemical products such as chromium powder, industrial salt, and wetting agent used is large, and the water consumption is also huge, and the process is relatively complicated, and the energy consumption is large. . [0003] After the existing fine miscellaneous skin is paddled for 8-12 hours after adding the dry skin, it is necessary to adjust the pH value to ensure that the pH value is around 4, then raise the temperature to 38°C, continue paddling for 6-8 hours, and finally peel, After drying, it is necess...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/02
Inventor 徐建龙郑超斌徐志敏张江山
Owner TONGXIANG NEW ERA FUR