Method for dyeing leather

A dyeing method and technology for leather, applied in the direction of dyeing, textile and papermaking, etc., can solve the problems of dyeing waste liquid discharge, dyeing sewage, and long time consumption.

Inactive Publication Date: 2016-07-27
HENAN PROSPER SKINS & LEATHER ENTERPRISE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still relatively large defects in the traditional leather dyeing process. The first is dyeing sewage. In leather dyeing, especially in fur dyeing, a large amount of water will be used, and the water consumption is 12 to 20 times the weight of the hide. , a large amount of dyeing waste is discharged, causing great pressure on the environment
Secondly, the dyeing process is cumbersome and time-consuming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] First, prepare the dyeing agent for roller dyeing, take 20 parts by weight of dye 5915 (Staler dye water series), 14 parts by weight of dye yellow M (Derui Leather Technology (Qingdao) Co., Ltd.), 8 parts by weight of dye Red M (Derui Leather Technology (Qingdao) Co., Ltd.), 12 parts by weight of dye 5924 (Staler dye water series), penetration aid 100 parts by weight of 4235 and 30 parts by weight of methoxyacetone, and 900 parts by weight part of water, mix the above ingredients, and then stir evenly to obtain the dyeing agent for roller dyeing.

[0069] Then the dyeing agent obtained by the above steps is uniformly coated on the 20L feeding roller to obtain a coloring roller, and the gap between the coloring roller and the second roller is adjusted to be 12mm, and the coloring roller rotation speed is 7.5rpm / min and the speed of the conveyor belt 7.5 m / min, and then spread the sheep shearling with an average thickness of 20mm on the conveyor belt, and the hide is sent...

Embodiment 2

[0073] First, prepare the dyeing agent for roller dyeing, take 5 parts by weight of dye LD-5915 (Staler dye water series), 16 parts by weight of dye yellow M (Derui Leather Technology (Qingdao) Co., Ltd.), 8 parts by weight Dye LD-5959 (Staler dye water series), penetration aid 70 parts by weight of 4235 and 50 parts by weight of isopropyl alcohol, and 900 parts by weight of water, mix the above ingredients, and then stir to obtain roller dyeing Use dye.

[0074] Then the dyeing agent that above-mentioned step obtains is evenly coated on the feeding roller of 16L, obtains the coloring roller, then adjusts the gap between the coloring roller and the second roller to be 16mm, the coloring roller rotation speed is 8.5rpm / min and the conveyer belt speed 8.5 m / min, and then spread the sheep shearling with an average thickness of 30mm on the conveyor belt, and the hide is sent to between the coloring roller and the second roller through the conveyor belt. After coloring, the dyed s...

Embodiment 3

[0078] First, prepare the dyeing agent for roller dyeing, take 8 parts by weight of dye LD-5928 (Staler dye water series), 6 parts by weight of dye red M (Derui Leather Technology (Qingdao) Co., Ltd.), 5 parts by weight The dye LD-5959 (Staler dye water series), 20 parts by weight of the dye LD-5915 (Stahl dye water series), 100 parts by weight of 4235 and 20 parts by weight of isopropanol as a penetration aid, and 900 parts by weight water in parts by weight, mix the above-mentioned ingredients, and then stir evenly to obtain the dyeing agent for roller dyeing.

[0079] Then the dyeing agent obtained by the above steps is evenly coated on the 24L feeding roller to obtain a coloring roller, and the gap between the coloring roller and the second roller is adjusted to be 10mm, and the coloring roller rotation speed is 8.0rpm / min and the speed of the conveyor belt 8.0 m / min, and then spread the sheep shearling with an average thickness of 25mm on the conveyor belt, and the hide i...

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PUM

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Abstract

The invention provides a method for dyeing leather. The method comprises the following steps: in the effects of a coloring agent, leather is dyed by rollers, and the dyed leather is obtained. Roller dying technology replaces the traditional rotary drum dyeing technology, leather needs not to be completely immersed in dyeing bath liquid for dyeing, so that dyeing bath liquid is not needed, dying paste materials can be completely absorbed and combined by the leather, and no waste liquid is discharged; at the same time dyeing period is substantially reduced, dyeing time is short, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of leather treatment and processing, in particular to a leather dyeing method. Background technique [0002] Leather processing has a history of thousands of years. After a long period of development, tanning has developed from a simple manual operation to an important industrial technology field. Since the center of gravity of the leather industry began to shift from Europe to Asia in the early 1980s, my country's leather industry has developed by leaps and bounds, and it has become one of the most important leather and leather product production centers in the world. my country's cowhide, pigskin, sheepskin and other resources rank first in the world, and its annual output of light leather ranks first in the world, accounting for more than 20% of the world's total. The center will be further transferred to our country, and the leather industry will become a characteristic industry of our country and will p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/32D06P3/30D06P5/00D06P1/651
Inventor 任尚华杨金
Owner HENAN PROSPER SKINS & LEATHER ENTERPRISE CO LTD
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