Dyeing method of pig leather

A dyeing method and technology for leather, applied in the direction of dyeing method, textile and papermaking, dry cleaning fiber products, etc., can solve the problem of not being able to greatly improve the dry/wet rubbing fastness of leather, the dyeing rate, and the limited increase in coloring rate at the same time. problems, to achieve the effect of increasing dyeing rate, improving dry/wet rubbing fastness, and adding single operation method

Inactive Publication Date: 2016-05-04
FOSHAN JUCHENG BIOCHEM TECH RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Traditional leather printing and dyeing methods have limited improvement in dyeing rate and coloring rate, and often cannot greatly improve the dry / wet rubbing fastness of leather at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The invention provides a pig leather dyeing method, the method comprising: sequentially performing the first water washing treatment, neutralization treatment, second water washing treatment, dyeing treatment, fatliquoring treatment, color fixing treatment, auxiliary treatment, and the second washing treatment on the pig leather. Three washing treatment, drying treatment and shovel softening treatment; wherein, the preparation method of the auxiliary agent used in the auxiliary treatment includes: a. according to the mass ratio (1-5): (5-100): (1- 10): 1 Mix basic aluminum chloride and water, add methanol and butanediol, perform the first heating and reflux, and then dry to obtain a yellow powder; b. According to the solid-liquid mass ratio 1: (0.5-5) with methanol Dissolve the yellow powder to obtain a methanol solution of the yellow powder; c. mix cobalt oxychloride and butanediol according to the mass ratio 1: (2-20): (0.1-5): (1-10): (1-10) , concentrated hydrochlor...

Embodiment 1

[0045] According to the mass ratio of 1:5::1:1, mix basic aluminum chloride and water, add methanol and 1,4 butanediol, heat at 50 degrees Celsius for 1 hour, and then dry to obtain a yellow powder. According to the solid-liquid mass ratio Dissolve the yellow powder with methanol at 1:0.5; mix cobalt oxychloride, 1,4 butanediol, concentrated hydrochloric acid, acetone and leucine according to the mass ratio of 1:2:0.1:1:1, and then follow the basic chlorination The mass ratio of aluminum to cobalt oxychloride is 2:1. Add the above mixture into the methanol solution of the yellow powder, heat and reflux at 50 degrees Celsius for 1 hour, and the mass ratio of cobalt oxychloride to oxalic acid is 1:0.5 Add oxalic acid and heat to reflux at 55 degrees Celsius for 1 hour, heat and concentrate at 50 degrees Celsius for 2 hours to remove part of the solvent to obtain yellow viscous liquid dyeing auxiliary Z1.

[0046] The dyeing process in the temperature-controlled tanning machine i...

Embodiment 2

[0059] According to the mass ratio of 5:100:10:1, mix basic aluminum chloride and water, add methanol and 2,3 butanediol, heat at 150 degrees Celsius for 5 hours and then dry to obtain yellow powder. According to the solid-liquid mass ratio of 1 : 5 Dissolve the yellow powder with methanol; mix cobalt oxychloride, 2,3 butanediol, concentrated hydrochloric acid, acetone and tryptophan according to the mass ratio of 1:20:5:10:10, and mix according to the basic aluminum chloride The mass ratio of cobalt oxychloride to cobalt oxychloride is 6:1. Add the above mixture into the methanol solution of the yellow powder, heat and reflux at 110 degrees Celsius for 5 hours, and add according to the mass ratio of cobalt oxychloride and oxalic acid to 1:5 Oxalic acid was heated under reflux at 110°C for 3 hours, heated and concentrated at 150°C for 4 hours to remove part of the solvent to obtain yellow viscous liquid dyeing auxiliary Z2.

[0060] The dyeing process in the temperature-contro...

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Abstract

The invention relates to a dyeing method of pig leather. The method comprises the following steps of sequentially carrying out water washing treatment, neutralizing treatment, water washing treatment, dyeing treatment, fat liquoring treatment, color fixation treatment, auxiliary agent treatment, water washing treatment, drying treatment and softening treatment on the pig leather, wherein a dyeing auxiliary agent is prepared from alkaline type aluminum chloride, water, methanol, butanediol, cobalt oxychloride, butanediol, concentrated hydrochloric acid, acetone, an amino acid and oxalic acid. The pig leather dyeing auxiliary agent prepared by the invention has very good cold and heat stability and mechanical stability, can be used for effectively improving the dyeing rate and coloring rate of dyestuff, and also can be used for improving dry resistance/wet rubbing fastness of the leather.

Description

technical field [0001] The invention specifically relates to the field of animal leather processing, in particular to a method for dyeing pig leather. Background technique [0002] Dyeing is a very important process in leather production. Through dyeing, leather can obtain bright and rich colors and increase the variety of leather patterns to adapt to the current popular style, keep up with the trend of the times, make it a popular fashion element, and increase their added value to the greatest extent. The surface color and fastness of leather are as important as the mechanical strength, hand feeling, grain fineness and other characteristics of leather. Generally, buyers often choose and evaluate the quality of leather through appearance phenomena. Therefore, modern leather dyeing is particularly important. . Dyeing is the key to obtaining a light finish in suede, upholstery and front garment leathers, while for suede the dyed color is the final shade of the finished leath...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/651D06P1/673D06P1/647D06P3/32D06P5/04D06L1/16
CPCD06P1/65118D06L1/16D06P1/647D06P1/65112D06P1/67316D06P1/67341D06P3/32D06P5/04
Inventor 不公告发明人
Owner FOSHAN JUCHENG BIOCHEM TECH RES & DEV CO LTD
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