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Two-medium circulating dyeing method with high dye-uptake and color fastness

A dyeing method and dye uptake technology, applied in the field of fabric dyeing, can solve the problems of low color depth, difficult recycling and high energy consumption, and achieve the effect of high color depth and full utilization.

Active Publication Date: 2020-11-13
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The medium of supercritical carbon dioxide dyeing technology is non-polar carbon dioxide, which has poor compatibility with fibers with high molecular polarity (such as cotton, silk, wool) and reactive dyes. After dyeing, there are defects such as low color depth and large color difference.
Although solvent dyeing overcomes the defects of low color depth and large color difference in supercritical carbon dioxide anhydrous dyeing, it uses a large amount of solvent, is difficult to recycle, requires a large amount of salt, consumes a lot of energy, and has high dyeing operation costs.

Method used

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  • Two-medium circulating dyeing method with high dye-uptake and color fastness

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A double-medium cycle dyeing method with high dye uptake and color fastness, said method comprising the steps of:

[0024] Preparation of pad dyeing solution: Add active green blue B-BGFN and potassium hydroxide to the mixed solvent, fully dissolve at 30°C, wherein: the concentration of active green blue B-BGFN is 25g / L, and the concentration of potassium hydroxide is 5g / L, the mixed solvent is a mixture of dimethyl sulfoxide and ethanol at a volume ratio of 1:1;

[0025] Pure cotton fiber pad dyeing: pre-swell the fiber in the pad dyeing solution at 30°C for 2 minutes, and then pad the pre-swelled fiber at 0.1 MPa;

[0026] Pure cotton fiber dyeing: put the padded fiber into a supercritical carbon dioxide dyeing kettle, dye the padded fiber at 90°C and 20MPa for 60 minutes, and take the fiber out of the supercritical carbon dioxide dyeing kettle after releasing the pressure;

[0027] Cleaning of pure cotton fibers: Put the dyed fibers into the cleaning tank and wash t...

Embodiment 2

[0032] A double-medium cycle dyeing method with high dye uptake and color fastness, said method comprising the steps of:

[0033] Preparation of pad dyeing solution: Add active golden BPF, urea, and potassium hydroxide to the mixed solvent, fully dissolve at 25°C, wherein: the concentration of active golden BPF is 10g / L, the concentration of urea is 5g / L, The concentration of potassium is 5g / L, and the mixed solvent is a mixture of dimethyl sulfoxide and ethanol at a volume ratio of 1:5;

[0034] Bamboo fiber pad dyeing: pre-swell the fiber in the pad dyeing solution at 25°C for 2 minutes, and then pad the pre-swelled fiber at 0.2 MPa;

[0035] Bamboo fiber dyeing: put the padded fiber into a supercritical carbon dioxide dyeing kettle, dye the padded fiber at 95°C and 24MPa for 60 minutes, and take the fiber out of the supercritical carbon dioxide dyeing kettle after releasing the pressure;

[0036] Bamboo fiber cleaning: put the dyed fiber into the cleaning tank and wash it ...

Embodiment 3

[0041] A double-medium cycle dyeing method with high dye uptake and color fastness, said method comprising the steps of:

[0042] Prepare pad dyeing solution: add urea and sodium hydroxide to the mixed solvent, fully dissolve at 40°C, then cool down to 20°C and add Lihua Shiyanhong E-BA to it to fully dissolve, of which: Lihuashiyanhong E- The concentration of BA is 5g / L, the concentration of urea is 60g / L, the concentration of sodium hydroxide is 5g / L, and the mixed solvent is dimethyl sulfoxide, ethylene glycol and ethanol in a volume ratio of 2:1:1;

[0043] Pad dyeing of flax fiber: pre-swell the fiber in the pad dyeing solution at 20°C for 3 minutes, and then pad the pre-swelled fiber at 0.5MPa;

[0044] Flax fiber dyeing: put the padded fiber into a supercritical carbon dioxide dyeing kettle, dye the padded fiber at 40°C and 20MPa for 120 minutes, and take the fiber out of the supercritical carbon dioxide dyeing kettle after releasing the pressure;

[0045] Linen fiber cl...

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Abstract

The invention relates to a two-medium circulating dyeing method with high dye-uptake and color fastness, and belongs to the field of fabric dyeing. The method comprises the following steps of pre-swelling fibers in a pad dyeing solution, and padding the pre-swollen fibers; putting the padded fibers into a supercritical carbon dioxide dyeing kettle, and dyeing the padded fibers; placing the dyed fibers in a cleaning tank to be cleaned in a solvent of a pad dyeing solution; and putting the cleaned fibers into a supercritical carbon dioxide drying kettle, and drying the cleaned fibers. Accordingto the method disclosed by the invention, the problems of dye hydrolysis, high solvent consumption, high circulation difficulty and the like are thoroughly avoided while high color depth and small chromatic aberration of the dyed fibers are ensured.

Description

technical field [0001] The invention relates to a dual-medium circulation dyeing method with high dye uptake and color fastness, belonging to the field of fabric dyeing. Background technique [0002] The traditional dyeing method of fibers uses water as the medium, and the dyeing of fibers is completed by adding a large amount of dyes, salts and auxiliaries during the dyeing process. This method not only causes the printing and dyeing industry to compete with humans and animals for water, but also the inactivated dyes, salts and auxiliaries contained in the dyeing wastewater will cause serious pollution to the environment and restrict the sustainable development of the textile printing and dyeing industry. [0003] Non-aqueous dyeing is considered to be a new dyeing and finishing technology that can greatly reduce the discharge of wastewater in the printing and dyeing industry. There are two kinds of non-aqueous medium dyeing techniques commonly used now: one is the supercr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/94D06P1/92
CPCD06P1/94D06P1/928D06P1/924
Inventor 赵虹娟谭莉川王明悦丁雪婷
Owner DALIAN POLYTECHNIC UNIVERSITY
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