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Vat dye dyeing method using supercritical CO2 fluid

A dyeing method and supercritical technology, applied in the field of dyeing technology, can solve problems such as water shortage and pollution, achieve good dyeing effect and save water resources

Active Publication Date: 2014-04-16
CHENGDU TEXTILE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to: provide a kind of supercritical CO 2 Fluid vat dyeing method aimed at solving the problem of water shortage and pollution caused by the existing water dyeing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh 1g of vat dye blue and 5ml-10ml of co-solvent and mix them into the dye kettle; weigh 100g of polyester fiber fabric and wind it on the dyeing shaft flatly, and put it into the dyeing kettle; input liquid carbon dioxide through the booster pump to make the system The pressure is increased to 10 MPa -30 MPa, and the temperature of the heating system reaches 40°C-130°C; 2 The dyeing fluid circulates between the inner and outer layers of the crimped polyester fiber fabric, which is conducive to the uniform adsorption, penetration, and fixation of the dyestuff inside the fiber; through a small feeding pump, according to the material-to-liquid ratio of the fabric to the expansion agent: 1:5-1: 10. Inject the expansion agent into the dyeing system at a flow rate of 1ml-10ml / min; maintain the pressure and temperature, and the cycle dyeing time reaches 40min-120min. After the cycle dyeing time is completed, reduce the system pressure to 3 MPa-8MPa, reduce the system tempe...

Embodiment 2

[0050] Weigh 1g of vat dye red and 5ml-10ml of co-solvent and mix them into the dye kettle; weigh 100g of cotton fiber fabric pretreated with natural fiber expansion agent, wind it flat on the dyeing shaft and put it into the dye kettle; The booster pump inputs liquid carbon dioxide to increase the pressure of the system to 10MPa-30MPa, and the temperature of the heating system reaches 40°C-130°C; 2 The dyeing fluid circulates between the inner and outer layers of the curled fabric, which is conducive to the uniform adsorption, penetration and fixation of the dyes inside the fibers; the pressure and temperature are maintained, and the cycle dyeing time reaches 40min-120min. After the cycle dyeing time is completed, reduce the system pressure to 3 MPa-8MPa, reduce the system temperature to 20°C-50°C, and recover the dye, solvent and carbon dioxide through the separation tank; input a certain amount of carbon dioxide through the booster pump to reach a certain super Under critic...

Embodiment 3

[0052] Weigh 1g of vat dye yellow and 5ml-10ml of co-solvent and mix them into the dye kettle; weigh 100g of polyester / cotton blended fiber fabric pretreated with natural fiber expansion agent, wind it flat on the dyeing shaft and put it into the dyeing tank. kettle; input liquid carbon dioxide through a booster pump to increase the system pressure to 10 MPa-30MPa, and heat the system to a temperature of 40°C-130°C; 2 The dyeing fluid circulates between the inner and outer layers of the curled fabric, which is conducive to the uniform adsorption, penetration and fixation of the dyes inside the fibers; the pressure and temperature are maintained, and the cycle dyeing time reaches 40min-120min. After the cycle dyeing time is completed, reduce the system pressure to 3 MPa-8MPa, reduce the system temperature to 20°C-50°C, and recover the dye, solvent and carbon dioxide through the separation tank; input a certain amount of carbon dioxide through the booster pump to reach a certain ...

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Abstract

The invention is applicable to the field of dyeing technologies, and provides a vat dye dyeing method using a supercritical CO2 fluid. The vat dye before a reduction reaction is dissolved by a supercritical CO2 fluid; polyester fiber, cellulosic fiber, protein fiber and fabric thereof are dyed; meanwhile, a cosolvent is added to improve the solubility of the vat dye in the supercritical CO2 fluid, the dyeing depth and the like; moreover, a natural fiber swelling agent is added for the vat dye to enter the fiber for dyeing, thereby greatly saving the water resources and realizing a perfect dyeing effect.

Description

technical field [0001] The invention belongs to the field of dyeing technology, in particular to a supercritical CO 2 Fluid vat dyeing method. Background technique [0002] With the rapid development of the textile industry, the environmental pollution caused by the textile production process has attracted increasing attention. The country has enacted a series of strict environmental laws and regulations in succession to supervise the sewage treatment and discharge of industrial circles. According to statistics, the ratio of fabric weight to water consumption for textile printing and dyeing processing is as high as 1:100-1:150, and the national water consumption for printing and dyeing processing is estimated to be 1.6 billion tons a year. At present, the proportion of reclaimed water reuse in the production process of this industry is very low, while the proportion of sewage treatment and discharge to production costs is gradually increasing. [0003] The traditional dye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/22D06P1/94D06P1/92D06P1/613
Inventor 郑光洪阳建斌郑雄
Owner CHENGDU TEXTILE COLLEGE
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