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Water-free reactive dye printing paste and printing process

A printing color paste and printing process technology, applied in the field of textile dyeing and finishing, can solve the problems of low color fastness level of printed textiles, high COD value of soaping wastewater, low color fixation rate of reactive dyes, etc., to achieve high color fastness, Accelerate the dyeing rate and weaken the effect of charge repulsion

Active Publication Date: 2021-10-19
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the use of penetrants, leveling agents and other auxiliaries, resulting in the adsorption of a large amount of auxiliaries on the cloth sample during the dyeing process, which will cause post-processing difficulties, high COD value of soaping wastewater, environmental pollution and a certain waste of resources. And the fixation rate of reactive dyes is low, and the color fastness level of the printed textiles obtained is low

Method used

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  • Water-free reactive dye printing paste and printing process
  • Water-free reactive dye printing paste and printing process
  • Water-free reactive dye printing paste and printing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] S1, take a certain amount of dimethylformamide, and add a certain amount of polyurethane into the dimethylformamide under stirring, the weight percentage of polyurethane is 30wt%;

[0047] S2, take 50g of a polyurethane solution with a weight percentage of 30wt%, and add 1g of reactive blue 222 to the polyurethane solution while stirring, then add 50g of tetrachlorethylene to the polyurethane solution, continue stirring for 30min, and prepare a dye C at a concentration of 10 g / L 2 Cl 4 -The printing paste of DMF-PU system (50:50), namely obtains the printing paste of anhydrous reactive dyes;

[0048] S3, using the water-free reactive dye printing paste obtained in step S2 to print the textile to be printed;

[0049] S4, taking out the textile and drying it;

[0050] S5, sequentially soaping and washing the dried textiles.

Embodiment 2-5

[0052] Embodiments 2-5 provide a printing process. Compared with Embodiment 1, the difference is that the weight percentage of polyurethane in step S1 is changed. Except for the above differences, other operations are the same and will not be repeated here; the specific parameters are as follows shown in the table.

[0053]

[0054] see figure 1 As shown, from left to right are the samples of Examples 2-5 and Example 1 obtained after drying in step S4. It can be seen from the figure that as the weight percentage of polyurethane (PU) increases, the boundary of the obtained printing pattern (the five-pointed star in the figure) becomes clearer and clearer. It should be noted that when the content of PU is higher than 30wt%, the PU solution cannot be prepared due to too high viscosity.

Embodiment 6

[0056] Embodiment 6 provides a printing process. Compared with Embodiment 1, the difference is that in step S3, Na 2 CO 3 The lye (pure water system) has carried out alkali treatment on the textile to be printed, and the specific operation is as follows:

[0057] S1, take a certain amount of dimethylformamide, and add a certain amount of polyurethane into the dimethylformamide under stirring, the weight percentage of polyurethane is 30wt%;

[0058] S2, take 50g of a polyurethane solution with a weight percentage of 30wt%, and add 1g of reactive blue 222 to the polyurethane solution while stirring, then add 50g of tetrachlorethylene to the polyurethane solution, continue stirring for 30min, and prepare a dye C at a concentration of 10 g / L 2 Cl 4 -The printing paste of DMF-PU system (50:50), namely obtains the printing paste of anhydrous reactive dyes;

[0059] S3`, the Na 2 CO 3 Mix with water, stir evenly to prepare lye; wherein, the bath ratio of lye is 1:20, Na 2 CO ...

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Abstract

The invention provides a printing process, which includes the preparation of anhydrous reactive dye printing color paste, printing, drying and post-treatment. The configuration of anhydrous reactive dye printing paste includes: S1, take a predetermined amount of dimethylformamide, add a predetermined amount of polyurethane to dimethylformamide; S2, take a predetermined amount of polyurethane solution prepared by S1, and add A predetermined amount of reactive dye and a predetermined amount of halogenated hydrocarbon are added to the polyurethane solution, and the stirring is continued for 10-30 minutes to obtain an anhydrous reactive dye printing paste. The anhydrous reactive dye printing paste is composed of the following components: 35-47.5wt% of dimethylformamide, 2.5-15wt% of polyurethane, 0.5-1.5wt% of reactive dyes, 37.5-62.5wt% of halogenated hydrocarbon. In this way, in the color paste system of halogenated hydrocarbon / DMF / polyurethane, reactive dye molecules will be absorbed by fibers immediately after being quickly promoted and attracted to fibers, and the printed textiles obtained have clear borders and high color fastness of printed textiles; the present invention The water-free reactive dye printing paste has simple ingredients and simple preparation process.

Description

technical field [0001] The invention relates to the technical field of textile dyeing and finishing, in particular to an anhydrous reactive dye printing paste and a printing process for printing textiles using the anhydrous reactive dye printing paste. Background technique [0002] Because reactive dyes have the advantages of complete color spectrum, good wet fastness, and soft touch of printed fabrics, they are the main dyes used in cotton fabric printing. However, traditional reactive dyes have the problems of serious waste, large amount of water consumption, and discharge of a large amount of high-color anhydrous that is difficult to handle. In order to avoid the hydrolysis reaction of reactive dyes and improve the utilization rate of reactive dyes, scientists have been studying the dyeing of reactive dyes in non-aqueous media. [0003] The "Journal of the Dyeers Association" published an article titled "Solvent Dyeing of Cotton Dyeing with Reactive Dye", which used dime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/38D06P1/52D06P1/651D06P1/649D06P1/673D06P3/66D06P3/82
CPCD06P1/38D06P1/5285D06P1/6495D06P1/65156D06P1/6735D06P3/66D06P3/82
Inventor 徐卫林夏良君王阿明周思婕付专周佳艳王运利
Owner WUHAN TEXTILE UNIV
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