Anhydrous 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 environmental pollution, low color fastness rate of reactive dyes, low color fastness level of printed textiles, etc., and achieve the effect of improving the color fastness rate

Active Publication Date: 2019-09-13
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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  • Anhydrous reactive dye printing paste and printing process
  • Anhydrous reactive dye printing paste and printing process
  • Anhydrous 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 comprises preparation of anhydrous reactive dye printing paste, printing, drying and aftertreatment. The preparation of the anhydrous reactive dye printing paste comprises the following steps: S1, taking a predetermined amount of dimethylformamide (DMF) and adding a predetermined amount of polyurethane into the dimethylformamide; and S2, taking a predetermined amount of polyurethane solution prepared in the step S1, adding a predetermined amount of reactive dye and a predetermined amount of halogenated hydrocarbon into the polyurethane solutionand continuously stirring for 10 to 30 minutes to obtain the anhydrous reactive dye printing paste. The anhydrous reactive dye printing paste consists of the following components in percentage by weight: 35 to 47.5 percent of dimethylformamide, 2.5 to 15 percent of polyurethane, 0.5 to 1.5 percent of reactive dye and 37.5 to 62.5 percent of halogenated hydrocarbon. Thus, in a paste system of halogenated hydrocarbon/DMF/polyurethane, reactive dye molecules are rapidly pushed and attracted to fiber and then are adsorbed by the fiber at once, and the obtained printing textile product has clear boundary and has high color fastness; and the anhydrous reactive dye printing paste has simple components and is simple in 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 hand feeling of printed fabrics, they are the main dyes for cotton fabric printing. However, traditional reactive dyes have the problems of serious waste, consumption of a large amount of water, and discharge of a large amount of high-chroma 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] An article titled "Solvent Dyeing of Cotton Dyed with Reactive Dyes" is published in the "Journal of the Association of Dyers"....

Claims

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Application Information

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Patent Type & Authority Applications(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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