Method for reducing dyeing rate of reactive dye solvent system
A technology of reactive dyes and surfactants, applied in the field of dyeing and finishing, can solve the problems of limited solubility, poor permeability and levelness, fast coloring, etc., and achieve the effect of easy operation and simple process
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Embodiment 1
[0022] Ethanol is added to the aqueous solution of dissolving dyes to form a co-solvent solution with a volume ratio of 9:1, and 0.01 g / L of cationic surfactant is added to the co-solvent solution. At room temperature, the pre-swelled cellulose (with liquid rate 60%) the fabric is immersed in the dyeing solution, the bath ratio is 1:10, then the temperature is raised to the dyeing temperature of 60°C at a rate of 1°C / min, and kept for 60min, then 5ml (5g / L) of soda ash solution is added, and the temperature is raised to solid The color temperature is 80°C and kept warm for 30 minutes, the fabric is taken out, washed with water, soaped, washed with water, and dried. After adding the cationic surfactant, it was found that the dye uptake rate in 20 minutes could be reduced from 83% to 41%, and the final fixation rate was basically the same.
[0023] The dye solution prescription is as follows: reactive brilliant red KE-7B (C.I. reactive red 141) 1%, cationic surfactant 0.5g / L, th...
Embodiment 2
[0026] Propylene glycol methyl ether is added in the aqueous solution of dissolving dyestuff, is made into the volume ratio 5: 1 co-solvent solution, the cationic surfactant of 1g / L is added in co-solvent solution, under room temperature condition, pre-swelled cellulose (with liquid rate 80%) the fabric is immersed in the dyeing solution, the bath ratio is 1:20, and then the temperature is raised to the dyeing temperature of 40°C at a speed of 1.5°C / min, and kept for 40min, then 1ml of soda ash solution (20g / L) is added, and the temperature is raised to solid The color temperature is 70°C and it is kept warm for 60 minutes. The fabric is taken out, washed with water, soaped, washed with water, and dried. After adding the cationic surfactant, it is found that the dye uptake rate can be reduced from 71% to 35% in 20 minutes, and the final color fixation rate is basically the same.
[0027] The dye solution prescription is as follows: active dark blue M-2GE (C.I. active blue 194)...
Embodiment 3
[0030] Isopropanol is added to the aqueous solution of dissolving dyes to form a co-solvent solution with a volume ratio of 7:1, and 5 g / L of cationic surfactant is added to the co-solvent solution. At room temperature, the pre-swelled cellulose (with liquid rate 100%) the fabric is immersed in the dyeing solution, the bath ratio is 1:15, then the temperature is raised to the dyeing temperature of 70°C at a speed of 2°C / min, and kept for 40min, then 3ml of soda ash solution (10g / L) is added, and the temperature is raised to solid The color temperature is 100°C and kept warm for 20 minutes, the fabric is taken out, washed with water, soaped, washed with water, and dried. After adding the cationic surfactant, it was found that the dye uptake rate in 20 minutes could be reduced from 74% to 38%, and the final fixation rate was basically the same.
[0031] The dye liquor prescription is as follows: reactive yellow KE-4R (C.I. reactive yellow 84) 1%, cationic surfactant 2g / L, the ...
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