Reactive dye bath and dyeing process for textiles
AssigneeThe Hong Kong Research Institute of Textiles and Apparel Limited
InventorYee Man Edwin Keh
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Abstract
The present invention relates to a reactive dye bath and a dyeing process for textiles. The reactive dye bath for textiles comprises an organic solvent, an aqueous dye solution, a surfactant and a co-surfactant. The reactive dye bath or the dyeing process of the present invention allows for full up-take of the dye without subjecting the textiles to any special pre-treatment and without the addition of a salt for accelerating dyeing, so as to obtain dyed textiles with a higher dyeing depth, uniformity and fastness.
Claims9
A reactive dye bath for textiles, characterized in that the reactive dye bath comprises a dye emulsion comprising an organic solvent, an aqueous reactive dye solution, a surfactant and a co-surfactant, wherein said aqueous reactive dye solution has a mass ratio of the reactive dye to water is 1:10-200, and wherein the volume ratio of said aqueous reactive dye solution to said organic solvent is 1:1-20.
A process for dyeing a textile, characterized in that the process comprises the following steps:
- (i) preparing a dye bath by uniformly mixing an organic solvent, an aqueous dye solution, a surfactant and a co-surfactant;
- (ii) immersing the textile in the dye bath with a bath ratio of 1:5-50, a dyeing time of 10-60 minutes and a dyeing temperature of 40-80° C.;
- (iii) removing the textile from the dye bath and squeezing the textile to remove the dye solution until a take-up of 50-150%;
- (iv) adding a predetermined amount of an aqueous fixation agent solution to the dye bath, and stirring and mixing the aqueous fixation agent solution and the dye solution until uniform;
- (v) re-immersing the textile in the dye bath, to which the aqueous fixation agent solution has been added, with a fixation time of 15-90 minutes and a fixation temperature of 40-80° C.;
- and
- (vi) removing the textile from the dye bath, squeezing the dye solution out of the textile;
- washing floating colours out of the textile, and hanging and air-drying the textile.
Dependencies are inferred from the claim text.