Improvement of dyeing technology of purple reactive dye

Abstract

The invention discloses an improvement of a dyeing technology of a purple reactive dye. The improvement comprises the following steps: by adopting a constant-temperature method, heating to 55 DEG C, adding a dye, dyeing at the temperature, alkalifying and performing color fixation, wherein enough color fixation time is guaranteed, the amount of salt and alkali can be determined according to the performance of brilliant blue R so as not to exceed 50g / L and 20g / L, the minimal dyeing performance difference of two dyes can be achieved to further achieve the colored light stability.

Description

[0001] technical field [0002] The invention belongs to a fabric dyeing process, and in particular relates to an improvement of a purple reactive dye dyeing process. [0003] Background technique [0004] The dyeing formula of purple reactive dyes is generally combined with Brilliant Blue R and Brilliant Red 3BF, and the color pattern is relatively small, but because Brilliant Blue R and Red 3BF have different requirements on time, temperature, and salinity, resulting in stable color light Sex is more difficult to control, and the possibility of cylinder difference is the greatest. The difficulty of this formula is that after adding alkali, Brilliant Blue R cannot be dyed directly, but forms a structure with low solubility but can be dyed. However, the dyeing speed of red 3BF is much faster after adding alkali. At this time, the dyeing of the two dyes There is a large difference in performance, which is the key time to cause various dyeing defects, and the red color will ...

AI Technical Summary

Problems solved by technology

[0004] The dyeing formula of purple reactive dyes is generally combined with Brilliant Blue R and Brilliant Red 3BF, and the color pattern is relatively small, but because Brilliant Blue R and Red 3BF have different requirements on time, temperature, and salinity, resulting in stable color light Sex is more difficult to control, and the possibility of cylinder difference is the greatest

The difficulty of this formula is that after adding alkali, Brilliant Blue R cannot be dyed directly, but forms a structure with low solubility but can be dyed. However, the dyeing speed of red 3BF is much faster after adding alkali. At this time, the dyeing of the two dyes There is a large difference in performance, which is the key time to cause various dyeing defects, and the red color will gradually lag behind in the later stage of dyeing, that is, the color fixing time of 40 minutes is much more red than that of 30 minutes, which also causes color instability. one of the factors