Abstract:

In order to promote open-width cold pad-batch process of cotton knits, a novel low temperature bleaching compound additive Texbleach DZ-1 was applied to cold pad-batch pretreatment process of cotton knits. Influences of the dosage of Texbleach DZ-1, caustic soda, hydrogen peroxide and batching time on fabric whiteness were studied and the optimized process conditions were determined. Then cold pad-batch dyeing of bleached fabric was carried out with Argazol CBM reactive dyes. The results showed that the whiteness and wettability of fabric treated by cold pad-batch pretreatment using Texbleach DZ-1 is similar to those by  conventional high temperature and conventional cold pad-batch pretreatment process, while the strength loss is obviously reduced. Under the same dosage of Argazol CBM reactive dyes, the fabric dyed by cold pad-batch dyeing process has the same yield color, fixation and fastness, which pretreated by the above three different kinds of pretreatment processes, it shows the improvement of color depth and fixation of cotton knits dyed by cold pad-batch dyeing method compared with exhausted dyeing method.

Key words: low temperature bleaching activator, cole pad-batch pretreatment, cold pad-batch dyeing, cotton knits