Abstract
Cotton fabrics pretreated with cationic polyacrylamide with quaternary ammonium group were dyed with three reactive dyes in the absence of salt by cold pad-batch dyeing method. The influences of various conditions in the dyeing process, including urea dosage, selection of alkali agent and its dosage, batching time and batching temperature on colour yield, were analyzed. Fastness properties of the dyed cotton and the dye penetration were investigated between the pretreated and untreated cotton. The results showed that the dyesK/Svalues of the pretreated cotton were improved compared with those of the untreated one, in addition, the penetration and fastness properties of the dyed cationic cotton were satisfied for application.
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