Cationic modification of silk/cotton union fabric and its dyeing properties

Silk/cotton union fabric was pretreated with color media,followed by dyeing with different reactive dyes in one-bath method aiming at achieving clean reactive dyeing without salt or alkali.The trichromatic reactive dyes suitable for dyeing the modified silk/cotton union fabric in one bath were selected through optimizing via analyzing the balance value of union dyeing K and color-difference △E.The influence of dosages of color media,modification temperature and time on the one bath dyed silk/cotton union fabric was discussed,and the optimal modification process was obtained by orthogonal experiment.The results indicated that compared with the conventional dyeing process,this clean reactive dyeing of modified silk/cotton union fabric without salt or alkali is characterized by improved dye-uptake and fixation rate,better union color,enhanced fiber strength,and equivalent color fastness.