One bath dyeing of nylon/cotton mixture with neutral fixation reactive/acid dyes

The neutral fixation reactive dyes and acid dyes were applied to dyeing nylon/cotton mixture by one-bath process.The stain performance of neutral fixation reactive dyes on nylon and acid dyes on cotton were analyzed.The effects of dyeing temperature,dosage of sodium chloride on dyeing behavior were dis cussed.The color fastness of neutral fixation reactive dyes and acid dyes on nylon/cotton blend fibers were al so investigated.It was found that the neutral fixation reactive dyes less stained on nylon,acid dyes also less stained on cotton,and the K/S value of dyed nylon and cotton fabrics increased with the increase of dyeing temperature and dosage of sodium chloride.The proper dyeing process of nylon/cotton mixture was:addition neutral fixation reactive dyes and acid dyes,dyeing at 95 ℃ pH 7 for 60 min,the dosage of NaCl determined by the amount of reactive dyes.The color fastness of nylon/cotton blend fabric was above level 4 after fixa tion,which could meet the demand of wearing.