One bath process of bleaching and dyeing of polyester-cotton knitted fabrics
Based on the problems of long dyeing and finishing process,high water and energy consump-tion and low production efficiency of polyester-cotton knitted fabrics,polyester-cotton knitted fabrics were processed by RY236 in one bath,and the effects of hydrogen peroxide dosage,pH value of dyeing bath,dye-ing time,the dosage of RY236 on the effect of pre-treatment of cotton knitted fabrics and the effect of dye-ing of polyester knitted fabrics were discussed.The optimized one-bath process was as follows:hydrogen peroxide dosage of 8 g/L,pH of 5.5,RY236 dosage of 1 g/L,dyeing temperature of 130℃,and heat preserva-tion of 30 min,which could reduce the production cost and improve the production efficiency compared with the traditional process.
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