Application of high temperature reactive dyes in one-bath dyeing of polyester/cotton fabric
In order to solve the problem of poor dyeing depth in one-bath dyeing of polyester/cotton,the dyeing performance of DPC series reactive dyes on cotton fabrics is investigated,and the effects of dyeing temperature,pH value of dyeing bath,dyeing bath ratio,metameric powder dosage,dyeing time and dosage of dyestuff on the dyeing performance of cotton fabrics are discussed.The optimized dyeing process is as follows:dyeing at 130 ℃ with pH value of 7.0 and Na2SO4 of 100 g/L.The results indicate that DPC series reactive dyes have good lifting power,simple dyeing process and low cost,are suitable for dyeing in medium and dark colors,and the color fastness to soaping and rubbing of the dyed fabric can satisfy the requirements of garment dyeing.
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