针对活性染料常规染棉织物工艺中纯碱用量过多的问题,采用新型的低碱活性染料对棉织物进行染色.分析了工艺参数如盐、碱及温度等对 K/S 值的影响,得到了低碱活性染料染棉织物较佳工艺：染料1%(owf)时,纯碱1.5g/L ,元明粉70g/L ,80℃固色40min ,浴比1∶25；染料5%(owf)时,纯碱3g/L ,元明粉80g/L ,80℃固色60min ,浴比1∶25.低碱活性染料染色所需纯碱用量少,仅为传统活性染料染色时纯碱用量的1/10左右,染色织物得色量高,且染色工艺简单.% Novel low-alkali reactive dyes are used to dye cotton fabric because the amount of soda is excessive in conventional dyeing cotton fabric process with reactive dyes .This thesis discusses the factors affecting the K/S values ,including salt ,soda and dyeing temperature ,etc .According to the results ,the favorable conditions under which cotton fabric is dyed with low -alkali reactive dyes is shown as follows .When low-alkali reactive dye is 1%(owf),the concentration of Na2 CO3 is 1.5 g/L ,the concentration of Sodium Sulfate is 70 g/L ,fixation is carried out at 80℃ for 40 min and the liquor ratio is 1∶25;when low-alkali reactive dye is 5%(owf),the concentration of Na2 CO3 is 3 g/L ,the concentration of Sodium Sulfate is 80 g/L ,fixation is performed at 80℃ for 60 min ,and the liquor ratio is 1∶25.The sodium carbonate needed by Low alkali dyeing fabric is only 10% of that required when traditional reactive dyeing is used to dye fabric .Besides ,it has high color yield and good fastness to rubbing and soaping .
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