棉织物的阳离子化改性及其活性染料无盐染色

Cationization of cotton and its reactive dyeing without salt

棉织物经阳离子改性剂处理后,在无盐情况下用活性染料染色。优化的改性工艺为:改性剂质量分数4%(om f)、NaOH质量浓度4 g/L,40℃改性30 m in;改性织物染色工艺为:活性黑RWN 4%(om f),染色温度40℃,上染时间5 m in,浴比1∶30,纯碱10 g/L,固色60 m in。改性织物可以达到常规染色织物的色深值(K/S值),且匀染性良好;与未改性棉织物相比,改性棉织物的耐摩擦色牢度和耐水洗色牢度下降了0.5级。

Cotton fabric is pretreated with cationic modifier, and then dyed with reactive dyes without salt. The optimum modifi- cation process is： modifier 4% （ omf）, NaOH 4 g/L, treating at 40 ℃ for 30 min. The dyeing process of the modified fabric is. Reactive Black RWN 4%（omf） ,dyeing temperature 40 ℃,dyeing time 5 min, liquor ratio 1 ： 30,soda ash 10 g/L,fixation time 60 min. Compared with the unmodified fabric, the color fastness to rubbing and washing of the modified cotton fabric declines 0.5 grade. The modified dyeings have similar color depth （K/S value） with those of the conventional dyeings, and the level- ness is good.