海岛型锦纶超纤PU革的拼混染色

Combination dyeing of sea-island nylon superfine fiber PU synthetic leather

为改善单一类型染料对海岛型锦纶超纤PU革的染色效果,采用了分散染料与酸性染料拼混染色方法.通过对透染性、干湿摩擦牢度、皂洗牢度、K/S值和上染率的考查,确定了关键工艺参数,并探讨了染色顺序、固色剂对染色效果的影响.结果表明:先酸性后分散染色,且2种染料质量分数分别为4%和2%时具有最好的综合染色效果;以APA固色效果最佳,染前加入使染色更均匀、无色花;染后加入可提高干摩擦牢度至4级,湿摩擦牢度和皂洗牢度至3级以上,并可小幅提高K/S值.

Combination dyeing with disperse and acid dyestuff was employed to improve the dyeing effect on sea-island nylon superfine fiber PU synthetic leather with single dyestuff.A few critical parameters were ascertained and the effects of dyeing sequence and fixing agents were also discussed by investigating dyeing penetration,rubbing color fastness,washing color fastness,K/S value and uptake rates.The results show that the optimum effect occurred when the dyeing with disperse dyestuff is performed after that with acid dyestuff.The amount of acid and disperse dyestuff is 4% and 2%,respectively.APA has the best fixing effect.The color is more uniform when APA is added before dyeing.And there are no colored spots.However,dry rubbing fastness can be enhanced to 4.0 and wet rubbing fastness and washing fastness can be enhanced to above 3.0 when APA is added after dyeing.Furthermore,K/S value can also be improved slightly.