波特丝改性漂白一浴法及无盐活性染色工艺

One-bath modification and bleaching of pupa-protein viscose filament yarn and the salt-free reactive dyeing technology

针对蚕蛹蛋白黏胶长丝(简称PPV,又称波特丝),研究了使用自制阳离子改性剂WLS和双氧水的改性漂白一浴法工艺,并对其活性染料无盐染色工艺进行了分析。结果显示,一浴法中改性剂的加入不影响双氧水的漂白作用,双氧水的存在也不影响改性剂的改性效果,因此改性漂白可在一浴中进行;改性漂白后波特丝的断裂强力下降不明显;阳离子改性剂WLS的最佳用量为20 g/L,碳酸钠的最佳用量为4g/L。同时发现,经改性漂白一浴法处理的波特丝可实现无盐活性染色,最佳固色温度为85℃,固色剂碳酸钠的最佳用量为9 g/L;与未经过改性且未经过漂白的波特丝的上染率和固色率相比,前者的上染率和固色率均较高,其提高的程度随活性染料结构的不同而不同。

This paper studies the one-bath modification and bleaching technology for the pupa-protein viscose filament yarn (PPV) by using the self-prepared cationic modifier WLS and hydrogen peroxide solution, and analyzes the salt-free reactive dyeing technology. The results show that the application of modifier does not influence the bleaching effect of hydrogen peroxide solution in the one-bath process, and the existence of hydrogen peroxide solution also does not influence the modifying effect of the modifier, thus it can be concluded that the modification and bleaching can be applied in one-bath. In addition, the breaking strength of pupa-protein viscose filament yarn does not go down obviously, the optimized concentration of WLS is 20 g/L, and 4 g/L for sodium carbonate. It is also found that the salt-free reactive dyeing is suitable for the modified and bleached pupa-protein viscose filament yarn with the optimized fixation temperature 85 ℃ and concentration of sodium carbonate 9 g/L. Furthermore, compared to the pupa-protein viscose filament yarn without modification and bleaching, the dye-uptake and fixation yield after being modified and bleached are both obviously improved, which varies with structural changes of reactive dyes.