Abstract

Disperse dye has a good dyeing property in silicone waterless dyeing system. However, the application of dispersants in this dyeing system has some problems such as unlevel dyeing, dull color, color spot. In this investigation, the effect of dispersant on the disperse dyeing was studied by adding sodium salt of poly naphthalene sulphonic acid into silicone waterless dyeing system. If the dispersant and the dyeing accelerant were used in the same bath, the fixation and level dyeing property of disperse dye would be influenced. Moreover, the more the amount of dispersant, the more dye aggregates on the fabric surface. The particle size and scanning electron microscope analysis were used to further investigate the aggregation of dyes. The results showed that more disperse dyes would be dispersed in the accelerant phase, and the aggregation of disperse dyes was enhanced, thus the aggregations of dyes and dispersants would be sticked on the fabric surface, which was the main reason leading to the poor level dyeing property. Therefore, the dispersant cannot be employed in the silicone waterless dyeing system with accelerant, which indicates the commercial disperse dye is not suitable for dyeing polyester fabric in the silicone waterless dyeing system.

摘要

分散染料在有机硅无水染色体系中具有良好的染色性能。但在该染色体系中使用分散剂存在染色不匀、色泽暗淡、色斑等问题。本研究通过在有机硅无水染色体系中加入聚萘磺酸钠盐，研究了分散剂对分散染色的影响。如果分散剂和染色促进剂在同一浴液中使用，会影响分散染料的固色性和匀染性。而且，分散剂的用量越多，织物表面的染料聚集体就越多。粒度和扫描电子显微镜分析用于进一步研究染料的聚集。结果表明，更多的分散染料会分散在促进剂相中，并且分散染料的聚集增强，染料和分散剂的聚集物会粘附在织物表面，这是导致匀染性差的主要原因。因此，该分散剂不能用于含促进剂的有机硅无水染色体系，说明市售分散染料不适用于有机硅无水染色体系中涤纶织物的染色。