以酯型分散染料/乙烯砜型活性染料为地色的涤棉混纺织物防拔染印花新工艺

A New Process of Resist-Discharge Printing on T/C Fabrics using Ester Type Disperse Dyes and Vinyl-Sulfone Type Reactive Dyes for Ground Dyeing

酯型分散染料遇碱水解,变成可溶性羧酸钠盐,而失去与涤棉织物的上色能力,且易为以后的水洗而洗除;利用某些化学试剂对乙烯砜型活性染料产生亲核加成反应,而使之丧失对纤维素纤维的键合能力。因此可以采用碱剂和羟甲基磺酸盐类、亚硫酸钠等作防拔染剂。文章较为详细地介绍了这一新工艺的流程、处方和其他有关工艺参数。

The hydrolysis of ester type disperse dyes takes place in water and thus form soluble sodium carboxylate,thus losing its dyeing ability and being washed out easily.By making use of the ability of chemical agents forming neucleophilic additive reacting products with vinylsulfone reactive dyes, the dyes will loss its reactivity to cellulosic fibres. The usual resist-discharge agents are alkali agents, carboxymethyl sulfonates and sodium sulfites etc. The process of the new technique, its recipes and other related technical parameters are also presented in details in the paper.