大豆蛋白/聚乙烯醇共混纤维活性染料变性浴染色

 在碱性条件下,部分活性染料在上染纤维的同时,将被水解而“失活”。但是由于已经“失活”的活性染料的结构和酸性染料相似,因此可以利用改变染色浴酸碱性的方法使活性染料实现第2次上染,即所谓的“变性浴”,从而达到提高染料利用率和减少染色污水排放的目的。对大豆蛋白/聚乙烯醇共混纤维采用活性染料变性浴的染色方法,可以达到良好的效果。

Dyeing of the soybean protein/PVA hybrid fiber with reactive dyes in denaturated bath

When dyeing fiber in alkali bath,part of reactive dyes will be hydrolyzed and then become inactivated.Since the inactivated dyes have a similar structure to that of acid dyes,they can be utilized to re-dye the fiber by changing the power of hydrogen of the dyeing bath,so called the denaturated bath.This dyeing process can enhance the dye up-take rate and reduce the discharge load of effluent.Experiments show that good result has been achieved when the bi-component soybean protein/PVA hybrid fiber is dyed by the denaturated bath of reactive dyes.