Abstract:

In order to solve the problem on poor alkali resistance of disperse dyes in colored burnt-out printing on polyester fleece fabric, the visible absorption characteristics of disperse dyes under high temperature alkaline conditions and the performance of colored burnt-out printing on polyester fleece fabric were studied. Disperse dyes with good alkali resistances were selected by analyzing the alkali resistance of different disperse dyes. Meanwhile disperse red SXF and disperse bright red SXF wereanalyzed; the influence of disperse dye structure on alksli resistance was discussed. The results show that disperse bright red SXF and other five disperse dyes have good alkali resistance, and the performance of colored burnt-out printing on polyester fleece fabric is good when the concentration of NaOH is 25%. The main structures of disperse red SXF and disperse bright red SXF have little influence on alkali resistance, while the substituent has significant influence. The cyano-containing dye has better alkali resistance than ester group-containing dyes.

Key words: polyester, fleece fabric, disperse dye, burnt-out printing, alkali resistance