WETFASTNESS OF DISPERSE DYES ON POLYESTER MICROFIBER

The wetfastness of polyester fiber dyed with disperse dyes was studied . The degree of thermomigration was found to be the most important fac tor that can lower wetfastness on polyester, In addition to thermomigr ation, investigation of the affinity of each disperse dye on fiber for staining is important. Three target dye properties were found useful for development of new disperse dyes with high wetfastness properties- low degree of thermomigration, reduced solubility in the laundering ba th, and easy decomposition in the laundering bath.