Abstract:

 Undried poly(p-phenylene terephthamide)（PPTA）fibers are used to be dyed with cationic dyes and disperse dyes. The effects of fiber moisture content, dyeing temperature, types and amount of dyes on the dyeing properties are studied. Compared with dried PPTA fibers, dyeing with undried fibers can obviously improve the dyeing rate and K/S value of PPTA fibers. Moreover, the color fastness of dyed fibers to soaping and rubbing are excellent, and dyeing will not affect the original mechanical properties of PPTA fibers.

Key words: poly (p-phenyleneterephthamide) fiber, cationic dye, disperse dye, dyeing