Abstract:

The kinetic data were investigated and compared based on three fibers(bio-based PA56、PA6、and PA66) dyeing with acid blue NHFS. The diffusion coefficient, dyeing rate constant transfer coefficient and half-dyeing time were measured through percentage of dyeing curve and dyeing rate of three yolyanide fibers with Acid Blue NHFS were compared.The relationship structure and dyeing properties of PA56 was explored. Analysis shows that the dyeing rate constant transfer coefficient and diffusion coefficient of PA56 are significantly higher than PA6 and PA66 and the half-dyeing time is the shortest; The K/S values of PA56 are significantly higher than PA6 and PA66 when polyamide fibers are dyed at the same temperature. Therefore, it needs a short time to get a darker color when PA56 are dyed with acid blue NHFS.

Key words: bio-based polyamide56, polyamide fiber, acid dyestuff, acid dyestuff, dyeing kinetic