Effects of Dyeing Conditions on the Mechanical and Elastic Recovery Properties of PTT Filament

It was studied that the effects of dyeing conditions on the dye-uptake, cross sectional diameter, mechanical properties, and elastic recovery properties of PTT filament. The results showed that the cross sectional diameter increased and becoming more round with the increasing of the dyeing temperature due to the dye molecules were easy to seep into the filaments at a high temperature. Increasing of dyeing temperature and time would increase the titre and decrease the tenacity, but the initial modulus, elongation and specific breaking work of PTT filament hadn't obvious change. Dyeing process would decrease the drawing recovery and the bending recovery of PTT filament. Increasing the dyeing temperature would increase the drawing recovery but decreasing the bending recovery of PTT filament. Dyeing time would not affect both the drawing recovery and the bending recovery of PTT filament.