Polyester can be dyed with disperse dye in different method. Carrier, High temperature high pressure method and Pad-thermosol methods are available for polyester fabric dyeing. But HTHP method is mainly used as the other methods have some drawbacks. There are some vital differences between these methods.
Here some key differences are enlisted below:
Carrier method | HTHP method | Thermosol method |
Carrier is required no thickener is used | Neither carrier nor thickener is used | Carrier is not used but thickener used |
Lower dyeing Temperature (80°- 100°C) | Higher dyeing temperature (125°- 140°C) | Very high temperature (180°- 220°C) |
Costly, as carrier used | Not so costly / Cheap | Costly, due to this process required special arrangement |
Toxic and unhygienic process due to carriers | Non-toxic and hygienic process | Non-toxic and hygienic process |
Removal of carrier is difficult and alkali is used | Not applicable | Not Applicable |
No change is shade | No change in shade | Change in shade due to sublimation |
More shrinkage | Most shrinkage | less shrinkage |
Less production | Less production | High production due to continuity |
