8 Key differences between Carrier- HTHP- Pad-Thermosol method

Polyester is a popular man-made fiber. It has a huge market for making apparel. Polyester can be dyed with disperse dye in different methods. Carrier method, High temperature high pressure method and Pad-thermos methods are available for polyester fabric dyeing. There are basic differences between carrier, hthp, pad-thermosol methods. But HTHP method is mainly used because the other methods have some drawbacks.

Carrier Method

The carrier method is used in polyester dyeing. Here carriers are used to swell the polyester fiber as polyester is hydrophobic fiber. It enables the dyeing procedure at atmospheric temperature.

HTHP Method

In the HTHP method, high temperature does the job of opening up the molecular space in the polyester. It carries 130 degrees Celsius. It is a widely used method for polyester dyeing. The carrier method has many drawbacks whereas pad-thermosol method requires huge energy. So, the most suitable method for polyester dyeing is the HTHP method.

Pad-thermosol Method

Pad-thermosol procedure is carried out at 180-220 degrees Celsius. This process uses high heat energy to dye polyester fibers.

Though disperse dye is used for polyester dyeing, Basic dyes too can be used for dyeing cationic dyeable polyester. For basic dye, there is no need of any dispersing agent like disperse dye.

Differences between Carrier-HTHP- Pad thermosol Method

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

The Last Word

Among the three methods, the most suitable one is HTHP method. Want to know more about it? Click Here

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