High Temperature High Pressure Dyeing Machines
topic
HT-HP dyeing machines including pressure jet, beam, and package dyeing vessels operate at temperatures above 100 degrees Celsius up to 140 degrees Celsius under sealed pressure to dye polyester, polyester-cotton blends, and acetate fibres with disperse dyes that require elevated temperature for fibre swelling and dye penetration, with machine pressure vessel construction rated for 4 to 6 bar working pressure and indirect heating through heat exchanger systems.
Role
Enables dyeing of polyester and polyester blend fabrics with disperse dyes at the temperatures required for dye penetration into the crystalline polymer structure that is inaccessible at atmospheric boiling temperature, with HT dyeing being the only practical dyeing method for polyester that achieves adequate colour depth and wash fastness at economically acceptable processing times.