Dyeing of Polyester Fibres Using Ultrasound

Ultrasound has been used in the dyeing of polyester fibres with disperse dyes at low temperature, and results compared with those achievable in conventional dyeing at the boil using a carrier. Dyeings were enhanced in presence of carrier and by pre-swelling fibres, although the results obtained were not generally as good as those that can be obtained in conventional high-temperature processes. Taking into account the energy consumption aspect, ultrasound appears to be a promising technique for dyeing