Dyeing Behaviour of Aqueous Solutions of Dispersant-free Disperse Dyes in the High-temperature Dyeing of Polyester (Part 1)

High-temperature dyeing of polyester with dye dispersions and dispersant-free disperse dyes dissolved in the presence of a surfactants mixture has been simulated with the aid of both a previously developed and a new mathematical model, and the exhaustion kinetics have been computed for three dyes with the aid of experimentally determined dyeing parameters. The correctness of the model was tested by experimentally determined exhaustion curves. An equilibrium in the system consisting of a substrate, dye and surfactant mixture has been investigated experimentally as a function of the temperature and of the concentrations of the dye