The Mechanism of the Dyeing of Polyester Fibres with Disperse Dyes

Measurements of the diffusion coefficients and saturation values of seventeen disperse dyes on Dacron polyester fibre under dyeing conditions seem to indicate that the differences in diffusion coefficient between the individual dyes are mainly due, after elimination of geometrical effects, to energy effects associated with the formation of hydrogen bonds, the dye being the proton donor. The efficiencies of three different carriers were approximately the same if equimolar quantities were present inside the fibre.