Study of processes of dyeing polyurethane fibres by various classes of dyes

Processes of dyeing polyurethane fibres with various classes of dyes, e.g., disperse and cationic, procinyl and acid, etc., were studied. Relationships of dyeability with dyeing temperatures were derived and kinetic and diffusion parameters of dyeability were investigated. Parallel studies of polyester, polyamide, and polyacrylonitrile fibres, and of wool were made for a comparison. The influence of dyeing conditions on the physicomechanical strength of polyurethane fibre was examined. The stability of the obtained colors on polyurethane fibre against external service impacts is evaluated.