Abstract
Dyeing of nylon by two acid dyes at 70°C and pH 6 in the presence of surfactants and polyelectrolytes has been studied. The results show that the dye adsorptions are decreased with increased concentration of anionic and cationic surfactants. In contrast, amphoteric surfactants show increased dye adsorptions with increasing concentration of the surfactants. Furthermore, it is found that the adsorptions increase with an increase in the concentration of polyelectrolytes. The role of these additives on the dyeing is discussed in terms of the adsorption isotherms of the acid dyes on nylon.
