LAUSR

In this research, the influence of dye structure and dyeing temperature on the adsorption of acid dyes onto polyamide 6 knitwear (PA 6) was studied. Three acid dyes with different amounts of sulphonic groups, namely C. I. Acid Red 88, C. I. Acid Red 14, and C. I. Acid Red 18 were used. Dyeing was performed in a Launder-ometer apparatus at 40°C and 60°C, at pH 4. The samples were taken out of the apparatus at different time intervals. The results showed that both dye structure and dyeing temperature affected the adsorption of acid dyes onto PA 6 knitwear. The rate and quantity of adsorption increased with an increase in dyeing temperature and a decrease in the number of sulphonic groups in dyes.