Dyeing of polyester knitted fabric with disperse dyes in one-component, two-component and three component system

In this study, the dyeing of polyester knitted fabric in one-component - red dye, two-component - red + yellow dye and three-component dyeing system - red + yellow + blue dye was investigated. Polyester is one of the most commonly used synthetic fibers. It has a hydrophobic nature and excellent mechanical properties such as tensile strength and excellent wear resistance. These fibers are usually dyed with disperse dyes that are poorly soluble in water and it is necessary to add auxiliary agents for better solubility. In the experimental part, 100% polyester knitted fabric was used, which was dyed with one, a mixture of two and a mixture of three disperse dyes with the addition of acetic acid and a dispersing agent. The dyeing time was 60 min, while the dyeing temperature was 135 °C. The bath ratio was 1:20. The dye concentrations were 1 and 4%. The dyeing efficiency was analyzed through the K/S values and CIELab parameters. Based on the obtained results, sample dyed with 4% dye in the three-component dyeing system has the highest K/S value.