A STUDY ON IMPROV？NG THE QUAL？TY OF THE BOBB？N DYE？NG AND REDUC？NG YARN WASTE

Among the yarn dyeing methods, dyeing in the bobbin is known as the most commonly used method. Low production costs, ease of use and high quality dyeing feature are the most important advantages of this method. The efficiency of the dyeing process and the quality of the dyed yarn depend on the type of yarn, the type of dyestuff used, the dyeing recipe and the dyeing parameters. Besides, the winding structure parameters of the bobbin and the structure of the dyeing tops significantly affect the quality of the dyed yarn. In this study, the effect of the bobbin structure on the dyeing quality and the amount of yarn waste of dyed yarn was investigated experimentally. The experiments were carried out for different numbered cotton yarns wrapped in different tops during dyeing with reactive dyes. As a result of the research, important results have been obtained for improving the quality of the dyed yarn and reducing the yarn waste