THE INVESTIGATION OF THE EFFECT OF CHEMICAL MODIFICATION WITH CHITOSAN TO PROVIDE SINGLE BATH DYEABILITY OF NYLON / COTTON BLEND FABRICS

Abstract

In this study, it was aimed to make each fiber components dyeable with a single dyestuff so that nylon / cotton blend fabrics can be dyed in the same bath. For this purpose, it was aimed to make each of these fibers dyeable with anionic dyes by cationization with chitosan. The chitosan applications made in foulard were made in two different ways using only cross-linking resin and cross-linking resin + chitosan. Then, treated and untreated fabric samples were dyed with different dye classes (wool reactive, cotton reactive, 1:2 metal complex). As a result of the trials, it was ensured that both the depth and nuance of the front and back sides of the fabric were same in the case of adding 1: 2 metal complex dye having affinity to the nylon and cotton reactive dye having affinity to cotton in addition to the wool reactive. Optimum results obtained from laboratory scale studies were also tested in mill conditions and satisfactory results were obtained in terms of color and washing, water, perspiration and light fastness values. However, it has been revealed that the wet rubbing fastness values are low and there are unevenness problems in the dyed fabric. For this reason, it is important to note that, even if chemical modification process with chitosan have been successful in laboratory-scale studies, this process have some limitations for being used in large scale production in mill conditions. © 2022. Tekstil ve Muhendis. All Rights Reserved.