Study on the Interactions between Melange Yarn Properties and Fiber Damage

Abstract

Cotton yarns are widely used in manufacturing of various types of fabrics and apparels due to their special physical and aesthetic properties. This work, aims at studying on cotton fiber damage and its effects on cotton melange yarns properties, in production of rotor and ring melange yarns with equal percentages (50/50). Dyed and grey cotton fibers were mixed in draw frame. To assess the fiber damage effect on the dyed and grey cotton fibers assemblies in yarns, 100% dyed and grey yarns were produced as well. After yarn production and random sampling, length parameters of dyed and grey fibers were examined. The results show that dyeing and mechanical process lead to decrease of effective length and increase of short fiber content. Increasing of short dyed fibers in rotor melange yarn caused the drop in tenacity and elongation at break, increased imperfections, unevenness and hairiness in melange yarn. Also fiber damage in rotor melange yarn was more than ring melange yarn due to the further opening by opening roller. These variations are indicative of damage in dyed cotton fibers on melange yarn manufacturing. SEM micrographs confirm that fiber damage occurs in dyed cotton fiber.