Tensile Characteristics of Rotor and Friction Spun Jute Blended Yarns

This paper reports the successful outcome of attempts to produce jute blended yams of lower counts using two spinning systems, open-end rotor and friction (Dref-2), and also some understanding of their structure-property relationships. The study investigates such understanding as exists about jute blended yams spun on these two systems and their tensile and viscoelastic behavior as influenced by their respective yam structures. The tensile and viscoelastic characteristics of rotor and friction (Dref-2) spun jute blended yams depend partly on fiber alignment and partly on the noncompatibility of the tensile properties of their component fibers. Time-dependent stress relaxation of yam is proposed to depend on fiber stress-relaxation and rearrangement of fiber segments within the yarn subjected to deformation. Although highly entangled fiber helices with widely varying orientation, as present in friction spun yam, cause a poor fiber-to-yarn translation of tensile properties, they make the yam more elastic.