Thesis Details

Thesis Title: The effects of polyester fiber modulus on processing performance and yarn properties
Thesis Author: James Welborn
Abstract: The mechanical properties of a textile fibers are highly important, contributing both to the behavior of fibers in processing and to the properties of the final product. These fiber properties combine to determine the potential performance of the fiber during yarn manufacturing and fabric formation. Fiber modulus is one property that is beleived to contribute largely to resisting the forces of spinning and weaving, thus providing a potential for significant improvements in processing performance. This thesis was undertaken to determine the effects of polyester fiber modulus on processing performance and yarn quality. High and low modulus polyester fibers at various deniers were spun into ring spun and open end yarns. Two different yarn blends, a 100% polyester and a 50/50 PIC, were spun into a 30/1 Ne. Various test were performed to determine processing performance. Once spun, numerous yarn test were run on each condition to determine yarn quality. Potential weavability was performed on the Ruti Webtester. In-process test concluded that low modulus fibers required less friction to pull the fibers apart according to the Rotor Ring cohesion test. The results of yarn testing indicated that high modulus fibers increased ring spun yarn strength. Also, yarns produced from low modulus fibers increased major defects, ring spun classimat minor defects, and open end yarn hairiness. Finally, open end high modulus yarns performed significantly better than open end low modulus yarns on the Ruti Webtester. The Webtester is an indicator of potential weavability because it simulates the forces of weaving.