A comparative study of hair trapping by a short grooved surface during conventional and siro-spinning

Abstract

In this study, theoretical analysis was conducted for hair trapping by a short grooved surface contacting in different distances during conventional and siro-spinning, respectively. Then, blended cotton/ramie conventional and siro yarns were produced without and with the short grooved surface at different position distances. Hairs longer than 3 mm decreased as the surface position distance increased for both conventional and siro spun yarns, reducing short hairs by binding them onto the yarn stem. Conventional yarn hairiness H values decreased gradually as the surface position distance increased; however, siro spun yarn hairiness H values were similar without a gradual decrease as the surface position distance increased. The hair wrapping caused reduction of thin places, and occasional increase of thick places and neps for both conventional and siro yarns spun with the surface, respectively. Unevenness CVm results showed no serious deterioration after applying the surface during conventional and siro-spinning, and even some improved. The experimental results corresponded well to our theoretical analysis.