Influence of draw-off nozzle type on characteristics of polyester-viscose rotor-spun yarns

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:calibri;mso-bidi-theme-font:minor-latin;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">The effects of yarn twist, yarn composition and draw-off nozzles (notched and spiral) on the properties of polyester-viscose rotor-spun yarns have been studied. It is observed that the surface characteristics of the draw-off nozzle have greater influence on the polyester fibre yarns than on viscose fibre yarns. Yarns spun from 100% polyester fibre or its blend with viscose rayon exhibit considerably higher tenacity, breaking extension, unevenness and imperfections than the viscose fibre yarns. Notched draw-off nozzle produces stronger, more extensible and more even yarns. The improvement, however, depends upon the yarn composition and tex twist factor.</span>