Effect of Twist on Mechanical Properties of Twisted Textured Polyester Yarn

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:="" calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:timesnewromanpsmt;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">The effect of twist on the mechanical properties of twisted textured polyester yarns was studied. 80 denier textured polyester yarns were twisted with various tex twist factor (Tex^1/2 turns/cm) from 9 to 108. With increase in twist, the yarn tenacity first increased and then gradually decreased, the elongation at break increased up to a twist factor of 72 and then remained nearly constant, the work of rupture first increased sharply and then decreased sharply, and the yarn diameter decreased sharply up to a twist factor of 27 and then remained constant.</span>