Effect of Twist, Core-Sheath Parameters and Post-dyeing Treatment on Characteristics of Nylon-Viscose Core-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:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">The effect of sheath fibre denier, twist and dyeing treatment on the characteristics of core-spun yarns having a mono and multi-filament nylon core was studied. Yarn strength and breaking extension decreased with increase in core filament denier, but were higher for yarns spun with finer denier sheath fibres. Yarns dyed with a direct dye showed a greater loss in strength and extension than the yarns dyed with a reactive dye. Core-spun yarns with multifilament core exhibited a smaller diameter, which increased after dyeing.</span>