Physical characteristics of tencel-polyester and tencel-cotton yarns produced on ring, rotor and air-jet spinning machines

230-236<span style="font-size:11.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">The physical characteristics of tencel-polyester and tencel-cotton yarns spun on ring, rotor and air-jet spinning machines in relation to blend ratio and twist factor have been studied. It is observed that amongst ring, rotor and MJS yarns, the ring yarns are stronger, less rigid and possess higher work of rupture, whereas rotor yarns are more even, have fewer imperfections and less hairy regardless of fibre-mix. Also, rotor- spun yarns have higher extensibility than ring and MJS yarns for tencel-cotton mix. Further, tencel-polyester yarns yield more satisfactory results than the tencel-cotton yarns in terms of strength, breaking extension, evenness, imperfections and work of rupture. Increasing tencel content both in tencel-polyester and tencel-cotton fibre mix makes the yarn rigid and more hairy.