Rotor machine variables and yarnstructure: Part IV-Influence of machine variables on configuration of neps and thick places of polyester rotor 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:="" "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"="">An increase in rotor speed and opening roller speed increases the unopened and fused neps. With in- crease in rotor diameter, the unopened neps first increase and then decrease but the hand-fused fibre neps decrease. Abraded neps do not show any trend with the change in machine variables. An increase in either rotor speed or opening roller speed increases the abraded-belt neps. Loose-belt neps invariably increase with the increase in rotor speed, opening roller speed and rotor diameter. With increase in opening roller speed at a particular rotor diameter, the surface-clustered thick places increase, but with the increase in rotor diameter, the surface-clustered thick places initially increase and then decrease. Abraded thick places increase invariably with an increase in opening roller speed and rotor speed.</span>