Distribution of Fibres in Cross-section of Rotor- and Ring-spun Yarns and Their Strength

The nature of fibre migration, the number of fibres in yarn cross-section and the factors that influence the strength of rotorand ring-spun yarns have been studied. Rotor yarn comprised 15%less fibres in yarn cross-section than the corresponding ring yarn. Fewer fibres in ~arn cross-section in rotor yarn result in lesser yarn strength. Low values of stress-strain show up the limitation in the spinning of fine counts on a rotor-spinning machine.