Fibre Distribution and Packing in Eli-Twist, SIRO and Ring Spun TFO Yarn

In a staple yarn, the composition, distribution and arrangement of fibres can influence its properties. Arrangement and distribution of fibres in a yarn being spinning system dependent, any change in the system causes variation in product performance. Here, an attempt has been made to investigate the fibre distribution in Eli-Twist yarn and it comparison with that of ring spun TFO and SIRO yarn. Yarns of three compositions from cotton and polyester were produced on Eli-Twist, TFO and SIRO spinning systems. Three different counts (39.4, 29.5 and 23.6 tex) from each composition were produced maintaining 40 twist factor for each. Fibre distribution, yarn cross-section, average packing density and number of fibre in yarn cross-section in Eli-Twist yarn were measured and compared with conventional ring spun TFO and SIRO yarn. Migration index helped in identifying the location of fibre in blended yarn. In the polyester–cotton yarn, polyester had a preferential tendency to predominate near the core. Average packing density in Eli-Twist yarn was found to be higher than that of ring spun TFO and SIRO yarn.