Effect of Fiber Length and Short Fiber Percent in Cotton on Fiber and Yarn Quality

Ibrahim A.E. Ibrahim

This study was carried out at Plant Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Egypt, during 2016 season to investigate the effect of fiber length and short fiber percent on fiber and yarn quality. In this work three cotton varieties namely: (Giza 88, Giza 86 and Giza 85) to represent the three categories of fiber length i.e., (34.37, 32.16 and 30.12 mm) and three lint cotton grades from each cotton variety i.e., G/FG, G and FGF/G represent three categories of short fiber content (4.50, 5.30 and 6.60 %). The studied treatments were arranged in completely randomized design (C.R.D.) with three replications.

The obtained results showed that the longest fibers (34.37 mm) significantly surpassed the others under study and gave the highest mean values of fiber bundle strength (g/tex), fiber stiffness, fiber toughness (g/tex), single yarn strength (cN/tex) and lea product and the lowest mean values for single yarn elongation (%), yarn C.V. (%), yarn unevenness (%) and hairiness. The lowest short fiber content (4.50 %) recorded the highest mean values for length uniformity (%), fiber bundle strength (g/tex), fiber elongation (%), fiber toughness (g/tex), single yarn strength (cN/tex), lea product, single yarn elongation (%) and the lowest mean values for yarn C.V. (%), yarn unevenness (%) and hairiness.

In conclusion, to obtain the best quality of both fibers and yarns the longest cotton fibers with the lowest short fiber content should be used.

Key words: Cotton, Fiber length, Yarn, quality, Hairiness and Unevenness.