Abstract
The objective of the present study was to evaluate the impact of ginning process on the quality properties of seed cotton. The ginning process were carried out on the ginning Egyptian seed cotton (extra-long staple) Giza 86 that was mechanically picked up. The saw gin-stand machine (Lummus type) was operated at four saw drum speeds (i.e., 3.14, 3.77, 4.4, and 5.03 m/s) and four levels of feed rates (i. e., 4, 6, 8 and 10 kg.min(-1)) under four different fiber moisture content (i.e., 10.2, 8.8, 7.4 and 5.9%) to determine the effect of those parameters on the Performance of saw gin stand machine, lint quality properties and the impurities percentage. The results revealed that the fiber moisture content of 7% achieved the best lint quality properties and minimum impurities percentage. The highest ginning efficiency of 86.7% and the lowest gin stand lint losses of 0.33% associated with saw drum speed of 4.4 m/s, feed rate of 10 kg/min and lint moisture content of 8.8% d.b. Also results showed that strength was inversely proportional to the saw speed; while elongation was proportional to saw speed. The maximum value of the impurities percentage (3.6%) recorded at saw speed of 5.03 m/s, feed rate of 10 kg/min and moisture content of 10.2%.