الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
This study was carried out to examine the possibility of spinning commercially grown Egyptian Long-Staple cottons for open-end rotor spinning machine into yarn counts finer than the ones regularly spun on these machines using two types of Upland cottons” Greek and Sudanese cottons”, which could help in increasing demand on Long staple Egyptian cottons, besides helping cotton breeder in Cotton Research Institute in breeding new varieties more appropriate to open-end rotor spinning. The long staple Egyptian cotton varieties Giza 95, Giza 90, Greek and Sudanese Upland cottons were spun into 24’s, 30’s, 36’s and 40’s yarn counts at constant twist multiplier, 4.7.Yarn quality parameters were determined on long staple Egyptian commercial cotton varieties namely; Giza 90 and Giza 95, in addition two Upland cotton (obtained from Greek and Sudanese) exhibiting three levels of fiber strength and fiber length were used in this study. Fiber data given in showed that the Upland cotton were of lower strength and length than all the Egyptian cotton varieties.