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Production of Fine Count Yarns from Some Extra-long Egyptian Cottons on Different Spinning Systems

Eman Rashwan El-Sayed, Eman Yehia Abd-Elkawe

Abstract: The current research was carried out to produce fine count yarns from extra-long Egyptian cotton varieties using compact and ring spinning systems.in addition, to compare between compact yarns and ring yarns in terms of their physical and mechanical properties. Three commercial extra-long staple Egyptian cottons Giza92, Giza93 and Giza 96 were used to produce four linear densities of 80, 100, 120 and 140 at 3.6 twist multiplier. Results obtained showed that Giza 92 was surpassed significantly other extra -long staple varieties. It recorded the highest mean values of yarn strength and yarn evenness While, the same variety recorded the lowest mean values of yarn hairiness and imperfections. Compact yarns were much better than yarns spun on the ring spinning in yarn strength, yarn elongation, evenness, yarn imperfections and yarn hairiness. Yarn count 80,s gave higher single yarn strength (20.89cN/tex), yarn elongation (5.03%) and yarn evenness (17.49%) and lower yarn hairiness (2.04) and imperfections than yarn count 140s. Single yarn strength, yarn elongation and yarn evenness were decreased with increasing yarn count. While the number of neps, hairiness, the number of thin and thick places were increased with increasing yarn count. Concerning, the effect of interaction between cotton varieties × yarn counts × spinning systems on yarn quality properties. Yarn count 80s recorded the highest mean values of yarn strength (23.14, 21.1 and 20.2 cN/tex) and yarn evenness (17.72, 16.53 and 16.79%) for varieties Giza92, Giza93 and Giza96, respectively for compact spinning system. Yarn strength at count 80, 100, 120 and 140 correlated negatively and highly significant with micronaire value and maturity ratio.
Keywords: yarn count / cotton varieties / Giza93 / Giza92 / imperfections / elongation / ring spinning

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