EFFECT OF BLENDING TREATMENTS BETWEEN UPLAND COTTON (Gossypium hirsutum L.) AND GIZA 95 CULTIVAR (Gossypium barbadense L.) ON FIBER AND YARN QUALITY

The present study was carried out during 2018 season in the Misr Helwan Spinning and Weaving Company, Helwan, Cairo, and the laboratory of Cotton Technology Research Division, Cotton Research Institute, Agricultural Research Center, Giza, Egypt to study the effect of five cotton materials, i.e. pure Egyptian cotton (Gossypium barbadense L.) of Giza 95, pure upland cotton (Gossypium hirsutum L.), blend of 65% Giza 95 + 35% upland cotton, blend of 50% Giza 95 + 50% upland cotton and blend of 35% Giza 95 + 65% upland cotton and three yarn counts, i.e. 20’s, 25’s and 30’s on fiber and yarn technological properties significantly using the rotor open-end spinning system. Pure Egyptian cotton Giza 95 recorded the highest mean values for upper half mean length (mm), fiber uniformity (%), fiber strength (g/tex), maturity, maturity ratio (%), reflectance degree, yarn strength, it gave the lowest mean values of short fiber index, No. of neps/100m, No. of thin places/100m, No. of thick places/100m. On the other hand, upland cotton recorded the highest value of short fiber index, fiber elongation and micronaire value and lowest mean values of maturity ratio, reflectance degree (RD%),Yellow-ness(b + ). Increasing yarn counts from 20’s and 25’s to 30’s caused significant increase in mean values of some studied traits. In contrast, for the rest traits it decreased. The yarns produced at yarn count of 30’s significantly recorded the maximum mean values of evenness (C.V %), No. of neps/100 m, No. of thin places/100m and No. of thick places/100m while gave the lowest mean values of yarn strength and hairiness. Meanwhile, the maximum mean values of yarn strength and hairiness, as well as, the lowest mean values of evenness/100m, No. of neps/100m, No. of thin places/100m and No. of thick places/100m were obtained from yarn count of 20’s. The interaction between five cotton materials and three yarns obtained was significant for all yarn quality characters.