EFFECT OF ELEVATED TEMPERATURE AND EXPOSURE PERIOD TO HEAT ON FIBER AND YARN PROPERTIES OF EGYPTIAN COTTON | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 17, Volume 73, Issue 1, March 1995, Page 193-203 PDF (2.76 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1995.433205 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| AHMED E. M. YOUSEF; MAHER T. RAGAB | ||||
| Cotton Research Institute, Agricultural Research Centre, Giza, Egypt | ||||
| Abstract | ||||
| Two Egyptian cotton varieties, Giza 75 and Giza 76 were used in the present study. From each, two lint cotton grades; Fully Good Fair (FGF) and Good/Fully Good (G/FG) were used to provide two distinctly different levels of fiber maturity. The lint cotton samples were subjected to the temperatures of 20°C (unheated), 80°C, 140°C and 200°C for 20 minutes. Further, the samples were exposed to the highest temperature of 200°C for 5, 10 and 20 minutes. The results obtained indicated that there was a consistent pattern of increase in the degree of Yellowness (+b) with the elevation of heating temperature and with the increase of exposure period to heat. On the other hand, heat treatments brought about a slight reduction in fiber length and more obvious reductions in strength and elongation of fibers and yarns. As for chemical properties, wax content decreased whereas reducing sugars content tended to increase with elevating heat and prolonging exposure period. The two lint cotton grades of the two studied varieties responded almost similary to heat treatments with regard to all properties considered in this study except reducing sugars content which increased more obviously in the higher grade G/FG than in the lower grade FGF. | ||||
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