Although POY wastes without spin finishes were used in the experiments, the possible degradations effects of spin finishes and other oily impurities during extrusion stage were investigated by employing DTA and DSC analysis. As shown in Figures 1 and 2, a significant difference could not be observed between the fibers with and without oil of regular counts. In order to make full statement about the effect of oil on POY wastes, micro fibers and flat yarns wastes which have higher amount of oil should be examined. The results of experiments are shown in