Thesis Details

Thesis Title: An Evaluation of Short, High-Temperature Heating Equipment for Commercial False-Twist Texturing of Polyester
Thesis Author: Anthony Dotson
Abstract: Many technological advances in the past have led to the current success of the false-twist texturing process. Recent advances have been limited but the introduction of heating technology, new to the texturing industry, may offer advantages over the conventional contact heating equipment. In addition to reducing the size of the machine, the short, high-temperature heater may increase threadline stability, which could allow higher texturing speeds. The manufacturers of these heaters have claimed improved yarn quality, energy savings, and an increased heater cleaning cycle in addition to the improved process speeds. Twenty-four conditions were used to texture polyester and determine the effects denier, disc space setting, speed, and heating method have on yarn properties. Twelve of the twenty-four conditions, which excluded the effects of different disc space settings, were used to determine the effects on the energy consumed by the heater. Eight conditions were used to determine the effects denier, disc space setting, and heating method have on the maximum processing speeds. And finally, fifty-four conditions· were used to determine the effects heating method has on the cleaning cycle of the heater. Many differences in individual yarn properties were found as a result of the different heating methods; however, the overall yarn characteristics were comparable. Yarn textured to 70 denier benefitted in energy consumption and maximum texturing speeds using the short, high-temperature heater, while yarn textured to 150 denier required more energy and gained no improvement in speeds. The cleaning cycle of both heaters extended beyond the period of time investigated; however, positional dye variability was found to be reduced using the short, high-temperature heater.