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Abstract:
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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.
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