Abstract
AbstractFiber spinning of polyethylene terephthalate (PET) was studied at take‐up speeds ranging from 2000 m/min to 7000 m/min under various spinning conditions. Effects of changes in process variables on the molecular orientation, crystallinity, and properties of as‐spun PET fibers are reported. Conventional cross‐flow quench in high‐speed spinning yields fibers with undesirable crimp and asymmetric structure with respect to the fiber axis. Radial‐flow quench eliminates these problems. Changes in other spinning conditions, such as extrusion temperature, throughput or take‐up denier, and molecular weight, may also affect the development of PET fiber structure in the high‐speed threadline.
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