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Keywords:

  • high-speed spinning;
  • supercooled spinning;
  • orientation-induced crystallization;
  • poly(ethylene terephthalate)

Abstract

An attempt has been made to investigate the feasibility for a novel concept of supercooled spinning to obtain orientation-induced crystallization at speeds lower than that for the high-speed spinning technology. This is achieved by setting the nozzle temperature lower than the melting point for PET, making the polymer a supercooled fluidic liquid, and then spinning the supercooled. The experimental results show that high orientation and high crystallinity can be achieved at a spinning speed of 2500 m/min, which is in good comparison with a speed of 5000–6000 m/min to obtain similar degree of orientation and crystallinity in the high-speed spinning. The properties of the as-spun fibers obtained by supercooled spinning were analyzed, and a rational theoretical account for the supercooled spinning is explored. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 3078–3082, 2006