This paper attempts to quantitatively predict the occurrence of draw resonance in water-bath quenched melt-spinning of PET under non-isothermal conditions.
An empirical criterion of stability was introduced and tested against experimental spinning results and against previous simulation results by the authors.
It was found that:
(1) When newly defined nondimensional logarithmic elongation-rate (γ) is larger than about 3, spinning becomes unstable to develop draw resonance.
(2) In the case of small Stanton number, onset of draw resonance was found to be predicted by simply using the above criterion on steady state solution of governing equations. The present prediction was in close agreement with theoretical and experimental results by previous workers.
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