Fiber spinning draw resonance

Table 13.3 Draw-resonance ratio measured under specific experimental conditions0 for the three polymers shown in Table 13.1 [13]. From Some effects of the rheological properties of PET on spinning line profile and structure developed in high-speed spinning , Perez, G., in High-Speed Fiber Spinning, Ziabicki, A. and Kawai, H. (Eds), 1985, pp. 333-362, copyright (1985 John Wiley Sons, Inc.). Reprinted by permission of John Wiley Sons, Inc.

FIGURE 3.18 Diameter fluctuations for polypropylene fibers during spinning random fluctuation and draw resonance. (From Minoshima, W. White, J.L. Spruiell, J.E. J. Appl. Polym. Sci., 1980, 25, 287. With permission.)... 

Draw resonance occurs in processes where the extrudate is exposed to a free surface stretching flow, such as blown film extrusion, fiber spinning, and blow molding. It manifests itself in a regular cyclic variation of the dimensions of the extrudate. An extensive review [169] and an analysis [170] of draw resonance were done by Petrie and Denn. Draw resonance occurs above a certain critical draw ratio while the polymer is still in the molten state when it is taken up and rapidly quenched after take-up. 

Draw resonance is an undesirable behavior of polymer fluids, which affects the stability of polymer processing. Avoiding draw resonance or draw resonance-induced spin breaks is essential in producing continuous fibers having uniform thickness and properties. 

B.9 Draw Resonance in Coextrusion Fiber Spinning. Coextrusion fiber spinning is an industrial process used for the production of plastic optical fibers. Based... 

Lee, W. S. and C.-W. Park. 1992. Draw Resonance Instability in Coextrusion Fiber Spinning. 50th SPE Annual Technical Conference, Detroit, MI, 38, 2181-2183. 

---