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Computer Simulation of Multi filament Air Jet Melt Spinning

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Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 4 Issue 2

Abstract

Air jet melt spinning for multifilament system was studied both theoretically and experimentally. Basic equations describing the multifilament system of air jet melt spinning were derived by considering air temperature and velocity of cooling flow surrounding the individual spinlines. Numerical computations of the fundamental equations for air jet melt spinning were carried out for various spinning conditions. Steady-state solutions obtained give the spinline cross sectional area, spinline temperature, spinning tension and spinline velocity. These are described as a function of the distance measured downward from the spinneret. Air jet melt spinning experiments were conducted for poly-(ethyleneterephthalate) (PET) having an intrinsic viscosity of 0.61. The spinning variables were changed mainly in terms of throughput, distance from spinneret point to ejector and air pressure in the ejector. Good correlations between theory and experiment were obtained for the final spinline speed or as-spun fiber denier. Further, the molecular orientation of asspun fiber can be estimated using the computed stretching speed at the ejector point. It was found that the simulation program of multifilament air jet spinning is very useful in finding the appropriate spinning conditions for the industrial spinning process and in estimating fiber properties.

* Mail address: Dr. H. Ishihara, Katata Research Center, Toyobo Company, Ltd., 2-1-1 Katata Otsu, Shiga, 520-02, Japan.
Published Online: 2013-05-27
Published in Print: 1989-05-01

© 1989, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Review Paper
  4. New Developments in Fiber- and Filmextrusion
  5. Original Contributions
  6. Use of Chilled Die Lips to Improve Production Rates in Extrusion of PE
  7. Characterization of the Sharkskin Defect and its Development with the Flow Conditions**
  8. Modifying Threadline Dynamics in the High-speed Melt Spinning Process
  9. Computer Simulation of Multi filament Air Jet Melt Spinning
  10. Structure Development in the Melt Spinning and Drawing of Poly p Phenylene Sulfide Fibers
  11. Cast Film Extrusion of Polypropylene Films
  12. Air Ring Effect on Blown Film Dynamics
  13. Computer Simulation of Melt Viscoelasticity Functions for Binary Polyblends
https://doi.org/10.3139/217.890091

Articles in the same Issue

  1. Contents
  2. Contents
  3. Review Paper
  4. New Developments in Fiber- and Filmextrusion
  5. Original Contributions
  6. Use of Chilled Die Lips to Improve Production Rates in Extrusion of PE
  7. Characterization of the Sharkskin Defect and its Development with the Flow Conditions**
  8. Modifying Threadline Dynamics in the High-speed Melt Spinning Process
  9. Computer Simulation of Multi filament Air Jet Melt Spinning
  10. Structure Development in the Melt Spinning and Drawing of Poly p Phenylene Sulfide Fibers
  11. Cast Film Extrusion of Polypropylene Films
  12. Air Ring Effect on Blown Film Dynamics
  13. Computer Simulation of Melt Viscoelasticity Functions for Binary Polyblends
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