Tubing Extrusion of a Fluoropolymer Melt

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ID: 272369
2012
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Abstract
The tubing extrusion-forming process of a fluoropolymer (FEP) melt was studied both experimentally and numerically. The flow behaviour of a FEP resin was determined by using a tubular die used in industrial-scale operations and these data were compared with simulation results using (i) a viscous model (Cross) and (ii) a viscoelastic one (the Kaye–Bernstein, Kearsley, Zapas / Papanastasiou, Scriven, Macosko or K-BKZ/PSM model) in order to assess the viscoelastic effects. In all simulations, compressibility, thermal and pressure effects on viscosity were taken into account. It was found that the viscoelastic results for the pressure, and hence the stresses at the wall, were always higher than the viscous results. Both were higher than the experimental results. A quadratic slip model plus viscoelasticity was found necessary to reproduce the experiments. The smooth flow curves resulting from this industrial tubular-coating die are a further manifestation that this is an appropriate design for coating fluoropolymers at very high apparent shear rates, exceeding 5000 s−1.
Reference Key
hatzikiriakos2012internationaltubing Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors E. Mitsoulis,S. G. Hatzikiriakos;E. Mitsoulis;S. G. Hatzikiriakos;
Journal International Polymer Processing
Year 2012
DOI
10.3139/217.2534
URL
https://sciprofiles.com/publication/view/dcfe3ccd2b18b0a940b9e530db6bd0f6
Keywords
model flow extrusion coating die melt tubular fluoropolymer tubing fep

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