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Novel Extrusion Dies with Rotating Rollers for CO2-Plastic Foam Production

  • H. Benkreira , M. Gale , R. Patel , M. Cox and J. Paragreen
Published/Copyright: May 2, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 19 Issue 2

Abstract

This paper describes a new roller die design capable of generating high pressures to allow the direct injection of liquid carbon dioxide into polymer melts and produce low density foams. The novelty of the design lies in the counter-flow action of a pair of rotating rollers separated by a gap to build up pressure. A mathematical model of the flow in the extrusion-roller die system is described and tested against experimental data with PS, LDPE and PP under a wide range of roller speeds and gaps. The study shows that this new design is feasible but more comprehensive CFD simulations and experiments are required to optimise design and operation to obtain the low-density polymer foams sought.

∗ Mail address: H. Benkreira, Dept. of Chem. Eng., University of Bradford, West Yorkshire BD7 1DP, UK E-mail:

References

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Received: 2004-1-22
Accepted: 2004-1-22
Published Online: 2013-05-02
Published in Print: 2004-05-01

© 2004, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. DuPont, IG Farbenindustrie, ICI and Japanese PA Fiber Manufacturers Polyamides 66 and 6
  5. Screw Extrusion
  6. Modeling the Flow in the Metering Zone of Single Screw Extruders Using a Helical Geometry Model
  7. Engineering Analysis of Devolatilization of Various Additives in Intermeshing Co-rotating Twin Screw Extruders
  8. Die Extrusion
  9. Novel Extrusion Dies with Rotating Rollers for CO2-Plastic Foam Production
  10. Experimental Investigation of the Development of Interfacial Instabilities in Two Layer Coextrusion Dies
  11. Detachment of the Polymer Melt from the Roll Surface: Calendering Analysis and Data from a Shear Roll Extruder
  12. Reactive Extrusion
  13. Reactive Extrusion of SAN/EPDM Blends
  14. Film
  15. Easy Tear Film of Biaxially Oriented PA 6/MXD 6 Blend by Double Bubble Tubular Film Process
  16. Deformation Behavior, Processability and Physical Properties for Biaxially Oriented Film of LLDPE
  17. Stretchability and Properties of LLDPE Blends for Biaxially Oriented Film
  18. Stretchability and Properties of Various LLDPE for Biaxially Oriented Film
  19. Molding
  20. Microinjection Molding with LIGA-Like Process
  21. Thermoforming
  22. On the Use of the Heating Stage to Control the Thickness Distribution in Thermoformed Parts
  23. PPS News
  24. PPS News
https://doi.org/10.3139/217.1818

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. DuPont, IG Farbenindustrie, ICI and Japanese PA Fiber Manufacturers Polyamides 66 and 6
  5. Screw Extrusion
  6. Modeling the Flow in the Metering Zone of Single Screw Extruders Using a Helical Geometry Model
  7. Engineering Analysis of Devolatilization of Various Additives in Intermeshing Co-rotating Twin Screw Extruders
  8. Die Extrusion
  9. Novel Extrusion Dies with Rotating Rollers for CO2-Plastic Foam Production
  10. Experimental Investigation of the Development of Interfacial Instabilities in Two Layer Coextrusion Dies
  11. Detachment of the Polymer Melt from the Roll Surface: Calendering Analysis and Data from a Shear Roll Extruder
  12. Reactive Extrusion
  13. Reactive Extrusion of SAN/EPDM Blends
  14. Film
  15. Easy Tear Film of Biaxially Oriented PA 6/MXD 6 Blend by Double Bubble Tubular Film Process
  16. Deformation Behavior, Processability and Physical Properties for Biaxially Oriented Film of LLDPE
  17. Stretchability and Properties of LLDPE Blends for Biaxially Oriented Film
  18. Stretchability and Properties of Various LLDPE for Biaxially Oriented Film
  19. Molding
  20. Microinjection Molding with LIGA-Like Process
  21. Thermoforming
  22. On the Use of the Heating Stage to Control the Thickness Distribution in Thermoformed Parts
  23. PPS News
  24. PPS News
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