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Numerical Simulation of Extrusion Coating

Contribution to the Understanding of Adhesion Mechanisms between Grafted Polypropylene and Aluminium
  • S. Devisme , J.-M. Haudin , J.-F. Agassant , D. Rauline and F. Chopinez
Published/Copyright: March 26, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 22 Issue 1

Abstract

In packaging industry, many structures are produced by extrusion coating. In this process, a polymer film is extruded through a slit die, then stretched in air, coated on a substrate (paper, aluminium or steel foil) between a chill roll and a flexible pressure roll, and finally cooled on successive chill rolls. Due to their non-polar character, polypropylenes are not suitable for extrusion coating on metallic surfaces. Adhesive properties can be improved by grafting on the polymer chain a polar group like maleic anhydride which may react with the aluminium surface.

Our purpose was to develop a general model in order to predict the temperature field in the thickness of the multilayered structure along the stretching, laminating and cooling steps, and especially near the polymer/metal interface. This model includes crystallization kinetics and accounts carefully for the heat transfer coefficient with the successive rolls and surrounding air. Its predictions have been successfully compared to experimental temperature measurements along the coating line for various processing conditions (velocity, roll temperature, etc). Moreover, thermal history has a real impact on structure and morphology in the film. All these aspects are revealed by microscopic observations of thin microtomed sections of the film and X-ray diffraction experiments. Finally, adhesion properties of the laminate have been tested for the same process conditions. A good correlation has been established between adhesion properties and the thermal history experienced by the grafted polypropylene near the interface with aluminium before crystallization.

∗ Mail address: J.-M. Haudin, Centre de Mise en Forme des Matériaux, UMR CNRS n° 7635, Ecole des Mines de Paris, BP 207, 06904 Sophia Antipolis Cedex, France. E-mail:

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Received: 2006-4-7
Accepted: 2006-8-2
Published Online: 2013-03-26
Published in Print: 2007-03-01

© 2007, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. International Polymer Processing Special Issue: European Coating Symposium 2005, University of Bradford, UK
  5. Invited Papers
  6. Coating and Polymer Processing
  7. Practical Limitations to Carrier Layer Formation on Inclined Planes
  8. Simulation of 3D Crystallization of Colloidal Nanoparticles on a Substrate during Drying
  9. Asymmetric Surface Roughness Formationon Moving Non-isothermal Liquid Coatings
  10. Inkjet Printing of Conductive and Resistive Coatings
  11. Moisture Sorption and Transport in Polylactide
  12. 10.3139/217.0992
  13. Review Article
  14. Welding of Plastics: Fundamentals and New Developments
  15. Regular Contributed Articles
  16. Numerical Simulation of Viscous Flow in a Partially filled Co-rotating Twin Screw Extruder
  17. Invited Papers
  18. A New Calculation Model and Optimization Method for Maddock Mixers in Single Screw Plasticising Technology
  19. Regular Contributed Articles
  20. Residual Wall Thickness Distribution at the Transition and Curve Sections of Water-assisted Injection Molded Tubes
  21. Numerical Simulation of Extrusion Coating
  22. Correlation between Injection Molding Parameters, Morphology and Mechanical Properties of PPS/SEBS Blend Using Artificial Neural Networks
  23. PPS News
  24. PPS News
  25. Seikei-Kakou Abstracts
  26. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.0038

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. International Polymer Processing Special Issue: European Coating Symposium 2005, University of Bradford, UK
  5. Invited Papers
  6. Coating and Polymer Processing
  7. Practical Limitations to Carrier Layer Formation on Inclined Planes
  8. Simulation of 3D Crystallization of Colloidal Nanoparticles on a Substrate during Drying
  9. Asymmetric Surface Roughness Formationon Moving Non-isothermal Liquid Coatings
  10. Inkjet Printing of Conductive and Resistive Coatings
  11. Moisture Sorption and Transport in Polylactide
  12. 10.3139/217.0992
  13. Review Article
  14. Welding of Plastics: Fundamentals and New Developments
  15. Regular Contributed Articles
  16. Numerical Simulation of Viscous Flow in a Partially filled Co-rotating Twin Screw Extruder
  17. Invited Papers
  18. A New Calculation Model and Optimization Method for Maddock Mixers in Single Screw Plasticising Technology
  19. Regular Contributed Articles
  20. Residual Wall Thickness Distribution at the Transition and Curve Sections of Water-assisted Injection Molded Tubes
  21. Numerical Simulation of Extrusion Coating
  22. Correlation between Injection Molding Parameters, Morphology and Mechanical Properties of PPS/SEBS Blend Using Artificial Neural Networks
  23. PPS News
  24. PPS News
  25. Seikei-Kakou Abstracts
  26. Seikei-Kakou Abstracts
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