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Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock

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Published/Copyright: September 9, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 28 Issue 3

Numerical simulations of co-extruded multilayered viscoelastic polymers flowing through a feed block were performed to analyze the effects of polymer rheology and process conditions on the distortion of interfaces between layers. Finite element simulations assuming Phan-Thien Tanner viscoelastic fluids were used to test the effects of increasing the number of layers introduced to the feed block and decreasing wall friction on interface distortion. It was found that increasing the number of layers introduced to the feed block decreased the overall distortion in the layers by reducing the overall magnitude of second normal stress differences and thus decreasing the normal in-plane velocities that cause distortion, which was validated by experiments. Decreasing wall friction was also found to decrease the amount of distortion in layer interfaces by decreasing the strength of these second normal stress differences.

3 Mail address: Roger T. Bonnecaze, Dept. of Chemical Engineering, The University of Texas at Austin, Austin TX, USA, E-mail:

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Received: 2012-10-31
Accepted: 2012-10-31
Published Online: 2013-09-09
Published in Print: 2013-07-01

© 2013, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Climatic Ageing of Components of Polymer Based Electrochromic Devices
  5. Previous Experimental Polymer Rheology Versus Flow Induced Crystallization
  6. Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders
  7. Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock
  8. Preparation and Characterization of PES and PA Composite Membranes for Air Separation at Low Pressures
  9. Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness
  10. Irradiation Strategy for Laser Transmission Welding of Thermoplastics Using High Brilliance Laser Source
  11. Polytetrafluoroethylene Paste Extrusion: A Fibrillation Model and Its Relation to Mechanical Properties
  12. Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”
  13. Application of the Network Simulation Method to Flat Dies with Inverted Prelands
  14. In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
  15. Rapid Communications
  16. Accurate Bio-scaling Processing of Micro Structured Shark Skin Based on Swelling of Polydimethylsiloxane
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
https://doi.org/10.3139/217.2725

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Climatic Ageing of Components of Polymer Based Electrochromic Devices
  5. Previous Experimental Polymer Rheology Versus Flow Induced Crystallization
  6. Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders
  7. Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock
  8. Preparation and Characterization of PES and PA Composite Membranes for Air Separation at Low Pressures
  9. Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness
  10. Irradiation Strategy for Laser Transmission Welding of Thermoplastics Using High Brilliance Laser Source
  11. Polytetrafluoroethylene Paste Extrusion: A Fibrillation Model and Its Relation to Mechanical Properties
  12. Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”
  13. Application of the Network Simulation Method to Flat Dies with Inverted Prelands
  14. In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
  15. Rapid Communications
  16. Accurate Bio-scaling Processing of Micro Structured Shark Skin Based on Swelling of Polydimethylsiloxane
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
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