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Slip Heating in Die Drool with Viscous Dissipation

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Published/Copyright: March 11, 2015
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International Polymer Processing
From the journal International Polymer Processing Volume 30 Issue 1

Abstract

Plastics can build-up on the die lip during extrusion. This phenomenon is called die drool and can be costly for plastics producers, requiring periodic shutdowns for die cleaning. Die drool has been attributed to the cohesive fracture of the melt into a drool layer and a bulk layer. The bulk layer slips on the drool layer after fracture, resulting in heating at the slip interface, called slip heating. The heat generated through slip heating can contribute to polymer thermal degradation, and to the die drool degradation. The impact of slip heating on die temperature rise has been investigated by neglecting viscous dissipation (Gilbert and Giacomin, 2014). This work considers viscous dissipation and its importance to slip heating. We find that viscous dissipation and slip heating contribute equally to the melt temperature rise, and we conclude with a worked example showing the importance of these two heating sources during polymer processing. We also develop two sufficient conditions for the accurate use of our results, Pé ≤ 1 and ∂Θ/∂ς ≪ ∂2Θ/∂ζ2.

* Mail address: A. Jeffrey Giacomin, Polymers Research Group, Chemical Engineering Department, Queen’s University, Kingston, ON K7L 3N6, Canada. E-mail:

References

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Gilbert, P. H., “Slip Heating in Polymer Processing”, Masters Thesis, Queen's University, Chemical Engineering Dept., Kingston, ON, Canada (2014a)Search in Google Scholar

Gilbert, P. H., Giacomin, A. J., “Slip Heating in Die Drool”, PRG Report No. 001, Queen's University, Canada (2014b)Search in Google Scholar

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Schmalzer, A. M., Giacomin, A. J., “Die Drool Theory,” J. Polym. Eng., 33, 1–18 (2013) 10.1515/polyeng-2012-0044Search in Google Scholar

Received: 2014-08-01
Accepted: 2014-11-24
Published Online: 2015-03-11
Published in Print: 2015-03-02

© 2015, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Extrusion Defects and Flow Instabilities of Molten Polymers
  5. Investigating Thermal Stability and Flame Retardant Properties of Synthesized Halloysite Nanotubes (HNT)/Ethylene Propylene Diene Monomer (EPDM) Nanocomposites
  6. Absorption Coefficient Measurement in Laser Transmission Welding of Thermoplastics
  7. Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
  8. Improving Film Die Flow Uniformity Using Optimization Methods Coupled with Finite Element Computational Fluid Dynamics (CFD) Analysis
  9. UV-Curable Technique of Magnetic Roller Soft Mold and Microstructure Pattern Replication
  10. Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
  11. Effect of Alumina Particles Embedded in Natural Rubber Foams on Cell Morphology and Thermo-Mechanical Properties
  12. Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends
  13. Measurement and Numerical Simulation of Void and Warpage in Glass Fiber Reinforced Molded Chunky Parts
  14. Experimental Study for Extrusion of Polypropylene/Wood Flour Composites
  15. A Personal Perspective on the Use of Modelling Simulation for Polymer Melt Processing
  16. Slip Heating in Die Drool with Viscous Dissipation
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
https://doi.org/10.3139/217.3002

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Extrusion Defects and Flow Instabilities of Molten Polymers
  5. Investigating Thermal Stability and Flame Retardant Properties of Synthesized Halloysite Nanotubes (HNT)/Ethylene Propylene Diene Monomer (EPDM) Nanocomposites
  6. Absorption Coefficient Measurement in Laser Transmission Welding of Thermoplastics
  7. Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
  8. Improving Film Die Flow Uniformity Using Optimization Methods Coupled with Finite Element Computational Fluid Dynamics (CFD) Analysis
  9. UV-Curable Technique of Magnetic Roller Soft Mold and Microstructure Pattern Replication
  10. Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
  11. Effect of Alumina Particles Embedded in Natural Rubber Foams on Cell Morphology and Thermo-Mechanical Properties
  12. Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends
  13. Measurement and Numerical Simulation of Void and Warpage in Glass Fiber Reinforced Molded Chunky Parts
  14. Experimental Study for Extrusion of Polypropylene/Wood Flour Composites
  15. A Personal Perspective on the Use of Modelling Simulation for Polymer Melt Processing
  16. Slip Heating in Die Drool with Viscous Dissipation
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
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