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Asymmetric Surface Roughness Formationon Moving Non-isothermal Liquid Coatings

  • M. Yamamura , T. Uchinomiya , Y. Mawatari and H. Kage
Published/Copyright: March 26, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 22 Issue 1

Abstract

We present a lubrication model of thermo-capillary flows in moving volatile liquid film coatings. The forced air impingement from a slit nozzle onto the moving coating imposes an axi-symmetric surface temperature distribution, and thus the local surface-tension gradients on the liquid surface. Despite the symmetric temperature profile, local thickness variations became asymmetric and exhibited a particular ridge in downstream and a depression in upstream. The competing feature between the surface-tension-driven and the pressure-driven flows gives a characteristic growth and decay in the surface roughness as the temperature profile travels in the opposite direction to the moving coating. The model prediction showed that the surface roughness was first enhanced and then suppressed with increasing the impinging air velocity, suggesting some directions for achieving more uniform coatings at higher speeds.

∗ Mail address: M. Yamamura, Department of Applied Chemistry, Kyushu Institute of Technology, Sensui 1-1, Tobata, Kitakyushu, Fukuoka 804-8550, Japan. E-mail:

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Received: 2006-5-7
Accepted: 2006-10-10
Published Online: 2013-03-26
Published in Print: 2007-03-01

© 2007, Carl Hanser Verlag, Munich

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  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
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  13. Review Article
  14. Welding of Plastics: Fundamentals and New Developments
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  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
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https://doi.org/10.3139/217.0062

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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