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Experiments and Analysis of Effect of Calender Gaps on Melting of PVC Powders in an Intermeshing Counter-rotating Twin-screw Extruder

  • D. Wang and K. Min
Published/Copyright: March 1, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 21 Issue 1

Abstract

Our ultrasound in-line monitoring studies revealed that dispersion or dissipation melting mechanism played a dominant role during melting of unplasticized polyvinyl chloride (uPVC) in an intermeshing counter-rotating twin-screw extruder. It is found that calendering effect between two screws contributes to the melting of PVC particles, and results in dispersion or dissipation melting. Thus, in this paper, a dispersed melting model in calender gaps is considered to predict polymer melting length in terms of numbers of calender gaps. Effects of screw geometries (channel depth, calender gap clearance) and processing conditions including screw speed and leakage flow on melting length are discussed for particle-filled fluid models. The calculated results are compared with experimental observations by both “screw pulling out” method and ultrasound in-line monitoring method. Ultrasound in-line monitoring provides a solution to overcome the time delay occurred in screw-pulling out method.

2∗ Mail address: K. Min, Institute of Polymer Engineering, University of Akron, Akron, OH 44325-0301, U.S.A. E-mail:

References

1 Janssen, L. P. B. M.: Twin Screw Extrusion. Elsevier, New York(1978).Search in Google Scholar

2 Covas, A., Gilbert, M., Marshall, D. E.: Plastics and Rubber Processing and Applications9, 2, p.107(1988).Search in Google Scholar

3 Henson, J. H. L., Whelan, A.: Developments in PVC Technology. John Wiley & Sons, New York(1973).Search in Google Scholar

4 Wilczynski, K., White, J. L.: Int. Polym. Process.16, p.257(2001).10.3139/217.1645Search in Google Scholar

5 Wilczynski, K., White, J. L.: Poly. Eng. Sci.43, p.1715(2003).10.1002/pen.10145Search in Google Scholar

6 Wang, D. B., Min, K.: SPE ANTEC Tech. Papers62, p.1266(2004).Search in Google Scholar

7 Wang, D. B., Min, K.: Polymer Eng. Sci.45, p.998(2005).10.1002/pen.20364Search in Google Scholar

8 Kalyon, D., Gevgilili, Shah, A.: Int. Polym. Process.19, p.129(2004).10.3139/217.1822Search in Google Scholar

9 Rauwendaal, C.: Adv. Polym. Technol.15, p.135(1996).10.1002/(SICI)1098-2329(199622)15:2<135::AID-ADV3>3.0.CO;2-WSearch in Google Scholar

10 Gogos, C. C., Tadmor, Z., Kim, M. H.: Adv. Polym. Technol.17, p.285(1998).10.1002/(SICI)1098-2329(199824)17:4<285::AID-ADV1>3.0.CO;2-NSearch in Google Scholar

Received: 2005-06-21
Accepted: 2005-12-13
Published Online: 2013-03-01
Published in Print: 2006-03-01

© 2006, Hanser Publishers, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Dedication of the Special Issue of International Polymer Processing in Honor of Prof. James Lindsay White, Editor Emeritus and Founding Editor
  5. Invited Papers
  6. Melt Compounding of Polymeric Nanocomposites
  7. Experiments and Analysis of Effect of Calender Gaps on Melting of PVC Powders in an Intermeshing Counter-rotating Twin-screw Extruder
  8. Quantitative Analysis for Polymer Degradation in the Extrusion Process
  9. Visualization of Flow Instabilities for High Density Polyethylene
  10. Heat Transfer through Metal Walls of Finite Thickness
  11. Simulation and Experimental Verification of Crystallization and Birefringence in Melt Spinning of PET
  12. Structural Development and Properties of Melt Spun Poly(butylene succinate) and Poly(butylene terephthalate-co-succinate-co-adipate) Biodegradable Fibers
  13. External Calibration in PA12 Tube Extrusion
  14. Tubular Film Extrusion Stability of Metallocene Linear Low Density Polyethylene
  15. Multilayer Barrier Film of Biaxially Oriented PA6/EVOH by Double Bubble Tubular Film Process
  16. PPS News
  17. PPS News
  18. Seikei-Kakou Abstracts
  19. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.0080

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Dedication of the Special Issue of International Polymer Processing in Honor of Prof. James Lindsay White, Editor Emeritus and Founding Editor
  5. Invited Papers
  6. Melt Compounding of Polymeric Nanocomposites
  7. Experiments and Analysis of Effect of Calender Gaps on Melting of PVC Powders in an Intermeshing Counter-rotating Twin-screw Extruder
  8. Quantitative Analysis for Polymer Degradation in the Extrusion Process
  9. Visualization of Flow Instabilities for High Density Polyethylene
  10. Heat Transfer through Metal Walls of Finite Thickness
  11. Simulation and Experimental Verification of Crystallization and Birefringence in Melt Spinning of PET
  12. Structural Development and Properties of Melt Spun Poly(butylene succinate) and Poly(butylene terephthalate-co-succinate-co-adipate) Biodegradable Fibers
  13. External Calibration in PA12 Tube Extrusion
  14. Tubular Film Extrusion Stability of Metallocene Linear Low Density Polyethylene
  15. Multilayer Barrier Film of Biaxially Oriented PA6/EVOH by Double Bubble Tubular Film Process
  16. PPS News
  17. PPS News
  18. Seikei-Kakou Abstracts
  19. Seikei-Kakou Abstracts
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