Abstract
The shear viscosity of polytetrafluoroethylene (PTFE) paste and its flow behavior during paste extrusion were investigated. Frequency sweeps using a parallel plate rheometer were performed on compression molded samples of PTFE paste made from fine powder PTFE mixed with ethanol as a lubricant. Various grits of sandpaper were used to reduce slip of PTFE paste on the walls. A viscosity model was generated and COMSOL Multiphysics was used to create a time-dependent flow simulation of PTFE through a paste extruder. The simulated results were compared to experimental data of actual paste extrusion. Due to simplifications used in the model, the simulated extrusion pressure over time differed in both magnitude and slope when compared to the experimental data. The simulated velocity profile was compared to flow visualization experiments, showing good agreement in wider regions of the extruder. Despite these drawbacks, the experiments and simulated model provided useful information about the flow within the paste extruder.
Original language | English |
---|---|
Title of host publication | SPE ANTEC 2020 |
Subtitle of host publication | The Annual Technical Conference for Plastic Professionals |
Publisher | Society of Plastics Engineers |
Pages | 67-73 |
Number of pages | 7 |
ISBN (Electronic) | 9781713821182 |
State | Published - 2020 |
Externally published | Yes |
Event | SPE ANTEC 2020: Annual Technical Conference for Plastic Professionals - Virtual, Online Duration: 30 03 2020 → 05 05 2020 |
Publication series
Name | Annual Technical Conference - ANTEC, Conference Proceedings |
---|---|
Volume | 1 |
Conference
Conference | SPE ANTEC 2020: Annual Technical Conference for Plastic Professionals |
---|---|
City | Virtual, Online |
Period | 30/03/20 → 05/05/20 |
Bibliographical note
Publisher Copyright:© 2020 Society of Plastics Engineers. All rights reserved.