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Analysis of Necking Deformation Behavior in High-Speed In-line Drawing Process of PET by On-line Diameter and Velocity Measurements

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Published/Copyright: May 10, 2022
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International Polymer Processing
From the journal International Polymer Processing Volume 21 Issue 5

Abstract

To clarify the characteristic behavior of filament deformation in high-speed in-line drawing process of poly(ethylene terephthalate) (PET), on-line measurements of filament velocity and diameter were performed. In the process, velocity of the first godet roller was fixed at 2 km/min and the draw ratio was varied from 1.75 to 2.25 by changing the velocity of the second godet roller from 3.5 to 4.5 km/min. For comparison, on-line measurements were also performed for the high-speed melt spinning process at take-up velocities of 2 to 5 km/min. Diameter and velocity profiles of PET filament in the high-speed in-line drawing process indicated that the filament started to deform immediately after passing through the first godet roller (GR-1), and finished its deformation at 40 ~ 60 cm from the GR-1. The region of deformation became narrower and shifted toward the GR-1 with an increase in the draw ratio. Detailed analysis of necking deformation through simultaneous diameter measurements at two positions of close distance revealed that the position of necking deformation fluctuates along the drawing-line and its shape varies significantly depending on the direction of its movement. When the position of necking deformation was shifting toward the upstream, its shape was steeper than the one shifting toward the downstream. Results of the simultaneous on-line measurements of diameter and velocity supported this conclusion qualitatively. The analyzed maximum strain rate at the draw ratio of 2.0 reached a high value of 510 s– 1.

T. Kikutani, Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-S8-32, O-okayama, Meguro-ku, Tokyo 152-8552, Japan

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Received: 2006-05-06
Accepted: 2006-07-25
Published Online: 2022-05-10

© 2006 Hanser Publishers, Munich

Articles in the same Issue

  1. Contents
  2. Rapid Communications
  3. A Novel High Flow Rate Pin for Water-assisted Injection Molding of Plastic Parts with a More Uniform Residual Wall Thickness Distribution
  4. Regular Contributed Articles
  5. Structure Property Relationships in PA 6 and PP Copolymers Blended by Single and Twin Screw Extrusion
  6. Stretchability and Properties of Biaxially Oriented Polypropylene Film
  7. Dynamic Mold Surface Temperature Control Using Induction and Heater Heating Combined with Coolant Cooling
  8. Visualization of Melt-Flow Behavior Inside the Runner in Ultra High Speed Injection Molding
  9. Effects of Cavity Conditions on Transcription Molding of Microscale Prism Patterns Using Ultra-High-Speed Injection Molding
  10. Effect of Melt and Mold Temperature on Fiber Orientation during Flow in Injection Molding of Reinforced Plastics
  11. Invited Paper
  12. Polymer/Layered Silicate Nano-composites
  13. Regular Contributed Articles
  14. Paste Extrusion of Polytetrafluoroethylene: Temperature, Blending and Processing Aid Effects
  15. Influence of Viscosity-interface Modifier Interactions on Performance and Processability of Rice Hull PE Composites
  16. Single and Multi Objective Optimization for Injection Molding Using Numerical Simulation with Surrogate Models and Genetic Algorithms
  17. A Process Classification Number for the Solidification of Crystallizing Materials
  18. Effect of Aerodynamics on Film Blowing Process
  19. Analysis of Necking Deformation Behavior in High-Speed In-line Drawing Process of PET by On-line Diameter and Velocity Measurements
  20. PPS News
  21. PPS News
  22. Seikei-Kakou Abstracts
  23. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.0980

Articles in the same Issue

  1. Contents
  2. Rapid Communications
  3. A Novel High Flow Rate Pin for Water-assisted Injection Molding of Plastic Parts with a More Uniform Residual Wall Thickness Distribution
  4. Regular Contributed Articles
  5. Structure Property Relationships in PA 6 and PP Copolymers Blended by Single and Twin Screw Extrusion
  6. Stretchability and Properties of Biaxially Oriented Polypropylene Film
  7. Dynamic Mold Surface Temperature Control Using Induction and Heater Heating Combined with Coolant Cooling
  8. Visualization of Melt-Flow Behavior Inside the Runner in Ultra High Speed Injection Molding
  9. Effects of Cavity Conditions on Transcription Molding of Microscale Prism Patterns Using Ultra-High-Speed Injection Molding
  10. Effect of Melt and Mold Temperature on Fiber Orientation during Flow in Injection Molding of Reinforced Plastics
  11. Invited Paper
  12. Polymer/Layered Silicate Nano-composites
  13. Regular Contributed Articles
  14. Paste Extrusion of Polytetrafluoroethylene: Temperature, Blending and Processing Aid Effects
  15. Influence of Viscosity-interface Modifier Interactions on Performance and Processability of Rice Hull PE Composites
  16. Single and Multi Objective Optimization for Injection Molding Using Numerical Simulation with Surrogate Models and Genetic Algorithms
  17. A Process Classification Number for the Solidification of Crystallizing Materials
  18. Effect of Aerodynamics on Film Blowing Process
  19. Analysis of Necking Deformation Behavior in High-Speed In-line Drawing Process of PET by On-line Diameter and Velocity Measurements
  20. PPS News
  21. PPS News
  22. Seikei-Kakou Abstracts
  23. Seikei-Kakou Abstracts
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