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Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics

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Published/Copyright: June 5, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 17 Issue 2

Abstract

The mechanical properties of hybrid (commingled) yarn based reinforced thermoplastics depend on many parameters of the fiber components as well as of the different technological conditions during the commingling and the hot press molding. Among the fiber parameters the diameter ratio of the matrix and the reinforcing yarn components are most important to obtain best mechanical properties of the reinforced thermoplastics. The paper treats theoretical considerations in order to reach a high probability of coating each reinforcing filament with the thermoplastic material during the hot press molding. The calculations include the filament ratios and the achieved volume ratios of both hybrid yarn components of the finished reinforced thermoplastics. It is demonstrated that under different optimization criterias (same filament numbers for both components or the same surfaces of the reinforcing yarn filaments and the matrix yarn filaments before the hot press molding) a more or less small range of filament ratios seem to be valid for manufacturing a homogeneous faultless reinforced thermoplastic. Quantitative calculations for two hybrid yarn systems PEEK/carbon fibers and PP/glass fibers, presented in diagrams, are demonstrated. Technological conditions for the spinning of micro fibers like PEEK-filaments complete the presentation.

* Mail address: R. Beyreuther, Institute of Polymer Research Dresden, PO Box 120411, D-01005 Dresden, Germany
Received: 2002-2-12
Accepted: 2002-2-13
Published Online: 2013-06-05
Published in Print: 2002-05-01

© 2002, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Thirteenth of a Series: The First and Best Industrial Polymer Rheologist — Melvin Mooney (1893–1968)
  3. Single Extrusion
  4. A New Method for Simulating the Conveying of Solid Pellets
  5. A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder
  6. Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage
  7. Computational Study of the Velocity Field in the Conveying Element of a Ko-kneader with CFD Method
  8. Reactive Extrusion
  9. Modification of Polyolefin with Maleic Anhydride/Styrene and Methyl Methacrylate/Styrene
  10. Fibers and Films
  11. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation
  12. Injection Molding
  13. Evaluation of a Model Describing the Advancing Flow Front in Injection Moulding
  14. Process Design for Reducing the Warpage in Thin-walled Injection Molding
  15. Composites
  16. Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics
  17. Squeeze Flow Rheology of Glass Mat Thermoplastic (GMT) in Large Tools and at High Closing Velocities
  18. Analysis of Heat Flu from Molten Polymers to Molds in Injection Molding Processes
https://doi.org/10.3139/217.1681

Articles in the same Issue

  1. Editorial
  2. Thirteenth of a Series: The First and Best Industrial Polymer Rheologist — Melvin Mooney (1893–1968)
  3. Single Extrusion
  4. A New Method for Simulating the Conveying of Solid Pellets
  5. A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder
  6. Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage
  7. Computational Study of the Velocity Field in the Conveying Element of a Ko-kneader with CFD Method
  8. Reactive Extrusion
  9. Modification of Polyolefin with Maleic Anhydride/Styrene and Methyl Methacrylate/Styrene
  10. Fibers and Films
  11. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation
  12. Injection Molding
  13. Evaluation of a Model Describing the Advancing Flow Front in Injection Moulding
  14. Process Design for Reducing the Warpage in Thin-walled Injection Molding
  15. Composites
  16. Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics
  17. Squeeze Flow Rheology of Glass Mat Thermoplastic (GMT) in Large Tools and at High Closing Velocities
  18. Analysis of Heat Flu from Molten Polymers to Molds in Injection Molding Processes
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