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Biaxially Oriented Polyethylene Films by Compression of Injection Moldings

Part 2. Study of the Tensile Strength
  • R. K. Bayer , F. Ania and F. J. Baltá Calleja
Published/Copyright: May 28, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 10 Issue 3

Abstract

The tensile strength, σ, of biaxially oriented polyethylene (PE) films with various degrees of biaxial stretching has been measured. The dependence of σ in the two principal directions x and y is investigated as a function of two parameters: the biaxial draw ratio (average draw ratio of the film) and the degree of biaxiality (strain distribution along the principal directions). Both parameters are related to the final applied pressure PF. The influence of initial orientation and anisometry of the injection molded precursors on the final σx and σy values along the principal directions is studied. Results are discussed in the light of the deformation mechanism which transforms the original uniaxial fiber structure of the moldings into the biaxial fibrillar structure of the final films. Direct evidence of this transformation is provided by small angle X-ray scattering (SAXS).

* Mail address: Prof. Dr. F. J. Baltá Calleja, Instituto de Estructura de la Materia, C.S.I.C., c/Serrano 119, 28006-Madrid, Spain
Received: 1994-6-22
Accepted: 1995-5-1
Published Online: 2013-05-28
Published in Print: 1995-09-01

© 1995, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Fifteenth in a Series: Ikegai Corporation: From Engine Lathes to Twin Screw Extruders
  5. Die Extrusion
  6. Analysis of Polymer Flow through Coathanger Melt Distributors
  7. Viscosity and the Formation of Die Drool at the Polymer-Metal Interfaces
  8. Flow Implications in the Processing of Tetrafluoroethylene/Hexafluoropropylene Copolymers
  9. Reactive Processing
  10. Thermal/Peroxide Induced Degradation and Maleation of Polypropylene by Reactive Extrusion
  11. Fibers and Films
  12. Biaxially Oriented Polyethylene Films by Compression of Injection Moldings
  13. Tubular Film Blowing
  14. Tubular Film Blowing
  15. Molding
  16. Elastic Calculation of Residual Stresses in Injection Molding
  17. On the Limitations of Shear Induced Crystallization in Polypropylene Melts
  18. Structure and Properties of Injection Moldings of β-Crystal Nucleator-Added Polypropylene
  19. Study on the Performance of Cooling Systems in Precision Injection Molds
  20. Measurement of Planar Orientation of Fibers for Reinforced Thermoplastics Using Image Processing
  21. Welding
  22. Dynamics and Structure Development in Spin Welding of Polyvinylidene Fluoride Cylindrical Rods
https://doi.org/10.3139/217.950221

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Fifteenth in a Series: Ikegai Corporation: From Engine Lathes to Twin Screw Extruders
  5. Die Extrusion
  6. Analysis of Polymer Flow through Coathanger Melt Distributors
  7. Viscosity and the Formation of Die Drool at the Polymer-Metal Interfaces
  8. Flow Implications in the Processing of Tetrafluoroethylene/Hexafluoropropylene Copolymers
  9. Reactive Processing
  10. Thermal/Peroxide Induced Degradation and Maleation of Polypropylene by Reactive Extrusion
  11. Fibers and Films
  12. Biaxially Oriented Polyethylene Films by Compression of Injection Moldings
  13. Tubular Film Blowing
  14. Tubular Film Blowing
  15. Molding
  16. Elastic Calculation of Residual Stresses in Injection Molding
  17. On the Limitations of Shear Induced Crystallization in Polypropylene Melts
  18. Structure and Properties of Injection Moldings of β-Crystal Nucleator-Added Polypropylene
  19. Study on the Performance of Cooling Systems in Precision Injection Molds
  20. Measurement of Planar Orientation of Fibers for Reinforced Thermoplastics Using Image Processing
  21. Welding
  22. Dynamics and Structure Development in Spin Welding of Polyvinylidene Fluoride Cylindrical Rods
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