Thermoplastic PolyOlefin

Symbol: TPO
Crystallinity: Semi-Crystalline
Trade Names: Dexflex, Eastar, Engage


TPO car door panel Fotolia_40610318_M.jpgTPO is in the family of amorphour to semi-crystalline POE. This resin can come in low to high gloss. TPO can be diverse in stiffness, impact and expansion properties.

Processing Considerations:

  • Residence Time: Residence time is typically 1.5 to 6 minutes.
  • Back Pressure: Back pressure runs 150 PSI (1500 plastic pressure) or less.
  • Drying: Drying depends upon residence time.
  • RPM: RPM runs 25 or greater.

Screw Design Based on:

  • Medium Compression Ratio
  • Medium Transition Length
  • Medium Meter Channel Depth

Other Information:

  • Mixer: A mixer is recommended when adding color or processing with fillers.
  • Barrier: The use of barrier screws is dependent upon grade of TPO and residence time.
  • Custom Design: A custom design screw is recommended when processing TPO.
  • Recommended Valve: A 3 piece free flow, 3 piece locking, 4 piece valve assembly or ball check can be used.
  • Screw & Barrel Material Recommendation: Standard alloys can be used unless running reinforcements in resin.
  • Similar to Resin: TPE processes similar to TPE, TPO, PP & PE.

Various additives and/or fillers can have an effect on a resin’s process behavior. For more detailed information, please contact Reiloy Westland Corporation.

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Industry Applications - Resins

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