Thermoplastic Elastomer

Symbol: TPE
Crystallinity: Amorphous
Trade Names: Kraton, Santoprne, Alcryn, Lomod, Riteflex, Ontex, Sterion

Learn more about Thermoplastic Elastomer

Description:

TPE Spatula Fotolia_28956936_M.jpgTPE is a combination of rubber and plastic that can be processed with conventional thermoplastic injection and extrusion plastics machinery. It is often used as a replacement for natural rubber. TPE polymers offer flexible, insulating, non slip surfaces like natural rubber with the benefits of increased resistance to chemicals, heat and weathering. They can also be successfully colored, co-molded and recycled. All TPEs are formulated with a blend of crystalline and amorphous polymers.

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 TPE and residence time.
  • Custom Design: A custom design screw is recommended when processing TPE.
  • 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 and coatings can be used.
  • Similar to Resin: TPE processes similar to TPU, TPO, PP & HDPE.

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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