Polyvinyl Chloride - Rigid

Symbol: PVC-R
Crystallinity: Amorphous
Trade Names: Geon, Dural, Colorite, Georgia Gulf

Learn more about Polyvinyl Chloride – Rigid.


PVC-R Pipe Fotolia_35651903_S.jpgRigid PVC is a relatively low cost resin with excellent weatherability, elecrical properties and chemical and impact resistance. It has a good surface appearance, UV color stability and is easily welded and painted.

Processing Considerations:

  • Residence Time: Residence time is typically 2 to 4 minutes.
  • Back Pressure: Back pressure runs 100 PSI (1000 plastic pressure) or less.
  • Drying: PVC-R does not require drying but it may help surface finish.
  • RPM: RPM runs 100 or less.

Screw Design Based on:

  • Low Compression Ratio
  • Long Transition Length
  • Deep Meter Channel Depth

Other Information:

  • Mixer: A low shear mixing element, like Reiloy Westland Corporation’s Eagle, is recommended.
  • Barrier: Barrier screws are not recommended when processing PVC-R.
  • Custom Design: PVC-R should not be processed with general purpose screws.
  • Recommended Valve: A smear tip or 3 piece free flow is recommended.
  • Screw & Barrel Material Recommendation: Creates corrosive environment resulting from HCL acid in the resin. Stainless steel or chrome plate for the screw and a premium bimetallic barrel is recommended.

Do not allow material to contact acetals. Purge with acrylic or ABS to clean.

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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