Acrylonitrile Butadiene Styrene

Symbol: ABS
Crystallinity: Amorphous
Trade Names: Cycolac, Terlux, Magnum, Lustran

Learn More about ABS.


ABS is an amorphous thermoplastic combining three monomers to provide impact strength, rigidity, high gloss, chemical resistance, heat stability, and resistance to aging. Typical combination is 15-30% acrylonitrile, 5 – 30% butadiene, and 45 – 75% styrene. ABS has a reputation for being the best of the styrenic family. One reason for this distinction could be its ease in processing. ABS materials have a wide processing window which can mean favorable results in different environments.

Processing Considerations:

  • Residence Time: Residence time ranges from 2 to 4 minutes.
  • Back Pressure: Keep back pressure below 150 PSI (or 1500 plastic pressure) and screw at 30 or less.
  • Drying: The material must be dried, typically between 150°F and 195°F for 2 – 3 hours.
  • RPM: RPM is typically 30 to 100.

Screw Design Based on:

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

Other Information:

  • Mixer: A low shear, mixing screw can be used to run ABS. Reiloy Westland Corporation’s Eagle mixer has been proven to successfully process this resin.
  • Barrier: Barrier screws are not recommended.
  • Custom Design: A zero-meter screw design is highly recommended.
  • Recommended Valve: A three piece free-flow valve is recommended as good ring travel is needed on the valve.
  • Screw & Barrel Material Recommendation: Use chrome-plated, 17-4PH or PM420V for screws. Barrels can be manufactured from standard materials.

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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