HIPS, High Impact Polystyrene

HIPS plastic sample

HIPS is typically is produced by compounding PS with around 5-10% rubber or butadiene copolymer. As the name indicates, this makes the material significantly more impact resistant.

Why choose it?

  • Inexpensive commodity plastic with good impact resistance
  • Easy to process, good dimensional stability
  • FDA approved

Why not choose it?

  • Poor high-temperature resistance
  • Fairly low strength and modulus (stiffness)
  • Poor chemical resistance
  • Prone to stress-cracking
  • Poor UV-resistance, can not be recommended for outdoor use.

Typical applications:

  • Computer and keyboard housings
  • Toys
  • Packaging


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