Polystyrene (PS) plastic is a naturally transparent thermoplastic that is available as both a typical solid plastic as well in the form of a rigid foam material. PS is used in a wide variety of industries and applications such as toys, household appliances, Automotive, electronics, medical, etc. General Purpose Polystyrene (GPPS) and High Impact Polystyrene (HIPS) are the most common uses PS resins for injection molding. GPPS is clear, but brittle (think of a CD jewel case) while HIPS is opaque and much less brittle.

Advantages of (PS)

  • Resistance to bacterial growth
  • Resistance to moisture
  • Lightweight
  • Provides insulation
  • Durable Recyclable

Resin Identification Code:

PS Specifications:

Melt Temperature 210-249 °C (410-480 °F) *
Typical Injection Molding Temperature 38 - 66 °C (100 - 150 °F) *
Heat Deflection Temperature (HDT) 95 °C (284 °F) at 0.46 MPa (66 PSI) *
Tensile Strength 53 MPa (7700 PSI) *
Flexural Strength 83 MPa (12000 PSI) *
Specific Gravity 1.04
Shrink Rate 0.3 - 0.7 % (0.003 - 0.007 in/in) *

*At standard State