High Impact Polystyrene (HIPS)

High Impact Polystyrene (HIPS) is a versatile, economical and impact-resistant plastic that is easy to machine and fabricate. Impact Polystyrene is often specified for low strength structural applications when impact resistance, machinability, and low cost are required. It is frequently used machining pre-production prototypes since it has excellent dimensional stability and is easy to fabricate paint and glue.

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Common Uses:

  • Consumer products: Appliance components, toy, TV and audio-visual equipment parts, recording tape cassettes, bicycle trailer, toys
  • Automotive industry: Instrument panels and fittings, gasoline tanks
  • Food Services: Hot and cold drinking cups
  • Office Products: Computer Housings

Physical Properties:

  • Specific Gravity – 1.04g/cm
  • Tensile Strength – 3130 psi
  • Flexural Strength – 4620 psi
  • Impact Strength – 2.20ft.-lb/in

General Properties:

  • Maintains strength in high-impact applications
  • Can be painted
  • Recyclable with good property retention
  • Easily moldable
  • FDA compliant grades
  • Good dimensional stability
  • Good gloss
  • Low volatility


  • Injection Molding
  • Extrusion

Grades        MFR           Application                           Typical Application

7026          2.4               Extrusion                    sheets, disposable dishware, electronic packaging, air ducting for car                                                                                                                        heater, TV and tape recorder equipment

4035          3.3        Extrusion/Injection              Refrigerator liners, refrigerator door paneling, sheet extrusion                                                                                                                                applications and for injection modules

6045           4         Extrusion/Injection             housewares, Food packaging a beverage cups, packaging for dairy                                                                                                                         products, disposable dishware, toys

7055          4.5               Extrusion                    Refrigerator liners, packaging for oily foods and dairy products, sheet                                                                                                                     extrusion applications

5073           7         Extrusion/Injection               Food containers, Sheets, Housewares

4125          12        Extrusion/Injection              Housewares, Toys an food containers

3163          16                Injection                     Printers and copies, ventilators, TV back covers, Office machines, monitor

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