Commodity Plastics
HIPS Injection Molding — High Impact Polystyrene for Injection Molding
HIPS is produced by adding polybutadiene rubber to GPPS, significantly improving its impact strength and toughness while retaining good processability and a smooth surface finish. It is opaque and widely used for appliance housings, electronic enclosures, toys, and disposable food containers.
HIPSPrimepolCarinex
Manufacturers
3
Grades
3
Applications
4
Equivalents
2
Physical Properties
- Density
- 1.04-1.06 g/cm³
- Water Absorption (24h)
- 0.05-0.2 %
- Transparency
- Opaque
- Shrinkage
- 0.4-0.8 %
Mechanical Properties
- Young's Modulus
- 1.5-2.5 GPa
- Tensile Strength
- 20-30 MPa
- Elongation at Break
- 5-20 %
- Impact Strength (Izod)
- 50-150 J/m
Thermal Properties
- Glass Transition Temperature
- 90-100 °C
- Melting Point
- N/A (amorphous)
- Continuous Service Temperature
- 60-70 °C
- Heat Deflection Temperature
- 70-80 °C
Electrical Properties
- Dielectric Constant
- 2.5-2.7
- Volume Resistivity
- >10¹⁵ Ω⋅cm
- Dielectric Strength
- 15-25 kV/mm
Chemical Resistance
- Acids
- Good resistance
- Bases
- Good resistance
- Solvents
- Attacked by aromatic hydrocarbons, ketones, and esters
- UV Resistance
- Poor
Sustainability
- Recyclability
- Recyclable
- Recycling Code
- 6 (PS)
- Carbon Footprint
- Moderate
Manufacturing compatibility
Injection moldingThermoformingExtrusion
Applications
Appliance housings
Toys
Packaging
Yogurt pots
Available grades
HIPS 450HIPS 825HIPS 734F