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Polymer Type
Thermoplastic
Description of High Impact Polystyrene (HIPS)
HIPS has good dimensional strength, balanced properties of impact strength and
heat resistance, is easily machined, and is relatively low cost. Because of its
good impact strength at low temperatures, it is typically used for home
appliances, toys, and electrical components.
Advantages
Tougher than polystyrene. Cheap. Easily processed.
Disadvantages
Reduced electrical properties. Reduced transparency. Increased moisture
absorption.
Applications
As for Polystyrene for quality goods e.g. toys, household appliances, cases,
boxes, and calculators, computer housings.
Typical Properties for HIPS - High Impact Polystyrene
Property
Value
Density (g/cm3) 1.08
Surface Hardness
RM30
Tensile Strength (MPa)
42
Flexural Modulus (GPa)
2.1
Notched Izod (kJ/m)
0.1
Linear Expansion (/°C x 10-5)
7
Elongation at Break (%)
2.5
Strain at Yield (%)
1.8
Max. Operating Temp. (°C)
50
Water Absorption (%)
0.2
Oxygen Index (%)
18
Flammability UL94
HB
Volume Resistivity (log ohm.cm)
16
Dielectric Strength (MV/m)
15
Dissipation Factor 1kHz
0.0006
Dielectric Constant 1kHz
2.8
HDT @ 0.45 MPa (°C)
85
HDT @ 1.80 MPa (°C)
75
Material. Drying hrs @ (°C)
2 @ 70
Melting Temp. Range (°C)
210 - 270
Mould Shrinkage (%)
0.5
Mould Temp. Range (°C)
20 - 50
NOTE: The information contained herein are typical values intended for reference
and comparison purposes only. They should NOT be used as a basis for design
specifications or quality control. Contact us for manufacturers' complete
material property datasheets.
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