HIPS High Impact Polystyrene Material Properties

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.

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.