High Density Polyethylene – HDPE

Polymer Type

Thermoplastic

Advantages

Good low temperature impact resistance. Excellent chemical resistance.

Disadvantages

Susceptible to stress cracking. Has lower stiffness compared to Polypropylene. High mould shrinkage and poor UV resistance.

Typical Properties

Property	Value
Density (g/cm³)	0.96
Surface Hardness	SD68
Tensile Strength (MPa)	32
Flexural Modulus (GPa)	1.25
Notched Izod (kJ/m)	0.15
Linear Expansion (/°C x 10^-5)	12
Elongation at Break (%)	150
Strain at Yield (%)	15
Max. Operating Temp. (°C)	55
Water Absorption (%)	0.02
Oxygen Index (%)	17
Flammability UL94	HB
Volume Resistivity (log ohm.cm)	17
Dielectric Strength (MV/m)	22
Dissipation Factor 1kHz	0.0005
Dielectric Constant 1kHz	2.3
HDT @ 0.45 MPa (°C)	75
HDT @ 1.80 MPa (°C)	46
Material. Drying hrs @ (°C)	NA
Melting Temp. Range (°C)	220 - 310
Mould Shrinkage (%)	3
Mould Temp. Range (°C)	30 - 70

Applications

Pipe and pipefittings for water transportation. Toys, bowls, buckets, milk bottles, crates, tanks, containers. Film for packaging. Blown bottles for food. MDPE (Medium Density Polyethylene) is used for gas pipes and fittings.

For more information on Plascams please visit RAPRA Technology Ltd.