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.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

Date Added: May 11, 2001 | Updated: Jun 11, 2013
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