Low Density Polyethylene - LDPE

Polymer Type

Thermoplastic

Advantages

Cheap, good chemical resistance.  High impact strength at low temperatures.  Excellent electrical properties.  Can be processed by all conventional methods.  Can be transparent in thin film form.

Disadvantages

Low strength, stiffness and maximum operating temperature.  Flammable.  Poor UV resistance.  High gas permeability ( particularly CO2 ).  Susceptible to environmental stress cracking.

Typical Properties

Property

Value

Density (g/cm3)

0.92

Surface Hardness

SD48

Tensile Strength (MPa)

10

Flexural Modulus (GPa)

0.25

Notched Izod (kJ/m)

1.06+

Linear Expansion  (/°C x 10-5)

20

Elongation at Break (%)

400

Strain at Yield (%)

19

Max. Operating Temp. (°C)

50

Water Absorption (%)

0.01

Oxygen Index (%)

17

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

16

Dielectric Strength (MV/m)

27

Dissipation Factor 1kHz

0.0003

Dielectric Constant  1kHz

2.3

HDT @ 0.45 MPa (°C)

50

HDT @ 1.80 MPa (°C)

35

Material. Drying  hrs @ (°C)

NA

Melting Temp. Range (°C)

220 - 260

Mould Shrinkage (%)

3

Mould Temp. Range (°C)

20 -  40

Applications

Chemically resistant fittings, bowls, lids, gaskets, toys, containers, packaging film, film liners, squeeze bottles.  Heat-seal films for metal laminates.  Pipe, cable covering, core in UHF cables. 

 

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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