Polyethylene Terephthalate - PET Crystalline

Polymer Type

Thermoplastic

Advantages

Good balance of rigidity, strength and dimensional stability. Resistance to discolouration on heating. Excellent thermal and chemical resistance.

Disadvantages

Harmful odours can be evolved during processing. Adequate ventilation should be provided. Granules must be thoroughly dried before processing to limit the occurrence of hydrolytic degradation. High mould temperatures ( 140°-160°C / 285°-320°F ) required for optimum properties.

Typical Properties

Property

Value

Density (g/cm3)

1.37

Surface Hardness

RM85

Tensile Strength (MPa)

75

Flexural Modulus (GPa)

3

Notched Izod (kJ/m)

0.02

Linear Expansion  (/°C x 10-5)

8

Elongation at Break (%)

70

Strain at Yield (%)

4

Max. Operating Temp. (°C)

115

Water Absorption (%)

0.1

Oxygen Index (%)

20

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

15

Dielectric Strength (MV/m)

17

Dissipation Factor 1kHz

0.002

Dielectric Constant  1kHz

3.3

HDT @ 0.45 MPa (°C)

115

HDT @ 1.80 MPa (°C)

80

Material. Drying  hrs @ (°C)

2 @130

Melting Temp. Range (°C)

260 - 280

Mould Shrinkage (%)

2

Mould Temp. Range (°C)

80 - 100

Applications

Transformer bobbins, housings for electrical appliances, industrial plugs and sockets.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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