Polymethylpentene - TPX

Polymer Type

Thermoplastic

Advantages

Very low density (0.83g/cm3). Transparent. Reasonably high continuous use temperature (approx. 75°C (170°F)).  May be autoclaved for sterilisation.  Good high frequency electrical properties.

Disadvantages

Higher cost than other polyolefins.  Somewhat brittle (though better impact resistance than Acrylic, Polystyrene or SAN).  Higher mould shrinkage than Polystyrene or SAN.  Poor UV resistance.  Higher gas permeability than other polyolefins.

Typical Properties

Property

Value

Density (g/cm3)

0.83

Surface Hardness

RL70

Tensile Strength (MPa)

28

Flexural Modulus (GPa)

1.5

Notched Izod (kJ/m)

0.04

Linear Expansion  (/°C x 10-5)

12

Elongation at Break (%)

15

Strain at Yield (%)

6

Max. Operating Temp. (°C)

75

Water Absorption (%)

0.01

Oxygen Index (%)

17

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

16

Dielectric Strength (MV/m)

28

Dissipation Factor 1kHz

0.0002

Dielectric Constant 1kHz

2.12

HDT @ 0.45 MPa (°C)

100

HDT @ 1.80 MPa (°C)

41

Material. Drying hrs @ (°C)

NA

Melting Temp. Range (°C)

260 - 320

Mould Shrinkage (%)

2.5

Mould Temp. Range (°C)

40 - 70

Applications

Medical components - syringes, dishes, measuring flasks.  Microwave cookware, coffee filters.  Chemical laboratory apparatus, e.g. dishes, test tubes, sight glasses, tubing.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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