Polyarylate - Par.

Polymer Type

Thermoplastic

Advantages

Transparent (although slight yellow tint). Impact strength similar to medium impact ABS.  Good heat resistance UL temperature index 125°C (260°F). Resistant to UV radiation.

Disadvantages

Susceptible to stress cracking by hydrocarbon solvents.  Requires high processing temperatures (c. 350°C (660°F)).

Typical Properties

Property

Value

Density (g/cm3)

1.21

Surface Hardness

RR125

Tensile Strength (MPa)

68

Flexural Modulus (GPa)

2.2

Notched Izod (kJ/m)

0.29

Linear Expansion  (/°C x 10-5)

6.3

Elongation at Break (%)

50

Strain at Yield (%)

8.8

Max. Operating Temp. (°C)

130

Water Absorption (%)

0.26

Oxygen Index (%)

36

Flammability UL94

V0

Volume Resistivity (log ohm.cm)

16

Dielectric Strength (MV/m)

15.1

Dissipation Factor 1kHz

0.005

Dielectric Constant  1kHz

3.13

HDT @ 0.45 MPa (°C)

171

HDT @ 1.80 MPa (°C)

170

Material. Drying  hrs @ (°C)

4 @140

Melting Temp. Range (°C)

330 - 350

Mould Shrinkage (%)

0.75

Mould Temp. Range (°C)

65 - 130

Applications

Glazing, electrical connectors, housings for appliances. 

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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