Polyimide - PI 25% Graphite Lubricated

Aug 16 2001

Advantages

Best friction and wear characteristics of the polyimides contained within Plascams. Slightly higher flexural modulus and lower linear expansion compared with unmodified polyimide.

Disadvantages

Reduced tensile strength, elongation at break, notched impact strength, HDT and oxygen index compared with unmodified polyimide.

Typical Properties

Property

Value

Density   (g/cm3)

1.50

Surface Hardness

RM89

Tensile Strength (MPa)

62

Flexural Modulus (GPa)

3.17

Notched Izod (kJ/m)

0.04

Linear Expansion (/°C x 10-5)

3.4

Elongation at Break (%)

6

Strain at Yield (%)

N/Y

Max. Operating Temp. (°C)

260

Water Absorption (%)

0.19

Oxygen Index (%)

45

Flammability UL94

V0

Volume Resistivity (log ohm.cm)

12

Dielectric Strength (MV/m)

9.8

Dissipation Factor1kHz

0.004

Dielectric Constant  1kHz

13.5

HDT @ 0.45 MPa (°C)

260+

HDT @ 1.80 MPa (°C)

345

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

NA

Mould Shrinkage (%)

0.19

Mould Temp. Range (°C)

NA

Applications

Valve seats, compressor rings.

 

Source : Abstracted from Plascams

For more information on Plascams please visit The Rubber and Plastics Research Association

 

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