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 Plastic Brief

 

Tech Brief  > PI
 
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Polyimide - PI 25% Graphite Lubricated

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)
Surface Hardness
Tensile Strength (MPa)
Flexural Modulus (GPa)
Notched Izod (kJ/m)
Linear Expansion (/°C x 10-5)
Elongation at Break (%)
Strain at Yield (%)
Max. Operating Temp. (°C)
Water Absorption (%)
Oxygen Index (%)
Flammability UL94
Volume Resistivity (log ohm.cm)
Dielectric Strength (MV/m)
Dissipation Factor1kHz
Dielectric Constant 1kHz
HDT @ 0.45 MPa (°C)
HDT @ 1.80 MPa (°C)
Material Drying hrs @ °C
Melting Temp. Range (°C)
Mould Shrinkage (%)
Mould Temp. Range (°C)
 1.50
RM89
62
3.17
0.04
3.4
6
N/Y
260
0.19
45
V0
12
9.8
0.004
13.5
260+
345
NA
NA
0.19
NA


 

 

Applications
Valve seats, compressor rings.
 
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