| Chemical Designation |
Polyimide
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| DIN Abbreviation |
PI
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| Colour, Filler |
Redish brown
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| Stock Availabilty | ||||
| Main Characteristics | ||||
| Preferred Fields | ||||
| Applications | ||||
| MECHANICAL | ||||
| Properties |
Unit
|
Test method
DIN ASTM |
||
| Density |
g/cm3
|
53 479
|
1.33
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| Tensile strength/ yield |
MPa
|
53 455
|
94
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| Tensile strength/ break |
MPa
|
53 455
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| Elongation / break |
%
|
53 455
|
90 to 60
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| Modules of elasticity/tension |
MPa
|
53 457
|
2800
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| Modules of elasticity/flexure |
MPa
|
53 457
|
3000 to 3300
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| Ball indentation hardness |
MPa
|
53 456
|
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| Impact strength (charpy) |
kJ/m2
|
53 453
|
90
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|
| Creep rupture strength /1000 hrs static load |
MPa
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| Time yield 1% elongation/1000hrs |
MPa
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| Coefficient of friction/ hardened & ground steel |
-
|
0.3 to 0.38
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| Wear/ as above |
mm/km
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| THERMAL | ||||
| Properties |
Unit
|
Test method
DIN ASTM |
||
| Crystaline melting point |
ºC
|
53 736
|
388
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|
| Glass transition temperature |
ºC
|
53 736
|
250
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| Heat distortion temperature | Method A |
ºC
|
ISO 75
|
238 to 256
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| Method B |
ºC
|
ISO 75
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| Field33 | ||||
| Maximum service temperature | short term |
ºC
|
up to 330
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| long term |
ºC
|
up to 240/ 250....300
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| Coefficient of thermal conductivity |
W/(m.K)
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| Specific heat |
J(g.K)
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| Coefficient of thermal expansion |
10-5/K
|
5.5
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| ELECTRICAL | ||||
| Properties |
Unit
|
Test method
DIN ASTM |
||
| Dielectric constant at 105 HZ |
53 483
|
3.1
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| Dielectric loss factor 105 HZ |
S.cm
|
53 483
|
0.0034
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| Specific volume resistance |
S
|
53 482
|
>1.00E+17
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| Surface resistance |
53 482
|
>1.00E+17
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| Dielectric strength 1 mm |
KV/mm
|
53 481
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| Tracking resistance |
53 480
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| MISCELLANEOUS | ||||
| Properties |
Unit
|
Test method
DIN ASTM |
||
| Moisture absorption |
%
|
53 714 |
1.0
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| Water absorption at saturation at 23 §C |
%
|
53 495 |
1.4
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| Resistance to hot water, washing soda |
resistant
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| Flammibilty | UL 94 |
V-O
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| Resistance to weathering |
not resistant,
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| Compliance | ||||