| Surface |
Rough |
| Operating Temperature |
Up to 1200°F |
| Specific Gravity |
2.1 |
| Flexural Strength ASTM (D790) As Received |
72,000 PSI |
| Stiffness (Gurley) (.019" Sample) |
68,000 mg. Avg. |
| Elongation |
NIL |
Insulation Resistance after 24 Hrs.
91% RH/30°C |
4.1 x 108 Ohms/Sq. |
| Arc Resistance (ASTM D495-61) |
Greater than 250 sec. |
Dielectric Strength
(ASTM D149-64 Short time in air @ R.T.
2" dia. Electrodes - As Received) |
650+ VPM (Avg.) |
| Dielectric Constant (1 megacycle) at 25°C |
4.5 |
| Composition by weight (Approx.) |
92% mica & 8% binder |
| Moisture Absorption ASTM D570 |
24 hour immersion: Less than 3%
48 Hrs. at 85% RH: NIL
2 Hrs. at boiling: Less than 3% |
Thermal Conductiity - Perpendicular to laminates
(20°C to 100°C) (Cal/Cm/Cm2/Sec/Deg. C |
3 x 104 |
| Sheet Size |
18" x 44" |
Surface Resistance (Ohms)
(ASTM D257, 250 volts @ 1 min) |
As Received: 1.9 x 1013
After Aging 24 Hrs. @ 1000°F: 2.3 x 1010 |
| Surface Resistivity (Ohms) |
As Received: 2.6 x 1015
After Aging 24 Hrs. @ 1000°F: 3.0 x 1012 |
| Thermal Conductivity |
2.3 x 10-4 Cal/Sec/Cm2/°C |
| (Cenco-Fitch) |
0.666 BTU/Hr/Ft2/In/°F |
