Table 1 NEMA 85-P

 

Typical Test Values For Nominal 0.020" Mica Paper Heater Plate

Thickness:
(ASTM D374)
.0219" Avg.
.0231" Max.
.0199" Min.
Bond Content:
(ASTM D352)
11.0% by Wgt. Avg.
Flexural Strength:
(ASTM D790)
20,900 PSI Avg.
Tensile Strength:
(ASTM D828)
420 LBS. / In. Width Avg.
Stiffness:
(W. & L. E. Gurley Stiffness Tester)
269,080 Milligrams Avg.
Moisture Pick-Up:
(ASTM D570, 24 hrs. in H2O @ room temerature)
1.3% Avg.
ARC Resistance:
(ASTM D495, Seconds)
As Received: 231 Avg.
After 24 Hrs. @ 1000F: Greater than 600
Power Factor @ 60 Cycles:
(ASTM D150)
3.2% Avg.
Dielectric Strength:
(ASTM D149-64,
short-time in air @ R.T., 2" diameter electrodes)
As Received: 480 VPM Avg.
After 24 Hrs. @ 1000F: 500 VPM Avg.
Volume Resistance (Ohms):
(ASTM D357, 250 volts @ 1 min.)
As Received: 3.8 x 1013
After Aging 24 Hrs. @ 1000F: 7.5 x 1010
Volume Resistivity(Ohm-Cm) As Received: 2.3 x 1016
After Aging 24 Hrs. @ 1000F: 5.3 x 1013

Spruce Pine Mica Company
P.O. Box 219 Spruce Pine, N. C.  28777
Phone (828) 765-4241

info@spruce-pine-mica.com

 

Home ] Natural Mica ] Mica Paper ] Plastics ] Glass Laminates ]