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Electrically Insulating Materials
Electrically insulating materials are chosen to block the flow of electricity. Correctly chosen materials can increase the efficiency or extend the life of your unit, reduce failures and repairs, and provide an added safety margin against unforeseen electrical stress situations in your electrical equipment.
Material Types Available
| Fibre/Paper: |
Fishpaper, vulcanized fibre, fibreboard, rag fibre, aramid paper |
| Industrial Laminates: |
canvas, fiberglass, nylon, carbon fibre, epoxy, polyimide, polyester |
| Plastics: |
polypropylene, polyimide, polycarbonate, FEP teflon, |
| Tapes: |
polyester, polyimide, teflon |
Things to Think About
When choosing an electrically insulating material, consider the following:
- Flame Resistance
- Dielectric Strength
- Temperature Range
- Moisture Resistance
- Puncture Resistance
- Forming Capabilities
- Thickness
| |
UL 94 FR Rating |
High Temperature Range |
Dielectric Strength |
|---|
| Unbleached Kraft (VHR 115) |
UL 94 HB |
230° F |
250 V/Mil |
| Aramid Fibre (Nomex 410) |
UL 94 V-0 |
430° F (continuous) |
430 V/Mil |
| Vulcanized Fibre (Fishpaper) |
UL 94 HB |
239° F |
400 V/Mil |
| Epoxy Glass (FR4) |
UL 94 V-0 |
(approx.) 265° F |
840 V/Mil |
| Polypropylene (Formex) |
UL 94 V-0 |
203-240° F |
1800-2200 V/Mil |
| Polyimide (Kapton Film) |
UL 94 V-0 |
390-428° F (continuous) |
6,000 V/Mil |
| Polycarbonate (Lexan) |
UL 94 V-0 |
185° F (continuous) |
17,000 V/Mil |
| Teflon (FEP) |
UL 94 V-0 |
400° F (continuous) |
6,500 V/Mil |
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