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Premium N-K-N Flexible Laminate Insulation Sheet - 3-3-3 Construction
Our N-K-N (Nomex-Kapton-Nomex) Insulation Sheet is a high-grade, 3-ply electrical laminate engineered for heavy-duty electrical systems. Constructed using a rugged 3-3-3 configuration (3 mil Nomex / 3 mil Kapton / 3 mil Nomex), this 36" x 36" sheet provides an overall nominal thickness of 9 mils. It combines the superior thermal stabilization and tear resistance of DuPont Nomex® paper with the upgraded electrical barrier properties of an extra-thick Kapton® polyimide film core.
Rated for Class H (180°C to 220°C) continuous operations, this flexible composite sheet maintains its structural integrity and electrical isolating characteristics under intense thermal spikes, mechanical stress, or harsh chemical exposure. It is highly conformable, easy to die-cut or slice, and is ideal for custom high-voltage phase barriers and lining applications.
Technical Specifications
| Property |
Value |
Description |
| Voltage Resistance |
≥ 17,000 to 20,000 V |
Maximum dielectric strength across all layers prevents electrical tracking and leaks. |
| Thickness Code (3-3-3) |
9 Mil Nominal (0.23 mm) |
Signifies a heavy symmetrical configuration of 3 mil Nomex, 3 mil Kapton core, and 3 mil Nomex. |
| Max Temperature |
220° C |
Maximum operating temperature without breaking down. |
| Tensile Strength |
~ 150 - 220 lbs/inch |
Maximum structural integrity to resist heavy mechanical stress and automated winding machinery. |
| Volume Resistivity |
10¹⁵ Ω-cm |
Excellent electrical isolation. |
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Applications
Key Applications
- High-Output Electric Motors: Superior performance for slot liners, wedges, phase-to-phase separation, and pole insulation in heavy traction motors and generators.
- Power Transformers: Reliable ground, layer, and barrier insulation for large dry-type transformers and inductors.
- Aerospace & Automotive: Utilized in aircraft generators, traction motor armatures, and under-hood EV (Electric Vehicle) electronics exposed to high heat.
- Heavy Industrial Electronics: Serves as a rugged thermal and electrical shield in severe-duty power supplies, welding apparatus, and inverter enclosures.
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