Flexible Composite Materials
NMN (NPN) – 6640
Nomex® aramid paper / PET film / Nomex® aramid paper, Class F
6640 NPN/NMN is a three-layer flexible laminate of Nomex® aramid paper, PET film and Nomex® aramid paper, bonded with a Class F adhesive. The aramid paper adds heat and tear resistance; the film provides dielectric strength.
Class F (155°C)0.15–0.35 mmBreakdown ≥7–18 kV
- Temperature class
- Class F (155°C)
- Thickness
- 0.15–0.35 mm
- Width
- 5–914 mm
- Gram weight
- 180–430 g/m²
Request a quotation or a sample. Tell us thickness, width, temperature class, quantity and delivery form. We reply within one business day.
Technical data
| Property | Unit | Value |
|---|---|---|
| Type | — | 6640 NPN (NMN) |
| Structure | — | Nomex® aramid paper + PET film + Nomex® aramid paper |
| Normal thickness | mm | 0.15 / 0.18 / 0.20 / 0.23 / 0.25 / 0.30 / 0.35 |
| Thickness tolerance | mm | ±0.02 / ±0.03 |
| Grammage | g/m² | 180±25 – 430±50 |
| Tensile strength MD, unbent | N/10 mm | ≥150–270 |
| Breakdown voltage, unbent | kV | ≥7–18 |
| Width | mm | 5–914 |
| Temperature index (TI) | — | ≥155 |
| Temperature class | — | Class F (155°C) |
Values are typical values or ranges from our product data. Bulk supply is subject to the approved specification, sample and test report. If a parameter you need is not listed here, ask our engineers for the full test report for that grade.
Key features
- Aramid paper offers heat and tear resistance; the film provides dielectric strength.
- Three-layer construction bonds tightly after hot pressing and resists delamination.
- Standard width 914 mm; slitting and custom widths available.
Applications
Class F motor slot, phase and turn insulation; dry-type transformer layer insulation; appliance insulation.
Electric Motors & GeneratorsDry-Type TransformersSwitchgear & Electrical Equipment
Why it fits
Where a polyester non-woven would tear or age too fast - aramid paper keeps the insulation intact under insert and cut.
Ordering information
To receive a quotation, please confirm:
- Product and grade
- Thickness and width (and roll or sheet size)
- Temperature class
- Quantity and delivery form (roll / sheet / die-cut / machined)
- Destination port and required delivery date
For machined parts, attach a drawing in PDF, DWG or STEP format. Datasheets, COAs and batch test data are available on request.
Related materials
Often specified together
Send your specification
Our export team reviews the application, the process and the existing specification before recommending a construction.