Nomex® refers to a family of aramid materials developed by DuPont for electrical insulation, thermal protection, and high-temperature applications. ADDEV Materials distributes Nomex® with a global stock and transforms the materials into ready-to-integrate formats: sheets, rolls, laminates, cut parts, and industrial kits.
The page is aimed at engineers, buyers and methods teams looking for a reliable material for electric motors, transformers, batteries, railway systems, data centres and industrial equipment.
Nomex® is a meta-aramid, also called poly(m-phenyleneisophthalamide). Its aromatic structure provides it with high thermal stability, good chemical resistance, and inherent flame-retardant properties.
Unlike materials flame-retarded by treatment, Nomex® does not rely on a surface additive. Its fire resistance is linked to the polymer's chemistry and does not wash out, migrate, or wear away like a flame-retardant treatment.
Under intense heat, Nomex® does not melt or drip. The material gradually carbonises, forming a protective barrier, making it relevant for electrical systems exposed to heat, arcs or repeated thermal stress.
Nomex® is selected when insulation needs to remain stable under thermal, electrical, and mechanical stress. The material combines flame resistance, dimensional stability, and dielectric performance in demanding industrial environments.
Electrical insulation for motors, windings, and transformers
Continuous thermal hold up to approximately 204°C
Intrinsic fire resistance without surface treatment
Behaviour without melting or dripping under high heat
ADDEV Materials distributes DuPont Nomex® materials and adapts them to industrial integration constraints. The most commonly used references mainly concern Nomex® 410 and Nomex® 414 papers in various thicknesses.
| Nomex® range | Format / Reference | Main function | Types of applications |
|---|---|---|---|
| Nomex® 410 | Aramid paper, insulating, 2 to 30 mil according to ADDEV references | High temperature dielectric insulation | Electric motors, transformers, windings, interleaving sheets |
| Nomex® 410 — WI-410-A | 5 mil, beige | Insulating separation and thermal insulation | Notch funds, insulating layers, cut-out parts |
| Nomex® 410 — WI-410-B / C / D | 10, 15 and 20 thousand, beige colour | Enhanced isolation according to mechanical constraint | Transformers, motors, electrotechnical equipment |
| Nomex® 410 — WI-410-E / G / J | 30,2 and 7 thousand, beige colour | Thickness adaptation according to electrical design | Dividers, separators, coils and insulating kits |
| Nomex® 414 | 10 mil, aramid paper insulating | Electrical insulation and thermal resistance | Electrical engineering applications requiring stability and durability |
| Nomex® Laminates | Nomex® combined with technical films or adhesives | Combined dielectric, mechanical, and process performance | Electrical modules, batteries, traction, power equipment |
The choice of Nomex® depends on the thickness, the target thermal class, the dielectric strength, the impregnation process, and the integration format: roll, sheet, die-cut part, or kit.
Nomex® properties vary depending on the product form, thickness and grade. The parameters below serve as a basis for selection in electrical, thermal and mechanical insulation applications.
Nomex® is used in Power & Mobility systems when electrical insulation needs to retain its properties under heat, mechanical stress, aging, and fire safety requirements.
ADDEV Materials transforms Nomex® into ready-to-integrate formats for motors, transformers, battery modules, power equipment, and electrotechnical systems. Converting allows for optimisation of thickness, geometry, handling, and production repeatability.
Choosing Nomex® from ADDEV Materials ensures the secure selection of materials and the industrial integration of aramid insulation:
Are you looking for Nomex® paper, aramid laminate, or a finished insulating part for an engine, transformer, battery, or power system? ADDEV Materials can help you define the suitable material, thickness, format, and level of processing for your application.
The choice depends on the operating temperature, the required dielectric strength, the thickness, compatibility with impregnation varnishes, and the mechanical constraints of the system. For a motor or transformer, the integration format must also be verified: slot liner, interlayer, winding, sheet, or cut-out part.
Yes. Nomex® papers and laminates are used for electrical insulation in motors, transformers and power equipment. Selection must, however, be validated according to voltage, thickness, thermal environment and impregnation system.
Nomex® is commonly selected for high-temperature applications with a recommended continuous use around 204°C. Actual performance depends on the grade, thickness, duration of exposure, and chemical or humid environment.
No. Nomex® does not exhibit a melting point like many thermoplastic polymers. Under intense heat, it gradually chars and forms a barrier, which limits the risks associated with melting or flaming drips.
Nomex® offers better thermal resistance and inherent fire behaviour. Polyester films are often more economical but more limited in temperature and fire resistance. The choice depends on the level of thermal, electrical stress, and the target cost.
Yes. Nomex® can be used with varnishes and impregnating resins in electrical systems. This compatibility allows for improved coil cohesion, mechanical strength, and dielectric performance of the complete system.
The most frequently used references primarily concern Nomex® 410 papers in several thicknesses, notably 2, 3, 5, 7, 10, 15, 20 and 30 mil, as well as Nomex® 414 in 10 mil. The choice depends on the available thickness, format, and application constraint.
Yes. ADDEV Materials can convert Nomex® into slit rolls, sheets, interleaving paper, die-cut parts, laminates, and kits. This approach reduces customer operations and ensures repeatability in serial production.
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