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Nomex® Paper

With such a large range of paper products to meet the many specifications of your motors, generators and transformers, DuPont may well offer every paper you could need.

Whether your electrical insulation needs demand creped papers, laminates or pressboard, DuPont™ Nomex®  offers you a complete portfolio of high-performance insulation solutions engineered for outstanding performance and reliability.

Nomex® papers and pressboards are made entirely of synthetic aromatic polyamide polymer. Paper and pressboard are the most widely used forms of Nomex® .

Type 410

Type 410 is the original form of Nomex® paper. Widely used in the majority of electrical equipment applications, it is produced in thicknesses from 0.05 to 0.76 mm (2 to 30 mil) with specific gravities from 0.7 to 1.2. As a high-density product, it offers high inherent dielectric strength, mechanical toughness, flexibility and resilience. Nomex® Type 410 is used in almost every known sheet insulation application.

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Type 411

Type 411, a lower density version of Nomex® paper, it is available in thicknesses from 0.13 to 0.58 mm (5 to 23 mil), with a specific gravity of 0.3 and correspondingly lower electrical and mechanical properties. It is used in application such as motor phase insulation and transformer coil end filler, where high bulk and conformability are of prime importance, along with increased impregnability and saturability.

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Type 414

Type 414 is electrically and thermally similar to Nomex® Type 410 but is processed to produce a strong but more flexible and conformable sheet with an open surface. Produced in thicknesses from 0.09 to 0.38 mm (3.4 to 15 mil), with specific gravities from 0.9 to 1.0, it is designed for use as slot insulation in hand-wound motors, for linear wrapping of wire and as main insulation for fluid-filled and dry-type transformers, where conformability and impregnability are required.

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Type 418

Type 418 is produced by intimately blending mica platelets with Nomex®. It is available in thicknesses from 0.08 to 0.36 mm (3 to 14 mil), and is designed for high-voltage applications, including motor conductor and coil wrap, and transformer ground and layer insulation. Nomex® Type 418 has high inherent dielectric strength of (30 to 40 kV/mm) (760 to 1015 V/mil), but can also be readily impregnated with varnishes when desirable. It offers increased voltage endurance compared to Nomex® Type 410.

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Type 419

Type 419 is a lower density version of Nomex® Type 418. It is available in two thicknesses, 0.18 mm (7 mil) and 0.33 mm (13 mil), with a specific gravity of 0.5 for applications where conformability and saturability are required.

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Type E56

Type E56 is a medium-density paper (specific gravity 0.7) produced in thicknesses from 0.13 to 0.51 mm (5 to 20 mil). This paper has mechanical and electrical properties that fall between Nomex® Type 410 and Nomex® Type 411. It offers a higher yield, and therefore, economically a more attractive solution in applications where it is not critical to use the full extent the mechanical or electrical properties of Nomex® Type 410.

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