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Nomex®

Aramid paper

Nomex® aramid paper is mainly employed as dielectric insulator for high temperature systems. It provides lightweight, durable, heat and flame-resistant performance for many applications and industries

Aging diagrams show that an insulation system based on Nomex® paper has a lifetime over 20.000 hours at 220°C. Apart from heightening the average lifetime of electrical appliances Nomex® reduces considerably the number and probability of damages and protects the machine in case of electrical overload and temperature peaks. Its supe­rior mechanical toughness enables windings to withstand the most severe mechanical shocks. The resistance to cryogenic temperatures, humidity, radiation and fire and its non-toxic fumes complete the list of Nomex®’s unique characteristics. These improve the integrity and performance of everything from transformers and generators to wind turbine systems and hybrid electric vehicles.

Nomex® is classified as insulator class C 220°C by Underwriters Laboratories (file E34739) and all major certifying bodies worldwide.
Nomex® 410: is the original form and it is made up of a calendered paper available in different thicknesses.
Nomex® 411: is an uncalendered paper, so with lower electrical and machanical proper­ties when compared to 410, but with a slight permeability to resins and varnishes.
Nomex® 414: is similar to 410, but is calendered under different conditions which pro­duce a strong, more flexible and conformable sheet.
Nomex® 818: also called Nomex Mica is produced by adding 50% mica platelets to the floc and fibrids. 818 is a calendered product with high inherent dielectric strength and can also be impregnated with varnishes if required.
Nomex® 992: is a low-density pressboard produced in 2 thicknesses (1.6 and 3.2 mm ).
Nomex® 993: is a medium-density pressboard produced in 6 thicknesses (1.0 to 4.0 mm).
Nomex® 994: is a high density pressboard available in 12 thicknesses (1.0 to 9.6 mm).
Nomex® 356: is a low-density type available in thicknesses from 0.13 to 0.51 mm.

Notes and certifications

Available Widths 6-1828mm
Thermal Classes C :220°C
Available Thickness 40-760μm
UL certified
Nomex® is a DuPont registered trademark

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