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.