NOMEX

Inherent dielectric strength
In densified form, NOMEX® products withstand short-term electrical stresses of 18 to 40 kV/mm (457 to 1015 V/mil) depending on product type and thickness, with no need for further treatment with varnishes or resins.

Mechanical toughness
Densified NOMEX® products are strong, resilient and (in the thinner grades) flexible, with good resistance to tearing and abrasion.

Thermal stability
Temperatures up to 200°C have little or no effect on the electrical and mechanical properties of NOMEX® products, and useful values are retained at considerably higher temperatures. Furthermore, these useful properties are maintained for at least 10 years of continuous exposure at 220°C.

Chemical compatibility
NOMEX® is essentially unaffected by most solvents, and is unusually resistant to attacks by acids and alkalis. It is compatible with all classes of varnishes and adhesives, transformer fluids, lubricating oils, and refrigerants. Since NOMEX® products are not digestible, they are not attacked by insects, fungi or mold.

Cryogenic capabilities
NOMEX® has found acceptance in a variety of cryogenic applications due to its unique polymeric structure. At the boiling point of nitrogen (77°K), NOMEX® Type 410 paper as well as NOMEX® Type 993 and NOMEX® Type 994 pressboards have tensile strengths in excess of room temperature values.

Moisture insensitivity
In equilibrium at 95 percent relative humidity, densified NOMEX® papers and pressboards maintain 90 percent of their bone-dry dielectric strength while many mechanical properties are actually improved.

Radiation resistance
NOMEX® is essentially unaffected by 800 megarads (8Mgy) of ionizing radiation and still retains useful mechanical and electrical properties after eight times this exposure.

Nontoxic/flame resistance
NOMEX® products will not produce any known toxic reactions in humans or animals. NOMEX® products do not melt and, with a Limiting Oxygen Index (LOI) at 220°C above 20.8 (the critical value for combustion in normal air), they do not support combustion. NOMEX® products fulfilling UL94V-0 requirements are available. A safety information brochure (MSDS) is available upon request.