Dupont Nomex Paper

DuPont NOMEX insulating paper is made of two types of aromatic polyamide polymers, which have the functions of insulation, shielding and anti-interference, provide high electrical insulation, mechanical strength, softness and elasticity, and are especially resistant to acids and alkalis Corrosion-resistant, tear-resistant and wear-resistant, insensitive to moisture, non-toxic, flame-resistant, with strong inherent dielectric strength, mechanical toughness, flexibility and resilience, and good thermal stability.

1. Inherent dielectric strength
The calendered Nomex insulating paper products can withstand the short-term voltage field strength of 18~40KV/mm, without further treatment with varnish and resin; because of the low dielectric constant of NOMEX products, the insulation and cooling medium The electric field distribution is more uniform;
2. Mechanical toughness
Calendered NOMEX insulating paper has very high strength, good elasticity, tear resistance and abrasion resistance, and thinner products have flexibility;
3. Thermal stability
NOMEX insulating paper has the approval of UL material temperature grade 220°C, which means that it can maintain effective performance for more than 10 years even if it is continuously placed at 220°C;
4. Chemical Compatibility
NOMEX insulating paper is basically not affected by most solvents, and is very resistant to acid and alkali corrosion. It is readily compatible with all varnishes, adhesives, transformer fluids, lubricants and refrigerants. In addition, NOMEX insulating paper will not be damaged by insects, fungi and molds;
5. Low temperature performance
At the boiling point of nitrogen (77K), the tensile strength of NOMEX insulating paper T410 and NOMEX993, 994 type laminates exceeds the strength value at room temperature;
6. Not sensitive to moisture
When NOMEX insulating paper is wet at 95%, its dielectric strength is 90% of that in a completely dry state. At the same time, many mechanical properties have actually been improved;
7. Radiation resistance
Even if the intensity of ionizing radiation reaches 800 Mrad (8 MGy), NOMEX insulating paper is basically not affected, and it still maintains its mechanical and electrical properties after 8 times of radiation of this dose;
8. Non-toxic/flame resistant
NOMEX insulating paper will not produce any known toxic reactions to humans or animals. NOMEX insulating paper does not melt in the air and does not support combustion. And its limiting oxygen index (LOI) is greater than 20.8 at 220°C (generally the combustion criticality of empty air) value), so it will not burn. Nomex insulating paper meets the flame resistance requirements specified in UL94V-0.

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