Dupont NOMEX paper insulation is made of two kinds of forms of aromatic polyamide polymer, with insulation, shielding, anti-interference, provide high electrical insulation, mechanical strength, soft and elastic, particularly amenable to acid, alkali corrosion, resistance to tear and wear resistance, is not sensitive to moisture, non-toxic, flame retardant, have very strong intrinsic dielectric strength and mechanical toughness, flexible and elastic back, better thermal stability.Widely used in generators, transformers, electrical equipment, mechanical and electrical appliances.
Dupont NOMEX insulation paper has the following eight characteristics
1. Inherent dielectric strength
The Nomex insulation paper product can withstand 18~40KV/mm short-time voltage field, without further treatment with varnish and resin;Due to the low dielectric constant of NOMEX product, the electric field distribution between insulation and cooling medium is more uniform.
2. Mechanical toughness
The NOMEX insulating paper after pressing is of very high strength and good elasticity, tear resistance and abrasion resistance, while the thinner ones are flexible;
3. Thermal stability
NOMEX insulating paper has the approval of UL material temperature class 220°C, which means it can maintain effective performance for more than 10 years even if continuously placed at 220°C;
"4. Chemical compatibility Dupont NOMEX insulating paper"
NOMEX insulating paper is virtually immune to most solvents and is very acid and alkali resistant.It is easy to be compatible with all the varnishes, binders, transformer fluids, lubricants and cold bitterness.In addition, NOMEX insulating paper will not be damaged by insects, fungi and moulds;
5. Low temperature performance
At the boiling point of nitrogen (77K), the tensile strength of NOMEX insulating paper T410 and NOMEX993 and 994 laminates was above the strength value at room temperature.
6. Not sensitive to moisture
The dielectric strength of NOMEX insulating paper is 90% of that of completely dry paper at 95% phase humidity. At the same time, many mechanical properties are actually improved.
7. Radiation resistant
NOMEX insulating paper is largely unaffected by ionizing radiation up to 800 MLD (8 MGY) and retains its mechanical and electrical properties after eight doses of this radiation;
8. Non-toxic/fire resistant
NOMEX paper does not cause any known toxic reaction to humans or animals. NOMEX paper does not melt in air, does not contribute to combustion, and does not burn because its oxygen limiting index (LOI) is greater than 20.8 at 220°C (the general empty combustion threshold).Nomex insulating paper meets the fire resistance requirements specified in UL94V-0.