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Nomex 414 is electrically and thermally similar to Nomex® 410, but it is manufactured to produce a strong but more flexible and conformable sheet with an open surface.
It is produced in thicknesses ranging from 0.18 mm (7 mil) to 0.38 mm (15 mil), with specific gravities ranging from 0.9 to 1.0.
It is designed for use as slot insulation in hand-wound motors, for linear wrapping of wire, and as main insulation for dry-type transformers where conformability and impregnability are required.

Nomex 414 Features

  • Exceptional thermal stability—Temperatures up to 200°C have little or no effect on the electrical and mechanical properties of Nomex®, and useful values are retained at considerably higher temperatures. What’s more, these useful properties are maintained for at least 10 years of continuous exposure at 220°C.
  • Outstanding mechanical toughness—Densified Nomex® products are strong and resilient with good resistance to tearing and abrasion. Thinner grades are also flexible.
  • Inherent dielectric strength—In densified form, Nomex® withstands short-term electrical stresses of 18 kV/mm (457 mils) to 40 kV/mm (1,015 mils), depending on product type and thickness, with no need for further treatment with varnishes or resins.
  • Broad 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.
  • Excellent flame-resistance—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 414 Applications

  • Large power, medium voltage, and high voltage (>1.2 kV)
  • Medium voltage, general purpose (>1.2 kV)
  • Medium voltage, substation (>1.2 KV)
  • Low voltage, general purpose/specialty (<1.2 kV)
  • HVT/microwave power
  • UPS/data center/converter
  • Lighting ballast
  • Traction
  • Welding
  • Mining
  • Power conversion

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