DuPont Materials for Electrical Insulation Systems

The DuPont Company makes a wide range of materials for electrical insulation that are included in the EIS available to you. These include varnishes, wire enamels, thermoplastic resins used in coil bobbins and encapsulation, aramid papers and pressboard products, and films. Listings below are by (1) the DuPont strategic business unit involved, (2) the type of material used, and (3) the particular brandname used if any. For further information follow the links below.

• DuPont Advanced Fiber Systems
  
  Nomex® Brand Aramid Fiber
  Wherever there’s a need for electrical insulation, there are usually NOMEX® brand products to fill it. In its various forms — primarily papers and pressboards — NOMEX® has the right balance of properties for use in transformers, motors, generators and other electrical equipment. This unique balance of properties has been providing reliability to manufacturers for over 35 years.
  
  NOMEX® is a synthetic aromatic polyamide polymer that provides high levels of electrical, chemical and mechanical integrity, when converted into its various sheet forms. Used properly, NOMEX® products can extend the life of electrical equipment, reduce premature failures and repairs, and act as a safeguard in unforeseen electrical stress situations.
  
  
• DuPont Engineering Polymers
  
  Crastin® PBT Brand Thermoplastic Polyester Resins
  These polybutylene terephthalate polyesters feature excellent processibility, toughness, and good electrical properties. They are used in connectors, coil forms, and other electrical components.
  
  Rynite® PET Brand Thermoplastic Polyester Resins
  Rynite® PET polyethylene terephthalate polyester resins offer an excellent combination of thermal stability, electrical properties, dimensional stability, and stiffness for today's small, more complex electrical and electronic components. Rynite® PET is widely used in coil forms and encapsulation.
  
  Zenite® LCP Brand Liquid Crystal Polymer Resins
  Zenite® LCP resins are aromatic polyester resins with high (335-352°C) [635-666°F] melting points. Features include excellent dimensional stability and creep resistance, even at very high temperatures. Their processibility makes molding surface-mount coil forms with 0.25 mm (10 mil) thick flanges a commercial reality.
  
  Zytel® Brand Nylon (Polyamide) Resins
  Over half of all coil forms used worldwide are unreinforced and glass-reinforced polyamides (nylon) resins, including PA 6, PA 66, and PA 612. Zytel® PA resins are used in transformers, relays, motors, and other coil-form-based electrical components requiring toughness, good elongation, good pin retention capability, and processing ease. Zytel® resins are also widely used as coil encapsulants.
  
  Zytel® HTN Brand High Performance Polyamide Resins
  Zytel® HTN resins are high performance nylon copolymers with a melting point of over 300°C (572°F) and a 90-140°C (194-284°F) glass transition temperature (dry). Zytel® HTN is used in applications requiring high strength and high temperature capabilities.
  
  
• DuPont Packaging and Industrial Products
  
  Kapton® Brand Polyimide Film
  An ultratough polyimide film capable of withstanding extreme temperatures (400°C) [752°F] and pressure. It is impervious to most chemicals. As an insulator, Kapton® has unmatched dielectric properties and remarkable tensile strength, which permit thinner wall construction for increased performance and cost-efficiency.
  
  Mylar® Brand Polyester Film
  This exceptionally strong polyester film offers an unusual balance of chemical, electrical, physical, and thermal properties. Well-suited for many electric, electronic, and industrial uses, Mylar® provides superior interwinding barrier and phase insulation in wire and cable coils.
  
  Kaladex® Brand PEN Film
  Kaladex® films bridge the gap between the price and performance of polyester and polyimide films.
  
  
• DuPont Performance Coatings
  
  Herberts® Electro
  High quality impregnating resins and varnishes and a wide range of potting compounds as wire enamels are available for electrical applications having to meet UL and IEC standards.

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