sheets of dupont nomex laminates NKN and DMD

Nomex Laminates

Nomex laminates have excellent electrical and mechanical strength. The most common types of laminate insulation based on Nomex® paper are NMN and NKN  Custom laminate solutions can be designed to meet performance requirements of specific applications.

Nomex laminate type NMN

Type NMN is a laminate with polyester film and Nomex® paper.  Type NMN laminates made with Nomex® papers are used in UL systems typically up to 180°C. These laminates are broadly used in the production and repair of motors, generators of many sizes and temperature classes.  The most important applications for these laminates are slot liners, wedges and phase insulation in Class H motors and generators, as well as in large and specialty Class F motors.

Nomex laminate type NKN

Type NKN is made by laminating polyimide film with Nomex® paper.  These laminates are typically used in motors and generators that operate in excess of Class H temperature requirements.  There are a number of insulation systems recognized by UL that include these laminates for temperature classes up to and including 220°C.


Nomex paper kapton polyimide laminates

Nomex Kapton NKN

Nomex Kapton (NK and NKN) laminates are duplex and triplex laminates constructed of Dupont NOMEX paper bonded to kapton polyimide film with high temperature adhesive system.

  • Good dielectric properties
  • High heat resistance
  • Thermal endurance and Class H categorization
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What is Nomex?

Nomex is a flame-resistant meta-aramid material. They are produced by condensation reaction from the monomers m-phenylenediamine and isophthaloyl chloride. It is sold in both fiber and sheet forms and is used as a fabric where resistance from heat and flame is required. Nomex sheet is actually a calendered paper and made in a similar fashion. Nomex Type 410 paper was the first Nomex paper developed and one of the higher volume grades made, mostly for electrical insulation purposes.

Where are Nomex laminates used?

Due to its high mechanical and electrical strength, Nomex Laminates are commonly used as wedges or top sticks, phase insulation, a slot liner and slot separator. In industries such as motor production, transformer production and generators.

How Nomex kapton laminates are used in electric motors