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SynTherm® – Insulating Materials

Nomex® 411

Nomex® 411 is a synthetic electrical insulating paper constructed of a non-calendered, aromatic polyamide-fibrid flock composition.

Attributes

Nomex® 411 is a Class H (180 °C) insulating material. Temperatures up to 200 °C have only a slight effect on its electrical properties. The good mechanical properties can be extrapolated at much higher temperatures. Due to the polymer structure, Nomex® 411 can also be used an temperatures as low as -190 °C with good effect. It has a high short-time electric strength. The permanent field strength, however, should not be greater than 1.2 kv/mm. Nomex® 411 is compatible with all classes of standard resins, varnishes, adhesives and transfomer fluids, lubricating oils and coolants. Common solvents can result in easily reversible expansion. Nomex® 411 paper is of low flammability (UL 94V-0); in addition, it has a very high resistance to beta and gamma radiation.

Application

Hoch-quality Nomex®  411 is used in practically all known applications for electrical sheet insulating materials. Applications range from AC and DC motors to large generators, wet and dry transformers and chokes, even with beta and gamma radiation exposure.

Standards
  • Class H (180 °C), insulating material
  • UL listed (Class 220), file no. E 34739
  • RoHS compliant according to 2011/65/EU
Delivery forms

Film thickness in µm:
130, 180, 250, 380, 580

Nomex® 411 can be supplied:

  • in bands: on request, depending on material thickness
  • in rolls: 457 mm or 914 mm

Wrap:

  • depth approx. 1 - 12 mm, distance approx. 1 -10 mm
  • from widths of 10 mm to 240 mm and thickness of 0.25 mm
Base

Uncalendered, aromatic polyamide-fibrid-flock composition.

Technical data
Typical mechanical properties
Nominal thickness  Typical thickness  Specific weight  Density  Tensile strength longitudinal  Tensile strength transversal  Elongation at break longitudinal  Elongation at break transversal  Elmendorf tear strength longitudinal  Elmendorf tear strength transversal 
Unit of measure           Test method 
µm  130 180 250 380 580  
µm  140 200 260 430 660 TAPPI-411
g/m²  42 64 82 134 205 ASTM D-646
g/cm³  0.30 0.31 0.31 0.31 0.31  
N/cm  18 27 35 55 71 ASTM D-828
N/cm  9 14 20 33 47 ASTM D-828
3.6 3.8 3.4 3.7 3.2 ASTM D-828
4.8 5.6 5.2 5.3 3.9 ASTM D-828
1.1 1.6 1.9 4.1 7.4 TAPPI-414
1.5 2.5 2.5 5.8 9.4 TAPPI-414
Typical electrical properties
Nominal thickness  Field intensity  Dielectric constant at 60 Hz  Loss factor at 60 Hz(x10^-3) 
Unit of measure           Test method 
μm  130 180 250 380 580  
kV/mm  9 9 9 9 9 ASTM D-149
  1.2 1.2 1.2 1.3 1.3 ASTM D-150
  3 3 3 3 3 ASTM D-150

Nomex®, Kapton®, KAPTON® are registered trademarks of E.I. Du Pont de Nemours and Company.