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Materials

Thermosets

Nomex is a cryogenic-compatible plastic

Nomex® (Synthetic Aromatic Polyamide Polymer)

  • Excellent heat, chemical and
    radiation resistance
  • High dielectric strength
  • Mechanical stability
  • Moisture-resistant
  • Cryogenic-compatible

Characteristics

Nomex is a heat-resistant insulation that offers an excellent combination of strength, durability and dielectric properties. It is moisture-resistant and cryogenic-compatible with good mechanical stability. Nomex has been widely adopted as electrical insulation for liquid and dry transformers, motors and generators.

Applications

  • Circuit boards
  • Motors
  • Generators
  • Electrical equipment

Questions?

Our application engineers can help. With decades of experience in plastic material selection, we'll help you choose the optimal plastic for your application and budget.

 

To compare
the cost of this material to other thermosets, click here.

General Material Properties

Property   10 mil 12 mil 15 mil   Test Method
             
Nominal Thickness (mm)   0.25 0.30 0.38    
             
Typical Thickness1
ml
mm
 
10.2
0.26

12.2
0.31

15.2
0.39
 
ASTM D-374
             
Basis Weight (g/m2)   249 309 397   ASTM D-646
             
Density (g/cc)   0.96 1.00 1.03    
             
Tensile Strength (N/cm)
MD
XD
 
285
152

378
196

459
252
 
ASTM D-828
             
Elongation (%)
MD
XD
 
19
15

22
17

19
14
 
ASTM D-828
             
Elmendorf Tear (N)
MD
XD
 
6.0
10.8

7.4
14.2

9.5
17.2
 
TAPPI-414
             
Initial Tear2 Strength (N)
MD
XD
 
71
42

93
55

116
74
 
ASTM D-1004
             
Shrinkage at 300°C (%)
MD
XD
 
0.4
0.1

0.4
0.2

0.3
0.2
   

MD = machine direction of paper   XD = cross direction of paper

1 Method D; 17 N/cm2

2 Data presented for Initial Tear Strength is listed in the direction of the sample per ASTM D-1004. The tear is 90 degrees to sample direction - hence for papers with a higher reported MD ITR, the paper will be tougher to tear in the cross direction.

The information on this page is intended as general guidance only and is only accurate at the time of posting (see date below). Specific material properties vary by manufacturer. Please contact a Dielectric application engineer for help in choosing the optimal material for your application and budget.

Posting Date: October 18, 2012