Nomex®/Mylar® insulating pipes, non-shrinking, class F (155 °C)

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Coiled insulating tube made of multi-layer composite for applications in temperature class F electric motors.

  • Inner diameter from 2.00 mm to 200.00 mm with any wall thickness
  • Robust composite made from DuPont™ Mylar® and Nomex®
  • Suitable for insulation in temperature class F applications with continuous temperatures up to 155 °C.
  • Base material UL

The non-shrinking Mylar®/Nomex® insulating tube is used for robust insulation in electrical applications. It is wound very precisely from a composite of Mylar® and Nomex®. It has a high dielectric strength and mechanical impact resistance and is also suitable for demanding applications. It prevents electrical short circuits in electric motor windings.

Art.-Nr.

Technical data

Outer laminate: DuPont™ Mylar® A polyester film

Electrical properties
Properties of the film Typical value Test condition Test method
Dielectric strength [V] 6400 25 ºC, 50 Hz and 50 mm electrode gap ASTM D 149-64
Film thickness [mm] 0,0254 25 ºC, 7500 V , 150 ºC 5000 V –
Surface resistance [W /Quadrat] 1016 25 ºC, 30 % relative humidity ASTM D 257-78

Physical properties
Properties of the film Typical value Test condition Test method
Tear strength running direction (LR) [Mpa] 200 25 ºC ASTM D 882-80
Elongation at break (LR) [%] 130 25 ºC ASTM D 882-80
Tension for 5% elongation (LR) [Mpa] 105 25 ºC ASTM D 882-80
Moisture absorption less than 8% immersed for 24 h at 25 ºC ASTM D 570-63

Thermal properties
Properties of the film Typical value Test method
Melting point 253-255°C ASTM D 3148-82

 

Inner laminate: DuPont ™ Nomex® 410

Electrical properties
Properties of the film 50 µm 1mil 75 µm

2 mil

 125 µm 3mil Test method
Dielectric strength (AC steep rise) [V/mil] 430 550 680 ASTM D149*
Dielectric constant at 60Hz 1,6 1,6 2,4 ASTM D3426

 

*Complies with IEC 243-1, 9.1 with the exception of the electrode gap of 50 mm.

 

Physical properties
Properties of the film 50 µm 75 µm 125 µm Test method
Weight [g/m2] 41 63 116 ASTM D646
Density [g/cm3] 0,72 0,08 0,13

 

Mechanical properties
Properties of the film 50 µm 75 µm 125 µm Test method
Tear resistance
in running direction (LR) LR [N/cm] 39 65 137 ASTM D828
transverse to running direction (QR) QR 18 32 66
Tear elongation
LR

QR

 [%] 9 11 15 ASTM D828
6 8 12
Tear resistance (Elmendorf)
LR

QR

 [N) 0,8 1,2 3,4 TAPP1-414
1,6 2,3 5,2
Tear resistance
LR

QR

 [N) 11 16 33 TAPP1-414
6 8 17
Shrinkage at 300 ºC
LR

QR

 [%] 2,2 1,1 0,9 ASTM D1004
0,1 0 0

 

Influence of moisture on the properties of DuPont™ Nomex® 410

Electrical properties
Moisture content oven dry 50 % 96 %
DuPont™ Nomex® 410 – 0.25 mm
Dielectric strength [kV/mm]

(AC steep rise) [V/mil]

 33,5

850

 32,1

815

 30,7

780

 ASTM D149
Dielectric constant
at 60 Hz 2,5 2,7 3,2 ASTM D150
at 1 KHz 2,3 2,6 3,1
Loss factor
at 60 Hz 6 x10-3 6 x10-3 11×10-3
at 1 KHz 13×10-3 14×10-3 25×10-3
Contact resistance [W/cm] 6 x 1016 2 x 1016 2 x 1014 ASTM D257

 

Physical properties
DuPont™ Nomex® 410 – 0.08 mm
Moisture content oven dry 50 % 65 % 95 %
Expansion
in running direction (LR) LR

transverse to running direction (QR) QR

 [%] 0 0,4 0,6 0,9
0 0,5 0,8 1,6
Moisture absorption [%] 0 2,9 4,9 7,7

 

Item number:

IRNNMdddd/www/llll Example: IRNNM0100/005/0500 IRNNM = master number 0100 = 1.00 mm diameter 005 = 0.05 mm wall thickness 0500 = 500 mm length

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