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Thermalfilm? and Thermalfilm? MT
Thermalfilm? Polyimide Plastic Films
Thermalfilm? and Thermalfilm? MT are low cost polymide plastic insulating films designed
to be an improved replacement for mica. These insulators have a distinctive amber color and
can be easily recognized and assembled on a production line.
Thermalfilm? MT, made from high performance Kapton? MT material, provides thermal
conductivity nearly 2-5 times greater than standard Thermalfilm?. Both insulators have an
extremely high resistance to flow or thin out under high compressive stresses, particularly at
elevated temperatures. Excellent physical, mechanical and electrical properties remain nearly
constant over a wide range of temperatures and frequencies. They are radiation resistant,
have no melting points, and have no known organic solvents. The polymide plastic film is UL
listed as a component in UL’s publication “Component – Plastic Material” dated September
18, 1969. The UL card number is E39505R, Guide QMFZ2 filed by E. I. du Pont de Nemours
& Co., Inc. Thermalfilm TM is rated 94-V/0.
ORDERING INFORMATION
For standard pre-cut sizes of Thermalfilm TM
and Thermafilm TM MT see page 102.
ELECTRICAL – TYPICAL VALUE @ 25° C
PROPERTY
Dielectric strength
THERMALFILM?
0.03mm (1-mil)
240 x 10 3 volts/mm
THERMALFILM? MT
177.2 x 10 3 volts/mm
(4500 volts/mm)
TEST METHOD
ASTM D149-64
(6,100 volts/mil)
Dielectric constant
Dissipation factor
Volume resistivity
Surface resistivity
3.5
0.002
10 17 ohm-cm
10 16 ohms
4.3
0.002
10 17 ohm-cm
10 16 ohms
ASTM D150-64T
ASTM D150-64T
ASTM D257-61
ASTM D257-61
Corona start voltage 0.025mm (1-mil) 465 volts
465 volts
ASTM D1868-61T
Insulation resistance
100.000 megohm mfds.
100.000 megohm mfds.
Based on 0.05 mfd wound
capacitor using 0.25 mm
(1-mil) Film
PHYSICAL
Material thickness
0.05mm (0.002”)
0.05mm (0.002”)
Ultimate tensile strength (MD)
Bursting strength test (Mullen)
Tear strength – initial
Density
Folding endurance (MIT)
1.72 x 10 8 Pa (25,000 psi)
3.10 x 10 5 Pa (45 psi)
27,559 gm/mm (700 gm/mil)
1.42 gm/cm 3 (88.7 lb/ft 3 )
>10,000 cycles
103 MPa (1500 psi)
0.31 MPa (45 psi)
35,433 gm/mm (900 gm/mil)
1.78 gm/cm 3 (111.1 lb/ft 3 )
>10,000 cycles
ASTM D882-64T
ASTM 0774-63
ASTM D1004-61
ASTM D1505-63T
ASTM D2176-63T
THERMAL
Melting point
NONE
NONE
Zero strength temperature
Cut through temperature
Service temperature
Thermal conductivity
Flammability
815 o C (1499 o F)
435 o C (815 o F)
525 o C (977 o F)
-260 o C to 240 o C
(-436 o F to 464 o F)
0.156W/m o C
(0.09 BTU/hr-ft-oF)
V-0, UL “E” card E39505
815 o C (1499 o F)
435 o C (815 o F)
525 o C (977 o F)
-260 o C to 240 o C
(-436 o F to 464 o F)
0.379 W/m o C
(0.219 BTU/hr-ft- o F)
V-0, UL “E” card E39505
Hot Bar (Du Pont test)
Weighted probe on heated film
(Du Pont test)
Model TC-1000 twin heatmeter
Comparative tester
UL 94
Notes: One mil equals 0.001 inch
Dimensional tolerances are ± 0.38mm (0.015”), hole diameters are ± 0.25mm (0.010”) and angularity is ± 1 1/2° unless otherwise specified.
AMERICA
USA Tel: +1 (603) 224-9988 email: info@aavid.com
ASIA
Singapore Tel: +65 6362 8388 email: sales@aavid.com.sg
www.aavidthermalloy.com
EUROPE
Italy Tel: +39 051 764011 email: sales.it@aavid.com
United Kingdom Tel: +44 1793 401400 email: sales.uk@aavid.com
Taiwan Tel: +886 (2) 2698-9888 email: sales@aavid.com.tw
101
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