Kapton® Type HN is a tough, aromatic
polyimide film, exhibiting an excellent balance of physical,
chemical, and electrical properties over a wide temperature
range, particularly at unusually high temperatures.
Chemically, its polyimide polymer makeup is the result of a
polycondensation reaction between pyromellitic dianhydride and
4,4.diaminodiphenyl ether. Kapton® HN is available in the
following gauges: 30 (7.5 µm), 50 (12.7 µm), 100 (25.4 µm),
200 (50.8 µm), 300 (76.2 µm), and 500 (127 µm). Other
gauges, such as 75 (19.1 µm) and 400 (102 µm), are available
by special request.
Table 2 Mechanical Properties of
Kapton®
Type HN Polyimide Film
Property
Property
Value--Film Thickness, mil (µm)
Method
0.30
(7.6)
0.50
(12.7)*
1.00
(25.4)*
2.00
(50.8)*
3.00
(76.2)*
5.00
(127)*
Tensile
Strength, psi (MPa) at 23°C (73°F). Machine
Direction (MD) and Transverse Direction (TD), min.
16,000
(110)
20,000
(138)
24,000
(165)
24,000
(165)
24,000
(165)
24,000
(165)
ASTM
D-882-91, Method A, using an Instron Tensile Tester
(specimen size: 1/2" x 6" [12.7 mm x 152
mm]; jaw separation: 4" [102 mm]; jaw speed:
2"/min [51 mm/min]). Calculate the average of
five specimens based on original measured thickness.
Elongation,
%, MD and TD, min.
25
35
40
45
50
50
Same
as above.
Shrinkage,
%, MD and TD at 400°C (752°F), max.
4.0
4.0
2.5
2.5
2.5
2.5
MIL-P-46112B.
The percent shrinkage is obtained for either the MD
or TD using the average of three measurements in
either direction before and after conditioning.
Prior to measurement, the 8 1/2" x 11"
(216 mm x 279 mm) specimen is conditioned by freely
suspending it for 2 hr** in an oven controlled to
400°C (752°F).
Moisture
Absorption, %, max.
4.0
4.0
4.0
4.0
4.0
4.0
ASTM
D-570-92, using 24-hr immersion at 23°C (73°
Average of three specimens.
* Also applies to
Type VN, except shrinkage, which is shown in Table 5.
** 1 hr for 30 and 50 gauge film
Table 3 Electrical Properties of Kapton®
Type HN Polyimide Film
Property
Property
Value--Film Thickness, mil (µm)
Method
0.30
(7.6)
0.50
(12.7)*
1.00
(25.4)*
2.00
(50.8)*
3.00
(76.2)*
5.00
(127)*
Dielectric
Strength, AC V/mil (kV/mm), min.
3,000
(118)
3,000
(118)
6,000
(236)
5,000
(197)
4,500
(177)
3,000
(118)
ASTM
D-149-94. (Average of ten specimens.) Flat sheets in air
placed between 1/4" (6 mm) diameter brass electrodes with
1/32" (0.8 mm) edge radius subjected to 60 cycles AC
voltage at 500 V/sec rate of rise to the breakdown voltage.
Volume
Resistivity, ohm-cm at 200°C (392°F), min.
1012
1012
1012
1012
1012
1012
ASTM D-257-93
Dielectric
Constant at 1 kHz, max.
4.0
4.0
3.9
3.9
3.9
3.9
ASTM
D-150-94. Use conducting silver paint electrodes, two-terminal
system of measurement at standard conditions. Results are
based on an average of five tests using measured thickness of
specimens.
Dissipation
Factor at 1 kHz, max.
0.0070
0.0050
0.0036
0.0036
0.0036
0.0036
Same as
above.
* Also applies to Type VN
Table 6 Kapton® Polyimide Film
Specifications and Tolerances
