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Kapton Type HN
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
| Film
Type |
Thickness
Nominal
mil (µm)* |
Thickness
Tolerance |
Width
Range |
Unit
Weight |
Area
Factor |
Min.
mil (µm) |
Max.
mil (µm) |
Min.
in (mm) |
Max.
in (mm) |
Min.
g/m2 |
Max.
g/m2 |
ft2/lb |
(m2/kg) |
| 30HN |
0.30 (7.6) |
0.24 (6.1) |
0.36 (9.1) |
3/16 (4.8) |
52 (1320) |
7.6 |
14.0 |
453 |
92.8 |
| 50HN |
0.50 (12.7) |
0.35 (8.9) |
0.65 (16.5) |
3/16 (4.8) |
52 (1320) |
14.0 |
26.0 |
272 |
55.7 |
| 100HN |
1.00 (25.4) |
0.85 (21.6) |
1.15 (29.2) |
3/16 (4.8) |
52 (1320) |
32.7 |
39.7 |
136 |
27.9 |
| 200HN |
2.00 (50.8) |
1.75 (44.5) |
2.25 (57.2) |
3/16 (4.8) |
52 (1320) |
66.9 |
77.9 |
68 |
13.9 |
| 300HN |
3.00 (76.2) |
2.72 (69.1) |
3.28 (83.3) |
3/16 (4.8) |
52 (1320) |
101.9 |
115.4 |
45 |
9.2 |
| 500HN |
5.00 (127) |
4.65 (118) |
5.35 (136) |
3/16 (4.8) |
52 (1320) |
169.5 |
192.5 |
27 |
5.5 |
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