DuPont™
Kapton®
Type VN Specifications
Kapton® Type VN is the same tough polyimide film as Type HN Film,
exhibiting an excellent balance of physical, chemical, and electrical
properties over a wide temperature range, with superior dimensional
stability at elevated temperatures. This product is available in 50
(12.7 µm), 75 (19.1 µm), 100 (25.4 µm), 200 (50.8 µm), 300 (76.2 µm),
and 500 (127 µm) gauges.
Kapton® is certified to meet the requirements of the military
specification MIL-P-46112 B and ASTM D-5213-99 in addition to the items
covered by this specifications bulletin. Written confirmation is
available with each delivery upon request.
The thermal durability of Kapton® film depends on the environmental
conditions under which it is aged and tested. Its lifetime depends on
the criterion of failure. Kapton® is routinely tested at the
manufacturing site in the following manner:
Sheets of film 8.5. x 11. (216 mm x 279 mm) are freely suspended in
an oven at a temperature of 400°C ±2°C (752°F ±3.6°F), monitored with a
thermocouple to ensure accuracy. Sheets are removed after 2 hr (1 hr for
30 [7.6 µm] and 50 [12.7 µm] gauge film) and tested on an Instron
Tensile Tester as described in Table 2. The elongation of the film at
23.5°C (74.3°F) should not be less than 10% after this aging at 400°C
(752°F). This conforms to MIL-P-46112B "Elongation After Aging at 400°C"
test (paragraph 4.4.5) and "Elongation, Percent, After Two Hour 400°C"
requirement (Table 2).
In addition, Kapton® conforms to ASTM D-5213-95, Standard
Specification for Polymeric Resin Film for Electrical Insulation and
Dielectric Applications.
Underwriters Laboratories, Inc. lists a thermal index of 200 to 220°C
(392 to 428°F) (depending on gauge and type) for mechanical properties
and 220 to 240°C (428 to 464°F) (depending on gauge and type) for
electrical properties, under their file number E39505 for Kapton®
polyimide film.
Table 5
Shrinkage of Kapton® Type VN Polyimide Film
| Property |
Property
Value Film Thickness, mil (µm) |
| 0.50 (12.7) |
1.00 (25.4) |
2.00 (50.8) |
3.00 (76.2) |
5.00 (127) |
Shrinkage, %, MD and TD
at 200°C (392°F), max. |
0.10 |
0.10 |
0.10 |
0.10 |
0.10 |
Test Method
The percent shrinkage obtained for either the MD or TD by
using the average of three measurements in either direction
before and after conditioning. Temperature exposure 200°C ±
2°C (392°F ± 3.6°F) for 1 hr. Measurements must be made at
the same temperature and humidity conditions before and
after conditioning. To ensure sample/ambient equilibrium
before and after conditioning, specimens should be exposed
for 3 hr. |
Kapton® Type HN and Type VN films are polyimide polymers in the
form of a film.
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) |
| 50VN |
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 |
| 100VN |
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 |
| 200VN |
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 |
| 300VN |
3.00 (76.2) |
2.72 (69.1) |
3.28 (83.3) |
3/16 (4.8) |
50 (1270) |
101.9 |
115.4 |
45 |
9.2 |
| 500VN |
5.00 (127) |
4.65 (118) |
5.35 (136) |
3/16 (4.8) |
50 (1270) |
169.5 |
192.5 |
27 |
5.5 |
| 400FN022 |
4.00 (102) |
3.50 (88.9) |
4.50 (114) |
3/16 (4.8) |
44 (1118) |
163.0 |
200.0 |
27 |
5.5 |
| 500FN131 |
5.00 (127) |
4.50 (114) |
5.50 (140) |
3/16 (4.8) |
44 (1118) |
195.0 |
239.0 |
23 |
4.7 |
*Reference: ASTM D-374-94, Method A, C, or D.
The information give herein is based on data believed
to be reliable, but DuPont makes no warranties express or implied as to
its accuracy and assumes no liability arising out of its use by others.
This publication is not to be taken as a license to operate under, or
recommendation to infringe, any patent.
Caution: Do not use in medical applications involving
permanent implantation in the human body. For other medical
applications, see "DuPont Medical Caution Statement", H-50102. |
