Certification
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.
Thermal Durability
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.
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. |
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Kapton® Type HN and Type VN films are polyimide polymers in the form of a film.
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 |
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.
