Physical Properties of KAPTON®
KAPTON® polyimide films retain their physical properties over a wide temperature range. They have been used in field applications where the environmental temperatures were as low as -269°C (-452°F) and as high as 400°C (752°F).
Complete data are not available at these extreme conditions, and the majority of technical data presented in this section falls in the 23° to 200°C (73° to 392°F) range.
| Physical Property | 23°C (73°F) | 200°C (392°F) | Test Method |
|---|---|---|---|
| Ultimate Tensile Strength, MPa (psi) | 231 (33,500) | 139 (20,000) | ASTM D-882-91, Method A |
| Yield Point at 3% MPa (psi) | 69 (10,000) | 41 (6,000) | ASTM D-882-91 |
| Stress to Produce 5% Elongation, MPa (psi) | 90 (13,000) | 61 (9,000) | ASTM D-882-91 |
| Ultimate Elongation, % | 72 | 83 | ASTM D-882-91 |
| Tensile Modulus, GPa (psi) | 2.5 (370,000) | 2.0 (290,000) | ASTM D-882-91 |
| Impact Strength, N-cm (ft. lb) | 78 (0.58) | DuPont Pneumatic Impact Test | |
| Folding Endurance (MIT), cycles | 285,000 | ASTM D-2176-89 | |
| Tear Strength: Propagating (Elmendorf), N (lbf) |
0.07 (0.02) | ASTM D-1922-89 | |
| Tear Strength: Initial (Graves), N (lbf) |
7.2 (1.6) | ASTM D-1004-90 | |
| Density, g/cc or g/mL | 1.42 | ASTM D-1505-90 | |
| Coefficient of Friction: Kinetic (Film-to-Film) |
0.48 | ASTM D-1894-90 | |
| Coefficient of Friction: Static (Film-to-Film) |
0.63 | ASTM D-1894-90 | |
| Refractive Index (Sodium D Line) | 1.70 | ASTM D-542-90 | |
| Poisson's Ration | 0.34 | Avg. Three Samples Elongated at 5%, 7%, 10% | |
| Low Temperature Flex Life | Pass | IPC TM 650, Method 2.6.18 |
| Thermal Property | Typical Value | Test Condition | Test Method |
|---|---|---|---|
| Melting Point | None | None | ASTM E-794-85 (1989) |
| Thermal Coefficient of Linear Expansion | 20 ppm/°C | -14 to 38°C | ASTMD-696-91 |
| Coefficient of Thermal Conductivity, W/m.K cal | 0.12 | (7 to 100°F) | ASTM F-433-77 (1987) |
| cm.sec.°C | 2.87 x 10 -4 | 296 K | Differential Calorimetry |
| Specific Heat, J/g.K (cal/g.°C) | 1.09 (0.261) | 23°C | UL-94 (2-8-85) |
| Flammability | 94V-0 | ||
| Shrinkage, % | 0.17 | 30 min at 140°C | IPC TM 650, Method 2.2.4A |
| Shrinkage, % | 1.25 | 120 min at 400°C | ASTM D-5214-91 |
| Heat Sealability | Not Heat Sealable | ASTM D-2863-87 | |
| Limiting Oxygen Index, % | 37 | IPC TM 650, Method 2.2.13A | |
| Solder Float | Pass | NBS | |
| Smoke Generation | DM=<1 | Smoke Chamber | NFPA-258 |
| Film gauge | Typical Value | Test Condition | Test Method |
|---|---|---|---|
| Dielectric Strength: 25 μm (1 mil) |
303 V/μm 7700 V/mil |
60 Hz 1/4 in electrodes 500 V/sec rise |
ASTM D-149-81 |
| Dielectric Strength: 50 μm (2 mil) |
240 V/μm 6100 V/mil |
60 Hz 1/4 in electrodes 500 V/sec rise |
ASTM D-149-81 |
| Dielectric Strength: 75 μm (3 mil) |
205 V/μm 5200 V/mil |
60 Hz 1/4 in electrodes 500 V/sec rise |
ASTM D-149-81 |
| Dielectric Strength: 125 μm (5 mil) |
154 V/μm 3900 V/mil |
60 Hz 1/4 in electrodes 500 V/sec rise |
ASTM D-149-81 |
| Dielectric Constant: 25 μm (1 mil) |
3.4 | 1kHz | ASTM D-150-81 |
| Dielectric Constant: 50 μm (2 mil) |
3.4 | 1kHz | ASTM D-150-81 |
| Dielectric Constant: 75 μm (3 mil) |
3.5 | 1kHz | ASTM D-150-81 |
| Dielectric Constant: 125 μm (5 mil) |
3.5 | 1kHz | ASTM D-150-81 |
| Dissipation Factor: 25 μm (1 mil) |
0.0018 | 1kHz | ASTM D-150-81 |
| Dissipation Factor: 50 μm (2 mil) |
0.0020 | 1kHz | ASTM D-150-81 |
| Dissipation Factor: 75 μm (3 mil) |
0.0020 | 1kHz | ASTM D-150-81 |
| Dissipation Factor: 125 μm (5 mil) |
0.0026 | 1kHz | ASTM D-150-81 |
| Volume Resistivity: 25 μm (1 mil) |
1.5 x 1017 Ω•cm | ASTM D-257-78 (1983) | |
| Volume Resistivity: 50 μm (2 mil) |
1.5 x 1017 Ω•cm | ASTM D-257-78 (1983) | |
| Volume Resistivity: 75 μm (3 mil) |
1.4 x 1017 Ω•cm | ASTM D-257-78 (1983) | |
| Volume Resistivity: 125 μm (5 mil) |
1.0 x 1017 Ω•cm | ASTM D-257-78 (1983) |
| Property | Typical Value (25 μm [1 mil] ) | Test Condition | Test Method | |
|---|---|---|---|---|
| % Tensile retained | % Elongation Retained | |||
| Chemical Resistance: Isopropanol |
96 | 94 | 10 min at 23°C | IPC TM-650 Method 2.3.2B |
| Chemical Resistance: Toluene |
99 | 91 | 10 min at 23°C | IPC TM-650 Method 2.3.2B |
| Chemical Resistance: MEK |
99 | 90 | 10 min at 23°C | IPC TM-650 Method 2.3.2B |
| Chemical Resistance: Methylene Chloride / Trichloroethylene (50/50) |
98 | 85 | 10 min at 23°C | IPC TM-650 Method 2.3.2B |
| Chemical Resistance: 2NHCl |
98 | 89 | 10 min at 23°C | IPC TM-650 Method 2.3.2B |
| Chemical Resistance: 2N NnOH |
82 | 54 | 10 min at 23°C | IPC TM-650 Method 2.3.2B |
| Fungus Resistance | Nonnutrient | IPC TM-650 Method 2.6.1 | ||
| Moisture Absorbtion | 1.8% Types HN and VN | 50% Relative Humidity at 23°C | ASTM D-570-81 | |
| 2.8% Types HN and VN | Immersion for 24 h at 23°C (73°F) | ASTM D-570-81 | ||
| Hygroscopic Coefficient of Expansion | 22 ppm / % RH | 23°C (73°F), 20-80% Relative Humidity | ||
| Permeability of Gas: Carbon Dioxide |
45 cc/(100 in2•24 h•atm) | 23°C (73°F), 50% Relative Humidity | ASTM D-1434-82 | |
| Permeability of Gas: Oxygen |
25 cc/(100 in2•24 h•atm) | 23°C (73°F), 50% Relative Humidity | ASTM D-1434-82 | |
| Permeability of Gas: Hydrogen |
250 cc/(100 in2•24 h•atm) | 23°C (73°F), 50% Relative Humidity | ASTM D-1434-82 | |
| Permeability of Gas: Nitrogen |
6 cc/(100 in2•24 h•atm) | 23°C (73°F), 50% Relative Humidity | ASTM D-1434-82 | |
| Permeability of Gas: Helium |
415 cc/(100 in2•24 h•atm) | 23°C (73°F), 50% Relative Humidity | ASTM D-1434-82 | |
| Permeability of Vapor: Water |
54 m2•24 h | 3.5 g/(100 in2•24 h) | 23°C (73°F), 50% Relative Humidity | ASTM E-98-80 |
| Property | Typical Value (25 μm [1 mil] ) | Test Condition | Test Method | |
|---|---|---|---|---|
| % Tensile retained | % Elongation Retained | |||
| Gamma (Savannah River) | Still Flexible (180° Hand) | Exposure: 16 x 107 Gy |
||
| Electron (Van de Graaf) | Retains 50% of Original Elongation | Exposure: 6 x 107 Gy |
||
| Neutron Plus Gamma (Brookhaven) | Darkened but Tough | Exposure: 108 Gy |
||
| Property | 120FN616 | 150FN019 | 250FN029 |
|---|---|---|---|
| Dielectric Strength, V/μm (V/mil) | 272 (6900) | 197 (5000) | 197 (5000) |
| Dielectric Constant | 3.1 | 2.7 | 3.0 |
| Dissipation Factor | 0.0015 | 0.0013 | 0.0013 |
| Volume Resistivity, Ω•cm at 23°C (73°F) | 1.4 x 1017 | 2.3 x 1017 | 1.9 x 1017 |
| Volume Resistivity, Ω•cm at 200°C (392°F) | 4.4 x 1014 | 3.6 x 1014 | 3.7 x 1014 |
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