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