MIL-DTL-22759/91A
Life cycle: 500 hours at 230°C ± 2°C (446°F ± 3.6°F). Dielectric test, 2500 volts (rms), 60 Hz. Use mandrels
coated with polytetrafluoroethylene such that the diameter of the mandrels, after coating, still conform to the
required test mandrels diameters of table VI. After oven exposure, layers shall not separate and or tapes shall not
lift along the insulation or at the ends.
Low temperature (cold bend): Use mandrels and weights specified in Table VI. Chamber temperature , -65°C ±
2°C (-85°F ± 3.6 F). Dielectric test, 2500 volts (rms), 60 Hz.
Shrinkage: 0.091 inch (max.) at 230°C ± 2°C (554°F ± 3.6°F).
Smoke: 200°C ± 5°C (392°F ± 9°F); no visible smoke.
Solderability: Required.
Strippability: (Group II quality conformance test). Test size 26 - 14 wire only in accordance with ASTM D 3032
section 27. The length of the insulation slugs shall be 0.25 inches. The strip force shall be as follows. There shall be
no evidence of insulation left on the conductor when viewed with the naked eye.
Wire Size
Min. Force
Max. Force
26-20
0.25 lbs.
6.0 lbs.
18-14
0.50 lbs.
7.0 lbs.
Tape Overlap: In accordance with MIL-STD-2223, method 6005.
Tensile Modulus: Test composite film in accordance with ASTM D 882 Method A
Thermal index: 200°C (392°F) minimum for 10,000 hours (Test required for initial qualification only). Test size
20 only in accordance with ASTM D 3032, Section 14.
Thermal shock resistance: Oven temperature, 200°C ± 2°C (392°F ± 3.6°F), Maximum change in measurement ,
0.091 inches. No cracking.
UV Laser Marking: (Test required for initial qualification only) FP materials shall be formulated in such a manner
to achieve a 62 % minimum contrast level when marked by an Ultraviolet (UV) laser source operating at a delivered
power not to exceed 1.5 Joules/cm2. The contrast level is defined as
CL = (Reflectance of the background insulation - Reflectance of the laser mark) x 100
Reflectance of the background insulation
Wrap (mandrel wrap): No cracking, no dielectric breakdown. Use mandrels specified in Table VI. Dielectric test,
2500 volts (rms), 60 Hz.
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