MIL-PRF-85036B(AS)
4.6.2.2.3 Test at 100 °F. The six 1-inch-wide specimens selected for this test (see 4.6.2.2.1)
shall be tested the same as those specimens tested at room temperature (see 4.6.2.2.2) except that
specimens shall be clamped in a forced draft circulating air oven maintained at 100 ± 2 °F with a
weight of 2 pounds ± 1/2 ounce acting on the free end of the specimen for 1 hour. The rate of air
circulation shall be held to the minimum required to maintain uniform temperature throughout the
oven. In no case shall the rate of air circulation cause any movement of the weighted specimens.
The weights shall be attached after the specimens and test clamp fixtures have been placed in the
oven. The weights shall be removed prior to taking the specimen from the oven in order to avoid
excessive loading due to swaying action. After one hour, the weights shall be removed and the
specimen examined for separation of the heat-seal faces. Any evidence of delamination of one ply
away from the other in the heat-sealed area specified in 4.6.2.2.1 shall be cause for rejection.
4.6.2.2.4 Test at 160 °F. The six 1-inch-wide specimens selected for this test (see 4.6.2.2.1)
shall be tested the same as those at 100 °F (see 4.6.2.2.3) except that the weight shall be
10 ounces ± 1/2 ounce and the temperature in the forced draft circulating air oven shall be
160 ± 2 °F. The rate of air circulation shall be held to the minimum required to maintain uniform
temperature throughout the oven. In no case shall the rate of air circulation cause any movement
of the weighted specimens.
4.6.2.3 Seam strength (sealed before aging).
4.6.2.3.1 Test specimens. The six sections for this test (see figure 1) shall be folded in half
with the crease parallel to the long axis. The open or unfolded length shall be heat-sealed by
clamping in the sealer and simultaneously drawing a sharp penciled line on the backing along the
edge of the sealer jaw. The line shall indicate the actual seam separation. The folded length of
the test section shall then be cut off 1/2 inch from the end. After heat-sealing, the samples shall be
aged in a circulating air oven maintained at 160 ± 2 °F for 12 consecutive days (288 hours). After
aging, 1-inch-wide specimens, as specified in 4.6.2.2.1, shall be cut from the sections for test at
room temperature, 100 °F, and 160 °F.
4.6.2.3.2 Test at room temperature. The six 1-inch-wide specimens selected for this test
(see 4.6.2.3.1) shall be tested as specified in 4.6.2.2.2.
4.6.2.3.3 Test at 100 °F. The six 1-inch-wide specimens selected for this test (see 4.6.2.3.1)
shall be tested as specified in 4.6.2.2.3.
4.6.2.3.4 Test at 160 °F. The six 1-inch-wide specimens selected for this test (see 4.6.2.3.1)
shall be tested as specified in 4.6.2.2.4.
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