MIL-PRF-87895A(USAF)
3.3
Environmental conditions.
3.3.1 Temperature and humidity cycling.
The formulation compound must withstand (show no chipping, cracking, or loss of adhesion)
temperature extremes from 160°F to -65°F, (see 4.5.12).
3.3.2 Thermal shock.
The compound must withstand (show no chipping, cracking, or loss of adhesion) thermal shock
cycling in accordance with MIL-STD-810, Method 503.2.
3.3.3 Stability.
When subjected to vacuum thermal stability test (see 4.5.10) the reactivity of the polymeric
compound with EAK and EALK explosives shall not exceed 2.0 mL of gas over and above that
generated by the controls when the test is conducted at 100 ±.5°C for 48 hours. The
explosives tested shall be in accordance with established EAK and EALK formulation
guidelines.
3.4
Workmanship.
The finished product shall be homogeneous and free of contamination from foreign matter.
4.
VERIFICATION
4.1
Classification of inspections.
The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2
First article inspection.
First article inspection shall be performed on ten pounds of the hot melt compound and one
pound of each ingredient used in formulating the compound when a first article sample is
required (see 3.1). This inspection shall include the examination of 4.5 and the tests of 4.5.1
through 4.5.13.
4.3
Conformance inspection.
Conformance inspection shall include the examination of 4.5 and the tests of 4.5.1 and 4.5.13.
4.4
Examination.
Sample shall be examined for compliance with the requirements specified in 3.2 through 3.3.
4.5
Methods of inspection.
4.5.1 Specific gravity.
The specific gravity of the compound shall be determined by gas pycnometry using a
Quantachrom Pentapycnometer or other suitable gas pycnometer.
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