MMM-A-1617B
pitted, scratched or discolored.
b. Stir adhesive thoroughly. Follow the manufacturer's instructions for
number of coats (not to exceed three on each surface); drying time
between coats and drying time between application of final coat, and
assembly shall be followed without deviation. Unless otherwise stated,
the final coating shall be applied to each surface at as nearly the same
time as possible.
c. Roll out bonded areas with a roller having a diameter and a width of
approximately 5 cm (2 inches).
4.6
Test methods.
*
4.6.1 Visual examination. Every adhesive test specimen shall be
visually examined after testing for deterioration of the test substrates which
may be attributed solely to contact with the adhesive. There shall be no
visible deterioration of the test substrates.
4.6.2
Strip adhesion strength.
4.6.2.1
Panel preparation.
4.6.2.1.1 Panel materials.
Materials used in the preparation of test
panels shall be as follows:
a. Aluminum in accordance with QQ-A-250/13
b. Cotton duck in accordance with CCC-C-419, Type I, olive drab QM shade 7,
hard texture No. 10, 14.35 ounces.
c. Polychloroprene formulated and prepared in accordance with table III.
d. Vinyl plastic formulated and prepared in accordance with table III.
TABLE III.
Polychloroprene and vinyl sheet composition.
Material
Quantity (parts by weight)
Polychloroprene 1/ 3/
Vinyl plastic 2/ 3/
Polychloroprene
Vinyl plastic
Neoprene WRT
Geon 101
100.0
100.0
Stearic acid
Diocytl Phthalate
1.0
15.0
Magnesia (X.L.C)
Tri-Butoxy-ethyl-
4.0
10.0
phosphate
Zinc oxide
TP-90-B
5.0
15.0
Neozone A
Stabelan "E"
2.0
4.0
Permalux
Stearic acid
0.5
0.5
SRF black
45.0
1/ 0.19 ± 0.03 cm (0.75 ± 0.010-inch)-thick sheet
2/ 0.064 ± 0.013 cm (0.025 ± 0.005-inch) - thick sheet
3/ Cure for 20 minutes at 154 ± 2°C (310 ± 3°F) with lightweight cotton
cloth conforming to MIL-C-5646 as reinforcement-backing to prevent
elongation.
4.6.2.1.2
Specimen preparation.
All specimens except those used for
8
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