MIL-PRF-121G
TABLE III. Test methods.
SPECIAL REQUIREMENT
FED-STD-101 TEST
TAPPI TEST
OR EXCEPTION
TESTS
METHOD NO.
METHOD NO.
NOTE
Oil Resistance
3015
--
1/
Water resistance of markings
3027
--
2/
Puncture resistance
2065
--
3/
Blocking resistance
3003
--
--
Procedure D
Resistance to curl
2015
--
4/
Contact corrosivity
3005
--
5/
Tensile breaking strength
--
T404
--
Tearing resistance
--
T414
6/
Bursting Strength
--
T403
--
1/ Only oil conforming to ASTM Oil Number 3, as specified in ASTM-D471, and a
di-2-ethylhexyl sebacate synthetic oil shall both be used. Test shall be conducted on three as
received specimens and three specimens taken from material aged in accordance with 4.6.2.
2/ Three specimens shall be tested; each one containing a complete set of markings selected
from different rows of markings.
3/ Test shall be run on five specimens. The heat-sealable face of the barrier material shall be in
contact with the probe. The average value for the five specimens tested shall meet the
requirements listed in table I. Elongation test data is not required.
4/ Three specimens shall be tested. Specimens shall not be suspended but shall be placed on a
horizontal test surface for 24 hours.
5/ Three specimens shall be tested. If corrosion is evident in the blank area, the test shall be
repeated with a new test panel. Corrosion in the intermediate area shall not invalidate the test
nor be cause for rejection.
6/ Five of the ten specimens in each direction shall be tested with one face toward the knife and
the remaining specimens shall be tested with the opposite face toward the knife.
4.6.2 Seam strength.
4.6.2.1 Seam strength sampling. Samples measuring 6 by 12 inches shall be selected from
the test material as shown on figure 1.
4.6.2.2 Seam strength as received.
4.6.2.2.1 Preparation of test specimen. 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 folded length shall be cut off 1/2 inch from the
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