MIL-DTL-29597C(NAVY)
4.4.7 Adhesive seal strength. The peel adhesion shall be tested in accordance with
ASTM-F88, using a 15 minute dwell prior to testing. After separation, the strips shall be
carefully resealed and the test repeated.
4.4.8. Adhesive seal integrity. The adhesive seal shall be tested as follows. Close the top
of the bag securely using the PSA strip. Clamp the full width of the bottom of the bag, invert the
clamped bag, and suspend it so that the clamps are level and the top of the bag hangs free. Make
a small hole in the side of the bag near the clamps and add enough solution 0.1 percent Aerosol
OT with a small amount of red dye so that the water depth is 2 to 2.5 inches and uniform across
the bag width. After 15 minutes, the bag shall be tested for leakage by lightly touching a white
laboratory tissue to all parts of the sealed area.
4.4.9 Relaxation modulus ratio. Relaxation modulus ratio shall be tested at 70 șC with a
strain of 25 percent using a constant strain rheometer with parallel plate in shear mode. The
relaxation modulus ratio shall be calculated by dividing relaxation modulus at 300 seconds by
the relaxation modulus at 0.1 second.
4.4.10 Adhesive areal weight. The weight of the adhesive shall be not less than 29 and not
greater than 35 grains/24 square inches, when tested as specified in ASTM-D898.
4.4.11 Odor barrier effectiveness.
4.4.11.1 Odor substrates. Three odor substrates (generators) shall be used:
a. Raw salmon fish (aged a minimum of 3 days at room temperature)
b. Raw chicken (aged a minimum of 3 days at room temperature)
c. Milk (aged a minimum of 1 week at room temperature)
4.4.11.2. Sample preparation. Prepare two 3.5 x 3.5-inch bags for each substrate by heat
sealing three sides (bag heat seals shall meet the requirements of table I.) Fold a laboratory grade
tissue (15 by 17 inches) to 2 square inches. Add 0.5 to 1 gram of a substrate to the center of the
folded tissue. Fold the tissue once more to cover the substrate. Place the tissue in the bag and
heat-seal the opening. Place the sealed bag in a one quart laboratory jar. The jar shall be tightly
closed using a foil lined plastic lid.
4.4.11.3 Procedure and evaluation. The closed jars shall be placed in an oven maintained at
95 ± 2 °F (35 ± 1 °C). After 60 days, the jars shall be removed from the oven, each bag shall be
transferred to a clean jar and replaced in the oven, except for the aged milk bag, which shall be
allowed to remain at room temperature. After one hour, observe the odor in one jar for each
substrate by lifting only one side of the lid (keeping the other in contact with the jar) and
immediately placing the nose in the opening. Odor shall be graded as:
0 - No odor
1 - Faint, unobjectionable odor
2 - Moderate odor
3 - Strong odor
The odor of the plastic bag itself shall not be considered objectionable.
8
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business