MIL-DTL-44419A
The test shall run for 2 hours and weight measurements shall be taken at only the start and
completion of the test. Five specimens shall be tested. The specimen shall be sealed in any
manner which prevents wicking and/or leaking of water out of the cup.
7/ A minimum of three specimens shall be tested. Reference ASTM D 1876 with
the following modifications: Specimens (1 inch x 6 inch) shall be cut from palm of insert to
include sealed seam in center of specimen, no conditioning required, tension testing machine head
speed 10 inches/minute, report maximum peeling load only.
8/ One specimen, 8 inches by 12 inches, shall be cut from the sample unit with the eight inch
side in warp direction and one specimen with the eight inch side in the fill direction. The
specimen shall be conditioned at 0 °F for one hour and flexed as specified in ASTM F 392 except
the specimen shall not be aged, the short edges shall not be heat sealed or otherwise joined, and
the specimen shall be flexed for 5,000 cycles. At the end of the flexing, the specimen shall be
removed from the test chamber and conditioned prior to testing for water permeability. Test two
sites for leakage at completion of flex using same conditions and inspection criteria as Footnote 9.
9/ The water permeability shall be tested in accordance with ASTM D 751, Hydrostatic
Resistance, Procedure B, with a fixed hydrostatic head of 50 cm minimum shall be held for
3 minutes minimum, testing (come into contact the water) the side of the sample (insert) facing the
shell. [Please note the insert may be inverted in use; please refer to end item.] Three specimens
minimum shall be tested. The report shall include only measurement of the appearance of the
water droplets. Leakage is defined as the appearance of one or more droplets anywhere within the
3-1/2 inch minimum diameter test area. In order to use Suter Hydrostat tester after abrasion, one
will have to fabricate a specimen holder with 3-1/2 inch minimum diameter.
10/ Test one sample, 14 inches x full width (28" minimum). Specimen shall be agitated using
the "normal" cycle in an automatic home laundering machine except that the machine shall be
capable of continuous agitation [AATCC Test Method 135, without soap. The water level shall be
maintained at 16 (+ 0.5) gallons and water temperature shall be 32 (+-9) °C. Additional fabric
shall be added to create a load of 2 (+ 0.2) pounds.] Upon completion, the specimen shall be air
dried prior to testing for leakage in accordance with Footnote 9.
11/ Test five samples. ASTM D 751 (Hydrostatic Resistance Procedure A1). No restraining or
supporting fabrics are to be used during the testing. Test the side of the sample (insert) facing the
shell. [Please note the insert may be inverted in use; please refer to end item.]
12/ Test 5 samples using exposure Procedure C. Expose shell side of laminate. Surrogate
gasoline Fuel C as defined by ASTM D 471.
13/ Test 5 samples abrading the side of insert facing shell. The abrasion test shall be conducted
in the multidirectional mode using 0 grit emery paper as the abradant. Use a solid rubber
diaphragm without electrical contact (grounding) pin. The diaphragm shall have a smooth surface
without bumps. Use diaphragm inflated to 4 + 0.25 psi. A load of 1 lb. shall be applied to the
abradant. The test mode shall be 100 double strokes per revolution. Do not change the abradant
paper. Once abrasion is complete, specimens shall be tested using Water permeability test method
as described in Footnote 8.
21
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business