MIL-D-87030B(SH)
Three cotton laundering cycles shall be performed on 8 by 6 inch specimens
using 1/4 inch double laminated foam.
The distance between the clamps shall be 2 inches at the start of the test.
Slitting the specimen between the nylon knit and foam to help separate the
fabric from the foam sufficiently to fit the clamps is permissible. The
adhesion shall be tested in the fabric's length (wales) direction and on
one side only of the 1/4 inch foam laminated on both sides.
Specimens 4 by 4 inches shall be placed together fabric side to fabric side.
Cemented seams shall be centered equidistant from the clamps, Breaks
shall be made with the seam at right angles to load direction. The clamps
shall be 1 inch apart at the start of the test and the face of each jaw
shall be not less than 1 by 2 inches. The cemented seam test specimen
shall be rectangular, 2 inches wide by not less than 4 inches long.
The test shall be performed on specially prepared cemented seams,
reinforced seams and fused seams, similar to those made on the end item.
When preparing specimens of the reinforced and fused seams for testing, a
minimum of 1 inch tab shall be left free to facilitate testing for
adhesion strength.
The specimen shall be suspended vertically in the air-oven at 158 ± 2
degrees Fahrenheit (°F) for 7 days. At the conclusion of the aging
interval the specimens shall be cooled at room temperature on a flat
surface and allowed to rest 4 hours before determination of adhesion.
4.6.1.1 Compression set under constant deflection. The circular die used
prepare standard test specimens shall have an inside diameter measurement of
1.129 ± 0.001 inches. Test specimens shall have a 1 square inch surface area
with the top and bottom surfaces parallel to each other. Thickness of test
specimens shall be 1/2 inch. If a 1/2 inch thick specimen is not readily
available, then two 1/4 inch thick specimens may be plied to obtain the required
1/2 inch thickness. The apparatus and procedure shall be the same as that
described in method B of ASTM D 395. The test specimens shall be compressed to
50 percent of their measured original thicknesses. The test shall be run at room
temperature for 22 hours. The load shall be released at the end of the test
period and the thickness measured after 24 hours at room temperature. Thickness
shall be measured as specified in ASTM D 1056. Chromium-plated metal plates are
not required for the apparatus. Any stiff plates that are clean and smooth may
be used.
Calculate the percentage compression set as follows:
4.6.1.2 Shrinkage after accelerated aging. Three
specimens each with a
minimum dimension of 8 by 8 inches shall be measured to
the nearest 1/32 inch
in both length and width by means of a steel rule. The
specimens shall be
days. At the conclusion
suspended vertically in the air oven at 158 ± 2°F for 7
19
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business