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Page Title:
Table I. Load deflection characteristics requirements (50 square inch indenter foot). |
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|  MIL-S-27332B(USAF)
TABLE I. Load deflection characteristics
requirements (50 square inch indenter foot).
3.5.2 Density.
The density of the polyurethane shall be 1.6 + 0.2 pounds/
cubic feet.
3.5.3 Tensile strength. The tensile strength of the seat cushion insert
material shall have a value of 12 pounds per square inch minimum.
3.5.4 Elongation. The value of the ultimate percent elongation for the
insert material shall be 180 percent minimum.
3.5.5 Compression set.
The percent loss of original height shall be not
more than 15 percent.
3.5.6 Air oven aging. The allowable percent change in load deflection
values after air oven aging shall be + 10 percent maximum,
3.5.7 Humidity aging.
3.5.7.1 After humidity aging, the percent loss of original height shall be
not more than 15 percent.
3.5.7.2 After humidity aging, the percent change in load deflection
characteristics for 25, 50, 65, 75, 80, and 85 percent deflections shall be
not more than 25 percent for the 50 square inch indenter foot test.
3.5.8 Tear resistance. The tear resistance of the insert material shall
be not less than 1.5 pounds per inch for all specimens.
3.6 Identification of product. The following information shall be sten-
ciled on each seat cushion insert in accordance with MIL-STD-130:
a.
Title and number of this specification.
b.
Contract number and date.
c.
Stock number.
d.
Manufacturer's name (if desired, the manufacturer's internal desig-
nations and trade name may be included).
e.
Applicable drawing number.
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