MIL-PRF-44423A
TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY (TAPPI)
(Applications for copies of referenced documents should be addressed to TAPPI Press,
Technology Park/Atlanta, P.O. Box 105113, Atlanta, GA 30348-5113.)
2.4 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein, the text of this document takes precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection (see 4.2 and 6.3).
3.2 Standard sample. The cloth shall match the standard sample for shade and appearance
and shall be equal to or better than the sample for colorfastness (see 6.4).
3.3 Performance requirements. The cloth shall conform to the requirements specified in
Table I and 3.4 through 3.8.
TABLE I. Requirements
Characteristic
Requirements
2 (max)
Weight Oz/yd
7.0
Breaking Strength, lbs./inch width (min):
Warp
175
Filling
150
Tearing Strength, lbs (min):
Warp
5.5
Filling
5.5
Adhesion of coating, lbs/2-inch width (min):
Face side
8.0 1/
Back side
8.0 1/
Water permeability (min):
Initial
No leakage
After cold crack
No leakage
After flexing
No leakage
After weathering
No leakage
Flame resistance:
Initial and after weathering:
After-flame time, seconds (max):
Warp
2.0
Char length, inches (max):
Warp
6.0
Melt drip (min):
Warp
2/
Stiffness, cm: (max):
Initial
10.0
At -20°F:
15.0
Blocking, scale rating (max)
No. 1
3
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