MIL-PRF-22191F
TABLE I. Performance requirements Continued.
Types I, II, III
Test Paragraph
Characteristics
Requirements
Reference
Oil resistance (delamination)
No leakage, swelling,
4.6.1
multi-ply materials only
delamination, or
embrittlement
Waterproofness (Type II and Type III only)
No dye penetration
4.6.4
Aging resistance (Multi-ply materials only)
No delamination
4.6.3
Water resistance of marking
Markings are clear and
4.6.1
legible
Marking abrasion resistance
Shall be readable
4.6.5
4.6.6
One year storage stability:
1. Seam strength
No separation
a. As received material sealed & tested at
room temperature (seal separation)
b. Sealed after aging at 160 °F for 12 days
and tested at room temperature (seal
separation)
No leakage, swelling,
2. Oil resistance (delamination). Multi-ply
delamination, or
material only
embrittlement
Read lettering 3 inches
behind material.
Read lettering 3 inches
3. Transparency
behind material
4. Water vapor proof transmission rate after
room temperature flexing
0.02
a. as received (gms/100 sq. in./24 hours)(max)
0.02
b. Aged (gms/100 sq. in./24 hours) (max)
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are
classified as follows:
a. Qualification inspection (see 4.2).
b. Conformance inspection (see 4.3).
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