MIL-PRF-20696F
3.4.3 Mildew resistance. The Class 2 cloth shall be mildew resistant. If plastizers are used
they should be restricted to phospate or pthalate esters for the purpose of providing mildew
resistance (see 4.4.14).
3.5 Back side identification. The back side of the cloth shall be identified by applying a
stamping on that side of the cloth with the word "Back" at the beginning and end of each roll.
The marking shall not show through onto the face side of the cloth.
3.6 Fiber identification. Each roll shall be labeled and ticketed for fiber content in
accordance with the Rules and Regulations Under the Textile Fiber Products Identification
Act.
3.7 Physical requirements. The finished cloth shall conform to the requirements listed in
Table I.
Table I. Requirements
Type I
Type II & IV
Type III
Chara2cteristic
Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 5
Weight Oz/yd (max)
8.0
9.0
10.5
16.0
18.0
18.0
12.0
Breaking Strength, lbs (min)
Initial:
Warp
115
115
115
225
225
225
325
Filling
115
115
115
225
225
225
275
After accelerated weathering:
Warp
92
92
92
180
180
180
260
Filling
92
92
92
180
180
180
220
Tearing Strength, lbs (min)
Warp
12
12
12
45
45
45
20
Filling
10
10
10
38
38
38
20
Stiffness cm (max)(warp only)
At 70oF
10.0
10.0
10.0
14.5
16.5
14.5
--
At 10oF
--
13.0
--
--
22.0
--
--
At -40oF
12.0
--
12.0
20.0
--
20.0
--
Adhesion of coating, lbs/2 inch
10.0
10.0
10.0
15.0
15.0
15.0
12.0
width (min)1/
Blocking, rating (max)
(2)
(2)
(2)
(2)
(2)
(2)
(1)
Resistance to accelerated aging
2/
--
2/
2/
--
2/
2/
Flame Resistance:(max)
After flame (sec)
--
--
--
10
--
--
10
Char length (in)
--
--
--
3.5
--
--
3.5
Flame retardancy
--
3/
--
--
3/
--
3/
Hydrostatic resistance (min)
4/
4/
4/
4/
4/
4/
4/
Initial & after abrasion
Resistance to:
Oil
5/
5/
5/
5/
5/
5/
--
Aromatic hydrocarbons
6/
6/
6/
6/
6/
6/
--
Accelerated weathering
7/
7/
7/
7/
7/
7/
--
Low temperature
--
--
--
--
--
--
6/
8/
High temperature
--
--
--
--
--
--
4
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