MIL-DTL-484J
TABLE II. Physical requirements
Characteristic
Type I
Type VI
Weight, oz./sq.yd.
Minimum
6.5
5.5
Maximum
7.2
6.7
Yarns per inch, (minimum)
Warp
130
196
Filling
54
86
Breaking strength (pounds), minimum
Warp
135
170
Filling
50
80
Air permeability (cu. ft./min/sq. ft.) 1/
4.0
3.5
Yarn Ply
Warp
1
2
Filling
1
1
1/ After 3 launderings.
3.6 Weave. The weave shall be oxford weave (a plain weave with two warp ends weaving as
one) when tested as specified in 4.4.3. The use of fly shuttle or shuttleless loom is permitted.
3.6.1 Width. For government procurements only, the width of the finished cloth shall be as
specified (see 6.2) and shall be the minimum acceptable width inclusive of the selvage when
woven on fly shuttle looms and exclusive of selvages and fringes when woven on shuttleless
looms.
3.6.2 Stiffness (Type VI only). The maximum flex-stiffness shall be 0.00050 inch-pounds
for the warp and 0.00035 inch-pounds for the filling direction when tested as specified in 4.4.3.
3.7 Finish. The cloth shall be singed, scoured and mercerized; than dyed and given a water
repellent treatment as specified in 3.7.1.
3.7.1 Water repellency. The cloth shall be given a fluorocarbon (Quarpel Type) water
repellent treatment. Testing shall be as specified in 4.4.3.
TABLE III. Water repellency requirements
Hydrostatic pressure
Dynamic absorption (percent)
(centimeter)
Max. lot avg.
Max. 1/
Min. lot avg. 2/ Min.
Spray rating 3/
Initial
25
30
35
30
90, 90, 80
After 3 launderings
(Type I)
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30
25
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After 3 launderings
(Type VI)
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35
30
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After 15
launderings
25
30
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5
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