MIL-DTL-83196C(USAF)
3.
REQUIREMENTS
3.1
First article. When specified (see 6.2), a sample shall be subjected to first article
inspection in accordance with 4.2.
3.2
Materials.
3.2.1 Basic fabric. The basic integral fabric shall comprise of a layer of oriented, high loft,
continuous filament nylon yarns (nylon filler) sandwiched between linked layers of knitted cotton
(see figure 1). The color of the nylon fibers shall be white or natural. The color of the knitted
cotton shall be sage green and approximate USAF color shade No. 1509 (see 6.3). The nylon
yarns shall be introduced evenly and in sufficient numbers between the tie stitches of the two
layers of knitted cotton in such a manner that the length is in the direction of the greatest stretch
and to meet the required thickness over the full width of the fabric. The finished fabric shall
present a smooth (unpuckered) surface on both sides and shall conform to the requirements
specified in table I.
TABLE I. Basic fabric.
Characteristics
Requirement
Total weight, ounces per square yard
Minimum
20
Maximum
23
Knited cotton weight, ounces per square yard
Minimum
11
Maximum
12
Nylon filler weight, ounces per square yard
Minimum
9
Maximum
11
Thermal conductivity when compressed 25%
0.0474 to 0.0478
Thickness
Uncompressed, inch
0.25 ± 0.01
Compressed (percent of uncompressed), minimum
80
Elongation, percent 1/
Wales
35
Courses
70
Air permeability, cubic feet per square foot per
100
minute, minimum
Width, inches
32 ± 1
1/ Minimum stretch at 1/3 maximum tensile load.
3.2.1.1 Nylon yarns. The nylon filler shall be delustered nylon yarns. The nylon yarns before
crimping or texturing shall be 2 ply, 80 to 180 denier with a maximum filament size of 7 denier
per filament. The nylon yarn shall be one of the following types:
a.
A yarn with a pronounced crimp pattern of 4/64 ± 1/64 inch in height and 14 to 16
crimps per inch.
b.
A yarn, having a minimum elongation of 300%, in a random crimp pattern, a fiber
entanglement pattern, or a combination random crimp and fiber entanglement pattern.
4
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