A-A-55077A
TABLE I. Physical requirements for nylon duck, cont'd.
Characteristic
Requirement
Test Method
Colorfastness to:
(minimum)
Accelerated weathering
"good"
AATCC-111A 1/
Crocking
3.5 2/
AATCC-8
Spray rating (min.)
Initially
100, 100, 90
AATCC-22
After 1 laundering
90,90,80
AATCC-96 Test VI,A and
AATCC-22
Hydrostatic resistance
no leakage
ASTM-D751 3/
pH
4.5 8.5
AATCC-81
Dimensional stability (min.)
AATCC-96 Test VI,A
Warp
3.5
Filling
2.5
1/ The time of exposure shall be 40 hours.
2/ Minimum acceptable rating based on the AATCC Chromatic Transference Scale.
3/ Procedure B, Procedure 1: The finished cloth shall show no leakage below a hydrostatic height of 35
centimeters. Leakage is defined as the appearance of water at three or more different places within the
4-1/2 inch diameter test area. The uncoated side of the coated cloth shall contact the water.
2.3.1.1 Toxicity assessment. The finished product must be composed of materials, which have been
safely used commercially during prolonged, direct skin contact. Test methods for toxicity are: Primary
dermal irritation study in laboratory animals (see paragraph 6.1, Acute Dermal Toxicity 870.1200) and
a repeated insult human patch test (Modified Draize Procedure) (see paragraph 6.2, Principles and
Methods of Toxicology). The latter must be conducted under the supervision of a qualified
dermatologist using at least 100 free living individuals.
2.3.2 Nylon webbing. The woven nylon webbing for the shoulder strap, closing strap, handle and
reinforcements shall be 1-23/32 inches wide, Camouflage Green 483, and shall be resin impregnated for
strength. The untreated weight shall be 1.60 ounces per linear yard maximum. The weight after
webbing is resin impregnated shall be the untreated weight plus a maximum of ten percent. The cut ends
of the nylon webbing shall be fused so they are seared smooth.
2.3.3 Thread, polyester. The thread shall be polyester, Camouflage Green 483, constructed of twisted
soft multiple cord or twisted bonded multiple cord, with a nonwicking finish, 4 ply, with a minimum
breaking strength of 10.6 lbs. when tested as specified in ASTM D-2256 (testing speed shall be 12 +
0.5 in./min. and a 10 inch gauge length shall be used). There shall be no lubrication of the thread by any
means prior to or during sewing.
2.3.4 Grommets. The duffel bag shall have 4 plain grommets with plain washers. The grommets and
washers shall be brass with a black chemical finish, size number 5.
2.3.5 Keeper, steel or brass. The keeper shall be either steel or brass. Steel keepers shall be
fabricated from 0.1483 inch nominal diameter, carbon steel wire. The finish of the steel keeper shall
consist of phosphate-treated zinc plate conforming to Type IV, SC3 (severe) of ASTM B633, followed
by baked enameling. The enamel shall be black. The coating shall level out to a uniform continuous dry
film of uniform black color with no objectionable orange peel, wrinkles, drops, streaks, or areas of thin
or no film. Brass keepers shall be fabricated from half-hard brass wire, 0.1443 inch nominal diameter.
Brass keepers shall be given a black chemical finish.
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