A-A-55126B
3.7 Finish. All hook and loop fastener tapes shall be stabilized as necessary to allow for
maximum flatness and dimensional stability. In addition, the back of each Class 1, 3, 4 and 5
hook fastener tapes shall be coated with a polymeric or elastomeric undercoating. The Class 2
hook and Class 2 loop fastener tape shall be coated with a flame retardant coating. The coatings
shall be cured. This requirement does not apply to Type III and IV hook tapes.
3.8 Special adhesive backings. When a special adhesive backing is specified, the fastener tapes
shall be coated with an adhesive backing (except for selvages). Adhesive backed products shall
not be evaluated for fray, stitch tear, and colorfastness (see 7.4).
3.9 Splicing. When spliced tape is furnished, care shall be taken to assure that splices are
smooth and properly aligned with edges to allow free passage through automatic sewing
equipment. The spliced area shall not affect the functional characteristics of the hook and loop
tapes. The sealed splices shall have no loose edges. The breaking strength of the splice shall be
not less than 30 percent of the minimum specified for the unspliced tape when tested in
accordance with Table VII except that the jaws shall be 1 inch by 3 inches. The length of the
overlap of the splices shall be 5/16 to 5/8 inch. When splices are tested for breaking strength, the
splice shall be centered between the jaws. When spliced tape is furnished as a component in an
end item, the limits of its applications shall be outlined in the end item document.
3.10 Fray resistance. Unless otherwise specified by the contract or purchase order or end item
document, all hook and loop fastener tapes (except the Type IV, Class 4 hook fastener tape) shall
exhibit resistance to fraying when tested as specified below.
3.10.1 Fray resistance for general purpose. Five specimens each of the hook and loop fastener
tapes shall be tested in accordance with AATCC 135 Option 3, V, Aiii for fray resistance after 3
launderings, and in accordance with AATCC 132 for fray resistance after one dry cleaning or
commercial dry cleaning using perchloroethylene (if required by contract). Specimens shall be 10
inches long and full width and shall be prepared for testing by slitting lengthwise up the middle for
a distance of 8 inches. After laundering or dry cleaning, or when tapes with slit selvages are
furnished, the slit edges shall also be examined for fraying. The hook and loop fastener tapes shall
show no more than 1/32 inch fraying after laundering or dry cleaning (when applicable). In
addition, ultrasonically slit fastener tapes shall be tested for fraying.
3.10.2 Fray resistance for Universal Camouflage Shades. No hook or loop fastener tape shall
exhibit any fraying edges, peeling yarns, or damaged appearance that detracts from the appearance
and durability of tape when tested as specified below unless otherwise specified in the contract or
purchase order (see 7.3.4).
3.10.2.1 Fray test procedure. This procedure shall be used to fabricate one set of fray pad test
samples to evaluate the fray resistance of a hook and loop fastener tape.
3.10.2.1.1 Assembly of Fray Test Pad. A fray pad set consists of two pad samples: one pad
sample consists of hook fastener tape pieces on both sides of the fabric outer surfaces and the
other pad sample consists of loop fastener tape pieces on both sides of the fabric outer surfaces.
Use Table V, Fray Test Pad Assembly Procedures and Table VI, Hook and Loop Tape Test Pieces
for pad preparation (see Figures 1, 2, and 3).
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