MIL-DTL-81736B(AS)
3.1.1.4 Adulterants. The Nylon fiber and yarn shall be free of any chemicals specifically
used to increase fiber or yarn diameters (see 6.2h and 6.5). This requirement is not applicable to
the manufacturer's colored identification yarns
3.1.1.5 Yarn properties. The yarn shall meet the physical property requirements of table I
when tested as specified in table III (see 6.2h and 6.5). This requirement is not applicable to the
manufacturer's colored identification yarns.
TABLE I. Nylon 6,6 yarn physical properties.
CHARACTERISTIC
REQUIREMENT
YARN SIZE
840 Denier
1260 Denier 2520 Denier
Elongation @ 10 lbs, %
9.6 + 1.0
8.2 + 1.0
-----
≥ 8.7
≥ 8.7
≥ 8.7
Tenacity, G/Denier
Finish on yarn, %
0.85 + 0.4
0.85 + 0.4
0.85 + 0.4
Shrinkage, %
7.0 + 1.6
6.2 + 1.6
5.6 + 2.5
Denier, Denier
840 + 32
1260 + 44
2520 + 100
3.1.1.6 Yarn breaking strength. When tensile tested (see table III), the breaking strength of
the nylon yarn used in the manufacture of arresting tapes shall meet the requirements specified in
ASTM D2256, Option A, Single Unplied Yarns, Condition 1 Ambient Air (see 6.2h, 6.5 and
6.6). Each manufacturer whose yarn is used in arresting tape production shall meet this
requirement. This requirement is not applicable to the manufacturer's colored identification
yarns.
3.1.1.7 Yarn size and ply. Yarns of different denier or ply shall not be intermixed within
the binder, stuffer, or ground components of the tape. The stuffer and ground shall have the
same denier and ply; however, the denier and ply may vary among the binder and ground (see
6.2h and 6.5). For example: the specification permits the use of 840 or 1260 denier yarn for the
ground; using both deniers within the ground is not permitted; however, 840 denier yarn can be
used for the binder and 1260 for the ground. This requirement is not applicable to the
manufacturer's colored identification yarns.
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