A-A-52071
2.3 Nonfibrous material. The starch and protein content shall not exceed 10.0 percent for class 1 tape; 2.5 percent for class 2 tape; and 4.0 percent for class 3 tape.
2.4 Dimensional stability. When specified (see 5.2), the classes 1, 2, and 3 tape shall be preshrunk and shall not shrink more than 4.0 percent in the direction of the warp.
2.5 Curvature. The finished type I, shutltleless loom tape, shall show no more lateral curvature than 1/4 inch within a yard.
2.6 Weave.
2.6.1 Type I. The weave shall two up and two down single or multiple herringbone twill with one or more reversals of the twill across the width of the tape. Shuttle loom tape shall have a woven edge on both sides. For shuttleless loom tape, the filling shall traverse the full width of the tape and shall be held at the edge by an extra catch-cord end interfacing with the filling yarn.
2.6.2 Type II. The weave shall be plain. The shuttle loom tape shall have a woven edge on both sides. For shuttleless loom tape, the filling shall traverse the full width of the tape and shall be held at the edge by an extra catch-cord end interlacing with the filling yarn.
2.7 Physical requirements. The physical requirements of the tape shall conform to the requirements as specified in table I.
TABLE I. Physical requirements
|
Type |
Width 1/ (inches) |
Warp Strength (pounds min.) |
Filling yarnds (picks per inch) (min.) 2/ |
|
I |
3/16 |
22 |
58 |
|
I |
1/4 |
25 |
38 |
|
I |
3/8 |
30 |
38 |
|
I |
1/2 |
42 |
38 |
|
I |
5/8 |
50 |
38 |
|
I |
3/4 |
65 |
38 |
|
I |
7/8 |
80 |
38 |
|
I |
1 |
85 |
38 |
|
I |
1-1/8 |
95 |
38 |
|
I |
1-1/4 |
115 |
38 |
|
I |
1-1/2 |
130 |
38 |
|
II |
3/16 |
14 |
28 |
|
II |
1/4 |
18 |
28 |
|
II |
3/8 |
24 |
28 |
|
II |
1/2 |
35 |
28 |
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