IMPROVED COTTON" AIRPLANE FABRIC. 
15 
Table 10. — Comparative weight, breaking strength in pounds, and stretch in 
inches of 3/80's 68 by 68 plain weave gray fabrios, fabrics woven from mer- 
cerized yarn, and piece mercerized fabrics all made from American Egyptian 
Xo. 1 (Fancy) Pima variety 1%-ineh staple cotton. 
Finish. 
Gray fabric 
Yarn mercerized fabric. 
Gray fabric 
Yarn mercerized fabric. 
No. 1 piece mercerized 
fabric 
No. 2 piece mercerized 
fabric 
Twist 
mul- 
tiple. 
Single. 
Ply. 
4.03 
4.03 
4.03 
4.03 
3.83 
3.63 
3.83 
3.63 
3.83 
3.63 
3.83 
3.63 
i Breaking 
Oz. | strength, 
per j 
sq. yd. 
3.90 
3.90 
4.06 
3.94 
3.76 
Warp. Fill. 
84 
Stretch in in. at different loads. 
Warp. 
10 lbs. 20 lbs. 65 lbs 
0.36 
.24 
.24 
.26 
.12 
.16 
.38 
.41 
0.95 
.67 
.73 
.70 
.42 
.52 
Filling. 
10 lbs. 20 lbs. 651b 
0.21 
.24 
.21 
.18 
.20 
0.32 
.36 
.32 
.33 
.32 
.26 
0.66 
.70 
.67 
.63 
.55 
Following the investigation of the properties of 3/80's piece mer- 
cerized fabric made from American Egyptian cotton attention was 
given to producing a Sea Island 2/60's piece mercerized fabric. Up 
to this time Sea Island cotton had been almost exclusively used to 
meet the specifications of the Signal Corps for airplane fabrics.' A 
large amount of 2/60's gray cloth was woven and sent to two finishing 
plants for mercerizing in the piece without direct supervision of the 
Bureau of Markets, in order to furnish a .correct indication of what 
might be expected of cloth mercerized in the piece under commercial 
conditions. The results of these tests were highly successful in that 
the stretch of the warp and filling was considerably reduced and 
practically equalized and the strength maintained, confirming the 
results previously obtained for the 3/80's cloth referred to above. 
Table 11 gives the results of these tests. 
Table 11. — Comparative weight, breaking strength in pounds, and stretch in 
incites of 6/60's SO by 80 plain weave gray fabrics, fabrics -woven from mer- 
cerized yarn, and piece mercerized fabrics, all made from Sea Island cotton. 
Twist per 
Oz. 
per 
Breaking 
Stretch in in. at different leads. 
Finish. 
inch. 
strength. 
Warp. 
Filling. 
Single. 
Ply. 
Warp 
lbs. 
Fill. 
lbs. 
10 lbs. 
20 lbs. 
70 lbs. 
10 lbs. 
20 lbs. 
70 lbs. 
30.5 
30.5 
28.34 
30. 5 
30.5 
21.5 
21.5 
16 
21.5 
21.5 
4.26 
4.00 
4.50 
3.95 
3.97 
76 
85 
80 
82 
82 
88 
87 
80 
90 
81 
0.43 
.40 
.65 
.24 
.17 
0.64 
.53 
.80 
.36 
.27 
0.98 
.92 
1.20 
.68 
.54 
0.16 
.1 
.32 
.17 
.13 
0.24 
.24 
.40 
.26 
.'22 
0.53 
Yarn mercerized fabric. 
Yarn mercerized fabric, 
standard specifica- 
tions 
.48 
.64 
No. 1 piece mercerized 
fabric 
.53 
No. 2 piece mercerized 
iabric 
.52 
