Unidirectional roving - continuous
8-end, K-37 fiber, per MIL-R-60346,
type I,class 1
G-(135-140) fiber, per MIL-R-60346, type
I, class 1 - 1 to 4 inches, random length
0.010 with compatible finish
Glass sizing - all reinforcement
Chrome silane or silane finish, 3% by
Mechanical needling, approximately
180/square inch, over entire surface area
through all reinforcing components
As specified 0.25 inches (see 6.2)
None - clean cut with no loose roving
50 10 linear yards. One splice per roll
allowed. Flag each splice at roll end.
18.104.22.168 Roving distribution. The material shall be such that 80 percent of the
construction is free of roving crossover. The gap between roving shall be not greater
than 0.150 inch. A fine thread of single glass fiber, K-37 , may be interlaced at 90 to
the unidirectional roving at intervals of approximately 0.5 inch to control roving
spacing (see 4.8.13).
22.214.171.124 Weight. The weight of the bare material shall be 2.50 0.25 ounces
per square foot (see 4.8.14).
3.2.4 Resin system. The resin system shall consist of epoxy resin conforming
to MIL-R-9300, type I, grade 0, form A, modified with a suitable elastomer (see 4.8.2).
3.2.5 Storage life. The materials as furnished by the manufacturer shall be
capable of meeting the requirements specified herein after storage in the original
unopened containers at a temperature not greater than 4 Celsius (C) for not less than
90 days (see 4.8.4).