MIL-M-46861B (MI)
TABLE I. Reinforcement construction.
Component |
Definition |
Unidirectional roving - continuous Chopped strand Surfacing mat Glass sizing - all reinforcement Mechanical binding Width Selvage Length |
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 Chrome silane or silane finish, 3% by weight maximum 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. |
3.2.3.3 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).
3.2.3.4 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).
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