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Page Title:
Table 1. Reinforcement construction. |
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|  MIL-M-46861B (MI)
TABLE I.
Reinforcement construction.
Component
Definition
Unidirectional roving - continuous
8-end, K-37 fiber, per MIL-R-60346,
type I,class 1
Chopped strand
G-(135-140) fiber, per MIL-R-60346, type
I, class 1 - 1 to 4 inches, random length
Surfacing mat
0.010 with compatible finish
Glass sizing - all reinforcement
Chrome silane or silane finish, 3% by
weight maximum
Mechanical needling, approximately
Mechanical binding
180/square inch, over entire surface area
through all reinforcing components
Width
As specified 0.25 inches (see 6.2)
Selvage
None - clean cut with no loose roving
Length
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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