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Intermediate packaging
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Roving, Glass, Fibrous ( For Prepreg Tape and Roving, Filament Winding, and Pultrusion Applications)
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Roving ball (Package) dimensions



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MIL-R-60346C
d.
When deemed necessary for type I roving, specific matrix resin
system for horizontal shear strength test and corresponding minimum
value (see table II, footnote 4).
e.
Resin to be used for tensile strength determination of class 2 and
class 3 roving (see 4.3.6).
f.
Horizontal shear strength test (see table II, footnote 5 and
4.3.7), if required for types III and IV roving, including specific
matrix resin to be used and corresponding minimum value.
g.
Outside diameter and length of roving ball (package) (see 3.3 and
6.4).
h.
Inside diameter, and length of winding tube (see 3.3).
i.
Color coding and dimensions of winding tube, if required (see 3.3).
j.
Package (ball) build (winds, direction, turns and spacing), if
required (see 3.3).
k.
Selection of applicable level of pre servation, packaging, and
packing required (see 5.1.1.1 and 5.1.1.2).
l.
Quantities of roving balls (packages) required in the unit and
intermediate packages (see 5.1.1.1 and 5.1.1.2).
m.
Special marking, if required (see 3.3).
6.3  Definitions. For the purpose of this specification, the following
definitions have been used.
Filament - a single glass fiber, as drawn.
Strand - a plurality of filaments gathered together with little or no
twist and bonded with sizing.
Roving - a plurality of strands of filaments gathered together with
little or no twist.
Roving yield - the roving yield in yards per pound is obtained as
follows:
Roving yield
453.6 X length of specimen (yards)
=
Yards per pound
weight of specimen (grams)
17

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