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Filament diameter and code letter of current commercial filaments .
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Roving, Glass, Fibrous ( For Prepreg Tape and Roving, Filament Winding, and Pultrusion Applications)
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Table II. Property requirements - Continued



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MIL-R-60346C
Table II.
Property requirements
Property
Type I
Type III
Type IV
1
/Package (ball density
(pounds/cubic inch)
.035
.035
.035
minimum
.075
.065
.065
maximum
1
/Shore "O" package ball
Classes 1, 2, and 3
Class 1
Classes 1, and 2
hardness
50
50
50
minimum
90
90
90
maximum
2
Catenary, /inches/50feet,
1.0
0.5
1.0
maximum
Roving yield
see 3.1.4
see 3.1.4
see 3.1.4
Acetone extractable content,
percent of ignition loss,
3
3
minimum
70
NA /
NA /
4
4
4
Resistance to fusion
/
/
/
Tensile strength, psi,
minimum
Other than G
200,000
NA
NA
G
280,000
500,000
400,000
Horizontal shear strength
(after 6-hour boil)
psi, minimum
5
5
Other than G
NA
4,500 / or 6,500 /
6
G
5
5
/
4,500 / or 6,500 /
2.52- 2.61
NA
NA
Specific gravity range
(virgin fiber only)
(floats in solution
specified in 4.3.8)
7

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