Fiberglass Molded Rod & Tube

Properties

Units

Grade

Phenolic cotton-cloth rod

Epoxyglass fabric rod

3721

3721-1

3722

3723

3724

3725

3840

3841

3841F

Density≥

—

1.25

1.25

1.28

1.26

1.28

1.26

1.75

1.70

1.75

Water absorption ≤

%

1.0

1.0

2.0

Φ13mm

1.3
Φ13mm

1.5
Φ13mm

1.1
Φ13mm

—

0.5
Φ13mm

0.5
Φ13mm

Flexural strength≥

MPa

117.6

88.0

110.3

89.6

110.3

82.7

343.0

241.3

241.3

Tensile strength ≥

MPa

78.4

—

—

—

—

—

196.0

—

—

Compressive strength ≥

MPa

—

—

131.0

137.9

131.0

137.9

—

241.3

241.3

Insulation resistance parallel to the lamination
A ≥
D-24/23≥

Ω

1.0×10⁸
—

1.0×10⁸

—

—
—

—
—

—
—

—
—

1.0×10¹⁰ 1.0×10⁷

—
—

—
—

Breakdown voltage parallel to laminations in transformer oil≥

KV

20±5°C
10.0

20±5°C
10.0

—

20±5°C 10.0

—

20±5°C 10.0

90±2°C
15.0

90±2°C 15.0

90±2°C 15.0

Flammability

—

—

—

—

—

—

—

—

—

FV0

Colour

—

Natural

Natural

Natural

Natural

natural

or

black

Natural

Natural

Natural

Natural

Characteristics & Applications

—

For mechanical & electrical application.

For mechanical application,
but not stronger than 3721.

Similar to NEMA's c grade

Similar to NEMA's CE grade.

Similar to NEMA's L grade.

Similar to NEMA's LE grade.

Good humidity resistance.
for mechanical & electrical application.

Similar to NEMA's G-10 grade.

Similar to 3841,with good flame retardent.