laminate sheet(glass cloth board)

Properties

Unit

Grade

3240

3240-1

3240-3

Flexural strength perpendicular to

laminations

≥

MPa

340

320

320

A:  under normal

conditions

E-1/150 :150±5 °c

—

—

—

Impact Strength

parallel to laminations

(Charpy)

≥

kJ/m2

33

30

30

Insulation Resistance

After immersion in water (D-24/23)

≥

Ω

5.0×108

1.0×108

1.0×108

Dielectric strength

perpendicular to laminations (in 90±2°c

transformer oil,1 mm in thickness)

≥

kV/mm

14.2

14.2

8.0

(thickness 3mm)

Breakdown voltage parallel to laminations

(in 90±2°c transformer oil)

≥

kV

35

30

30

Permittivity

(48-62Hz)

≤

—

5.5

—

—

Permittivity (1MHz)

≤

—

5.5

—

—

Dissipation factor (48-62Hz)

≤

—

0.04

—

—

Dissipation factor(1Mz)

≤

—

0.04

—

—

Water absorption

(D-24/23,1.6mm in thickness)

≤

mg

19

19

19

Density

g/cm3

(1.70-1.90)

(1.70-1.90)

(1.70-1.90)

Flammability

Class

—

—

—

Color

—

Natural

Natural

Natural

Reference standard

Q/TXXFR002-2009