Properties

Unit

Grade

3526 Phenolic Cloth

Laminate Tube

Density

g/cm³

1.04-1.20

Water absorption rate

%

≤4

Thermostability(24h)

℃

130

Flexural strength

MPa

≥80.0

Compressive strength

MPa

≥45.0

Shear strength

MPa

—

Surface

resistance

Under normal condition

W

≥1.0×10⁸

In case of humidity

≥1.0×10⁷

Volume

resistivity

Under normal condition

W×m

≥1.0×10⁷

In case of humidity

≥1.0×10⁵

Impregnated in water

—

Insulation

resistance

Under normal condition

W

—

Impregnated in water

—

Dissipation

factor

50Hz

—

Dielectric strength perpendicular to laminations

(withstand voltage)

(in 90±2℃/5min transformer oil)

kV/mm

≥3.5 in 20℃

transformer oil

Dielectric break down parallel

to laminations (in 90±2℃/5min

transformer oil)

kV

—

Surface withstand voltage (in case of

humidity, under normal condition air

withstand voltage 1 min)

kV

—