Item

Unit

Index

Density

g/cm3

1.80～2.0

Flexural strength perpendicular to laminations

MPa

≥350

Impact strength parallel to laminations (Charpy)

kJ/m2

≥33

Dielectric strength perpendicular to laminations (in 90±2℃  transformer oil,1 mm  in thickness)

kV/mm

≥14.2

Breakdown voltage parallel to laminations (in 90±2℃  transformer oil)

KV

≥35

Dissipation factor(1MHz)

-

≤0.03

Permittivity (1MHz)

-

≤5.5

Insulation resistance after immersion in water (D-24/23)

Ω

≥1.0×108

water absorption(thickness 10mm)

%

≤0.5