Properties

Units

Epoxy glass cloth laminated sheets

3240

3240-1

-

Flexural strength perpendicular to lamination ≥

MPa

340

320

-

Notch impact strength parallel to lamination charpy 　≥

KJ/m²

33

33

-

Dielectric strength perpendicular to lamination （in oil 90±2℃） 　≥

MV/m

14.2

14.2

-

Breakdown voltage parallel to lamination
（in oil 90±2℃） ≥

KV

35

30

-

Relative dielectric coefficient ≤

—

5.5

—

-

Loss factor≤

—

0.04

—

-

Insulation resistance after impregnated in water ≥

Ω

5×10⁸

1×10⁸

-

Water absorption   1mm 　≤

mg

18

18

-

Flammability

—

—

—

-

colour

—

Natural

Reference standard

—

GB/T 1303.1-1998

Enterprise's standards

Characteristics & applications

1. 3240：Suitable for mechanical ,electrical ,electronic usual applictions,with high strength under moderate temperature and good electrical 
properties under high temperature.
2. 3240-1、3240F：Modified grades from 3240, 3240-1 not as strong mechanically as 3240,3240F is kind of flame retardent.