FR4 sheet is made of alkali-free E-glass cloth impregnated with epoxy resins by processing under heat and pressure.
It is a thermosetting industrial laminate consisting of continous filament glass cloth with an epoxy resin binder.
Grade FR-4 laminates sheet is with high mechanical strength at room temperature, good electrical properties under dry and humidity conditions. It is flame retardant.
Application : in electrical motor ,insulation mounting of electrical apparatus.working in high humidity and transformer oil.
|
No. |
Item |
Units |
value |
||
|
1 |
Applicable Standards |
— |
G10 |
FR-4 |
|
|
2 |
Density |
g/cm3 |
1.80～1.90 |
1.80～1.90 |
|
|
3 |
Bending strength perpendicular to laminations |
MPa |
340 |
340 |
|
|
4 |
Impact strength parallel to laminations( Charpy) |
kJ/m2 |
33 |
33 |
|
|
5 |
Insulation resistance after impregnated in water |
Ω |
5×1010 |
5×1010 |
|
|
6 |
Relative permittivity 48～62Hz |
— |
|
|
|
|
7 |
Voltage endurance parallel to lamination (in oil 90±2℃) |
kV |
35 |
35 |
|
|
8 |
Voltage endurance perpendicular to lamination (in oil 90±2℃) |
kV/mm |
|
|
|
|
9 |
Water absorption |
mg |
|
|
|
|
10 |
Flame resistance |
— |
— |
V0 |
|
|
11 |
Temperature index |
℃ |
155 |
155 |
|
