Epoxy sheets are used for electrical insulation in various fields. It is made from alkali free glass cloth on which epoxy resin is impregnated. It possesses very high mechanical and electrical stability. They are characterized by several properties such as:
0.5~80mm +-0.14~2.8mm |
Thickness |
0.5~80mm Tolerance+-0.14~2.8mm |
960x1960mm +-10mm |
Area |
960x1960mm+-10mm |
1.70~1.90 |
Specific gravity |
1.70~1.90 |
200 oC |
Martins thermal stability |
longitudinal min. 200 oC |
4000kgf/cm2
3000kgf/cm2 |
Bending strength |
longitudinal min. 4000kgf/cm2
horizontal min. 3000kgf/cm2 |
3500kgf/cm2
2500kgf/cm2 |
Tensile strength |
longitudinal min. 3500kgf/cm2
horizontal min. 2500kgf/cm2 |
580kgf |
Adhesive strength |
min 580kgf |
150kgf/cm2/cm2
100kgf/cm2/cm2 |
Impact strength |
longitudinal min. 150kgf.cm2/cm2
horizontal min. 100kgf. cm2/cm2 |
1.0x1013ohm
1.0x1011ohm |
Surface resistivity |
normal state min. 1.0x1013ohm
immersion state min. 1.0x1011ohm |
1.0x1013ohm
1.0x1011ohm |
Volume resistivity |
normal state min. 1.0x1013ohm
immersion state min. 1.0x1011ohm |
1.0x1010ohm
1.0x108ohm |
Parallel to laminate
Insulating resistance |
normal state min. 1.0x1010ohm
immersion state min. 1.0x108ohm |
50Hz. 0.050 |
Dielectric loss angle. tangent, at 50Hz 0.050 |
90x2 oC
0.5~1.0mm 22.0kv/mm
1.1~2.0mm 20.0kv/mm
2.1~3.0mm 18.0kv/mm
3mm 18.0kv/mm |
Vertical to laminate
breakdown strength
oil
|
0.5~1.0mm min. 22.0kv/mm
1.1~2.0mm min. 20.0kv/mm
2.1~3.0mm min. 18.0kv/mm
for sheets of 3.0mm & up with one side processed min. 18.0kv/mm
|
90+-2 oC 30.0kv |
Parallel to laminate |
in transformer oil of 90+-2 oC mm. 30.0kv |
