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Specifications

3240 sheet(epoxy sheet) is made of E-glass cloth impregnated with epoxy phenolic resin by processing under heat and pressur.

3420 sheet (epoxy sheet,glass cloth sheet) having high mechanical and dielectric properties,fine heat and humidity resistance.

3420 sheet (epoxy sheet,glass cloth sheet) used in electrical machine and devices as insulating construction parts in moist cirecumstances and in transformer oil.

3240 sheet is similar to NEMA L1 grade G10 sheet.

The size of area:1020x2040mm (40"x80");1220x2440mm(48"x96")

Thickness:0.5-100mm (0.020"-3.94")

Item	Unit	Value
Density	g/cm3	1.70-1.90
Martens heat resistance (LW) ≥	oC	200
Flexural strength ≥ Perpendicular to lamination parallel to lamination	MPa	400 300
Tensile strength ≥ Perpendicular to lamination parallel to lamination	MPa	350 250
Bonding ≥	N	5680
Impact strength ≥ Perpendicular to lamination parallel to lamination	kJ/m2	150 100
Surface resistivity ≥ Under normal condition After impregnated in water	Ω	1×1013 1×1011
Volume resistivity ≥ Under normal condition After impregnated in water	Ω.cm	1×1013 1×1011
Insulation resistance parallel to lamination ≥ Under normal condition After impregnated in water	Ω	1×1010 1×108
Loss tangent, 50Hz ≤	-	0.05
Voltage endurance perpendicular to lamination in transformer oil at 90±2oC ≥ Thickness 0.5-1 mm Thickness 1.1-2 mm Thickness 2.1-3 mm	kV/mm	22 20 18
Voltage endurance parallel to lamination in transformer oil at 90±2oC ≥	kV	30