Epoxy Insulation Material for Transformers

Material Properties

Properties			Units	Values
Nominal thickness			mm	0.15	0.17	0.2	0.23	0.25	0.3	0.35
Thickness tolerance			mm	±0.02		±0.03			±0.04
Grammage and tolerance			g/m2	180+25	210±30	240±30	260±35	300±40	350±50	430±50
Tensile strength	MD	No bending	N/10mm	≥80	≥120	≥140	≥180	≥190	≥270	≥320
		After bending		≥80	≥105	≥120	≥150	≥170	≥200	≥300
	TD	No bending		≥80	≥105	≥120	≥150	≥170	≥200	≥300
		After bending		≥70	≥90	≥100	≥120	≥130	≥150	2200
Elongation	MD	No bending	%	≥15					/
		After bending		≥10					≥5
	TD	No bending		≥20					/
		After bending		≥10					≥5
Breakdown Voltage			KV	≥6	≥7	≥9	≥10	≥12	≥15	≥18
No bending
Bonding property at room temp.			/	No delamination
Bonding property at 180±2℃			/	No delamination, no bubble, no adhesive flow
10min
Temp. index of			/	≥155
heat-resistance in a long term (TI)
The quality warranty period			Twelve months