Polyester film is a widely used electrical insulation material offering good dielectric strength, mechanical properties, and thermal resistance. It provides excellent dimensional stability and moisture resistance.

They show dielectric properties, heat stability and high mechanical strength, size stability, transparency and air tightness. It is suitable for electrical insulation in medium and small size of electrical machines and cable wrapping insulation. Also widely used as insulation materials and film composites in domestic electrical appliances. Milky is available too.

No.	Item	Property	Unit	Value
1	Thickness	Nominal thickness (μm)	%	0.23
	tolerance	25 - 100		≤±5
		> 100		≤±4
2	Tensile strength	Nominal thickness (μm)	Mpa	-
	(lengthwise & crosswise)	25 - 100		≥150
		> 100 - 190		≥140
		> 190		≥110
3	Break elongation	Nominal thickness (μm)	%	-
	(lengthwise & crosswise)	25 - 50		≥60
		> 50		≥80
4	Heat shrinkage	Nominal thickness (μm)	-	-
	(lengthwise & crosswise)	25 - 50	%	≤3
		> 50		≤2
		6020SL		lengthwise ≤1.0
		150°C 30min		crosswise ≤0.5
5	Dielectric strength	Nominal thickness (μm)	V/μm	-
		25		≥174
		36		≥150
		50		≥130
		75		≥105
		100		≥90
		125		≥75
		150		≥70
		188		≥65
		250		≥60
		300		≥55
		350		≥50