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6020 & 6021 Polyester Film for Electrical Insulation

Description:

6020 & 6021 Polyester Film is a biaxial oriented polyethylene terephthalate (PET) film through melting, casting and stretching. This product has good dielectric and high mechanical properties. It is widely used for electrical insulation, such as slot insulation, interphase insulation and liner insulation in electric motors, and producing insulating flexible laminates.
6020 is transparent, and 6021 is milky white.

Specification and Properties:

1 Appearance: The film is supplied in rolls. Its surface should be flat and smooth, and should be free of defects such as wrinkles, avulsions, particulate matter, blisters, pinholes and contaminations. Edges of rolls should be tidy and clean.
2 Thickness and Tolerance: Recommended nominal thickness as following:
                            25um, 50um, 75um, 100um, 125um, 150um, 188um, 200um, 250um, 300um, 350um
                                                ≤100um                  Tolerance ±5%
                                             100um ~300um       Tolerance ±4%
                                                ≥300um                 Tolerance ±6%
3 Physical properties: Physical properties are as shown in Table 1.
Table 1 Physical properties of Film

No	Properties			Units	Values		Typical Values
1	Tensile strength (MD and TD)		25um~100um	MPa	≥150		200
			100um~250um		≥140		170
			＞250um		≥110		160
2	Elongation at Break ( MD and TD)		25um ~100um	%	≥80		100
			100um~350um		≥90		120
3	Thermal Shrinkage (MD and TD)		25~190um	%	≤3.0		1.6
			＞190um		≤2.0		1.5
4	Power frequency Dielectric Strength 50Hz			V/um	Table 2		Table 2
5	Volume Resistivity			Ω.m	≥1.0x10¹⁴		3.0x10¹⁴
6	Relative Dielectric Constant (50Hz)			--	2.9~3.4		3.2
7	Dielectric Dissipation Factor (50Hz)			--	≤3.0x10^-3		2.3x10^-3
8	Density			kg/m3	6020	6021	6020	6021
					1390±10	1400±10	1392	1408
9	Melting Point			℃	≥256		260
10	Surface Resistivity			Ω	≥1.0x10¹³		5.0x10¹⁴
11	Electrolytic Corrosion	Ocular Estimate		%	≤2		1.4
		Tensile Strength of metallic wire
12	Dimensional Stability under high temperature		When pulling	℃	≥200		≥200

Table 2 Power Frequency Dielectric Strength of Film (50Hz)

Nominal thickness (um)	Values (V/um)	Typical values (V/um)
25	≥170	220
50	≥130	210
75	≥105	180
100	≥90	160
125	≥80	110
150	≥75	95
188	≥65	85
250	≥60	70
300	≥55	60
350	≥50	57