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  • 22uf capacitor
  • 22uf capacitor

Double Side Metallised Al Pet Film Center Margin

MPET films are constructed with 1.9um–12um polyester plain film. The standard width is 620 mm.

A high vacuum is employed by a coating machine to melt, evaporate, and deposit high-purity zinc and aluminum on the base film. A metalized polypropylene film is then produced on the surface after an exceedingly thin metal layer has been formed.

The metalized film has a self-healing capability that enables it to return naturally to the electrical performance phenomenon prior to the breakdown after the partial breakdown of the film dielectric. To prevent metal from evaporating and to form the blank insulating strip known as the margin, the metalized film is covered on one or both sides of the edge or in the center. The margin's width is referred to as the margin in the following sentences.


Specification of Double Side Metallised Al Pet Film Center Margin


Base film

Polyester film

Normal thickness

4.8μm ~12.0μm

Margin type

middle

Coating metal

Aluminum

Coating side

double

Edge structure

No Heavy edge


Square resistance: Normal film Width and Margin


Width(mm)

Margin(mm)

Width(mm)

Margin(mm)

14

3.0

38

3.0

18

3.0

42

3.0/4.0

20

2.0/3.0

52

3.0/4.0


Square resistance

Tolerance

1.5Ω/□

±30%

2.0Ω/□

±30%

2.5Ω/□

±30%

3.0Ω/□

±30%

Note: If a customer needs other resistance, film width, or margin, please contact us.


Inside/outside core diameter:


Inside core diameter/Tolerance

Outside core diameter/Tolerance

75mm

+1/-0.5mm

175

220

±25mm

±20mm

Note: A pair tolerance of outside core diameter ≤2mm.


Specifications of the metalized polyester film:


Properties

Unit

Typical value

Density

g/cm3

1.4

Thickness

µm

<5

5~12

≥12

Tensile Strength

MD (MPa)

≥84

≥108

≥120

Elongation at Break

MD (%)

≥22

≥33

≥44

Elastic Modulus

MD (MPa)

3500

Break-down Voltage

V/µm

≥200

( 23°C, DC )

≥250

( 23°C, DC )

Heat Shrinkage

MD (%)

≤2.5 ( 150°C, 10min)

Surface Roughness

µm

0.095

Melting Point

256

Volume Resistivity

Ω.m

>1015

( 23°C, Humidity 50%)

Dielectric Constant


3.2

(20℃,1KHz)

Dissipation Factor

-

≤60×10-4

(20℃,1KHz )

RC

ΩF

≥1×104


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