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Polyester Film

As base film we use a biaxially oriented high purity polyester film (PET) which was developed especially for high dielectric demands.

This film can be metallized either with pure aluminum (99.98 %), zinc or zinc-aluminum alloy.

The electric resistance (metallization strength) and the kind of metallization will be according to the customer's requirements.

Here are our standard kinds of metallization available:

One side metallization with single side margin right / left

One side metallization with heavy edge type BLEND and single side margin right / left

Double internal series with one side metallization

Double internal series with one side metallization and heavy edge type BLEND

Double side metallization with coincidental margin

Double side metallization with diagonal margin

Other designs like multiple internal series, step, tapered and segment metallization and many others on request.

Type designations Polyester PT …

PTPL
PTMA (W)
PTMAD
PTMAR (W)
PTMAZR (W)
PTMZ (W)
PTMZR (W)

Plain-Film (non-Metallized)
Aluminum Metallized (wave cut)
Aluminum Metallized double side
Aluminum Metallized with Heavy Edge (wave cut)
Aluminum Metallized with Zinc Heavy Edge (wave cut)
Zinc Metallized (wave cut)
Zinc Metallized with Zinc Heavy Edge (wave cut)

Nominal thickness (µm)

0,9 / 1,2 / 1,4 / 1,7 / 1,9 / 2,4 / 3,0 / 3,5 / 4,0 / 4,8 / 6,0 / 7,0 / 8,0
> = 10,0 µm on Request!

Special thickness (µm)

3,3 / 4,3 / 4,5 / 4,6 / 5,2 / 5,5 / 8,5 / 9,0

Slitting width

> = 2,25 mm

Free margin

> = 0,25 mm

Inside core diameter

75 mm

Roll outside diameter

155 mm / 165 mm / 180 mm / 200 mm / 240 mm / 330 mm

Typical properties

high mechanical strength, high dielectric and impulse strength, high thermal stability, high dielectric constant – and with that, high capacity with small capacitor volume

Usual applications

  • MKT capacitors for AC and DC applications
  • interference suppression capacitors of type X, Y
  • low voltage capacitors for electronics
  • stacked film capacitors and others

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