Metallized polypropylene film for electrical appliances can be coated with a very thin plastic film on its surface.
Metallised polypropylene film will melt under high vacuum melting and the evaporation of the upper. Metalized polypropylene film is the main raw material for thin film batteries.
Biaxially Oriented Polypropylene film (BOPP film).
Melt, evaporate and precipitate high-purity aluminum or zinc on BOPP base film under a high vacuum, and form a very thin metal layer on the surface of BOPP base film.
It has a self-healing effect. After the local breakdown of metallized film medium, it instinctively recovers to the electrical performance phenomenon before breakdown.
Margin refers to the requirement of actual capacitor production. The blank insulating strip (strip) formed by covering the edges or middle of one or both sides of the metallized film without metal evaporation is called the margin, and its width is called the margin.
The resistance value of the metal layer on the metallized film of square resistance in the unit square area is called the square resistance, which is expressed in Ω/□. Generally, the square resistance is used to represent the thickness of the metal coating.
Thickness: 2um - 12um
Width: according to the customer's design needs, the steam plating and slitting shall be carried out.
Prior to use, the metallic film should be kept in its original packaging at a temperature between 5 and 35 °C and a relative humidity of no more than 85%.
When exposed to moisture, metalized layers are readily oxidized.
As a result, once opened, the film should be utilized as soon as feasible.
After opening, a temperature between 15 and 25 °C with a relative humidity of under 60 % is advised.
The storage time can be as follows when the original sealed container is kept as described above:
Aluminized film: 12 months after the date of delivery.
Metalized Al/Zn alloy film:
The storage time (as measured from the delivery date) depends on the film's resistivity because zinc is rather unstable:
≦10Ω: 6 months
10-30Ω: 3 months
>30Ω: 1 month
Metallised polypropylene film is used in film capacitors, such as MKP/MFP (CBB) capacitors, EMI suppression capacitors, AC motor capacitors, Power electronic capacitors (DC-Link capacitors, DC filter capacitors, AC filter capacitors), DC pulse capacitors, DC high voltage Storage capacitors, Self-healing shunt power capacitors (Power factor correction capacitors), etc.