>Polypropylene edge thickened gradient square resist film
(
)
>Product description
>A very thin layer of zinc and aluminum is evaporated on the surface of the film Metal layer, a zinc-aluminum metallized capacitor film with excellent self-healing properties can be obtained.
>The biggest feature of metallized films is their self-healing properties, that is, when a breakdown occurs somewhere, the short-circuit current melts and evaporates the metal film around the breakdown site and restores the insulation properties, thus significantly reducing the number of paper or film The impact of penetrating conductive defects and weaknesses on the breakdown strength is reduced, thereby improving the working field strength.
>The thickness of the metal layer is generally ~. Internationally, the thickness of the metal layer can reach ~ , but from the perspective of heat resistance, priority is given to ~ , and from the perspective of electrical characteristics, priority is given to ~ .
> Under the same conditions of evaporated metal, the greater the thickness of the coating, the smaller the square resistance value (/□), the smaller the resistance R, and the greater the current it can carry, but the self-healing performance becomes worse.
>The zinc-aluminum metallized film adopts edge thickening evaporation method, which greatly reduces the contact resistance of the gold spray layer and core of the film capacitor, and improves the quality of the capacitor.
>■ Features
>The biggest difference between the gradient square resistance metallized film and the ordinary metallized film is that its square resistance value shows an increasing trend from the edge of the thickened area to the screen band. Adaptable to the current density distribution of the capacitor (the capacitor current density at the screen band is small and the square resistance is large, and the capacitor current density at the edge of the thickened area is large and the square resistance is small), the use of gradient square resistance metallized film will not cause additional temperature rise due to the large square resistance. . When self-healing occurs for a capacitor made of a graded resistance metallized film, the metal layer at the high resistance area will self-heal first, thus improving the self-healing performance of the capacitor.
>The zinc-aluminum film (/) has good pressure resistance
>The zinc-aluminum film (/) has poor moisture resistance and is easily oxidized
>Roll core
>
>. Material: plastic
>. Width: film width deviation.
>. Inner diameter +./.
>
>■ Outer diameter of film roll
Recommended outer diameter
r
. ＜
＜
＜
>Metalized film technical parameters
:
>Metalized polypropylene film
( )
：
Units
Requirements
Density
/
..
Thickness
c
cr
. ~
Tensile strength
r
Longitudinal direction
< br/>
Elongation at break
Br
Longitudinal direction
~
Thermal shrinkage rate
r
Longitudinal direction
(, )
( , )
Dielectric strength
Br
/cr
(, )
< Coated sheet resistance
/> r rc
< /□
Aluminum film
..
..
..
<> >
<> >
<> >
<> >
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Polypropylene edge thickened gradient square resist film