7.8 thickness polypropylene film wholesale

>Anhui Saifu Electronics Co., Ltd. is a joint venture invested by the British Guanrui Group and was established in March. Our company's coating production staff are all veteran technicians who have been engaged in coating technology for more than ten years. The coating process is in a leading position in the industry.
>Contact number
>Contact person: Hu Dandan
>Customer service
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>Product certification
>Metalized film products for capacitors Picture
>
Product Description
> By evaporating a very thin metal layer of zinc and aluminum on the surface of the film, a film for zinc-aluminum metallized capacitors 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 can improve 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, it is preferred

>, and from the perspective of electrical characteristics, it is even more preferred

>.
>Under the same evaporation metal conditions, the greater the coating thickness &d, the smaller the square resistance value (&
>□), and the smaller the resistance
>
> , the greater the current it carries, 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.
>Zinc-aluminum film (
>Z/
>) has better pressure resistance
>Zinc-aluminum film (
>Z/
>) The moisture resistance is not good and it is easy to oxidize
>Coating method
> >Packaging and transportation method
The film roll is packed in a plastic bag
A label is attached to the outside of the plastic bag to indicate the model
Plastic The outside of the bag should be packed in cartons
The outside of the carton should be packed in wooden boxes or reinforced cartons

>Storage methods
> >
>The metallized film should be stored in its original state before use. Pack and save. The ambient temperature should be controlled at
>
>
>℃, and the humidity should be less than
>%RH
>.
>
>The metal layer will be easily oxidized when exposed to moisture. Therefore, the film roll should be used as soon as possible after the package is opened.
>
>. It is recommended that the temperature conditions for storing unpacked film rolls are
>
>
>℃, and the humidity is less than
>%RH< br/> >.
>
>If the metallized film maintains its original sealed packaging and is stored in the environment as mentioned above, its storage period can meet the following conditions
>Aluminum metallized film: from delivery
>
>months from date.
>Zinc-aluminum metallized film: Because zinc is quite unstable, the storage period depends on the resistance of the film
>Less than or equal to
> h
>
>
>months (from delivery date)
> > h
>to
> h
>
>
>months (from delivery date From)
> h
>Above
>
>months (from the date of delivery)
>

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