Metallized thin film with metal spraying surface not prone to fall off and preparation method of metallized thin film

Abstract

The invention provides a metallized thin film with a metal spraying surface not prone to fall off. The metallized thin film with the metal spraying surface not prone to fall off comprises an insulating layer which is made of polypropylene and a conductive layer, wherein a capacitor roll core is obtained through winding; the width of the insulating layer is greater than that of the conductive layer, and white edges which are not covered by the conductive layer are formed on two sides of the insulating layer; and metal strips are welded to the two ends of the capacitor roll core and connected with the conductive layer, and grooves for accommodating the metal strips are formed in the white edges. The capacitor has the advantages that the white edges are arranged, so that gaps exist between the two end faces of the capacitor roll core, metal vapor can enter the gaps easily in the metal spraying process, a metal extension piece is formed to connect the conductive layer and the metal spraying surface, and the metal spraying surface is not prone to fall off; and the metal strips are welded on the two end surfaces of the capacitor roll core, so that the shape of the capacitor roll core isstabilized, the normal use of the capacitor is prevented from being influenced by deformation in the use process, the metal spraying surface and the conductive layer can be connected more firmly, andthe metal spraying surface is prevented from falling off.

Description

technical field [0001] The invention relates to the technical field of capacitor processing, in particular to a metallized film whose gold-sprayed surface is not easy to fall off and a preparation method thereof. Background technique [0002] A common film capacitor is made by winding metal foils such as aluminum as electrodes and overlapping plastic films. However, there is another manufacturing method for film capacitors, called metallized film, which is made by vacuum-evaporating a thin layer of metal on a plastic film as an electrode. In this way, the thickness of the electrode foil can be saved, and the volume of the unit capacity of the capacitor can be reduced, so the film capacitor can be easily made into a small capacitor with a large capacity. [0003] At present, the gold-sprayed surface of the capacitor is easy to fall off during the later installation and use, resulting in a decrease in the safety performance and service life of the capacitor. Contents of the...

AI Technical Summary

Problems solved by technology

[0003] At present, the gold-sprayed surface of the capacitor is easy to fall off during the later installation and use, which leads to the reduction of the safety performance of the capacitor and the reduction of the service life.

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