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Anti-oxidation capacitor film and preparation method thereof

A capacitor film, anti-oxidation technology, applied in the direction of multilayer capacitors, fixed capacitor electrodes, fixed capacitor dielectrics, etc., can solve the problems of capacitor breakdown accidents, poor repositioning force, etc., and achieve extended service life, smooth surface, and improved cleanliness. and the effect of pressure resistance

Inactive Publication Date: 2016-09-07
南通百正电子新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion of the metallized zinc coating on the surface of the film is extremely poor, and it is easily oxidized in the air to form zinc oxide with a fluffy structure, which easily leads to breakdown accidents in capacitors

Method used

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  • Anti-oxidation capacitor film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, an anti-oxidation capacitor film includes a base film 1 and a first aluminum coating 2, a zinc coating 3 and a second aluminum coating 4 that are sequentially plated on the base film 1, the first aluminum coating 2 and the A blank area 6 is left at the edge of the base film 1; a layer of tung oil protective layer 5 is arranged on the second aluminum coating 4, and the tung oil protective layer 5 combines the first aluminum coating 2, the zinc coating 3 and the The second aluminum coating 4 is isolated from the air, and the second aluminum coating 4 has a stepped structure.

[0029] In this embodiment, the base film 1 is a polypropylene capacitor film.

[0030] In this embodiment, the base film 1 has a thickness of 2 μm and a width of 300 mm.

[0031] In this embodiment, the width of the blank area 6 is 1 mm.

[0032] Correspondingly, the present invention also provides a preparation method of the anti-oxidation capacitor film, comprising th...

Embodiment 2

[0046] An anti-oxidation capacitor film, comprising a base film and a first aluminum coating, a zinc coating and a second aluminum coating sequentially plated on the base film, leaving blanks at the edges of the first aluminum coating and the base film area; the second aluminum coating is provided with a layer of tung oil protective layer, and the tung oil protective layer isolates the first aluminum coating, the zinc coating and the second aluminum coating from the air, and the second aluminum coating is a ladder structure.

[0047] In this embodiment, the base film is a polypropylene capacitor film.

[0048] In this embodiment, the base film has a thickness of 2.5 μm and a width of 450 mm.

[0049] In this embodiment, the width of the blank area is 1-2 mm.

[0050] Correspondingly, the present invention also provides a preparation method of the anti-oxidation capacitor film, comprising the following steps:

[0051] S1. Preparation of base film:

[0052] S2, the vacuum pres...

Embodiment 3

[0064] An anti-oxidation capacitor film, comprising a base film and a first aluminum coating, a zinc coating and a second aluminum coating sequentially plated on the base film, leaving blanks at the edges of the first aluminum coating and the base film area; the second aluminum coating is provided with a layer of tung oil protective layer, and the tung oil protective layer isolates the first aluminum coating, the zinc coating and the second aluminum coating from the air, and the second aluminum coating is a ladder structure.

[0065] In this embodiment, the base film is a polypropylene capacitor film.

[0066] In this embodiment, the base film has a thickness of 5 μm and a width of 600 mm.

[0067] In this embodiment, the width of the blank area is 1-2mm.

[0068] Correspondingly, the present invention also provides a preparation method of the anti-oxidation capacitor film, comprising the following steps:

[0069] S1. Preparation of base film:

[0070] S2, the vacuum press...

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Abstract

The present invention discloses an anti-oxidation capacitor film. The anti-oxidation capacitor film includes a base film and a first aluminum coating, a zinc coating and a second aluminum coating that are sequentially plated on the base film. The second aluminum coating is of a step structure, thereby improving the grade and self-healing effect of a capacitor. The second aluminum coating is provided with a tung oil protection layer, thereby preventing the aluminum coating and the zinc coating from being oxidized by air, improving the anti-oxidation capacity of a metalized capacitor film, and prolonging the service life of the capacitor. The present invention further discloses a preparation method of the anti-oxidation capacitor film. Isotactic polypropylene is used as a main material, additives and other materials are added, the base film is obtained through melt extrusion, blowing and stereotyping, sheet casting, two-way stretching, cooling stereotyping, setting amplitude and trimming, dragging and cutting, winding and two times of aging treatment, and in a vacuum condition, the base film is sequentially plated with the first aluminum coating, the zinc coating, the second aluminum coating and the tung oil protection layer so as to obtain the anti-oxidation capacitor film. The capacitor film prepared by the method has good temperature resistance and anti-oxidation performance.

Description

technical field [0001] The invention relates to the technical field of capacitor metallized films, in particular to an oxidation-resistant capacitor film and a preparation method thereof. Background technique [0002] Film capacitors use metal foil as an electrode, and it is laminated with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and then wound into a cylindrical capacitor. It has the following main characteristics: non-polarity, high insulation resistance, excellent frequency characteristics, small dielectric loss, and small volume and large capacity. Based on the above advantages, film capacitors are widely used in many industries such as electronics, home appliances, electric power, and communications. They are the most basic electronic components essential to the electronic information industry and the electric power industry. With the development of information technology, power grid construction, electrified railw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/33H01G4/008H01G4/14
CPCH01G4/33H01G4/008H01G4/14
Inventor 徐明强陈文亮张勇
Owner 南通百正电子新材料股份有限公司
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