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Polypropylene-polyvinylidene fluoride composite metallized film and preparation method thereof

A polyvinylidene fluoride, polypropylene film technology, applied in the direction of coating, etc., can solve the problem of self-healing properties of metallized film materials

Inactive Publication Date: 2020-10-23
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are many studies on the self-healing properties of polypropylene high-dielectric modified materials, but there is almost no research on the self-healing properties of metallized film materials after metallization. Therefore, those skilled in the art are committed to studying polypropylene- Balance between self-healing properties and energy storage properties of polyvinylidene fluoride composite metallized films

Method used

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  • Polypropylene-polyvinylidene fluoride composite metallized film and preparation method thereof
  • Polypropylene-polyvinylidene fluoride composite metallized film and preparation method thereof
  • Polypropylene-polyvinylidene fluoride composite metallized film and preparation method thereof

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preparation example Construction

[0023] The present invention also provides a method for preparing a polypropylene-polyvinylidene fluoride composite metallized film, comprising the following steps:

[0024] S100: Prepare polyvinylidene fluoride solution:

[0025] Dissolving polyvinylidene fluoride powder in a polar organic solvent and stirring to obtain a polyvinylidene fluoride solution;

[0026] S200: Place the metallized polypropylene film in the flat film coating machine. After the metallized polypropylene film is spread out flat, add the polyvinylidene fluoride solution prepared in S100 to the coating scraper, and set the flat plate The speed and temperature of the coating machine are used to coat the side of the metallized polypropylene film that is not coated with a metal layer to obtain a polypropylene-polyvinylidene fluoride composite metallized film.

[0027] In a preferred embodiment, the ratio of the polyvinylidene fluoride to the solvent in step S100 is: 10 g of polyvinylidene fluoride is dissol...

Embodiment 1

[0033] A polypropylene-polyvinylidene fluoride composite metallized film, the film is a polyvinylidene fluoride / polypropylene film base film / metal coating structure:

[0034] Wherein, the thickness ratio of polypropylene and polyvinylidene fluoride is 6:2, and the thickness of the metallized polypropylene film base film is 5 μm.

[0035] The polypropylene-polyvinylidene fluoride composite metallized film in this example is prepared by the following method, including steps:

[0036] S100: Prepare polyvinylidene fluoride solution:

[0037] Dissolving polyvinylidene fluoride powder in a solvent and stirring to obtain a polyvinylidene fluoride solution;

[0038] S200. Place a metallized polypropylene film in the flat-panel film coating machine. After the metallized polypropylene film is spread flat, add the polyvinylidene fluoride solution to the coating scraper, and set the temperature of the flat-panel film coating machine Speed ​​and temperature, coating on the non-metallized...

Embodiment 2

[0043] A polypropylene-polyvinylidene fluoride composite metallized film, the film is a polyvinylidene fluoride / polypropylene film base film / metal coating structure:

[0044] Wherein, the thickness ratio of polypropylene and polyvinylidene fluoride is 6:4, and the thickness of the metallized polypropylene film base film is 7 μm.

[0045] The polypropylene-polyvinylidene fluoride composite metallized film in this example is prepared by the following method, including steps:

[0046] S100: Prepare polyvinylidene fluoride solution:

[0047] Dissolving polyvinylidene fluoride powder in a solvent and stirring to obtain a polyvinylidene fluoride solution;

[0048] S200. Place a metallized polypropylene film in the flat-panel film coating machine. After the metallized polypropylene film is spread flat, add the polyvinylidene fluoride solution to the coating scraper, and set the temperature of the flat-panel film coating machine Speed ​​and temperature, coating on the non-metallized...

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Abstract

The invention provides a polypropylene-polyvinylidene fluoride composite metallized film and a preparation method thereof. The preparation method comprises steps: uniformly coating liquid polyvinylidene fluoride on the side surface of a metallized polypropylene base film according to a certain thickness ratio; the thickness of the polypropylene base film is 6 microns; and the coating thickness ofthe polyvinylidene fluoride is 2-4 microns. According to the obtained polypropylene-polyvinylidene fluoride composite metallized film, on the premise that the self-healing performance is guaranteed, the dielectric constant and the energy storage density are remarkably improved at the same time. When the thickness ratio of the polypropylene to the polyvinylidene fluoride is selected, the energy storage density is increased to the maximum extent, and the dielectric loss is kept unchanged compared with that of pure polypropylene. The technology provides a technical basis for improving the energystorage density of a metallized film capacitor.

Description

technical field [0001] The invention belongs to the technical field of electric capacitor preparation, and in particular relates to a polypropylene-polyvinylidene fluoride composite metallized film and a preparation method thereof. Background technique [0002] Metallized polypropylene film is the most widely used electrical material in power capacitors. It has the advantages of high working field strength, low dielectric loss, and high operational reliability. However, its low dielectric constant limits the energy storage of polypropylene, and it is more Limiting its further wider application. [0003] The methods used in the prior art are to modify the dielectric material in multiple layers to build a multi-layer composite system, or to dope the material with inorganic nanoparticles to form a nanocomposite material, etc., which are all ways to improve the energy storage properties of polymers. However, these methods all increase the dielectric loss significantly, and the ...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08L23/12
CPCC08J2323/12C08J2427/16C08J7/0427
Inventor 程璐刘文凤李盛涛周元贾磊
Owner XI AN JIAOTONG UNIV
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