Ultra-thin high-temperature-resistant polypropylene capacitor metallized film and preparation method thereof

A metallized film, polypropylene technology, applied in film/thick film capacitors, capacitors, laminated capacitors, etc., can solve problems such as capacitor stability decline, power grid safety hazards, capacitor failure, etc., to reduce thickness, improve safety and reliability. resistance, the effect of preventing breakdown

Active Publication Date: 2016-10-12
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

The existing polypropylene capacitor film has large thickness, poor temperature resistance, and relatively high thermal shrinkage rate. The capacitor wound with this film will have a faster internal temperature rise as the working time increases, resulting in the stability of the capacitor. The performance drops sharply, and even causes the capacitor to fail, which brings serious safety hazards to the power grid

Method used

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  • Ultra-thin high-temperature-resistant polypropylene capacitor metallized film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the present invention provides a metallized film for an ultra-thin high temperature resistant polypropylene capacitor, comprising a base film 1 and an aluminum coating 2 and a zinc coating 3 that are sequentially plated on the base film 1, the aluminum coating 2 and the There is a blank area 5 at the edge of the base film 1; a high temperature resistant layer 4 is provided on the zinc coating 3, the high temperature resistant layer 4 is polyurethane, and the high temperature resistant layer 4 has a plurality of convex thickened regions.

[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 1 μm and a width of 280 mm.

[0031] In this embodiment, the number of base films 1 is 50.

[0032] In this embodiment, the width of the blank area 5 is 1 mm.

[0033] In this embodiment, the number of the convex thickened region is one.

[0034] Correspondingly, th...

Embodiment 2

[0044] The difference between this embodiment and Embodiment 1 is:

[0045] In this embodiment, the thickness of the base film is 1.5 μm, the width is 540 mm, and the number is 25.

[0046] In this embodiment, the width of the blank area is 1.5 mm.

[0047] In this embodiment, the film has a thickness of 2.5 μm, and is heated for 18 minutes at a temperature of 112° C., with a transverse heat shrinkage rate of 0.15% and a longitudinal heat shrinkage rate of 1.25%.

Embodiment 3

[0049] The difference between this embodiment and the previous embodiment is:

[0050] In this embodiment, the thickness of the base film is 2 μm, the width is 800 mm, and the number is one.

[0051] In this embodiment, the width of the blank area is 2 mm.

[0052] The film has a thickness of 3 μm, and is heated for 20 minutes at a temperature of 120° C., with a thermal shrinkage rate of 0.2% in the transverse direction and a thermal shrinkage rate of 1.5% in the longitudinal direction.

[0053]The ultra-thin high-temperature-resistant polypropylene capacitor metallized film of the present invention and its preparation method have the following beneficial effects:

[0054] 1. The metallized film of the ultra-thin high-temperature resistant polypropylene capacitor of the present invention can greatly enhance the heat dissipation performance of the capacitor by providing a layer of zinc coating on the aluminum coating, improve the safety and reliability of the capacitor, and pr...

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Abstract

The invention discloses an ultra-thin high-temperature-resistant polypropylene capacitor metallized film. The ultra-thin high-temperature-resistant polypropylene capacitor metallized film comprises a base film, an aluminum coating and a zinc coating, wherein the aluminum coating and the zinc coating are sequentially plated on the base film. The zinc coating is provided with a high-temperature-resistant layer. The high-temperature-resistant layer is made of the polyurethane material. The high-temperature-resistant layer is provided with a plurality of convex thickened regions. Accordingly, the invention discloses a preparation method of the ultra-thin high-temperature-resistant polypropylene capacitor metallized film. According to the method, an electrician-level isotactic structured polypropylene resin is adopted as a raw material. The raw material is successively subjected to fusing, plasticizing, extruding through a die head, casting into a strip, bilaterally stretching, cooling, shaping, tentering, trimming, thickness inspection and corona treatment to obtain the base film. The base film is wound and parted off. After that, the aluminum coating, the zinc coating and the high-temperature-resistant layer are successively plated onto the base film in the vacuum condition to obtain the ultra-thin high-temperature-resistant polypropylene capacitor metallized film. The method is simple in operation and the prepared capacitor metallized film is 2-3 mum in thickness. Moreover, the capacitor metallized film is low in hot-shrinkage rate and good in temperature resistance.

Description

technical field [0001] The invention relates to the technical field of metallized films for capacitors, in particular to an ultra-thin metallized film for high temperature resistant polypropylene capacitors and a preparation method thereof. Background technique [0002] Film capacitors are the most basic electronic components. Due to their good temperature characteristics, frequency characteristics and low impedance characteristics, they are widely used in radio and television, communications, computer information, aerospace, measuring instruments, energy-saving light sources, nuclear power industry, power transmission Variable, automotive electronics, military electronics, automatic control, medical equipment, military equipment and hybrid vehicles and other technical fields. [0003] Polypropylene film capacitor is a kind of organic film capacitor, which is made of polypropylene film as the base material. Polypropylene is referred to as "PP" for short. It is mainly polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G2/08H01G4/008H01G4/18H01G4/33
CPCH01G2/08H01G4/008H01G4/18H01G4/33
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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