CN101295584A - Aluminum thickened thin film for metalized capacitor - Google Patents
Aluminum thickened thin film for metalized capacitor Download PDFInfo
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- CN101295584A CN101295584A CNA2007100401647A CN200710040164A CN101295584A CN 101295584 A CN101295584 A CN 101295584A CN A2007100401647 A CNA2007100401647 A CN A2007100401647A CN 200710040164 A CN200710040164 A CN 200710040164A CN 101295584 A CN101295584 A CN 101295584A
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Abstract
The invention discloses a film used for a full aluminum thickened metallized capacitor, consisting of an electric medium layer and an aluminum layer evaporated on the surface of the electric medium layer; the invention is characterized in that a layer of thickened zinc-aluminum reinforcing layer is evaporated on the aluminum layer; the material of the zinc-aluminum reinforcing layer is zinc-aluminum alloy; wherein, the weight percentage of zinc is 30 to 60 percent and the weight percentage of aluminum is 40 to 70 percent; the thickness of the zinc-aluminum reinforcing layer is 6 to 8 times of the thickness of the aluminum layer and the width is 1 to 5mm. The aluminum reinforcing layer can be arranged in the middle position of the aluminum layer or on the edge. The electric medium layer is a polypropylene layer or a polyester layer. The invention adopts an evaporation method to evaporate a layer of aluminum reinforcing layer on the surface of the original metallized film, namely, the invention utilizes the characteristic that the aluminum is easy to be oxidized in the air to form compact alumina to improve the anti-oxidation capacity of the metallized film; simultaneously, the aluminized amount in a metal layer is reduced greatly and improve the the self-healing property of the metal layer is improved.
Description
Technical field
The present invention relates to the coating structure of thin film for metalized capacitor, particularly aluminum thickened thin film for metalized capacitor.
Background technology
Existing thin film for metalized capacitor, be upward under high vacuum condition, to adopt the METAL HEATING PROCESS evaporation technique to plate metal polar plate with coating machine at basement membrane (as insulating material such as mylar, polypropylene films) as dielectric material, pole plate can divide single aluminium coat and zinc-aluminium to plate two-layer, because of it has unique self-healing feature, be widely used in and make all kinds of electric power compensations usefulness or motor starting AC capacitor and DC filter capacitors.The self-healing performance of metallized film uniqueness may obviously be improved the proof voltage ability and the useful life of metallic film capacitor.Because the fusing point of zinc is lower than aluminium, easilier when thermal breakdown of capacitor, to bring into play, self-healing property is better, so aluminium zinc composition metal film has better voltage endurance than the aluminum metallization film.But because zinc coating is puted forth effort extreme difference answering of film surface, therefore necessary first AM aluminum metallization is then at evaporation zinc, and zinc very easily oxidation in air, the capacitor that will cause of the zinc-aluminium film after the oxidation lost efficacy, and therefore the storage environment to the zinc-aluminium metallized film that plates has strict temperature requirement.Simultaneously, in order to guarantee all even densification of aluminium coated in the zinc-aluminium coating, the amount of aluminizing must reach certain amount, and the increase of the amount of aluminizing will reduce the self-healing performance of metallized film, influence the voltage endurance of film equally, finally influence capacitor quality and useful life.In order to solve this type of problem, the metal current film generally is at the first evaporation last layer of whole film aluminium film, then at a zinc-plated reinforced layer on the evaporation again on the aluminium film, the width of this reinforced layer generally width than film is little a lot, so neither influence the voltage endurance of film, improved the self-healing performance of metallized film again.But the metallized film that adopts such coating does not still solve zinc very easily oxidation in air, the problem that will cause capacitor to lose efficacy of the zinc-aluminium film after the oxidation.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned defective, and a kind of aluminum thickened thin film for metalized capacitor is provided, to solve many technical problems that existing metallized film exists.
Technical problem to be solved by this invention is and can be achieved through the following technical solutions:
Aluminum thickened thin film for metalized capacitor, form at the aluminium lamination of dielectric layer surface by dielectric layer and evaporation, the zinc-aluminium reinforced layer that it is characterized in that evaporation last layer thickening on described aluminium lamination, the material of described zinc-aluminium reinforced layer is an allumen, wherein the percentage by weight of zinc is 30-60wt%, the percentage by weight of aluminium is 40-70wt%, the thickness of this zinc-aluminium reinforced layer be described aluminium lamination thickness 6-8 doubly, width is 1-5mm.
Described aluminium reinforced layer can be positioned at the centre position or the edge of described aluminium lamination.
The dielectric layer that the present invention adopts is polypropylene layer or polyester layer.
The present invention is by adopting the evaporating coating method, and evaporation one deck zinc-aluminium is strengthened coating again on the aluminium lamination surface of original metallized film, promptly utilize aluminium easily in air oxidation form the characteristic of fine and close aluminium oxide, improve the antioxidant capacity of metallized film.Significantly reduce the amount of aluminizing in the metal level simultaneously, improve the self-healing performance of its voltage endurance and metallized film.
Description of drawings
Fig. 1 is the structural representation of aluminum thickened thin film for metalized capacitor embodiment 1 of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the structural representation of aluminum thickened thin film for metalized capacitor embodiment 2 of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Embodiment 1:
As depicted in figs. 1 and 2, the present invention is a kind of aluminum thickened thin film for metalized capacitor, is made up of at the aluminium lamination 2 on dielectric layer 1 surface dielectric layer 1 and evaporation, is full aluminium film.Dielectric layer 1 is polypropylene layer or polyester layer, zinc-aluminium reinforced layer 3 in the middle evaporation last layer thickening of aluminium lamination 2, the material of aluminium reinforced layer 3 is an allumen, wherein the percentage by weight of zinc is 30wt%, the percentage by weight of aluminium is 70wt%,, be positioned at the centre position of aluminium lamination 2, its thickness be aluminium lamination 2 thickness 6-8 doubly, width is 1-5mm.
Side's resistance of zinc-aluminium reinforced layer 3 generally is controlled at 1-4 Ω/, and side's resistance of non-thicker region generally is controlled at 6-12 Ω/.
The preparation method: with the method for covering method or oil shielding, the part that does not need to thicken is blocked, do not allowed zinc, aluminium-vapour deposition get on, the part thickening that makes it not to be blocked can form zinc-aluminium reinforced layer 3.With the method for oil shielding, should suitably control oily temperature distributive value.With the method for covering, working face zinc-aluminium steam is partly blocked, do not allow the zinc-aluminium steamed to film, can obtain zinc-aluminium reinforced layer 3.
Or with the method for twice evaporation, plating working face earlier, the position is strengthened in the back plating, makes its form zinc-aluminium reinforced layer.For example on existing zinc-aluminium coating machine, keep the primary aluminum stove, also change the zinc stove into the zinc-aluminium stove simultaneously, increase heating power, and strengthen cold rolling cooling, plate working face earlier, the position is strengthened in the back plating, promptly obtains zinc-aluminium reinforced layer 3.
As shown in Figure 3, the present invention is a kind of aluminum thickened thin film for metalized capacitor, is made up of at the aluminium lamination 2 on dielectric layer 1 surface dielectric layer 1 and evaporation, is full aluminium film.Dielectric layer 1 is polypropylene layer or polyester layer, zinc-aluminium reinforced layer 3 in the middle evaporation last layer thickening of aluminium lamination 2, the material of aluminium reinforced layer 3 is an allumen, wherein the percentage by weight of zinc is 40wt%, the percentage by weight of aluminium is 60wt%,, be positioned at the centre position of aluminium lamination 2, its thickness be aluminium lamination 2 thickness 6-8 doubly, width is 1-5mm.
Side's resistance of zinc-aluminium reinforced layer 3 generally is controlled at 1-4 Ω/, and side's resistance of non-thicker region generally is controlled at 6-12 Ω/.
Its preparation method is with embodiment 1.
As shown in Figure 3, the present invention is a kind of aluminum thickened thin film for metalized capacitor, is made up of at the aluminium lamination 2 on dielectric layer 1 surface dielectric layer 1 and evaporation, is full aluminium film.Dielectric layer 1 is polypropylene layer or polyester layer, zinc-aluminium reinforced layer 3 in the middle evaporation last layer thickening of aluminium lamination 2, the material of aluminium reinforced layer 3 is an allumen, wherein the percentage by weight of zinc is 60wt%, the percentage by weight of aluminium is 40wt%, be positioned at the centre position of aluminium lamination 2, its thickness be aluminium lamination 2 thickness 6-8 doubly, width is 1-5mm.
Side's resistance of zinc-aluminium reinforced layer 3 generally is controlled at 1-4 Ω/, and side's resistance of non-thicker region generally is controlled at 6-12 Ω/.
Its preparation method is with embodiment 1.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1, aluminum thickened thin film for metalized capacitor, form at the aluminium lamination of dielectric layer surface by dielectric layer and evaporation, the zinc-aluminium reinforced layer that it is characterized in that evaporation last layer thickening on described aluminium lamination, the material of described zinc-aluminium reinforced layer is an allumen, wherein the percentage by weight of zinc is 30-60wt%, the percentage by weight of aluminium is 40-70wt%, the thickness of this zinc-aluminium reinforced layer be described aluminium lamination thickness 6-8 doubly, width is 1-5mm.
2, aluminum thickened thin film for metalized capacitor according to claim 1 is characterized in that described zinc-aluminium reinforced layer is positioned at the centre position of described aluminium lamination.
3, aluminum thickened thin film for metalized capacitor according to claim 1 is characterized in that described zinc-aluminium reinforced layer is positioned at the marginal position of described aluminium lamination.
4,, it is characterized in that dielectric layer is polypropylene layer or polyester layer according to the described aluminum thickened thin film for metalized capacitor of each claim 1 of claim 1 to 3.
5,, it is characterized in that side's resistance of described zinc-aluminium reinforced layer generally is controlled at 1-4 Ω/ according to the described aluminum thickened thin film for metalized capacitor of each claim 1 of claim 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100401647A CN101295584A (en) | 2007-04-28 | 2007-04-28 | Aluminum thickened thin film for metalized capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100401647A CN101295584A (en) | 2007-04-28 | 2007-04-28 | Aluminum thickened thin film for metalized capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN101295584A true CN101295584A (en) | 2008-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100401647A Pending CN101295584A (en) | 2007-04-28 | 2007-04-28 | Aluminum thickened thin film for metalized capacitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103895265A (en) * | 2014-04-18 | 2014-07-02 | 芜湖市德宝新材料股份有限公司 | Low-loss metallized film |
| CN106847508A (en) * | 2015-12-05 | 2017-06-13 | 佛山市欣源电子股份有限公司 | A kind of low-loss high charge-discharge performance thin film capacitor |
| CN110289165A (en) * | 2019-07-23 | 2019-09-27 | 安徽纽艾新能源技术有限公司 | A kind of explosion-proof metallized polypropylene film of high voltage |
-
2007
- 2007-04-28 CN CNA2007100401647A patent/CN101295584A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103895265A (en) * | 2014-04-18 | 2014-07-02 | 芜湖市德宝新材料股份有限公司 | Low-loss metallized film |
| CN106847508A (en) * | 2015-12-05 | 2017-06-13 | 佛山市欣源电子股份有限公司 | A kind of low-loss high charge-discharge performance thin film capacitor |
| CN110289165A (en) * | 2019-07-23 | 2019-09-27 | 安徽纽艾新能源技术有限公司 | A kind of explosion-proof metallized polypropylene film of high voltage |
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Open date: 20081029 |