JPH0750224A - Metallized polypropylene film for capacitor - Google Patents
Metallized polypropylene film for capacitorInfo
- Publication number
- JPH0750224A JPH0750224A JP19366193A JP19366193A JPH0750224A JP H0750224 A JPH0750224 A JP H0750224A JP 19366193 A JP19366193 A JP 19366193A JP 19366193 A JP19366193 A JP 19366193A JP H0750224 A JPH0750224 A JP H0750224A
- Authority
- JP
- Japan
- Prior art keywords
- film
- capacitor
- polypropylene film
- metallized
- capacitor element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- -1 polypropylene Polymers 0.000 title claims abstract description 51
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 50
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 50
- 239000003990 capacitor Substances 0.000 title claims abstract description 44
- 238000001465 metallisation Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 24
- 239000002184 metal Substances 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 11
- 238000003851 corona treatment Methods 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 229910052725 zinc Inorganic materials 0.000 abstract description 6
- 239000011701 zinc Substances 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 68
- 238000003825 pressing Methods 0.000 description 7
- 238000007740 vapor deposition Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000028659 discharge Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/14—Organic dielectrics
- H01G4/18—Organic dielectrics of synthetic material, e.g. derivatives of cellulose
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コンデンサ用金属化ポ
リプロピレンフィルムに関する。FIELD OF THE INVENTION The present invention relates to a metallized polypropylene film for capacitors.
【０００２】[0002]
【従来の技術】ポリプロピレンフィルムは、その優れた
電気特性から広く電気用途に用いられており、コンデン
サもそのひとつである。コンデンサにはその形状におい
て、丸型と偏平型（積層型を含む）がある。この内、偏
平型は素子巻工程の後、ある温度とある圧力の下でプレ
スされ、偏平型に成形され、外装を施してコンデンサと
されるのが通常である。2. Description of the Related Art Polypropylene films are widely used for electrical applications because of their excellent electrical characteristics, and capacitors are one of them. Capacitors are classified into round type and flat type (including laminated type). Of these, the flat type is usually pressed after a device winding step under a certain temperature and a certain pressure to be molded into a flat type, and then an exterior is applied to form a capacitor.
【０００３】従来、このようにプレス成形された偏平型
コンデンサが、高温に晒されると、初期に対してその容
量が低下するという不具合があった。これは、誘電体で
あるポリプロピレンフィルムが高温に晒されることによ
って縮まって、いったん偏平に成形されたコンデンサ素
子を丸型状に戻す方向に変形し、各巻層間に隙間が生じ
て電極間距離を大きくし、容量の低下につながるもので
ある。従って、この戻りを防ぐためプレス圧力を強化す
る方向でのプレス条件の適正化検討がなされてきた。Conventionally, when a flat type capacitor press-molded in this way is exposed to a high temperature, its capacity is reduced from the initial stage. This is because the polypropylene film, which is a dielectric material, shrinks when exposed to high temperatures and deforms the flattened capacitor element back to the round shape, creating gaps between the winding layers and increasing the interelectrode distance. However, this leads to a decrease in capacity. Therefore, in order to prevent this return, optimization of press conditions in the direction of strengthening the press pressure has been studied.
【０００４】また、このプレス工程で、コンデンサ素子
端部に位置する金属化ポリプロピレンフィルムがカール
するという問題もあった。これは、プレス時に受ける熱
ストレスによって金属層とポリプロピレンフィルム層の
２層からなる金属化ポリプロピレンフィルムが、バイメ
タル効果によってカールし、該プレス工程の後で施され
るコンデンサ素子端面への電極導出のための金属溶射に
おいて、コンデンサ素子端部の例えば金属化面と溶射金
属との電気的接触不良が起こり、ひいてはコンデンサの
誘電損失（ｔａｎδ）を悪化させることがあった。Further, there is a problem that the metallized polypropylene film located at the end of the capacitor element is curled in this pressing step. This is because the metallized polypropylene film consisting of two layers, the metal layer and the polypropylene film layer, is curled by the bimetal effect due to the heat stress received during pressing, and the electrode is led to the end face of the capacitor element after the pressing step. In the metal spraying, the electrical contact failure between, for example, the metallized surface at the end of the capacitor element and the sprayed metal may occur, which may worsen the dielectric loss (tan δ) of the capacitor.
【０００５】従って、このカールを防ぐためにコールド
プレスと呼ばれる常温付近の低温でプレスすることが検
討されてきた。Therefore, in order to prevent this curl, pressing at a low temperature near normal temperature called cold pressing has been studied.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前者で
はポリプロピレンフィルムをその強大な圧力で傷つけ易
くなり、コンデンサの耐電圧特性に支障をきたしたり、
プレス温度が過剰に高くなってカールが助長されｔａｎ
δが悪化するため、おのずと限界があり、容量低下には
有効でなかった。However, in the former case, the polypropylene film is apt to be damaged by the strong pressure, and the withstand voltage characteristic of the capacitor is hindered.
The press temperature becomes excessively high and curling is promoted, and tan
Since δ is deteriorated, it naturally has a limit, and it is not effective for capacity reduction.
【０００７】また後者ではさらに大きな圧力を要するこ
とになり、カールは防げるものの、前者同様ポリプロピ
レンフィルムを傷つけることがあり、コンデンサの耐電
圧特性に支障をきたすという欠点があった。Further, in the latter case, more pressure is required, and although curling can be prevented, the polypropylene film may be damaged as in the former case, and there is a drawback that the withstand voltage characteristic of the capacitor is impaired.
【０００８】本発明者らはかかる課題に鑑み、上述の容
量低下及びｔａｎδ不良を共に起こさせず、良好なコン
デンサ特性を得られるコンデンサ用金属化ポリプロピレ
ンフィルムを提供せんとするものである。In view of the above problems, the present inventors intend to provide a metallized polypropylene film for capacitors, which can obtain good capacitor characteristics without causing both the above-mentioned capacity decrease and tan δ defect.
【０００９】[0009]
【課題を解決するための手段】本発明のコンデンサ用金
属化ポリプロピレンフィルムは、１２０℃における熱収
縮率が長さ方向で４．０％以下、幅方向で０．８％以下
であって、かつ金属化前のフィルムのカール内面を金属
化したことを特徴とする。長さ方向の熱収縮率が４．０
％を超えると、いったん偏平に成形されたコンデンサ素
子を丸型状に戻す力が大きくなり、容量低下を大きくす
るので不適当である。好ましくは３．５％以下、より好
ましくは３．０％以下である。幅方向の熱収縮率が０．
８％を超えると、コンデンサ素子を偏平型に熱プレスす
る際、素子端部のフィルムのカールなどの変形が大きく
なって溶射金属との電気的接触が悪くなり、ひいてはｔ
ａｎδ不良を招くので、不適当である。好ましくは、
０．６％以下である。MEANS FOR SOLVING THE PROBLEMS The metallized polypropylene film for capacitors of the present invention has a heat shrinkage ratio at 120 ° C. of 4.0% or less in the length direction and 0.8% or less in the width direction, and The inner surface of the curl of the film before metallization is metallized. Thermal shrinkage in the length direction is 4.0
If it exceeds%, the force of returning the capacitor element once flattened to the round shape becomes large and the capacity decrease becomes large, so that it is not suitable. It is preferably 3.5% or less, more preferably 3.0% or less. The heat shrinkage ratio in the width direction is 0.
If it exceeds 8%, when the capacitor element is hot-pressed into a flat type, the deformation such as curl of the film at the element end portion becomes large, and the electrical contact with the sprayed metal deteriorates, and eventually t.
This is unsuitable because it causes an δ defect. Preferably,
It is 0.6% or less.
【００１０】フィルムを金属化するときには、そのフィ
ルムのカール内面を金属化する必要がある。フィルムの
外面を金属化すると、コンデンサ素子端面でのフィルム
のカールが大きくなって溶射金属との電気的接触が悪く
なり、ｔａｎδ不良を招くので、不適当である。When metallizing a film, it is necessary to metallize the inside curl of the film. If the outer surface of the film is metallized, the curl of the film at the end surface of the capacitor element becomes large and the electrical contact with the sprayed metal deteriorates, leading to tan δ failure, which is not suitable.
【００１１】この金属化ポリプロピレンフィルムのカー
ルは、ベースとなるポリプロピレンフィルムと金属化に
よって得られる金属層の異なる２層を一体化することに
より発生するものと考えられる。即ち、寸法変化挙動の
比較的大きいポリプロピレンフィルムと、寸法変化挙動
の比較的小さい金属層が一体化する過程や一体化した後
で、物理的あるいは熱的なストレスを受けたときに、該
２層の各々の歪の程度が異なる結果として起こる現象で
ある。このとき、ポリプロピレンフィルム面が内側（金
属面が外側）となる向きに金属化プラスチックフィルム
がカールしようとする作用が働く。ポリプロピレンフィ
ルムの場合、その製造過程における条件によってポリプ
ロピレンフィルム自身がカールしていることが多い。It is considered that the curling of the metallized polypropylene film is caused by integrating two different layers of the polypropylene film as the base and the metal layer obtained by metallization. That is, when a polypropylene film having a relatively large dimensional change behavior and a metal layer having a relatively small dimensional change behavior are integrated with each other or when subjected to physical or thermal stress, the two layers Is a phenomenon that occurs as a result of different degrees of distortion. At this time, the metallized plastic film acts to curl in such a direction that the polypropylene film surface is inside (the metal surface is outside). In the case of a polypropylene film, the polypropylene film itself is often curled depending on the conditions in the manufacturing process.
【００１２】従って、このポリプロピレンフィルムのカ
ール内面を金属化することが必須となるわけである。金
属化前のポリプロピレンフィルムのカールは、金属化を
目的とする面を内側とする向きに０回転以上１回転以下
であることが好ましい。また、１回転を超えると金属化
した後も支障をきたす程度の金属化面を内側とした向き
のカールが残ってしまい、不適当である。より好ましく
はポリプロピレンフィルムのカールは、金属化を目的と
する面を内側とする向きに０回転以上３／４回転以下で
ある。Therefore, it is essential to metallize the inner surface of the curl of this polypropylene film. The curl of the polypropylene film before metallization is preferably 0 rotations or more and 1 rotation or less in the direction in which the surface intended for metallization is inward. Further, if the number of revolutions exceeds one rotation, curls in the direction with the metallized surface facing inward will remain even after metallization, which is unsuitable. More preferably, the curl of the polypropylene film is 0 rotation or more and 3/4 rotation or less in the direction in which the surface intended for metallization is inward.
【００１３】ポリプロピレンフィルムの金属化する面に
金属層を形成し易くするためにコロナ放電処理などの表
面処理を施すことが知られているが、該処理を少なくと
もポリプロピレンフィルムのカール内面に施すと良いこ
とはいうまでもない。It is known that a surface treatment such as corona discharge treatment is applied to the metallization surface of the polypropylene film to facilitate formation of a metal layer, and the treatment is preferably applied to at least the curl inner surface of the polypropylene film. Needless to say.
【００１４】コンデンサ用途に用いられる金属層の金属
としては、アルミニウム、亜鉛、銅、錫、銀、ニッケル
などの単独や併用が例示されるが、特に限定されるもの
ではない。Examples of the metal of the metal layer used for a capacitor include aluminum, zinc, copper, tin, silver and nickel, which may be used alone or in combination, but are not particularly limited.
【００１５】また、金属層の厚さは、特に限定されるも
のではなく、目的に応じて適宜選択すればよい。但し、
金属層の厚さが厚い程金属化面を外側とする向きにカー
ルしようとする性状が強くなる傾向がある。The thickness of the metal layer is not particularly limited and may be appropriately selected depending on the purpose. However,
The thicker the metal layer, the stronger the tendency to curl toward the outside with the metallized surface.
【００１６】また金属層を形成する方法としては、真空
蒸着法、スパッタリング法、イオンビーム法などが例示
されるが、特に限定されるものではない。Examples of the method for forming the metal layer include a vacuum vapor deposition method, a sputtering method and an ion beam method, but the method is not particularly limited.
【００１７】本発明に用いるポリプロピレンフィルムの
ポリマーは、ホモポリマーの他にプロピレンと他のα−
オレフィン（例えばエチレン、ブテンなど）との共重合
体であっても、ポリプロピレンと他のα−オレフィン重
合体（例えばポリエチレン、ポリブテンなど）との混合
品であってもかまわない。また、必要に応じて安定剤な
どの添加剤を添加したり、無機、有機の粒子を添加した
り、他種ポリマーを混入してもよい。Polymers of the polypropylene film used in the present invention include homopolymers, propylene and other α-
It may be a copolymer with an olefin (eg, ethylene, butene) or a mixture of polypropylene and another α-olefin polymer (eg, polyethylene, polybutene). If necessary, additives such as a stabilizer may be added, inorganic or organic particles may be added, or another kind of polymer may be mixed.
【００１８】本発明に用いるポリプロピレンフィルムと
しては、無延伸フィルム、一軸延伸フィルム、二軸延伸
フィルムのいずれでも良いが、薄膜製造に適し熱的寸法
安定性に優れた二軸延伸フィルムが好適である。The polypropylene film used in the present invention may be an unstretched film, a uniaxially stretched film or a biaxially stretched film, but a biaxially stretched film suitable for thin film production and having excellent thermal dimensional stability is preferable. .
【００１９】本発明に用いるポリプロピレンフィルムの
厚さは特に限定されるものではないが、一般には薄いも
のの方が効果が大きく、特に８μｍ以下の厚さで顕著で
ある。The thickness of the polypropylene film used in the present invention is not particularly limited, but generally, the thinner the film, the greater the effect, and particularly the thickness of 8 μm or less is remarkable.
【００２０】本発明の金属化ポリプロピレンフイルムの
マージン（電気絶縁目的などにより金属化面の中に設け
られる金属層のない部分）仕様は特に限定されるもので
はなく、通常のタイプ以外に例えばＴＤマージン、Ｔ型
マージンなどと呼ばれる島状の金属層を形成するもので
あっても差し支えない。The specification of the margin of the metallized polypropylene film of the present invention (the portion having no metal layer provided in the metallized surface for the purpose of electrical insulation) is not particularly limited, and other than the usual type, for example, TD margin. , An island-shaped metal layer called T-shaped margin may be formed.
【００２１】勿論、本発明のフィルムを使用するコンデ
ンサの型式は、限定されるものではない。例えば乾式で
あっても、油浸式であってもかまわない。Of course, the type of capacitor using the film of the present invention is not limited. For example, it may be a dry type or an oil immersion type.
【００２２】次に、本発明の金属化ポリプロピレンフイ
ルムの製造方法の一例について説明する。但し、本発明
は以下の製造方法に限定されるものではない。Next, an example of the method for producing the metallized polypropylene film of the present invention will be described. However, the present invention is not limited to the following manufacturing method.
【００２３】ポリプロピレン樹脂を溶融し、スリットを
施したＴダイよりシート状に押出し冷却固化した後、こ
れを長さ方向及び幅方向に適当な温度で延伸する。こう
して得たフイルムのカール内面に必要に応じて金属層を
設けるためのコロナ放電処理を施す。The polypropylene resin is melted, extruded into a sheet from a slit T die, cooled and solidified, and then stretched in the length direction and the width direction at an appropriate temperature. Corona discharge treatment for providing a metal layer on the inner surface of the curl of the film thus obtained is performed if necessary.
【００２４】一般に熱収縮率は、ポリマーの極限粘度
［η］を高くする程、延伸倍率を大きくする程、延伸温
度や熱処理温度を低くする程大きくなるので、これらの
要件を適宜選択すればよい。Generally, the heat shrinkage increases as the intrinsic viscosity [η] of the polymer increases, the stretching ratio increases, and the stretching temperature and the heat treatment temperature decrease. Therefore, these requirements may be appropriately selected. .
【００２５】またカールは、フィルムの両面の結晶度格
差によってもたらされるので、溶融ポリマーをシート状
に冷却固化する工程や延伸工程でのフィルム両面に加え
られる熱量のバランスを適当に選択すればよい。Since curling is caused by the difference in crystallinity on both sides of the film, the balance of the amount of heat applied to both sides of the film in the step of cooling and solidifying the molten polymer into a sheet or in the stretching step may be appropriately selected.
【００２６】こうして得たフィルムを真空蒸着装置にセ
ットし、フィルムのカール内面に、目的に応じた金属を
所定の膜抵抗になるように蒸着する。この蒸着フィルム
をスリットし、コンデンサ素子を作るための２リール一
対の蒸着リールとする。The film thus obtained is set in a vacuum vapor deposition apparatus, and a metal suitable for the purpose is vapor-deposited on the inner surface of the curl of the film so as to have a predetermined film resistance. The vapor-deposited film is slit to form a pair of 2-reel vapor-deposition reels for making a capacitor element.
【００２７】こうして得た金属化ポリプロピレンフィル
ムを例えば巻回した後、熱プレスして偏平型に成形し、
端部の金属溶射、リード取り出し、外装を経てコンデン
サとする。The metallized polypropylene film thus obtained is wound, for example, and then hot pressed to form a flat mold,
The metal is sprayed on the ends, the leads are taken out, and the external packaging is used to form a capacitor.
【００２８】[0028]
【物性値の測定法及び評価方法】次に、本発明に用いる
測定法及び評価方法について説明する。[Measurement Method and Evaluation Method of Physical Property Value] Next, the measurement method and evaluation method used in the present invention will be explained.
【００２９】（１）熱収縮率 ＥＩＡＪ ＲＣ−２３４８に従った。但し、幅方向測定
用試料は対象フィルムの全幅を測定長さとした。(1) Heat Shrinkage According to EIAJ RC-2348. However, in the width direction measurement sample, the entire width of the target film was used as the measurement length.
【００３０】（２）カール 金属化ポリプロピレンフィルムを幅１０ｍｍ長さ２００
ｍｍの大きさに長手方向に長く裁断し、該サンプルの一
端を固定して吊し、７０ｇの荷重を掛けた状態で長手方
向の一端から１００ｍｍの点をハサミで素早く切断して
固定した側の切断部のカール回転度とその向きを調べ
る。(2) Curl A metallized polypropylene film with a width of 10 mm and a length of 200
The sample was cut into a size of mm long in the longitudinal direction, one end of the sample was fixed and hung, and a point of 100 mm from the one end in the longitudinal direction was quickly cut with scissors while a load of 70 g was applied. Check the curl rotation degree of the cutting part and its direction.
【００３１】尚、カールの向きは金属化面が内側となる
ものを＋、金属化面が外側となるものを−とした。The curl direction was defined as + when the metallized surface was on the inside and-when the metallized surface was on the outside.
【００３２】（３）容量低下率 コンデンサ素子の初期容量と、この素子を所定の時間加
熱して常温まで冷却した後の容量を、安藤電気製ＬＣＲ
メーター タイプＡＧ４３１１を用いて電圧１Ｖ、周波
数１ｋＨｚの条件で測定した。(3) Capacity decrease rate The initial capacity of the capacitor element and the capacity after heating this element for a predetermined time and cooling to room temperature are LCR manufactured by Ando Electric Co., Ltd.
The measurement was performed using a meter type AG4311 under the conditions of a voltage of 1 V and a frequency of 1 kHz.
【００３３】容量低下率の算出は次式によった。The capacity decrease rate was calculated according to the following equation.
【００３４】[0034]
【数１】 （４）ｔａｎδ コンデンサ素子を加熱して常温まで冷却した後のｔａｎ
δを安藤電気製ＬＣＲメーター タイプＡＧ４３１１を
用いて電圧１Ｖ、周波数１ｋＨｚの条件で測定した。[Equation 1] (4) tan δ tan after heating the capacitor element and cooling it to room temperature
δ was measured under the conditions of a voltage of 1 V and a frequency of 1 kHz using an LCR meter type AG4311 manufactured by Ando Electric.
【００３５】[0035]
【実施例】次に、本発明を実施例に基づいて説明する。EXAMPLES Next, the present invention will be explained based on examples.
【００３６】実施例１ ポリプロピレン樹脂を溶融し、スリットを施したＴダイ
より押出し９０℃の冷却ロールで冷却固化した後、該シ
ートを長さ方向に１４０℃の温度で４．６倍に延伸し、
次いで幅方向に１６０℃の温度で８．５倍に延伸し、さ
らに１６５℃の温度で熱処理し、厚さ５μｍのポリプロ
ピレンフィルムを得た。このフィルムのカール内面にコ
ロナ放電処理した。このフィルムを真空蒸着機中にセッ
トし、カール内面（コロナ放電処理を施した面）に、銅
を核として、亜鉛を膜抵抗が４．０Ω／□になるように
蒸着した。このフィルムをスリットし、全幅３８ｍｍ、
マージン幅１．０ｍｍの金属化ポリプロピレンフィルム
を得た。この金属化ポリプロピレンフィルム一対２リー
ルを用いて素子巻してコンデンサ素子を作った。このコ
ンデンサ素子を１００℃の温度、３０ｋｇ／ｃｍ2 の圧
力で１時間プレスして後、該素子の端面に金属溶射を施
し、この溶射金属からリードを取り出した。このとき、
コンデンサの容量は６μＦであった。次いで、このコン
デンサ素子を９０℃で６時間加熱処理した。この金属化
ポリプロピレンフィルムとコンデンサ素子について評価
を行なった。結果を表１に示す。Example 1 Polypropylene resin was melted, extruded from a slit T-die and cooled and solidified by a chill roll at 90 ° C., and then the sheet was stretched 4.6 times in the length direction at a temperature of 140 ° C. ,
Then, it was stretched 8.5 times in the width direction at a temperature of 160 ° C. and further heat-treated at a temperature of 165 ° C. to obtain a polypropylene film having a thickness of 5 μm. The inner surface of the curl of this film was subjected to corona discharge treatment. This film was set in a vacuum vapor deposition machine, and zinc was vapor-deposited on the inner surface of the curl (the surface subjected to the corona discharge treatment) so that the film resistance was 4.0 Ω / □ with copper as the nucleus. This film is slit, the overall width is 38 mm,
A metallized polypropylene film having a margin width of 1.0 mm was obtained. The metallized polypropylene film was wound on a pair of reels to form a capacitor element. After pressing this capacitor element at a temperature of 100 ° C. and a pressure of 30 kg / cm 2 for 1 hour, the end face of the element was sprayed with metal, and a lead was taken out from this sprayed metal. At this time,
The capacitance of the capacitor was 6 μF. Next, this capacitor element was heat-treated at 90 ° C. for 6 hours. The metallized polypropylene film and the capacitor element were evaluated. The results are shown in Table 1.
【００３７】実施例２ 長さ方向の延伸温度を１３５℃とし、幅方向の延伸温度
を１６０℃とし、さらに熱処理の温度を１６０℃とした
以外は、実施例１と同様に実施した。結果を表１に示
す。Example 2 The procedure of Example 1 was repeated, except that the stretching temperature in the length direction was 135 ° C., the stretching temperature in the width direction was 160 ° C., and the heat treatment temperature was 160 ° C. The results are shown in Table 1.
【００３８】比較例１ 長さ方向の延伸温度を１３５℃とし、幅方向の延伸温度
を１５５℃とし、さらに熱処理の温度を１６０℃とした
以外は、実施例１と同様に実施した。結果を表１に示
す。Comparative Example 1 The procedure of Example 1 was repeated, except that the stretching temperature in the length direction was 135 ° C., the stretching temperature in the width direction was 155 ° C., and the heat treatment temperature was 160 ° C. The results are shown in Table 1.
【００３９】比較例２ ポリプロピレンフィルムのカール外面にコロナ放電処理
を施し、カール外面（コロナ放電処理を施した面）に蒸
着した以外は、実施例１と同様に実施した。Comparative Example 2 The procedure of Example 1 was repeated except that the curl outer surface of the polypropylene film was subjected to corona discharge treatment, and the curl outer surface (corona discharge treated surface) was vapor-deposited.
【００４０】[0040]
【表１】 実施例３ ポリプロピレン樹脂を溶融し、スリットを施したＴダイ
より押出し８５℃の冷却ロールで冷却固化した後、該シ
ートを長さ方向に１４０℃の温度で４．５倍に延伸し、
次いで幅方向に１６０℃の温度で８．１倍に延伸し、さ
らに１６０℃の温度で熱処理し、厚さ３．５μｍのポリ
プロピレンフィルムを得た。このフィルムのカール内面
にコロナ放電処理した。このフィルムを真空蒸着機中に
セットし、カール内面（コロナ放電処理を施した面）
に、銅を核として亜鉛を膜抵抗が有効部７．０Ω／□、
ヘビーエッジ部３．０Ω／□になるようにヘビーエッジ
構造の蒸着を施した。このフィルムをスリットし、全幅
３０ｍｍ、マージン幅１．０ｍｍの金属化ポリプロピレ
ンフィルムを得た。この金属化ポリプロピレンフィルム
一対２リールを用いて素子巻してコンデンサ素子を作っ
た。このコンデンサ素子を１００℃の温度、５０ｋｇ／
ｃｍ2 の圧力で５時間プレスして後、該素子の端面に金
属溶射を施し、この溶射金属からリードを取り出した。
このとき、コンデンサの容量は１５μＦであった。次い
で、このコンデンサ素子を１２０℃で３時間加熱処理し
た。この金属化ポリプロピレンフィルムとコンデンサ素
子について評価を行なった。結果を表２に示す。[Table 1] Example 3 Polypropylene resin was melted, extruded from a slit T die, cooled and solidified with a cooling roll of 85 ° C., and then stretched 4.5 times in the length direction at a temperature of 140 ° C.
Then, the film was stretched 8.1 times in the width direction at a temperature of 160 ° C. and further heat-treated at a temperature of 160 ° C. to obtain a polypropylene film having a thickness of 3.5 μm. The inner surface of the curl of this film was subjected to corona discharge treatment. This film is set in a vacuum vapor deposition machine and the inner surface of the curl (the surface that has been subjected to corona discharge treatment)
In addition, the effective part of the film resistance is 7.0Ω / □ with zinc as the core and zinc as the core.
The heavy-edge structure was vapor-deposited so that the heavy-edge portion was 3.0Ω / □. This film was slit to obtain a metallized polypropylene film having a total width of 30 mm and a margin width of 1.0 mm. The metallized polypropylene film was wound on a pair of reels to form a capacitor element. This capacitor element is heated at 100 ° C, 50 kg /
After pressing at a pressure of cm 2 for 5 hours, the end face of the element was sprayed with metal, and the lead was taken out from this sprayed metal.
At this time, the capacitance of the capacitor was 15 μF. Next, this capacitor element was heat-treated at 120 ° C. for 3 hours. The metallized polypropylene film and the capacitor element were evaluated. The results are shown in Table 2.
【００４１】実施例４ 熱処理温度を１５５℃とした以外は、実施例３と同様に
実施した。結果を表２に示す。Example 4 Example 4 was repeated except that the heat treatment temperature was 155 ° C. The results are shown in Table 2.
【００４２】実施例５ 膜抵抗を有効部４．０Ω／□、ヘビーエッジ部２．０Ω
／□とした以外は、実施例３と同様に実施した。結果を
表２に示す。Example 5 Membrane resistance was 4.0 Ω / □ for the effective part and 2.0 Ω for the heavy edge part.
It carried out like Example 3 except having set it as / □. The results are shown in Table 2.
【００４３】比較例３ 長さ方向の延伸温度を１３５℃にし、幅方向の延伸温度
を１５５℃とした以外は、実施例３と同様に実施した。
結果を表２に示す。Comparative Example 3 The procedure of Example 3 was repeated, except that the stretching temperature in the length direction was 135 ° C. and the stretching temperature in the width direction was 155 ° C.
The results are shown in Table 2.
【００４４】比較例４ ポリプロピレンフィルムのカール外面にコロナ放電処理
を施し、カール外面（コロナ放電処理を施した面）に蒸
着した以外は、実施例３と同様に実施した。Comparative Example 4 The procedure of Example 3 was repeated except that the curl outer surface of the polypropylene film was subjected to corona discharge treatment and the curl outer surface (corona discharge treated surface) was vapor-deposited.
【００４５】[0045]
【表２】 [Table 2]
【００４６】[0046]
【発明の効果】本発明により、容量低下率が小さく、か
つｔａｎδ特性の安定した偏平型コンデンサを達成出来
るコンデンサ用金属化ポリプロピレンフィルムを得るこ
とが出来た。According to the present invention, it is possible to obtain a metallized polypropylene film for capacitors, which can achieve a flat type capacitor having a small capacity reduction rate and stable tan δ characteristics.
Claims (1)
４．０％以下、幅方向で０．８％以下であって、かつ金
属化前のフィルムのカール内面を金属化したことを特徴
とするコンデンサ用金属化ポリプロピレンフィルム。1. A heat shrinkage ratio at 120 ° C. is 4.0% or less in the length direction and 0.8% or less in the width direction, and the curl inner surface of the film before metallization is metallized. A metallized polypropylene film for capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19366193A JP3269709B2 (en) | 1993-08-04 | 1993-08-04 | Metallized polypropylene film for flat type capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19366193A JP3269709B2 (en) | 1993-08-04 | 1993-08-04 | Metallized polypropylene film for flat type capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0750224A true JPH0750224A (en) | 1995-02-21 |
| JP3269709B2 JP3269709B2 (en) | 2002-04-02 |
Family
ID=16311673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19366193A Expired - Lifetime JP3269709B2 (en) | 1993-08-04 | 1993-08-04 | Metallized polypropylene film for flat type capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3269709B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0769371A2 (en) * | 1995-10-20 | 1997-04-23 | Hoechst Aktiengesellschaft | Metallized polyolefin film |
| WO2007114647A1 (en) * | 2006-04-05 | 2007-10-11 | Samyoung Chemical Co., Ltd. | Manufacturing method of ultra thin high temperature resistant polypropylene dielectric film for capacitor |
| US20120008251A1 (en) * | 2010-07-12 | 2012-01-12 | Wei-Ching Yu | Film capacitors comprising melt-stretched films as dielectrics |
| WO2015146893A1 (en) * | 2014-03-28 | 2015-10-01 | 東レ株式会社 | Biaxially oriented polypropylene film |
-
1993
- 1993-08-04 JP JP19366193A patent/JP3269709B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0769371A2 (en) * | 1995-10-20 | 1997-04-23 | Hoechst Aktiengesellschaft | Metallized polyolefin film |
| EP0769371A3 (en) * | 1995-10-20 | 1999-02-10 | Ticona GmbH | Metallized polyolefin film |
| AU723676B2 (en) * | 1995-10-20 | 2000-08-31 | Ticona Gmbh | Metalized polyolefin film |
| KR100467895B1 (en) * | 1995-10-20 | 2005-04-28 | 티코나 게엠베하 | Single-layer or multi-layer polyolefin film with metal coating on one or both sides |
| WO2007114647A1 (en) * | 2006-04-05 | 2007-10-11 | Samyoung Chemical Co., Ltd. | Manufacturing method of ultra thin high temperature resistant polypropylene dielectric film for capacitor |
| KR100779040B1 (en) * | 2006-04-05 | 2007-11-28 | 삼영화학공업주식회사 | Manufacturing method of ultra thin high temperature resistant polypropylene dielectric film for capacitor |
| US20120008251A1 (en) * | 2010-07-12 | 2012-01-12 | Wei-Ching Yu | Film capacitors comprising melt-stretched films as dielectrics |
| WO2015146893A1 (en) * | 2014-03-28 | 2015-10-01 | 東レ株式会社 | Biaxially oriented polypropylene film |
| JP5920538B2 (en) * | 2014-03-28 | 2016-05-18 | 東レ株式会社 | Biaxially oriented polypropylene film |
| JPWO2015146893A1 (en) * | 2014-03-28 | 2017-04-13 | 東レ株式会社 | Biaxially oriented polypropylene film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3269709B2 (en) | 2002-04-02 |
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