JP2013243182A - Metalized film capacitor - Google Patents

Metalized film capacitor Download PDF

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JP2013243182A
JP2013243182A JP2012114045A JP2012114045A JP2013243182A JP 2013243182 A JP2013243182 A JP 2013243182A JP 2012114045 A JP2012114045 A JP 2012114045A JP 2012114045 A JP2012114045 A JP 2012114045A JP 2013243182 A JP2013243182 A JP 2013243182A
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capacitor
film
nanotube
capacitor element
metallized
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JP5916216B2 (en
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Yoshio Kasahara
良雄 笠原
Hiroyuki Hama
浩之 濱
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Okaya Electric Industry Co Ltd
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PROBLEM TO BE SOLVED: To provide a metalized film capacitor which is excellent in heat resistance and prevents characteristic deterioration even when being heated by high temperature heat from the exterior.SOLUTION: Multiple metalized films 18, each of which is formed by depositing a metal film 16 on a surface of a dielectric film 12 so as to form a margin part 14 along one side, are laminated or wound in a lamination manner so that the margin parts 14 of the adjacent metalized films 18 are disposed at the opposite ends to form a capacitor element 20. Further, a metalized film capacitor 10 is formed by forming metallikon electrodes 22 on both end surfaces of the capacitor element 20. An outer surface of the capacitor element 20 is coated by an insulative exterior material 24 formed by a high heat resistant nano-tube film.

Description

この発明は誘電体フィルムの表面に金属膜を蒸着して成る複数の金属化フィルムを積層又は積層巻回してコンデンサ素子を形成すると共に、該コンデンサ素子の両端面にメタリコン電極を形成して成る金属化フィルムコンデンサに関し、特に、耐熱性に優れた金属化フィルムコンデンサに関する。   In the present invention, a capacitor element is formed by laminating or winding a plurality of metallized films formed by vapor-depositing a metal film on the surface of a dielectric film, and a metallicon electrode is formed on both end faces of the capacitor element. In particular, the present invention relates to a metallized film capacitor having excellent heat resistance.

誘電体フィルムの表面に金属膜を蒸着させた複数の金属化フィルムを積層又は積層巻回して成るコンデンサ素子を用いた金属化フィルムコンデンサは、コンデンサ素子に部分的な絶縁破壊を生じても再び絶縁性を回復する自己回復性に優れているため、家庭用電気製品をはじめとする種々の電気・電子機器等に広く用いられている。   A metallized film capacitor using a capacitor element that is formed by laminating or winding a plurality of metallized films with a metal film deposited on the surface of a dielectric film is insulated again even if partial dielectric breakdown occurs in the capacitor element. It is widely used in various electric and electronic devices such as household electric appliances because of its excellent self-healing property.

この金属化フィルムコンデンサは、図５及び図６に示すように、誘電体フィルム70の表面に、一側辺に沿ってマージン部72が形成されるように金属膜74を蒸着して金属化フィルム76を構成し、斯かる構造を有する一対の金属化フィルム76，76を、それぞれのマージン部72が反対側に配されるように積層又は積層巻回してコンデンサ素子78を形成すると共に、該コンデンサ素子78の両端面に電極材料を溶射してメタリコン電極80を形成することにより金属化フィルムコンデンサ82が構成される。   As shown in FIGS. 5 and 6, the metallized film capacitor is formed by depositing a metal film 74 on the surface of the dielectric film 70 so that a margin portion 72 is formed along one side. The capacitor element 78 is formed by laminating or laminating a pair of metallized films 76 and 76 having such a structure so that the margin portions 72 are arranged on the opposite side, and forming the capacitor element 78. A metallized electrode capacitor 80 is formed by spraying an electrode material on both end faces of the element 78 to form a metallized film capacitor 82.

尚、上記構造の金属化フィルムコンデンサ82は、例えば、特開２００３−５９７４７号公報（図４参照）に開示されている。   The metallized film capacitor 82 having the above structure is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-59747 (see FIG. 4).

特開２００３−５９７４７号公報JP 2003-59747 A

従来、上記金属化フィルムコンデンサ82を構成する誘電体フィルム70としてはポリプロピレンやポリエステル等が用いられているが、例えばポリプロピレンの耐熱温度は約８５℃、ポリエステルの耐熱温度は約１２５℃と低いため、通常の温度条件（２６０℃）でハンダ付を行うと、高温で加熱されることにより誘電体フィルム70が熱変形し、静電容量の変動や絶縁耐力の低下といったコンデンサの諸特性に悪影響を及ぼすこととなる。   Conventionally, as the dielectric film 70 constituting the metallized film capacitor 82, polypropylene, polyester or the like is used. For example, the heat resistance temperature of polypropylene is about 85 ° C., and the heat resistance temperature of polyester is about 125 ° C. When soldering is performed under normal temperature conditions (260 ° C.), the dielectric film 70 is thermally deformed by being heated at a high temperature, which adversely affects various characteristics of the capacitor, such as a change in capacitance and a decrease in dielectric strength. It will be.

また、自動車用電気回路や太陽光発電用電気回路に組み込まれる金属化フィルムコンデンサ82は高温環境下で使用されることが多く、外部から高温で加熱されることにより誘電体フィルム70が熱変形し、コンデンサの特性劣化を生じるおそれがあった。   In addition, the metallized film capacitor 82 incorporated in the electric circuit for automobiles and the electric circuit for photovoltaic power generation is often used in a high temperature environment, and the dielectric film 70 is thermally deformed by being heated from the outside at a high temperature. There was a risk of deterioration of capacitor characteristics.

この発明は、従来の上記問題に鑑みてなされたものであり、その目的とするところは、外部から高温で加熱された場合にあっても特性劣化を生じることのない耐熱性に優れた金属化フィルムコンデンサを実現することにある。   The present invention has been made in view of the above-described conventional problems, and the object of the present invention is to provide a metallization excellent in heat resistance that does not cause deterioration of characteristics even when heated at a high temperature from the outside. It is to realize a film capacitor.

上記目的を達成するため、本発明の請求項１に記載の金属化フィルムコンデンサは、
一側辺に沿ってマージン部が形成されるように、誘電体フィルムの表面に金属膜を蒸着して成る複数の金属化フィルムを、上記複数の金属化フィルム同士のマージン部が反対側に配されるように積層し、又は積層巻回してコンデンサ素子を形成すると共に、該コンデンサ素子の両端面にメタリコン電極を形成して成る金属化フィルムコンデンサであって、
上記コンデンサ素子の外表面を、ナノチューブを含有する絶縁性を備えた高耐熱性の外装材で被覆したことを特徴とする。 In order to achieve the above object, a metallized film capacitor according to claim 1 of the present invention comprises:
A plurality of metallized films formed by depositing a metal film on the surface of the dielectric film so that a margin part is formed along one side, and the margins between the metallized films are arranged on the opposite side. And a metallized film capacitor formed by forming metallicon electrodes on both end faces of the capacitor element.
The outer surface of the capacitor element is covered with a highly heat-resistant exterior material having an insulating property containing nanotubes.

本発明の請求項２に記載の金属化フィルムコンデンサは、請求項１に記載の金属化フィルムコンデンサにおいて、
上記コンデンサ素子の外表面を、ナノチューブフィルムより成る外装材で被覆したことを特徴とする。 The metallized film capacitor according to claim 2 of the present invention is the metallized film capacitor according to claim 1,
The outer surface of the capacitor element is covered with an exterior material made of a nanotube film.

本発明の請求項３に記載の金属化フィルムコンデンサは、請求項１に記載の金属化フィルムコンデンサにおいて、
上記コンデンサ素子の外表面を、ナノチューブパウダーが分散された外装材で被覆したことを特徴とする。 The metallized film capacitor according to claim 3 of the present invention is the metallized film capacitor according to claim 1,
The outer surface of the capacitor element is covered with an exterior material in which nanotube powder is dispersed.

本発明の請求項４に記載の金属化フィルムコンデンサは、請求項１乃至３の何れかにに記載の金属化フィルムコンデンサにおいて、
上記ナノチューブが、カーボンナノチューブ又は窒化ホウ素ナノチューブであることを特徴とする。 The metallized film capacitor according to claim 4 of the present invention is the metallized film capacitor according to any one of claims 1 to 3,
The nanotube is a carbon nanotube or a boron nitride nanotube.

本発明の金属化フィルムコンデンサにあっては、コンデンサ素子の外表面を、ナノチューブフィルムより成る外装材やナノチューブパウダーが分散された外装材等、ナノチューブを含有する絶縁性を備えた高耐熱性の外装材で被覆したので、ハンダ付時や高温環境下での使用時に外部から高温で加熱されても、誘電体フィルムが熱変形してコンデンサの特性劣化を生じることが防止され、耐熱性に優れた金属化フィルムコンデンサを実現することができる。   In the metallized film capacitor of the present invention, the outer surface of the capacitor element has a high heat-resistant exterior having an insulating property containing nanotubes, such as an exterior material made of a nanotube film or an exterior material in which nanotube powder is dispersed. Because it is coated with a material, even if it is heated at high temperatures from the outside during soldering or when used in a high temperature environment, the dielectric film is prevented from being thermally deformed to cause deterioration of the capacitor characteristics, and has excellent heat resistance A metallized film capacitor can be realized.

上記ナノチューブとして、炭素原子の６員環の連続より成るグラファイト構造体が円筒状になった黒色の微細物質であり、高耐熱性、高強度性、高熱伝導性、難燃性等の特性を備えたカーボンナノチューブを用いることにより、耐熱性に優れた金属化フィルムコンデンサを実現できる。   The above nanotube is a black fine substance with a cylindrical graphite structure consisting of a continuous 6-membered ring of carbon atoms, and has characteristics such as high heat resistance, high strength, high thermal conductivity, and flame retardancy. By using the carbon nanotubes, a metalized film capacitor having excellent heat resistance can be realized.

また、上記ナノチューブとして、窒化ホウ素から成るナノチューブ構造を有する白色の微細物質であり、カーボンナノチューブと同様に、高耐熱性、高強度性、高熱伝導性、難燃性等の特性を備えた窒化ホウ素ナノチューブを用いることにより、耐熱性に優れた金属化フィルムコンデンサを実現できる。   In addition, the nanotube is a white fine substance having a nanotube structure made of boron nitride and, like the carbon nanotube, boron nitride having characteristics such as high heat resistance, high strength, high thermal conductivity, and flame retardancy By using the nanotube, a metallized film capacitor having excellent heat resistance can be realized.

図１は、本発明に係る第１の金属化フィルムコンデンサ10を示す概略断面図であり、該第１の金属化フィルムコンデンサ10は、図２に示すように、ポリプロピレンやポリエステル等より成る誘電体フィルム12の表面に、一側辺に沿ってマージン部14が形成されるように金属膜16を10nm〜80nmの厚さで蒸着して成る一対の金属化フィルム18を、それぞれのマージン部14が反対側に配されるように積層又は積層巻回し、これにヒートプレスを施してコンデンサ素子20を形成して成る（図３）。
また、上記コンデンサ素子20の両端面に電極材料を溶射することによりメタリコン電極22を形成している。 FIG. 1 is a schematic cross-sectional view showing a first metallized film capacitor 10 according to the present invention. As shown in FIG. 2, the first metallized film capacitor 10 is a dielectric made of polypropylene, polyester or the like. A pair of metallized films 18 formed by depositing a metal film 16 with a thickness of 10 nm to 80 nm on the surface of the film 12 so that a margin portion 14 is formed along one side, and each margin portion 14 The capacitor element 20 is formed by stacking or winding the layers so as to be disposed on the opposite side and subjecting them to heat pressing (FIG. 3).
Further, the metallicon electrode 22 is formed by spraying an electrode material on both end faces of the capacitor element 20.

上記金属膜16はアルミニウムで構成されている。このように、金属膜16を「アルミニウム」で構成した場合には、高耐湿性が実現されると共に、金属化フィルムコンデンサ10に高調波が印可された際の「鳴き」の発生を抑制することができる。
斯かる金属化フィルムコンデンサ10の「鳴き」とは、コンデンサに交流電圧が印加された際に電極間にクーロン力が働き、クーロン力の周期的変化により金属化フィルム18が振動して発する音のことであり、振動が可聴周波数範囲（20Hz〜20kHz）である場合にうなり音として聞こえるものである。 The metal film 16 is made of aluminum. As described above, when the metal film 16 is made of “aluminum”, high moisture resistance is realized and generation of “squeal” when harmonics are applied to the metallized film capacitor 10 is suppressed. Can do.
Such a “squeal” of the metallized film capacitor 10 means that the sound generated by the vibration of the metallized film 18 due to the Coulomb force acting between the electrodes when an AC voltage is applied to the capacitor and the periodic change of the Coulomb force. That is, when the vibration is in the audible frequency range (20 Hz to 20 kHz), it can be heard as a beat sound.

本発明の金属化フィルムコンデンサ10の如く、「アルミニウム」を誘電体フィルム12に蒸着させる金属膜16の構成材料として用いた場合には、他の材料（例えば亜鉛やアルミニウム−亜鉛合金等）に比べて「アルミニウム」は凝着力が大きく、ヒートプレスしてコンデンサ素子20を形成すると金属化フィルム18間の密着性が高くなることから、「鳴き」の発生を抑制することができるのである。   When “aluminum” is used as a constituent material of the metal film 16 to be deposited on the dielectric film 12 as in the metallized film capacitor 10 of the present invention, compared to other materials (for example, zinc and aluminum-zinc alloy). Thus, “aluminum” has a large adhesive force, and when the capacitor element 20 is formed by heat pressing, the adhesion between the metallized films 18 becomes high, so that the occurrence of “squeal” can be suppressed.

図１に示すように、上記コンデンサ素子20の外表面は、ナノチューブフィルムより成る絶縁性を備えた高耐熱性の外装材24で被覆されている。
コンデンサ素子20の外表面をナノチューブフィルムで被覆するには、例えば、コンデンサ素子27両端のメタリコン電極28間の長さより長尺なナノチューブフィルムでコンデンサ素子27及びメタリコン電極28を巻回後、ナノチューブフィルムの巻回始端部と巻回終端部とを重ね合わせて絶縁性接着剤等を介して接合すると共に、図１に示すようにナノチューブフィルムの両端部も重ね合わせた状態で絶縁性接着剤等（図示省略）を介して接合すれば良い。或いは、コンデンサ素子27両端のメタリコン電極28間の長さより長尺な一対のナノチューブフィルムを用い、斯かる一対のナノチューブフィルムでコンデンサ素子27及びメタリコン電極28を上下方向から覆った後、一対のナノチューブフィルムの外周端部同士を重ね合わせた状態で接合しても良い。 As shown in FIG. 1, the outer surface of the capacitor element 20 is covered with a highly heat-resistant exterior material 24 having an insulating property made of a nanotube film.
To coat the outer surface of the capacitor element 20 with a nanotube film, for example, after winding the capacitor element 27 and the metallicon electrode 28 with a nanotube film longer than the length between the metallicon electrodes 28 at both ends of the capacitor element 27, the nanotube film The winding start end and the winding end are overlapped and joined via an insulating adhesive or the like, and as shown in FIG. (Omitted). Alternatively, a pair of nanotube films having a length longer than the length between the metallicon electrodes 28 at both ends of the capacitor element 27 are used, and the capacitor element 27 and the metallicon electrode 28 are covered with the pair of nanotube films from above and below, and then the pair of nanotube films You may join in the state which piled up the outer peripheral edge parts.

上記ナノチューブフィルムを構成するナノチューブとしては、カーボンナノチューブ（ＣＮＴ）又は窒化ホウ素ナノチューブ（ＢＮＮＴ）を好適に用いることができる。
カーボンナノチューブは、炭素原子の６員環の連続より成るグラファイト構造体が円筒状になった直径が２ｎｍ〜数十ｎｍ程度、長さが０．５〜１μｍ程度の黒色の微細物質であり、高耐熱性、高強度性、高熱伝導性、難燃性等の優れた特性を備えている。カーボンナノチューブには導電性のものと絶縁性のものがあるが、本発明においては絶縁性のカーボンナノチューブを用いる。
尚、カーボンナノチューブは、単層カーボンナノチューブだけでなく、円筒状のグラファイト構造体が複数同心円状に重なって形成された多層カーボンナノチューブを用いることもできる。 As the nanotubes constituting the nanotube film, carbon nanotubes (CNT) or boron nitride nanotubes (BNNT) can be suitably used.
A carbon nanotube is a black fine substance having a diameter of about 2 nm to several tens of nm and a length of about 0.5 to 1 μm, in which a graphite structure composed of a continuous six-membered ring of carbon atoms is cylindrical. It has excellent properties such as heat resistance, high strength, high thermal conductivity, and flame retardancy. There are conductive and insulating carbon nanotubes. In the present invention, insulating carbon nanotubes are used.
The carbon nanotubes may be not only single-walled carbon nanotubes but also multi-walled carbon nanotubes formed by overlapping a plurality of cylindrical graphite structures concentrically.

また、窒化ホウ素ナノチューブは、窒化ホウ素から成るナノチューブ構造を有し、直径が３０ｎｍ〜１００ｎｍ程度、長さが数μｍ程度の白色の微細物質であり、カーボンナノチューブと同様に、高耐熱性、高強度性、高熱伝導性、難燃性等の優れた特性を備えている。尚、窒化ホウ素ナノチューブは絶縁体である。   Boron nitride nanotubes have a nanotube structure made of boron nitride, are white fine substances having a diameter of about 30 nm to 100 nm and a length of about several μm. Like carbon nanotubes, they have high heat resistance and high strength. Excellent properties such as heat resistance, high thermal conductivity, and flame retardancy. Boron nitride nanotubes are insulators.

上記ナノチューブフィルムは、例えば、ポリカーボネート等の絶縁性樹脂溶媒中にパウダー状のカーボンナノチューブ又は窒化ホウ素ナノチューブを分散して成る溶液を、溶媒キャスト法により製膜、乾燥後に延伸することにより形成することができ、絶縁性樹脂中に高耐熱性のナノチューブが分散されているので高耐熱性のナノチューブフィルムが形成される。   The nanotube film can be formed, for example, by forming a solution obtained by dispersing powdered carbon nanotubes or boron nitride nanotubes in an insulating resin solvent such as polycarbonate, and then stretching the film after drying by a solvent casting method. In addition, since the high heat-resistant nanotubes are dispersed in the insulating resin, a high heat-resistant nanotube film is formed.

図１において、26はリード端子であり、該リード端子の先端はメタリコン電極22に接続されると共に、後端は上記外装材24を突き抜けて外部へ導出されている。   In FIG. 1, reference numeral 26 denotes a lead terminal. The leading end of the lead terminal is connected to the metallicon electrode 22, and the rear end penetrates the exterior material 24 and is led out to the outside.

図４は本発明に係る第２の金属化フィルムコンデンサ30を示すものである。尚、上記第１の金属化フィルムコンデンサ10と同一の構成部材には同一の符号を付してその説明を省略する。
図４に示す本発明に係る第２の金属化フィルムコンデンサ30は、コンデンサ素子27の外表面を、カーボンナノチューブ又は窒化ホウ素ナノチューブ等のナノチューブパウダーが分散された絶縁性を有する高耐熱性の外装材32で被覆した点に特徴を有するものである。 FIG. 4 shows a second metallized film capacitor 30 according to the present invention. In addition, the same code | symbol is attached | subjected to the same component as the said 1st metallized film capacitor | condenser 10, and the description is abbreviate | omitted.
The second metallized film capacitor 30 according to the present invention shown in FIG. 4 is a highly heat-resistant exterior material having an insulating property in which nanotube powder such as carbon nanotubes or boron nitride nanotubes is dispersed on the outer surface of the capacitor element 27. It is characterized by the point covered with 32.

コンデンサ素子20の外表面をナノチューブパウダーが分散された外装材32で被覆するには、例えば、ペースト状と成された熱硬化性の絶縁性樹脂中に、カーボンナノチューブ又は窒化ホウ素ナノチューブより成るナノチューブパウダーを混合・分散させた後、上記ペースト状の絶縁性樹脂をコンデンサ素子27及びメタリコン電極28の外表面に塗布した後、加熱・硬化させれば良い。
このように絶縁性樹脂中に高耐熱性のナノチューブパウダーを分散させることにより、高耐熱性の外装材32が形成される。 In order to coat the outer surface of the capacitor element 20 with the outer packaging material 32 in which the nanotube powder is dispersed, for example, a nanotube powder made of carbon nanotubes or boron nitride nanotubes in a paste-like thermosetting insulating resin Is mixed and dispersed, and the paste-like insulating resin is applied to the outer surfaces of the capacitor element 27 and the metallicon electrode 28, and then heated and cured.
Thus, the highly heat-resistant outer packaging material 32 is formed by dispersing the highly heat-resistant nanotube powder in the insulating resin.

本発明にあっては、コンデンサ素子20の外表面を、ナノチューブフィルムより成る高耐熱性の外装材24（第１の金属化フィルムコンデンサ10の場合）、又はナノチューブパウダーが分散された高耐熱性の外装材32（第２の金属化フィルムコンデンサ30の場合）で被覆したので、ハンダ付時や高温環境下での使用時に外部から高温で加熱されても、誘電体フィルム12が熱変形してコンデンサの特性劣化を生じることが防止され、耐熱性に優れた金属化フィルムコンデンサ10，30を実現することができる。   In the present invention, the outer surface of the capacitor element 20 is formed on the outer surface 24 of the high heat resistance made of a nanotube film (in the case of the first metallized film capacitor 10) or the high heat resistance in which the nanotube powder is dispersed. Since it is covered with the outer packaging material 32 (in the case of the second metallized film capacitor 30), the dielectric film 12 is thermally deformed even if it is heated from outside at the time of soldering or use in a high temperature environment. Therefore, the metallized film capacitors 10 and 30 having excellent heat resistance can be realized.

上記においては、コンデンサ素子20の外表面をナノチューブフィルムより成る外装材24（第１の金属化フィルムコンデンサ10の場合）、ナノチューブパウダーが分散された外装材32（第２の金属化フィルムコンデンサ30の場合）を例示したが、本発明はこれに限定されるものではなく、コンデンサ素子20の外表面がナノチューブを含有する絶縁性を備えた高耐熱性の外装材で被覆されていれば良い。   In the above, the outer surface of the capacitor element 20 is made of the exterior material 24 made of a nanotube film (in the case of the first metallized film capacitor 10), the exterior material 32 in which the nanotube powder is dispersed (the second metallized film capacitor 30). However, the present invention is not limited to this, and it is sufficient that the outer surface of the capacitor element 20 is covered with a highly heat-resistant exterior material having an insulating property containing nanotubes.

本発明に係る第１の金属化フィルムコンデンサを示す概略断面図である。It is a schematic sectional drawing which shows the 1st metallized film capacitor based on this invention. 一対の金属化フィルムを積層する状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which laminates | stacks a pair of metallized film. コンデンサ素子を示す概略断面図である。It is a schematic sectional drawing which shows a capacitor | condenser element. 本発明に係る第２の金属化フィルムコンデンサを示す概略断面図である。It is a schematic sectional drawing which shows the 2nd metallized film capacitor based on this invention. 一対の従来の金属化フィルムを積層する状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which laminates | stacks a pair of conventional metallized film. 従来の金属化フィルムコンデンサを示す概略断面図である。It is a schematic sectional drawing which shows the conventional metallized film capacitor.

10 第１の金属化フィルムコンデンサ
12 誘電体フィルム
14 マージン部
16 金属膜
18 金属化フィルム
20 コンデンサ素子
22 メタリコン電極
24 外装材
26 リード端子
30 第２の金属化フィルムコンデンサ
32 外装材
10 First metallized film capacitor
12 Dielectric film
14 Margin
16 Metal film
18 Metallized film
20 Capacitor element
22 Metallicon electrode
24 Exterior material
26 Lead terminal
30 Second metallized film capacitor
32 Exterior material

Claims (4)

一側辺に沿ってマージン部が形成されるように、誘電体フィルムの表面に金属膜を蒸着して成る複数の金属化フィルムを、上記複数の金属化フィルム同士のマージン部が反対側に配されるように積層し、又は積層巻回してコンデンサ素子を形成すると共に、該コンデンサ素子の両端面にメタリコン電極を形成して成る金属化フィルムコンデンサであって、
上記コンデンサ素子の外表面を、ナノチューブを含有する絶縁性を備えた高耐熱性の外装材で被覆したことを特徴とする金属化フィルムコンデンサ。 A plurality of metallized films formed by depositing a metal film on the surface of the dielectric film so that a margin part is formed along one side, and the margins between the metallized films are arranged on the opposite side. And a metallized film capacitor formed by forming metallicon electrodes on both end faces of the capacitor element.
A metallized film capacitor, wherein the outer surface of the capacitor element is coated with a highly heat-resistant exterior material having an insulating property containing nanotubes. 上記コンデンサ素子の外表面を、ナノチューブフィルムより成る外装材で被覆したことを特徴とする請求項１に記載の金属化フィルムコンデンサ。   2. The metallized film capacitor according to claim 1, wherein an outer surface of the capacitor element is covered with an exterior material made of a nanotube film. 上記コンデンサ素子の外表面を、ナノチューブパウダーが分散された外装材で被覆したことを特徴とする請求項１に記載の金属化フィルムコンデンサ。   2. The metallized film capacitor according to claim 1, wherein the outer surface of the capacitor element is covered with an exterior material in which nanotube powder is dispersed. 上記ナノチューブが、カーボンナノチューブ又は窒化ホウ素ナノチューブであることを特徴とする請求項１乃至３の何れかに記載の金属化フィルムコンデンサ。

4. The metalized film capacitor according to claim 1, wherein the nanotube is a carbon nanotube or a boron nitride nanotube.

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