JPS6317235Y2 - - Google Patents
Info
- Publication number
- JPS6317235Y2 JPS6317235Y2 JP14287281U JP14287281U JPS6317235Y2 JP S6317235 Y2 JPS6317235 Y2 JP S6317235Y2 JP 14287281 U JP14287281 U JP 14287281U JP 14287281 U JP14287281 U JP 14287281U JP S6317235 Y2 JPS6317235 Y2 JP S6317235Y2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- capacitor
- plastic
- film
- composite film
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 14
- 239000011888 foil Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000002650 laminated plastic Substances 0.000 claims description 7
- 239000005001 laminate film Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 description 6
- 229920006255 plastic film Polymers 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Description
本考案は複合フイルムの熱溶着により密封外装
したコンデンサに関する。
最近コンデンサの外装構造として金属ケースと
ゴム栓の代わりに２種以上のプラスチツクフイル
ムからなるプラスチツクフイルムからなるプラス
チツクラミネートフイルムまたは該プラスチツク
ラミネートフイルムの中間に金属箔を介在させた
プラスチツク金属箔ラミネートフイルムからなる
複合フイルムでコンデンサ素子を包み前記複合フ
イルムを熱溶着して密封し外装をほどこしたコン
デンサが提案されている。この種のコンデンサは
端子の厚さまたは直径が0.5〜1.2mmで断面形状が
長方形または円形のため第１図および第２図に示
すように熱溶着したとき複合フイルム１と端子２
との融着部に隙間３が生じる。このため端子２の
融着部が完全に密封できず液もれが発生し、しか
も端子２の四隅の角で複合フイルム１の内層フイ
ルムをつき破り金属箔と接触するなどの欠点があ
る。このような欠点を解決するため端子２の融着
部に感熱型接着剤を塗布したり融点の低いプラス
チツクフイルムを介挿したりして前記隙間３をな
くすようにした提案もなされているが接着剤の塗
布やプラスチツクフイルムの介挿など余分な作業
を必要とし工程が煩雑になる欠点がある。
本考案は上記のような欠点を除去するため端子
の断面形状を台形または弓形にすることによつて
端子の融着部の隙間をなくし液もれのない小形軽
量で量産加工性のよい安価なコンデンサを提供せ
んとするものである。
以下本考案の一実施例につき第３図〜第５図を
参照しながら説明する。まず第３図に示すように
端子１１を取着した扁平状または円柱状のコンデ
ンサ素子１２の上下にそれぞれ耐熱性や耐溶剤性
の異なる２種以上のプラスチツクフイルムを積層
したプラスチツクラミネートフイルムまたは該プ
ラスチツクラミネートフイルムの中間に金属箔を
介在させて積層したプラスチツク金属箔ラミネー
トフイルムからなる複合フイルム１３を配置す
る。前記端子１１は第４図および第５図に示すよ
うに断面形状を台形または弓形に成形しておく。
前記複合フイルム１３はポリエチレンテレフタレ
ート、ポリプロピレン、ポリカーボネート、ポリ
サルホン、アイオノマー、ポリ弗化ビニリデン、
ポリ弗化エチレン、ポリ塩化ビニデリン、ポリブ
チレンテレフタレート、ポリアセタールなどのう
ちの異なる２種以上のプラスチツクフイルムを積
層したプラスチツクラミネートフイルムまたは該
プラスチツクラミネートフイルムの中間にアルミ
ニウム、錫、鉛などの金属箔を介在させて積層し
たプラスチツク金属箔ラミネートフイルムからな
るものである。しかして前記複合フイルム１３を
上下に対向させその間にコンデンサ素子１２を配
置したのち熱板や圧子などのヒートシーラで熱溶
着して密封し前記コンデンサ素子１２の周囲にシ
ール部１４を形成し外装をほどこすものである。
この場合端子１１の断面形状が台形または弓形、
すなわち長方形の両端の角を切りおとしたような
形状に成形したため端子１１の融着部に隙間の生
じることが全くなくなる。このように端子１１の
融着部に隙間がないため密封性がよく液もれが発
生しないのは当然であるが高温高湿雰囲気中で長
時間使用しても吸湿がないので特性の変化がきわ
めて少なく安定した特性を維持できる。また端子
１１の断面形状が台形または弓形で長方形の両端
の角を切りおとしたような形状に成形したため端
子１１の角で複合フイルム１３の内層フイルムを
つき破り中間に介在させた金属箔と前記端子１１
が接触し短絡事故をひきおこすこともなくなる。
つぎに定格100WV.DC−3.3μFのアルミニウムは
く形電解コンデンサにおける本考案の実施例と従
来の参考例との特性比較の一例を表１に示す。い
ずれも複合フイルムは12μポリエチレンテレフタ
レートフイルム−20μアルミニウム箔−100μアイ
オノマ−フイルムからなるプラスチツク金属箔ラ
ミネートフイルムを用いて熱板で熱溶着したもの
で端子の断面形状を変えた場合の初期液もれ不良
率と寿命試験（温度85℃、湿度90％RH、定格電
圧印加1000時間）後の静電容量変化率、誘電正
接、もれ電流の比較である。
The present invention relates to a capacitor hermetically sealed by heat welding a composite film. Recently, as an exterior structure for capacitors, instead of a metal case and a rubber plug, a plastic laminate film made of two or more types of plastic films, or a plastic metal foil laminate film with a metal foil interposed between the plastic laminate films is used. A capacitor has been proposed in which a capacitor element is wrapped in a composite film and the composite film is sealed by heat welding to form an exterior. This type of capacitor has terminals with a thickness or diameter of 0.5 to 1.2 mm and a rectangular or circular cross-section, so when heat welded, the composite film 1 and terminal 2 are bonded together as shown in Figures 1 and 2.
A gap 3 is created at the fused portion. As a result, the fused portion of the terminal 2 cannot be completely sealed, resulting in liquid leakage, and the four corners of the terminal 2 break through the inner film of the composite film 1 and come into contact with the metal foil. In order to solve this problem, some proposals have been made to eliminate the gap 3 by applying a heat-sensitive adhesive to the fused portion of the terminal 2 or by inserting a plastic film with a low melting point. This method has the drawback of complicating the process as it requires extra work such as coating and inserting plastic film. In order to eliminate the above-mentioned drawbacks, the present invention eliminates the gap at the fused part of the terminal by making the cross-sectional shape of the terminal trapezoidal or arcuate, thereby creating a small, lightweight, inexpensive and easily mass-produced product that does not leak liquid. The purpose is to provide capacitors. An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. First, as shown in FIG. 3, a plastic laminate film or a plastic laminate film, in which two or more types of plastic films having different heat resistance and solvent resistance are laminated on the top and bottom of a flat or cylindrical capacitor element 12 with a terminal 11 attached thereto, is first used. A composite film 13 consisting of a plastic metal foil laminate film laminated with a metal foil interposed between the laminate films is arranged. The terminal 11 has a trapezoidal or arcuate cross-sectional shape as shown in FIGS. 4 and 5.
The composite film 13 is made of polyethylene terephthalate, polypropylene, polycarbonate, polysulfone, ionomer, polyvinylidene fluoride,
A plastic laminate film in which two or more different types of plastic films such as polyfluoroethylene, polyviniderine chloride, polybutylene terephthalate, polyacetal, etc. are laminated, or a metal foil such as aluminum, tin, or lead is interposed between the plastic laminate films. It consists of a plastic metal foil laminate film laminated together. After the composite film 13 is placed vertically facing each other and the capacitor element 12 is placed between them, the capacitor element 12 is sealed by thermal welding with a heat sealer such as a hot plate or an indenter to form a seal part 14 around the capacitor element 12, and the exterior is removed. It is something to rub.
In this case, the cross-sectional shape of the terminal 11 is trapezoidal or arcuate,
That is, since the terminal 11 is formed into a shape in which both corners of the rectangle are cut off, there is no gap at all in the fused portion of the terminal 11. Since there is no gap in the fused part of the terminal 11, it is natural that the seal is good and there is no leakage, but even if it is used for a long time in a high-temperature, high-humidity atmosphere, there is no moisture absorption, so there is no change in the characteristics. Extremely low and stable characteristics can be maintained. In addition, since the terminal 11 has a trapezoidal or arcuate cross-sectional shape and is shaped like a rectangle with both corners cut off, the inner layer film of the composite film 13 is broken at the corner of the terminal 11, and the metal foil interposed in the middle and the Terminal 11
This eliminates the possibility of short-circuit accidents caused by contact between the two.
Next, Table 1 shows an example of a characteristic comparison between an embodiment of the present invention and a conventional reference example of an aluminum foil electrolytic capacitor with a rating of 100WV.DC-3.3μF. In both cases, the composite film is a plastic metal foil laminate film consisting of 12μ polyethylene terephthalate film, 20μ aluminum foil, and 100μ ionomer film, which are heat-welded using a hot plate, and there is no initial leakage when the cross-sectional shape of the terminal is changed. This is a comparison of capacitance change rate, dielectric loss tangent, and leakage current after a life test (temperature 85°C, humidity 90%RH, rated voltage applied for 1000 hours).
【表】【table】
【表】
表１から実施例(A)，(B)は初期液もれ不良率がき
わめて小さく寿命試験後の特性値も小さく参考例
(C)，(D)よりも安定した特性を示す密封性にすぐれ
た効果のあることがわかる。なお上記実施例では
アルミニウムはく形電解コンデンサを例示した
が、タンタル固体電解コンデンサ、プラスチツク
フイルムコンデンサ、紙コンデンサ、磁器コンデ
ンサなどに適用しても同効である。またヒートシ
ーラとして熱板や圧子の代わりにインパルス溶着
機、超音波溶着機、高周波溶着機などを用いても
よいしヒートシーラの熱板や圧子にギザ目やロー
レツトのような凹凸を設けて熱溶着しシール部１
４に凹凸を形成すれば該シール部１４の密封性が
一層向上する。
以上詳述したように本考案によれば端子を取着
したコンデンサ素子を複合フイルムで熱溶着して
密封外装するコンデンサにおいて前記端子の断面
形状を台形または弓形にしたことによつて端子の
融着部の隙間をなくし液もれや吸湿の発生をなく
し短絡事故のない小形軽量で量産加工性のよい安
価なコンデンサを提供することができる。[Table] From Table 1, the initial leakage failure rate of Examples (A) and (B) is extremely low, and the characteristic values after the life test are also low.
It can be seen that this method has an excellent effect in sealing, which shows more stable characteristics than (C) and (D). Although an aluminum foil electrolytic capacitor is exemplified in the above embodiment, it is equally effective when applied to tantalum solid electrolytic capacitors, plastic film capacitors, paper capacitors, ceramic capacitors, etc. Also, instead of the hot plate and indenter of the heat sealer, an impulse welder, ultrasonic welder, high frequency welder, etc. may be used, or the hot plate and indenter of the heat sealer may be provided with irregularities such as serrations or knurls to heat-seal the seal portion 1.
If unevenness is formed on the surface of the capacitor, the sealing performance of the seal portion 14 is further improved. As described above in detail, according to the present invention, in a capacitor in which a capacitor element having terminals attached is heat-welded with a composite film to seal the exterior, by making the cross-sectional shape of the terminals trapezoidal or arched, it is possible to provide a small, lightweight, inexpensive capacitor which is free from short circuit accidents, has good mass-production processability, and has no gaps at the fused portion of the terminals, thereby preventing liquid leakage and moisture absorption.
第１図および第２図はそれぞれ従来の参考例の
コンデンサにおける端子の融着部を示す一部拡大
断面図、第３図は本考案の一実施例に係るコンデ
ンサを示す正面図、第４図および第５図はそれぞ
れ本考案のコンデンサに用いる端子の形状を示す
断面図である。
１１……端子、１２……コンデンサ素子、１３
……複合フイルム、１４……シール部。
1 and 2 are partially enlarged cross-sectional views showing the fused portions of the terminals in a conventional reference example capacitor, respectively. FIG. 3 is a front view showing a capacitor according to an embodiment of the present invention, and FIG. 4 and FIG. 5 are cross-sectional views showing the shapes of terminals used in the capacitor of the present invention. 11...Terminal, 12...Capacitor element, 13
... Composite film, 14 ... Seal part.
Claims (1)
サ素子を密封するプラスチツクラミネートフイル
ムまたはプラスチツク金属箔ラミネートフイルム
からなる複合フイルムと、前記コンデンサ素子の
周囲に形成した前記複合フイルムのシール部とを
具備し、前記端子の断面形状が台形または弓形で
あることを特徴とするコンデンサ。 A capacitor element having a terminal attached thereto, a composite film made of a plastic laminate film or a plastic metal foil laminate film for sealing the capacitor element, and a sealing portion of the composite film formed around the capacitor element, A capacitor characterized by a terminal having a trapezoidal or arcuate cross-sectional shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14287281U JPS5849426U (en) | 1981-09-26 | 1981-09-26 | capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14287281U JPS5849426U (en) | 1981-09-26 | 1981-09-26 | capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5849426U JPS5849426U (en) | 1983-04-04 |
| JPS6317235Y2 true JPS6317235Y2 (en) | 1988-05-16 |
Family
ID=29935885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14287281U Granted JPS5849426U (en) | 1981-09-26 | 1981-09-26 | capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5849426U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4646428B2 (en) * | 2001-03-27 | 2011-03-09 | 京セラ株式会社 | Electrochemical element |
-
1981
- 1981-09-26 JP JP14287281U patent/JPS5849426U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5849426U (en) | 1983-04-04 |
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