JP3495265B2 - Method for producing aluminum foil for electrolytic capacitor electrode - Google Patents
Method for producing aluminum foil for electrolytic capacitor electrodeInfo
- Publication number
- JP3495265B2 JP3495265B2 JP32182698A JP32182698A JP3495265B2 JP 3495265 B2 JP3495265 B2 JP 3495265B2 JP 32182698 A JP32182698 A JP 32182698A JP 32182698 A JP32182698 A JP 32182698A JP 3495265 B2 JP3495265 B2 JP 3495265B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum foil
- foil
- electrolytic capacitor
- surface layer
- aluminum
- 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 - Lifetime
Links
- 239000011888 foil Substances 0.000 title claims description 40
- 229910052782 aluminium Inorganic materials 0.000 title claims description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 32
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000003990 capacitor Substances 0.000 title claims description 11
- 238000000137 annealing Methods 0.000 claims description 29
- 239000002344 surface layer Substances 0.000 claims description 22
- 238000005097 cold rolling Methods 0.000 claims description 13
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005530 etching Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000012190 activator Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000010731 rolling oil Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 102220253765 rs141230910 Human genes 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、電解コンデンサ
電極用アルミニウム箔の製造方法に関する。TECHNICAL FIELD The present invention relates to a method for manufacturing an aluminum foil for an electrolytic capacitor electrode.
【０００２】なお、この明細書において、「アルミニウ
ム」の語はアルミニウムおよびその合金の両者を含む意
味で用いられる。In this specification, the term "aluminum" is used to include both aluminum and its alloys.
【０００３】[0003]
【従来の技術】アルミニウム電解コンデンサ電極材とし
て用いられるアルミニウム箔には、その実行面積を拡大
して単位面積当たりの静電容量を増大するため、電気化
学的あるいは化学的エッチング処理が施される。特に、
製品のダウンサイジングに伴う部品の小型化要求から、
高静電容量化へのニーズがますます高まっている。2. Description of the Related Art An aluminum foil used as an electrode material for an aluminum electrolytic capacitor is subjected to an electrochemical or chemical etching process in order to expand its effective area and increase the capacitance per unit area. In particular,
Due to the demand for downsizing of parts due to product downsizing,
There is an ever-increasing need for higher capacitance.
【０００４】しかし、箔を単にエッチングしただけでは
十分な静電容量を得られないため、種々の観点からエッ
チング特性を高めて静電容量の増大を図るための改良が
なされている。その一つの方法として、アルミニウム箔
の表面状態の制御がある。However, since sufficient capacitance cannot be obtained simply by etching the foil, various improvements have been made to improve the etching characteristics and increase the capacitance. One of the methods is to control the surface condition of the aluminum foil.
【０００５】例えば、特開平２−１４８７１１では、熱
間圧延時に付着したＦｅ粉を除去してエッチングむらを
防止することを目的として、熱間圧延後の冷間圧延で圧
下率が９６％を越える前に箔をｐＨ１０以上のアルカリ
液で１〜１００秒間洗浄することが記載されている。ま
た、特開平３−２５７１４７では、箔の最終酸化膜を薄
くすることを目的として、アルミニウム板の厚さ（ｔ）
が３．３Ｔ≦ｔ≦２０Ｔ（Ｔは最終箔厚）を満足する範
囲に圧延された時にアルカリ性または酸性水溶液で洗浄
し、さらに冷間圧延して、熱間圧延および冷間圧延する
間に生じる厚い酸化膜を除去することが記載されてい
る。また、特開平１０−８１９４５では、箔のミラー指
数（１００）面結晶占有率を９２％以上にすることを目
的として、純度９９．９６〜９９．９８％のアルミニウ
ム材に対し、２００〜５００℃で１時間以上中間焼鈍
し、さらに中間焼鈍後最終焼鈍までの間に箔の表層部を
０．１μｍ以上除去することが記載されている。For example, in Japanese Unexamined Patent Publication No. 2-148711, the reduction ratio exceeds 96% in cold rolling after hot rolling for the purpose of removing Fe powder adhered during hot rolling to prevent uneven etching. It is described before that the foil is washed with an alkaline solution having a pH of 10 or more for 1 to 100 seconds. Further, in Japanese Patent Application Laid-Open No. 3-257147, the thickness (t) of an aluminum plate is used for the purpose of thinning the final oxide film of the foil.
Occurs during hot rolling and cold rolling after washing with an alkaline or acidic aqueous solution when rolled to a range satisfying 3.3 T ≦ t ≦ 20 T (T is the final foil thickness). It is described that a thick oxide film is removed. Further, in JP-A-10-81945, 200 to 500 ° C. is applied to an aluminum material having a purity of 99.96 to 99.98% for the purpose of making the Miller index (100) plane crystal occupation rate of the foil 92% or more. It is described that the intermediate layer is annealed for 1 hour or more, and the surface layer portion of the foil is removed by 0.1 μm or more between the intermediate annealing and the final annealing.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述の
各方法によってもエッチング時における箔表面の溶解性
の均一化は不十分であり、静電容量の増大に対する要望
に応えうるものではない。However, even with the above-mentioned methods, the homogeneity of the solubility of the foil surface during etching is insufficient, and it is not possible to meet the demand for an increase in capacitance.
【０００７】この発明は、このような技術背景に鑑み、
箔の表面状態を制御することにより、さらなる静電容量
の増大を見込める電解コンデンサ電極用アルミニウム箔
の製造方法を目的とする。In view of such a technical background, the present invention has been made.
It is an object of the present invention to provide a method for producing an aluminum foil for electrolytic capacitor electrodes, which is expected to further increase the capacitance by controlling the surface condition of the foil.
【０００８】[0008]
【課題を解決するための手段】この発明者らは、鋭意研
究の結果、中間焼鈍において形成される表面層、特に酸
化膜質が最終焼鈍後の表面状態にまで影響を与え、ひい
てはエッチング特性に影響を与えることを見い出し、こ
の発明の完成に至った。As a result of earnest research, the inventors of the present invention have found that the surface layer formed in the intermediate annealing, particularly the oxide film quality, influences the surface state after the final annealing, which in turn affects the etching characteristics. The present invention has been completed and the present invention has been completed.
【０００９】 即ち、この発明の電解コンデンサ電極用
アルミニウム箔の製造方法は、前記目的を達成するため
に、面削したアルミニウムスラブを均熱処理して熱間圧
延した後、冷間圧延するとともに、冷間圧延の途中で中
間焼鈍を行い、さらに最終焼鈍するアルミニウム箔の製
造方法において、前記中間焼鈍の直前に表面層を除去す
ることを特徴とする。That is, in order to achieve the above-mentioned object, the method for producing an aluminum foil for electrolytic capacitor electrodes of the present invention is characterized in that a chamfered aluminum slab is uniformly heat-treated and hot-rolled, and then cold-rolled. perform intermediate annealing midway between rolling, further in the manufacturing method of an aluminum foil final annealing, and removing a surface layer on the intermediate annealing just before.
【００１０】 この発明において、中間焼鈍の直前に表
面層を除去するのは、表面に付着している圧延油や酸化
膜を除去した状態で中間焼鈍を行って、中間焼鈍時に形
成される表面層の均一化を図る趣旨である。これは、圧
延油や酸化膜が存在したままで中間焼鈍を行うと、焼鈍
によって形成される表面層、特に酸化膜の厚さと質が不
均一になり、かつその後の冷間圧延で該酸化膜が内部に
埋め込まれてしまい、最終焼鈍前に表面洗浄を行っても
酸化膜を均一に除去できず、最終焼鈍によっても均質化
できないからである。その結果、エッチングによる箔の
溶解性が不均一となって、静電容量の増大が望めなくな
る。また、箔の溶解性が不均一になると、コイル内幅方
向、長さ方向、コイル間あるいはロット間で静電容量が
ばらついて、一定の品質を保つことができない。[0010] In this invention, the surface to remove the surface layer before the intermediate annealing straight is that performing intermediate annealing in a state of removal of the rolling oil or oxide film adhering to the surface, is formed during intermediate annealing The purpose is to make the layers uniform. This is because when the intermediate annealing is performed with the rolling oil and the oxide film present, the thickness and quality of the surface layer formed by the annealing, especially the oxide film, becomes non-uniform, and the oxide film is not formed by the subsequent cold rolling. However, even if the surface is washed before the final annealing, the oxide film cannot be uniformly removed, and the oxide film cannot be homogenized even by the final annealing. As a result, the solubility of the foil due to etching becomes non-uniform, and an increase in capacitance cannot be expected. Further, if the solubility of the foil becomes non-uniform, the capacitance varies in the width direction, length direction of the coil, and between the coils or between lots, and it is impossible to maintain a constant quality.
【００１１】 このように、この発明では、中間焼鈍の
直前に表面層を薄く除去することにより、最終焼鈍後に
得られるアルミニウム箔の表面状態を均一にし、ひいて
はエッチング溶解性が均一な電極用アルミニウム箔を製
造することができる。As described above, according to the present invention, the intermediate annealing
By thinning the surface layer is removed just before, the surface condition of the aluminum foil obtained after final annealing and uniform, can thus etching solubility to produce a homogeneous electrode aluminum foil.
【００１２】また、表面層の除去の時期は、次式に示す
冷間圧下率によって制御することが好ましい。Further, the timing of removing the surface layer is preferably controlled by the cold reduction ratio shown in the following equation.
【００１３】
冷間圧下率（％）＝（Ｔ１−Ｔ２）／Ｔ１×１００
但し、Ｔ１：熱間仕上げ圧延後の板厚
Ｔ２：表面層除去時の材料厚
前記冷間圧下率が９６％未満では、中間焼鈍後の圧下率
が高くなるために、その後の冷間圧延によって不均一層
が形成されやすくなり、かつ結晶組織における（１０
０）面積率が低下する傾向にあり、エッチング特性の向
上効果が弱められる。このため、表面層除去を行う時期
は、その後の圧延の不均一層の形成が少なく、エッチン
グ特性の向上効果を期待できる、冷間圧下率が９６％以
上となった時に行うことが好ましい。特に９７％以上の
冷間圧下率の時に行うことが好ましい。Cold rolling reduction (%) = (T1-T2) / T1 × 100 where T1: plate thickness after hot finish rolling T2: material thickness when surface layer is removed The cold rolling reduction is less than 96% In the case of (10), since the rolling reduction after the intermediate annealing is high, a non-uniform layer is likely to be formed by the subsequent cold rolling, and (10
0) The area ratio tends to decrease, and the effect of improving etching characteristics is weakened. Therefore, it is preferable to remove the surface layer when the cold rolling reduction is 96% or more, where the formation of a non-uniform layer in the subsequent rolling is small and the effect of improving the etching characteristics can be expected. It is particularly preferable to carry out at a cold rolling reduction of 97% or more.
【００１４】前記表面層の除去の方法は、化学的除去、
機械的除去のいずれでも良く、特に限定されない。ま
た、化学的除去方法として、有機溶剤洗浄や活性剤洗浄
のいずれでも良いが、活性剤洗浄の方が、材料表面の圧
延油だけでなく圧延工程で形成された不均質な酸化膜も
除去できる、という点で活性剤洗浄を推奨できる。活性
剤の種類は、酸性、アルカリ性のいずれでも良く、硫
酸、硝酸、水酸化ナトリウム、リン酸ナトリウムを例示
できる。また、機械的除去の場合、ショットブラスト、
液体フォーニング等を例示できる。機械的除去の場合
は、処理した仕上げ面が良好である点で液体フォーニン
グを推奨できる。The surface layer is removed by chemical removal,
Any of mechanical removal may be used and is not particularly limited. Further, as the chemical removal method, either organic solvent cleaning or activator cleaning may be performed, but activator cleaning can remove not only rolling oil on the material surface but also a heterogeneous oxide film formed in the rolling process. The activator cleaning can be recommended in terms of. The type of activator may be acidic or alkaline, and examples thereof include sulfuric acid, nitric acid, sodium hydroxide, and sodium phosphate. Also, for mechanical removal, shot blasting,
Liquid forming and the like can be exemplified. In the case of mechanical removal, liquid forming can be recommended because of the good treated surface finish.
【００１５】また、表面層の除去量が多くなるとアルミ
ニウムロス分が多くなり、処理時間が長くなるため、厚
さ方向に０．５μｍ以下が好ましい。特に好ましい除去
量は、０．０１〜０．１μｍである。Further, when the removal amount of the surface layer increases, the amount of aluminum loss increases and the processing time increases, so 0.5 μm or less is preferable in the thickness direction. A particularly preferable removal amount is 0.01 to 0.1 μm.
【００１６】なお、面削、均質化処理、熱間圧延、冷間
圧延の条件は特に限定されず、常法に従う。また、アル
ミニウム材料も、電解コンデンサ電極用箔としてエッチ
ング時の溶解均一性を確保するために常法に従えば良
く、純度が９９．９％以上の高純度材料を使用すること
が好ましい。The conditions for chamfering, homogenizing treatment, hot rolling and cold rolling are not particularly limited, and the usual methods are followed. Further, as the aluminum material, an electrolytic capacitor electrode foil may be formed by a conventional method in order to ensure dissolution uniformity during etching, and it is preferable to use a high-purity material having a purity of 99.9% or more.
【００１７】[0017]
【発明の実施の形態】次に、この発明の電解コンデンサ
電極用アルミニウム箔の製造方法の具体的実施例につい
て説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, specific examples of the method for producing an aluminum foil for electrolytic capacitor electrodes according to the present invention will be described.
【００１８】まず、純度９９．９９％のアルミニウムス
ラブを常法により面削、均熱処理した後、上がり板厚５
mmに熱間圧延し、さらに冷間圧延して厚さ０．６mmの箔
地とした。First, an aluminum slab having a purity of 99.99% is faced by a conventional method and subjected to soaking, and then the ascended plate thickness is 5
It was hot-rolled to mm and cold-rolled to obtain a foil having a thickness of 0.6 mm.
【００１９】そして、実施例１〜８については、前記箔
地を後掲の表１に示す各冷間圧下率まで圧延し、さらに
表１に示す方法と除去量で表面層の除去処理を行い、２
５０℃×１０時間の条件で中間焼鈍を行い、さらに箔厚
０．１mmまで冷間圧延した。In Examples 1 to 8, the foil was rolled to the cold reduction ratio shown in Table 1 below, and the surface layer was removed by the method and removal amount shown in Table 1. Two
Intermediate annealing was performed under the conditions of 50 ° C. for 10 hours, and further cold-rolled to a foil thickness of 0.1 mm.
【００２０】一方、比較例１では箔地の表面層を除去す
ることなく表１に示す圧下率の時に中間焼鈍し、さらに
箔厚０．１mmまで冷間圧延した。比較例２では中間焼鈍
後に表面層除去を行った。比較例３では、圧下率９５．
０％の時に表面層除去を行い、さらに９７．５％まで冷
間圧延した後中間焼鈍し、さらに箔厚０．１mmまで冷間
圧延した。On the other hand, in Comparative Example 1, the intermediate layer was annealed at the reduction ratio shown in Table 1 without removing the surface layer of the foil, and further cold-rolled to a foil thickness of 0.1 mm. In Comparative Example 2, the surface layer was removed after the intermediate annealing. In Comparative Example 3, the rolling reduction is 95.
The surface layer was removed at 0%, cold rolled to 97.5%, intermediate annealed, and cold rolled to a foil thickness of 0.1 mm.
【００２１】なお、アルミニウム箔は、実施例、比較例
ともに幅５００mm×長さ２０００ｍとし、コイル状に巻
き取った。The aluminum foil in each of the examples and comparative examples had a width of 500 mm and a length of 2000 m and was wound into a coil.
【００２２】上述のようにして製造した各アルミニウム
箔について、弱アルカリ系洗浄剤にて洗浄後、不活性ガ
ス雰囲気中で５００℃×１時間の最終焼鈍を行った。Each of the aluminum foils produced as described above was washed with a weak alkaline detergent and then subjected to final annealing at 500 ° C. for 1 hour in an inert gas atmosphere.
【００２３】さらに、これらのアルミニウム箔を７５℃
の１モルＨＣｌと３モル硫酸の混合溶液中で、電流密度
２０Ａ／ｄｍ2 で１００秒間直流エッチングし、さら
に９０℃の硫酸中で８分間浸漬してＥＩＡＪ法で３００
Ｖ化成処理後、静電容量を測定した。静電容量は、コイ
ル内で幅方向および長さ方向において６箇所の異なる位
置からサンプリングした箔片についてそれぞれ測定し
た。表１に、各アルミニウム箔の静電容量の平均値を比
較例１を１００とした時の相対値で示すとともに、位置
による静電容量のばらつきを次式に基づく計算値で示
す。Further, these aluminum foils are treated at 75 ° C.
In a mixed solution of 1 molar HCl and 3 molar sulfuric acid of 20 A / dm 2 Direct current etching for 100 seconds, further immersing in sulfuric acid at 90 ° C. for 8 minutes, and 300 by EIAJ method.
After the V conversion treatment, the capacitance was measured. The capacitance was measured for each foil piece sampled from 6 different positions in the width direction and the length direction in the coil. In Table 1, the average value of the capacitance of each aluminum foil is shown as a relative value when Comparative Example 1 is 100, and the variation of the capacitance depending on the position is shown as a calculated value based on the following formula.
【００２４】静電容量のばらつき（％）＝（Ｃ A −Ｃ
B ）／Ｃ X ×１００
但し、Ｃ A ：静電容量の最大値
Ｃ B ：静電容量の最小値
Ｃ X ：静電容量の平均値Variation in capacitance (%) = (C A -C
B ) / C X × 100 However, C A : Maximum capacitance C B : Minimum capacitance C X : Average capacitance value
【表１】 [Table 1]
【００２５】 表１の結果から、中間焼鈍の直前に表面
層除去を行うことにより、静電容量の増大を図りうると
ともに、位置による静電容量のばらつきも抑制できるこ
とを確認できた。[0025] From the results shown in Table 1, by performing the surface layer removed before the intermediate annealing straight, with can work to increase the capacitance, it was confirmed that can suppress variation in capacitance due to location.
【００２６】 以上説明したように、この発明の電解コ
ンデンサ電極用アルミニウム箔の製造方法は、面削した
アルミニウムスラブを均熱処理して熱間圧延した後、冷
間圧延するとともに、冷間圧延の途中で中間焼鈍を行
い、さらに最終焼鈍するアルミニウム箔の製造方法にお
いて、前記中間焼鈍の直前に表面層を除去するものであ
るから、圧延油とそれまでに形成された酸化膜とを除去
した状態で中間焼鈍がなされ、最終焼鈍後に得られる箔
は均一な表面状態となる。このような均一表面を有する
アルミニウム箔はエッチング溶解性も均一となり、静電
容量の増大を図りうるとともに、静電容量のばらつきを
低減することができる。As described above, according to the method for producing an aluminum foil for electrolytic capacitor electrodes of the present invention, the aluminum slab that has been chamfered is subjected to soaking and hot rolling, then cold rolling, and during the cold rolling. state in performed intermediate annealing, further in the manufacturing method of an aluminum foil final annealing, the because intermediate annealing is to remove the surface layer immediately before, removal of the oxide film formed on the far rolling oil The intermediate annealing is carried out, and the foil obtained after the final annealing has a uniform surface state. The aluminum foil having such a uniform surface also has uniform etching solubility, so that the capacitance can be increased and the variation in the capacitance can be reduced.
【００２７】また、前記表面層除去を冷間圧下率が９６
％以上の時に行うことにより、あるいはさらに前記表面
層の除去量を厚さ方向で０．５μｍ以下とすることによ
り、特に顕著に上述の効果を奏することができる。Further, the surface layer is removed by a cold reduction of 96.
% Or more, or by setting the removal amount of the surface layer to 0.5 μm or less in the thickness direction, the above effect can be particularly remarkably achieved.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ２２Ｆ 1/00 ６８５ Ｃ２２Ｆ 1/00 ６８６Ｚ ６８６ ６９４Ａ ６９４ Ｈ０１Ｇ 9/04 ３４６ (56)参考文献 特開 平５−200407（ＪＰ，Ａ) 特開 平８−260118（ＪＰ，Ａ) 特開 平５−279815（ＪＰ，Ａ) 特開 平５−255821（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C22F 1/04 - 1/057 B21B 1/00 - 3/02 H01G 9/04 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI C22F 1/00 685 C22F 1/00 686Z 686 694A 694 H01G 9/04 346 (56) References JP-A-5-200407 (JP, JP, A) JP 8-260118 (JP, A) JP 5-279815 (JP, A) JP 5-255821 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) ) C22F 1/04-1/057 B21B 1/00-3/02 H01G 9/04
Claims (3)
して熱間圧延した後、冷間圧延するとともに、冷間圧延
の途中で中間焼鈍を行い、さらに最終焼鈍するアルミニ
ウム箔の製造方法において、 前記中間焼鈍の直前に表面層を除去することを特徴とす
る電解コンデンサ電極用アルミニウム箔の製造方法。1. A method for producing an aluminum foil, which comprises subjecting a chamfered aluminum slab to a uniform heat treatment, hot rolling, cold rolling, intermediate annealing in the middle of cold rolling, and final annealing. method of manufacturing an aluminum foil for electrolytic capacitor electrodes, and removing a surface layer before the intermediate annealing straight.
以上である請求項１に記載の電解コンデンサ電極用アル
ミニウム箔の製造方法。2. The cold reduction rate when removing the surface layer is 96%.
The method for producing an aluminum foil for an electrolytic capacitor electrode according to claim 1, which is as described above.
５μｍ以下である請求項１または２に記載の電解コンデ
ンサ電極用アルミニウム箔の製造方法。3. The removal amount of the surface layer is 0.
It is 5 micrometers or less, The manufacturing method of the aluminum foil for electrolytic capacitor electrodes of Claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32182698A JP3495265B2 (en) | 1998-11-12 | 1998-11-12 | Method for producing aluminum foil for electrolytic capacitor electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32182698A JP3495265B2 (en) | 1998-11-12 | 1998-11-12 | Method for producing aluminum foil for electrolytic capacitor electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000144352A JP2000144352A (en) | 2000-05-26 |
| JP3495265B2 true JP3495265B2 (en) | 2004-02-09 |
Family
ID=18136860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32182698A Expired - Lifetime JP3495265B2 (en) | 1998-11-12 | 1998-11-12 | Method for producing aluminum foil for electrolytic capacitor electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3495265B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4938226B2 (en) * | 2003-06-03 | 2012-05-23 | 昭和電工株式会社 | Method for manufacturing aluminum material for electrolytic capacitor electrode, aluminum material for electrolytic capacitor electrode, method for manufacturing electrode material for electrolytic capacitor, and aluminum electrolytic capacitor |
| CN101477897B (en) * | 2009-01-20 | 2012-05-23 | 宁夏东方钽业股份有限公司 | Tantalum wire for tantalum capacitor anode lead wire and manufacturing process thereof |
| JP4493721B2 (en) * | 2009-02-03 | 2010-06-30 | 昭和電工株式会社 | Aluminum material for electrolytic capacitor electrode and electrolytic capacitor |
| CN105569499B (en) * | 2016-03-03 | 2017-04-19 | 福建省闽发铝业股份有限公司 | Production process of aluminum profile with compound layer |
| CN110923593B (en) * | 2019-11-27 | 2021-03-30 | 新疆众和股份有限公司 | Intermediate annealing process of high-voltage anode aluminum foil for electrolytic capacitor |
-
1998
- 1998-11-12 JP JP32182698A patent/JP3495265B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JP2000144352A (en) | 2000-05-26 |
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