JPH0524377A - Method for anodic oxidation of substrate for lithographic printing form - Google Patents
Method for anodic oxidation of substrate for lithographic printing formInfo
- Publication number
- JPH0524377A JPH0524377A JP18737791A JP18737791A JPH0524377A JP H0524377 A JPH0524377 A JP H0524377A JP 18737791 A JP18737791 A JP 18737791A JP 18737791 A JP18737791 A JP 18737791A JP H0524377 A JPH0524377 A JP H0524377A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- electrode
- anodizing
- aluminum
- anodic oxidation
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、平版印刷版用支持体の
製造方法に関するものであり、特にアルミニウムまたは
その合金製の機械的、化学的又は電気化学的方法で粗面
化処理された平版印刷版用支持体を陽極酸化処理する方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a support for a lithographic printing plate, and particularly to a lithographic plate made of aluminum or an alloy thereof which has been roughened by a mechanical, chemical or electrochemical method. The present invention relates to a method of anodizing a printing plate support.
【０００２】[0002]
【従来の技術】一般に、平版印刷版に使用されるアルミ
ニウム支持体は、親水性及び保水性に優れていることが
要求され、そのために機械的、化学的又は電気化学的な
方法で表面に微細な凹凸を形成して粗面化処理されてい
る。さらに、この粗面化処理された表面の機械的強度及
び保水性を向上させるために、表面を陽極酸化処理する
ことも一般に行われている。2. Description of the Related Art Generally, an aluminum support used for a lithographic printing plate is required to have excellent hydrophilicity and water retention property, and therefore, the surface thereof is finely divided by a mechanical, chemical or electrochemical method. Rough surface is formed by forming irregularities. Further, in order to improve the mechanical strength and the water retention of the roughened surface, the surface is generally anodized.
【０００３】従来、平版印刷版用支持体の陽極酸化処理
は、特開昭48−26638号、特公昭58−24517号、特開昭47
−18739号各公報等で開示されている陽極酸化処理方法
で行われており、この方法は、いわゆる液中給電方式と
呼ばれている。この液中給電方式による陽極酸化処理装
置としては、例えば、図２に示す装置があった。図２に
示す陽極酸化処理装置は、アルミニウム製品１を負に帯
電するための給電部２、その負に帯電したアルミニウム
製品１を陽極酸化処理するための陽極酸化処理部３およ
び給電部２と陽極酸化処理部３との液中間での電流の短
絡を防止するための中間部４の三つの部分によって構成
されている。そして、給電部２と陽極酸化処理部３に
は、給電電極５と電解電極６がそれぞれ電解液中に配設
され、これらの給電電極５と電解電極６は直流電源７を
介して接続されている。Conventionally, the anodizing treatment of the support for a lithographic printing plate has been carried out by JP-A-48-26638, JP-B-58-24517 and JP-A-47.
The method is carried out by the anodizing method disclosed in each of Japanese Patent Publication No. 18739, etc., and this method is called a so-called submerged power supply method. As an anodizing apparatus using the submersible power supply method, for example, there is an apparatus shown in FIG. The anodizing apparatus shown in FIG. 2 includes a power feeding unit 2 for negatively charging an aluminum product 1, an anodizing unit 3 for anodizing the negatively charged aluminum product 1, a power feeding unit 2 and an anode. It is composed of three parts of an intermediate part 4 for preventing a short circuit of a current in the liquid intermediate with the oxidation treatment part 3. The power feeding part 2 and the anodizing part 3 are respectively provided with a power feeding electrode 5 and an electrolytic electrode 6 in an electrolytic solution, and these power feeding electrode 5 and electrolytic electrode 6 are connected via a DC power source 7. There is.
【０００４】このような陽極酸化処理装置においては、
直流電源７からの電流は、給電部２で給電電極５から電
解液を介してアルミニウム製品１に流れ、その電流がア
ルミニウム製品１内を陽極酸化処理部３へ流れる。これ
により、陽極酸化処理部においてアルミニウム製品１の
表面に陽極酸化皮膜が生成される。In such an anodizing apparatus,
A current from the DC power supply 7 flows from the power supply electrode 5 from the power supply electrode 5 to the aluminum product 1 through the electrolytic solution, and the current flows through the aluminum product 1 to the anodizing unit 3. As a result, an anodized film is formed on the surface of the aluminum product 1 in the anodized portion.
【０００５】[0005]
【発明が解決しようとする課題】ところで、平版印刷版
用支持体の製造ラインにおいては、平版印刷版製品のサ
イズが非常に多様であるので、通常、被処理物であるア
ルミニウム製品も多様な巾のものが用いられている。On the other hand, in the production line of the lithographic printing plate support, the size of the lithographic printing plate product is very diverse, so that the aluminum product, which is the object to be processed, usually has various widths. Is used.
【０００６】そこで、従来、電解電極の巾をアルミニウ
ム製品の最大巾よりも広くして、多様な全てのアルミニ
ウム製品に対応できるようにしていた。Therefore, conventionally, the width of the electrolytic electrode has been made wider than the maximum width of the aluminum product so that it can be used for all kinds of various aluminum products.
【０００７】したがって、陽極酸化処理部においてはア
ルミニウム製品の側端部に電流が集中し、両側端部にお
ける酸化皮膜量が中央部に比べて増大するものであっ
た。このような現象は、供給電流量が小さい場合は余り
問題にならないが、生産性向上のために処理ラインを高
速化させたり、品質性能を向上させるために陽極酸化皮
膜量を増加させる場合には、アルミニウム製品の側端部
における酸化皮膜量の増大が著しくなり、品質上の許容
限界を越えたり、局所的な反応の集中により所謂焼け故
障が発生するものであった。したがって、処理ラインの
高速化、陽極酸化皮膜量の増加等を行うことができなか
った。Therefore, in the anodizing portion, the current concentrates on the side edge portions of the aluminum product, and the amount of oxide film on both side edge portions is increased as compared with the central portion. Such a phenomenon does not become a problem when the amount of supplied current is small, but when increasing the processing line speed to improve productivity or increasing the anodized film amount to improve quality performance, The increase in the amount of oxide film on the side edges of aluminum products is remarkable, and the so-called burn failure occurs due to exceeding the allowable limit in terms of quality or local concentration of reaction. Therefore, it was not possible to speed up the processing line and increase the amount of anodized film.
【０００８】本発明は、以上の問題点を解決し、帯状物
の側端部に悪影響を与えることなく、処理ラインの高速
化、陽極酸化皮膜量の増加等を行うことができる平版印
刷版用支持体の陽極酸化方法を提供することを目的とす
る。The present invention is for a lithographic printing plate which solves the above problems and can speed up the processing line and increase the amount of anodized film without adversely affecting the side edges of the strip. It is an object to provide a method for anodizing a support.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、帯状物の
側端部の焼け故障について鋭意研究した結果、側端部の
ように電流が集中する個所では、他の個所に比べて酸化
皮膜生成反応速度が早く、さらに、反応熱の発生によっ
て温度上昇が著しく、この温度上昇により反応が一層加
速されていることを見出した。そこで、本発明者らは、
さらに鋭意研究し、電解液を所定の流速以上で流すと、
側端部における熱を有効に除去し酸化皮膜生成反応を抑
制することを見出し、本発明を完成させた。DISCLOSURE OF THE INVENTION As a result of earnest studies on the burn-out failure of the side end portion of the band-shaped material, the present inventors have found that the portion where the current is concentrated, such as the side end portion, is oxidized more than other portions. It has been found that the reaction rate of film formation is fast, and that the temperature rise is remarkable due to the generation of reaction heat, and the reaction is further accelerated by this temperature rise. Therefore, the present inventors
Further diligent research, if the electrolyte is flowed at a predetermined flow rate or higher,
The present invention has been completed by finding that the heat at the side edges is effectively removed to suppress the oxide film formation reaction.
【００１０】すなわち、本発明の平版印刷版用支持体の
陽極酸化方法は、電解液中で長尺のアルミニウム又はそ
の合金製の帯状物を走行させるとともに、電解液中に設
けた電極で帯状物に通電させて陽極酸化する方法におい
て、電解液を少なくとも流速200mm/秒で流すことを特徴
として構成されている。That is, the method for anodizing a support for a lithographic printing plate according to the present invention is such that a long strip of aluminum or its alloy is run in an electrolytic solution and the strip is formed by an electrode provided in the electrolytic solution. The method is characterized in that the electrolytic solution is caused to flow at a flow rate of at least 200 mm / sec in the method of conducting anodization by energizing the battery.
【００１１】電解液の流速は、例えば、支持ローラーを
用いた陽極酸化装置の場合、電解液流入口からの流入量
を、支持ローラーと電極との間隙の面積で除した値であ
る。この流速は、少なくとも200mm/秒であるが、好まし
くは300mm/秒以上、特に好ましくは400mm/秒以上であ
る。流速が200mm/秒未満であると、側端に発生する熱を
効率よく除去できず焼け故障が発生するおそれがある。The flow rate of the electrolytic solution is, for example, in the case of an anodizing device using a supporting roller, a value obtained by dividing the amount of inflow from the electrolytic solution inlet by the area of the gap between the supporting roller and the electrode. This flow rate is at least 200 mm / sec, preferably 300 mm / sec or more, particularly preferably 400 mm / sec or more. If the flow velocity is less than 200 mm / sec, the heat generated at the side edge cannot be efficiently removed, and there is a risk of burning failure.
【００１２】また、電解液の流量は、帯状物の巾方向に
おいて、側端部の流速を中央部の流速より早くすること
が好ましい。これにより、中央部の反応を抑制すること
なく側端部のに発生した熱を効率よく除去することがで
きる。The flow rate of the electrolytic solution is preferably such that the flow velocity at the side end portion is faster than the flow velocity at the central portion in the width direction of the strip. Thereby, the heat generated at the side end portions can be efficiently removed without suppressing the reaction at the central portion.
【００１３】本発明の陽極酸化方法は、従来用いられて
いる公知の陽極酸化装置に適用することができるが、帯
状物を支持する支持ローラーと、該支持ローラーの上流
または下流の少なくとも一方に設けられた帯状物と接触
する給電ローラーと、前記支持ローラーの外周面に沿っ
て設置された略同心円状の電極とを有する装置に適用す
ることが以下の点で好ましい。The anodic oxidation method of the present invention can be applied to a conventionally used known anodic oxidation apparatus. It is provided on a supporting roller for supporting a belt-like material and at least one of the upstream and the downstream of the supporting roller. It is preferable to apply the present invention to an apparatus having a power feeding roller that comes into contact with the belt-shaped material and an electrode that has a substantially concentric shape and that is installed along the outer peripheral surface of the supporting roller in the following points.
【００１４】すなわち、支持ローラーを用いない装置
は、電解液中で生ずる電圧ロスが無視できないほど大き
なものであった。つまり、給電部及び陽極酸化処理部に
おいて、アルミニウム製品と電極の距離が短いと、アル
ミニウム製品のばたつきや不安定な搬送によるアルミニ
ウム製品の電極への接触により、傷つきやスパーク等の
品質故障が発生する場合がある。したがって、これらの
品質故障を防止するためには、アルミニウム製品と電極
の距離を大きくしなければならず、通常、50mm以上の距
離を取る必要があった。その結果、電解液中で生ずる電
圧ロスが大きいものとなっていた。That is, in the apparatus which does not use the supporting roller, the voltage loss generated in the electrolytic solution is so large that it cannot be ignored. That is, if the distance between the aluminum product and the electrode is short in the power feeding part and the anodizing part, the aluminum product may flutter or the aluminum product may come into contact with the electrode due to unstable transport, resulting in quality defects such as scratches and sparks. There are cases. Therefore, in order to prevent these quality failures, it is necessary to increase the distance between the aluminum product and the electrode, and it is usually necessary to maintain a distance of 50 mm or more. As a result, a large voltage loss occurs in the electrolytic solution.
【００１５】また、従来の装置は、アルミニウム製品の
両面が電解液に漬かっているので、陽極酸化処理を施さ
ない反対側の面にも電流が回り込んで酸化皮膜を生成さ
せる。したがって、片面処理製品を製造する場合には、
アルミニウム製品の反対側の面への電流の回り込みを防
止するための手段、例えば特開昭57−47894号公報に開
示されているような特別な手段を設ける必要があった。Further, in the conventional apparatus, since both surfaces of the aluminum product are immersed in the electrolytic solution, the current also flows into the surface on the opposite side not subjected to the anodic oxidation treatment to form an oxide film. Therefore, when manufacturing single-sided products,
It was necessary to provide a means for preventing the electric current from flowing into the opposite surface of the aluminum product, for example, a special means as disclosed in JP-A-57-47894.
【００１６】以上のような問題点を支持ローラーを用い
た装置は解決できるので好ましいものである。An apparatus using a supporting roller can solve the above problems and is preferable.
【００１７】また、上述した支持ローラーを用いた装置
において、給電ローラーは、以下に示す点で、支持ロー
ラーの両側にそれぞれ設けることが好ましい。Further, in the above-mentioned apparatus using the support roller, it is preferable that the power feeding roller is provided on each side of the support roller in the following points.
【００１８】すなわち、従来の陽極酸化処理では以下に
示す問題点があった。That is, the conventional anodic oxidation treatment has the following problems.
【００１９】第１に、陽極酸化処理ラインの高速化、陽
極酸化皮膜量の増加等を安価に行えなかった。すなわ
ち、生産性を向上させるために陽極酸化処理ラインを高
速化する際や、品質性能を向上させるために陽極酸化皮
膜量を増加させる際には、供給電流量を上げなければな
らず、供給電流量を上げるとアルミニウム製品内でのオ
ーム損による電圧降下が増加する。したがって、電源の
電解電圧を増大させることが必要となってくる。First, it was not possible to inexpensively increase the speed of the anodizing treatment line and increase the amount of anodized film. That is, the supply current amount must be increased when increasing the speed of the anodizing treatment line to improve productivity and when increasing the anodized film amount to improve quality performance. Increasing the amount increases the voltage drop due to ohmic loss in aluminum products. Therefore, it becomes necessary to increase the electrolytic voltage of the power supply.
【００２０】このように電解電圧を増加させると供給電
力量が増大するので、ランニングコストが増加し、か
つ、電源能力を大きくする必要があるので設備コストも
増加することになった。また、電解電圧が大きくなるこ
とから、給電電極と電解電極の間におけるアルミニウム
製品内のジュール熱の発生量が大きくなるので、アルミ
ニウム製品および電解液を定常の規定温度にまで冷却す
るための冷却費も増加することになる。以上のように、
従来の装置で電解処理ラインの高速化等を図ろうとする
と、極めて高価になるものであった。When the electrolysis voltage is increased in this manner, the amount of electric power supplied increases, so the running cost also increases, and the power supply capacity needs to be increased, resulting in an increase in equipment cost. Also, since the electrolysis voltage increases, the amount of Joule heat generated in the aluminum product between the power supply electrode and the electrolysis electrode also increases, so the cooling cost for cooling the aluminum product and the electrolytic solution to a steady specified temperature. Will also increase. As mentioned above,
If an attempt is made to increase the speed of the electrolytic treatment line using the conventional apparatus, it will be extremely expensive.
【００２１】第２に、薄いアルミニウム製品では、陽極
酸化処理ラインの高速化等が困難であった。すなわち、
給電部と陽極酸化処理部の間の中間部では、供給される
全電流がアルミニウム製品に流れるため、供給電流量が
大きい場合、厚さの薄いアルミニウム製品は必要以上に
発熱し、溶断した。したがって、薄いアルミニウム製品
の場合は、供給電流量に限界があり、陽極酸化処理ライ
ンの高速化、陽極酸化皮膜量の増加等を行うことは困難
であった。Secondly, for thin aluminum products, it was difficult to increase the speed of the anodizing treatment line. That is,
In the intermediate part between the power feeding part and the anodizing part, the total current supplied flows to the aluminum product. Therefore, when the supplied current amount was large, the thin aluminum product generated heat more than necessary and melted down. Therefore, in the case of a thin aluminum product, the amount of supply current is limited, and it has been difficult to increase the speed of the anodizing treatment line and increase the amount of anodized film.
【００２２】そこで、支持ローラーの両側に給電ローラ
ーを設けると、帯状物への電流の供給が上流側給電ロー
ラーを介す部分と下流側給電ローラーを介す部分との２
つのルートで行われるので、従来に比べて1/2の電流量
でよくなる。Therefore, if power feeding rollers are provided on both sides of the support roller, the current is supplied to the belt-like material through the upstream power feeding roller and the downstream power feeding roller.
Since it is done by one route, the current amount is half that of the conventional method.
【００２３】したがって、ラインの高速化等に際し、従
来に比して供給電力が少なくてすみ、工程中の発熱量も
低減するので冷却負荷が小さくなり、工程に要するコス
トが激減する。また、電源電圧の昇圧能力の大きなもの
を使用する必要がないので、コンパクトで設備費の少な
くてすむ電源設備とすることができる。さらに、薄物の
アルミニウム製品の場合でも、アルミニウム製品が溶断
することが無く、安定した陽極酸化処理を行うことがで
きる。Therefore, when the speed of the line is increased, the power supply is smaller than in the conventional case, and the amount of heat generated during the process is also reduced, so that the cooling load is reduced and the cost required for the process is drastically reduced. Further, since it is not necessary to use a power supply having a large boosting capability of the power supply voltage, it is possible to provide a power supply equipment which is compact and requires less equipment cost. Further, even in the case of a thin aluminum product, the aluminum product does not melt and stable anodic oxidation treatment can be performed.
【００２４】また、給電ローラーが接触するのは、帯状
物の被処理面（陽極酸化皮膜の生成面）であっても反対
面（陽極酸化皮膜の生成されない面）であってもよい
が、反対面であることが好ましい。何故なら、帯状物の
被処理面は、陽極酸化処理以前の工程で粗面化処理され
ているため表面に微小な凹凸が存在する。したがって、
被処理面に給電ローラーを接触させて給電した場合、帯
状物と給電ローラーの接触が不均一になって接触部に電
流が集中し、帯状物の表面にスパーク故障などの品質故
障が発生する場合があり、この品質故障は、高速、高効
率処理のために電流値を増大させた場合に特に発生し易
くなる。また、給電ローラーを帯状物の被処理面に接触
させると、給電ローラーを支持ローラーの下流側に配置
した場合、支持ローラーの下流側では酸化皮膜を通して
給電が行なわれることになり、傷つき故障発生の原因と
なるばかりでなく、電圧ロスにもつながる。以上のよう
に、給電ローラーを帯状物の被処理面の反対側の面に接
触させることにより、上述した欠点を防止でき、高速、
高皮膜量処理においても品質の優れた安定した処理が可
能になる。The power supply roller may come into contact with the surface to be treated of the strip (the surface on which the anodized film is formed) or the opposite surface (the surface on which the anodized film is not formed), but the opposite. It is preferably a surface. The reason is that the surface to be processed of the band-shaped material is roughened in the process before the anodic oxidation treatment, so that the surface has minute irregularities. Therefore,
When power is supplied by contacting the power supply roller with the surface to be processed, the contact between the strip and the power supply roller becomes uneven and current concentrates on the contact area, causing a quality failure such as a spark failure on the surface of the strip. However, this quality failure is particularly likely to occur when the current value is increased for high-speed and high-efficiency processing. Further, when the power feeding roller is brought into contact with the surface to be processed of the band-shaped material, when the power feeding roller is arranged on the downstream side of the support roller, power is fed through the oxide film on the downstream side of the support roller, which may cause a scratch failure. Not only the cause but also the voltage loss. As described above, by bringing the power feeding roller into contact with the surface of the strip opposite to the surface to be processed, the above-mentioned drawbacks can be prevented, and high speed,
Stable treatment with excellent quality is possible even in high coating amount treatment.
【００２５】支持ローラーは、帯状物を一方の面のみ電
解液に浸漬した状態で搬送させるもので、駆動源が設け
られてそれ自身が回転するものであっても、フリーに設
けられ単に回転自在なだけであってもよい。The support roller conveys the belt-like material in a state where only one surface is immersed in the electrolytic solution. Even if the belt is provided with a drive source and rotates itself, it is provided freely and is simply rotatable. It can be anything.
【００２６】電極は、支持ローラーと同心円状に設けら
れるのが好ましく、支持ローラーと電極の間隙は１〜40
mmの範囲にあることが好ましい。The electrode is preferably provided concentrically with the supporting roller, and the gap between the supporting roller and the electrode is 1 to 40.
It is preferably in the range of mm.
【００２７】帯状物は、純アルミニウム又はアルミニウ
ム合金で形成されており、このアルミニウム合金として
は、例えば、珪素、鉄、銅、マンガン、マグネシウム、
クロム、亜鉛、ビスマス、ニッケルなどの金属とのアル
ミニウム合金がある。帯状物の厚みは、一般に、0.1〜
0.5mmの範囲である。The belt-like material is made of pure aluminum or an aluminum alloy, and examples of the aluminum alloy include silicon, iron, copper, manganese, magnesium,
There are aluminum alloys with metals such as chromium, zinc, bismuth and nickel. The thickness of the strip is generally 0.1-
It is in the range of 0.5 mm.
【００２８】電解液としては、例えば、硫酸、燐酸、シ
ュウ酸又はそれらの塩の水溶液、あるいはそれらの混合
液があるが、所望の品質を得るために最適なものを選べ
ばよい。電解液の濃度、温度も自由に選択できる。The electrolytic solution may be, for example, an aqueous solution of sulfuric acid, phosphoric acid, oxalic acid or a salt thereof, or a mixed solution thereof, and an optimum one may be selected to obtain a desired quality. The concentration and temperature of the electrolytic solution can be freely selected.
【００２９】電源波形としては、直流の場合が一般的で
あるが、他にも交流波形や交直重畳波形など所望の品質
を得るために最適なものを選択できる。As the power source waveform, a direct current is generally used, but in addition to this, an AC waveform, an AC / DC superposed waveform, or the like that is optimum for obtaining a desired quality can be selected.
【００３０】陽極酸化時の電流密度は、自由に選択でき
る。例えば、処理時間中常に一定値としてもよいし、次
第に電流密度を上げていくようにしてもよい。The current density during anodic oxidation can be freely selected. For example, the value may be constant during the processing time, or the current density may be gradually increased.
【００３１】本発明の陽極酸化処理の前段階において、
通常、粗面化処理が施されている。この粗面化処理は、
アルミニウム支持体の保水性及びその上に塗設される感
光材料との密着性を向上させるためのもので、機械的粗
面化法、化学的粗面化法、電気化学的粗面化法又はそれ
らを組み合わせた方法により行われる。Before the anodizing treatment of the present invention,
Usually, a roughening treatment is applied. This roughening process
The purpose is to improve the water retention of the aluminum support and the adhesion to the photosensitive material coated on the aluminum support. A mechanical surface roughening method, a chemical surface roughening method, an electrochemical surface roughening method or The method is a combination of them.
【００３２】機械的粗面化法としては、例えば、ワイヤ
ーブラシングレイニング法、ブラシグレイニング法、サ
ンドブラスト法、ボールグレイニング法がある。化学的
粗面化法としては、例えば、選択的に表面を溶解させる
方法がある。電気化学的粗面化法としては、例えば、硝
酸、塩酸及びその混合液を電解液として用いる方法があ
る。さらに、これらに硝酸アルミニウム、塩化アルミニ
ウム、硝酸アンモニウム、塩化アンモニウム、硝酸マン
ガン、塩化マンガン、硝酸鉄、塩化鉄などの塩類を添加
してもよい。また、塩化ナトリウムや硝酸ナトリウムな
どの中性塩水溶液も用いられる。Examples of the mechanical surface roughening method include a wire brushing lining method, a brush graining method, a sand blast method, and a ball graining method. Examples of the chemical surface roughening method include a method of selectively dissolving the surface. Examples of the electrochemical graining method include a method using nitric acid, hydrochloric acid and a mixed solution thereof as an electrolytic solution. Furthermore, salts such as aluminum nitrate, aluminum chloride, ammonium nitrate, ammonium chloride, manganese nitrate, manganese chloride, iron nitrate and iron chloride may be added thereto. Further, a neutral salt aqueous solution such as sodium chloride or sodium nitrate is also used.
【００３３】また、粗面化処理した後陽極酸化処理前
に、必要に応じてアルカリエッチング処理、中和処理、
デスマット処理などが適宜選択、複合して実施すること
ができる。Further, after the surface roughening treatment and before the anodizing treatment, if necessary, an alkali etching treatment, a neutralization treatment,
Desmutting treatment or the like can be appropriately selected and combined.
【００３４】また、以上のような装置を１ユニットとし
て２つ以上の複数のユニットを長手方向に連結させ、複
数回上述した同様の陽極酸化処理を繰り返してもよい。It is also possible to connect two or more units in the longitudinal direction with the above apparatus as one unit and repeat the same anodizing treatment a plurality of times.
【００３５】帯状物を陽極酸化処理した後、必要により
特開平１−150583号公報記載の封孔処理、特開昭60−14
9491号公報記載の親水化処理、米国特許3181461号明細
書記載のアルカリ金属シリケート水溶液処理、米国特許
3860426号明細書記載の水溶性金属塩を含む親水性セル
ロースの下塗り層塗設などを適宜選択して実施できる。After subjecting the strip to anodizing treatment, if necessary, a sealing treatment described in JP-A-1-150583, JP-A-60-14
Hydrophilization treatment described in 9491, treatment with aqueous solution of alkali metal silicate described in U.S. Pat. No. 3,181,461, U.S. patent
The undercoat layer coating of hydrophilic cellulose containing a water-soluble metal salt described in Japanese Patent No. 3860426 can be appropriately selected and carried out.
【００３６】本発明による平版印刷版用支持体は、その
表面に感光層を設けて感光性平版印刷版とすることがで
きる。この感光層の組成物としては、ジアゾ樹脂からな
るもの、o-キノンジアジゾ化合物からなるもの、感光性
アジド化合物からなるもの、光重合性組成物、分子中に
不飽和二重結合を有する感光性樹脂からなる組成物等が
ある。The support for a lithographic printing plate according to the present invention can be made into a photosensitive lithographic printing plate by providing a photosensitive layer on the surface thereof. The composition of the photosensitive layer includes a diazo resin, an o-quinonediadizo compound, a photosensitive azide compound, a photopolymerizable composition, and a photosensitive resin having an unsaturated double bond in the molecule. And the like.
【００３７】[0037]
【作用】本発明では、電解液を少なくとも200mm/秒の流
速で流すことにより、側端に発しする熱を効率よく除去
し、酸化皮膜生成反応が過剰になるのを抑制する。In the present invention, the electrolytic solution is caused to flow at a flow rate of at least 200 mm / sec to efficiently remove the heat generated at the side edges and prevent the oxide film forming reaction from becoming excessive.
【００３８】[0038]
【実施例】本発明の平版印刷版用支持体の陽極酸化方法
の一実施例を図１に基づいて説明する。EXAMPLE An example of an anodizing method for a lithographic printing plate support of the present invention will be described with reference to FIG.
【００３９】図１は、平版印刷版用支持体の陽極酸化方
法を実施する装置の帯状物の搬送方向に接断した断面図
である。図１において、符号11は陽極酸化槽で、この陽
極酸化槽11内に、帯状物の搬送方向に切断した断面形状
が円弧状の電極12が設けられている。この電極12の一方
の端部上方には電解液流入口13が設けられ、この電解液
流入口13から電解液14が陽極酸化槽11内に充填されてい
る。また、電解液流入口13の近傍には流速調整手段( 図
示せず) が設けられ、陽極酸化槽11内を流れる電解液14
の流速を制御している。FIG. 1 is a cross-sectional view of the apparatus for carrying out the anodizing method for a lithographic printing plate support, taken along the transport direction of the belt-shaped material. In FIG. 1, reference numeral 11 is an anodizing tank, and an electrode 12 having an arc-shaped cross section cut in the carrying direction of the strip is provided in the anodizing tank 11. An electrolytic solution inlet 13 is provided above one end of the electrode 12, and the anodizing tank 11 is filled with the electrolytic solution 14 from the electrolytic solution inlet 13. Further, a flow rate adjusting means (not shown) is provided near the electrolyte inlet 13, and the electrolyte 14 flowing in the anodizing tank 11 is provided.
The flow velocity of is controlled.
【００４０】電極12の上方には、僅かな距離を隔てて同
心円状の周面を持つ支持ローラー15が電解液14に略下半
分が浸漬した状態で回転自在に配設されている。この支
持ローラー15の両側には、上流側給電ローラー16及び下
流側給電ローラー17が回転自在に設けられ、これら給電
ローラー16、17は電源（図示せず）を介して電極12に接
続されている。そして、帯状物としてのアルミニウム製
品18が、支持ローラー15に巻きつけられるとともに、給
電ローラー16、17に巻付けられている。Above the electrode 12, a support roller 15 having a concentric circular peripheral surface is rotatably disposed at a slight distance with the lower half of the support roller immersed in the electrolyte solution 14. An upstream power feeding roller 16 and a downstream power feeding roller 17 are rotatably provided on both sides of the support roller 15, and the power feeding rollers 16 and 17 are connected to the electrode 12 via a power source (not shown). . Then, the aluminum product 18 as a strip is wound around the support roller 15 and the power supply rollers 16 and 17.
【００４１】以上のような陽極酸化装置でアルミニウム
製品を陽極酸化する方法について説明する。A method of anodizing an aluminum product with the above anodizing apparatus will be described.
【００４２】まず、アルミニウム製品18の陽極酸化しよ
うとする面と反対の面を給電ローラー16、17に接触させ
た状態で支持ローラー15にも密着させ、支持ローラー15
を回転させてアルミニウム製品18を搬送させるととも
に、流速調整手段で電解液12の流速ｖが200mm/秒以上に
なるように調整して陽極酸化槽11に流し込み、そして、
電源をＯＮして電流を供給する。この給電された電流
は、給電ローラー16、17からアルミニウム製品18に流
れ、さらに、アルミニウム製品18内をそれぞれ図中最下
端部に流れ、そして、電解液14を介して電極12に流れ込
み、アルミニウム製品18の露出面に陽極酸化皮膜が形成
される。First, the surface of the aluminum product 18 opposite to the surface to be anodized is brought into contact with the feeding rollers 16 and 17, and is also brought into close contact with the supporting roller 15, so that the supporting roller 15
Is rotated to convey the aluminum product 18, the flow velocity adjusting means adjusts the flow velocity v of the electrolytic solution 12 to 200 mm / sec or more, and the flow is adjusted to flow into the anodizing tank 11, and
Turn on the power to supply current. The supplied current flows from the power supply rollers 16 and 17 to the aluminum product 18, and further flows inside the aluminum product 18 to the lowermost end in the figure, and then flows into the electrode 12 through the electrolytic solution 14 to form the aluminum product. An anodized film is formed on the exposed surface of 18.
【００４３】このとき、アルミニウム製品18の側端部に
おける過剰な反応熱が電解液で除去されるので、陽極酸
化皮膜量を適度な範囲内にすることができ、かつ焼け故
障が発生することも無い。また、アルミニウム製品18を
傷つけることなくアルミニウム製品18と電極12の距離を
短くでき、かつアルミニウム製品18を流れる電流が半減
するので、電解電圧を減少させることができる。さら
に、上述したようにアルミニウム製品18を流れる電流が
半減するので、薄いアルミニウム製品18を高速で処理し
ても溶断することがない。At this time, since the excessive heat of reaction at the side end portion of the aluminum product 18 is removed by the electrolytic solution, the amount of the anodic oxide film can be kept within an appropriate range, and burn failure may occur. There is no. Further, the distance between the aluminum product 18 and the electrode 12 can be shortened without damaging the aluminum product 18, and the current flowing through the aluminum product 18 is halved, so that the electrolytic voltage can be reduced. Furthermore, since the current flowing through the aluminum product 18 is halved as described above, even if the thin aluminum product 18 is processed at a high speed, it will not melt.
【００４４】次に、本発明の陽極酸化方法と従来の陽極
酸化方法とを比較した実験結果に付いて説明する。Next, the results of experiments comparing the anodizing method of the present invention with the conventional anodizing method will be described.
【００４５】陽極酸化処理する帯状物；長尺のJIS 1050
アルミニウムの帯板状製品（厚み0.15mm、幅1000mm）を
ライン搬送速度50m/分で以下の処理を行なった。まず、
パミスー水懸濁液を研磨剤として回転ナイロンブラシで
表面を砂目立てした。この時の表面粗さ（中心線平均粗
さ）は0.5μｍであった。水洗後、70℃の10％苛性ソー
ダ水溶液中でアルミニウムの溶解量が６g/m2になるよう
にエッチングした。水洗後、30％硝酸水溶液中で中和
し、再び水洗を行なった。その後、0.7％硝酸水溶液中
で陽極時電圧13ボルト、陰極時電圧６ボルトの矩形波交
番波形を用いて（特開昭52−77702号公報実施例に記載
の電源波形）20秒間電解粗面化を行ない、20％硫酸水溶
液中で表面を洗浄した後、水洗した。Strips to be anodized; long JIS 1050
An aluminum strip-shaped product (thickness 0.15 mm, width 1000 mm) was subjected to the following treatment at a line transfer speed of 50 m / min. First,
The surface was grained with a rotating nylon brush using the Pamisu water suspension as an abrasive. At this time, the surface roughness (center line average roughness) was 0.5 μm. After washing with water, etching was performed in a 10% caustic soda aqueous solution at 70 ° C. so that the amount of aluminum dissolved was 6 g / m 2 . After washing with water, the mixture was neutralized in a 30% aqueous solution of nitric acid and washed again with water. Thereafter, in a 0.7% nitric acid aqueous solution, a rectangular wave alternating waveform having a voltage of 13 V for the anode and a voltage of 6 V for the cathode was used (power supply waveform described in the example of JP-A-52-77702) for 20 seconds for electrolytic surface roughening. The surface was washed with a 20% aqueous solution of sulfuric acid, and then washed with water.
【００４６】実施例１
上記アルミニウム製品を、図１に示す陽極酸化処理装置
を用い、電解液として20％の硫酸水溶液、ライン搬送速
度50m/分、電解電圧27Ｖ、供給電力900kw、電流密度50A
/dm2で陽極酸化処理した。また、電解液の平均流速は50
0mm/秒とした。Example 1 Using the anodizing apparatus shown in FIG. 1, the above aluminum product was treated with a 20% sulfuric acid aqueous solution as an electrolytic solution, a line transfer speed of 50 m / min, an electrolytic voltage of 27 V, a supply power of 900 kw, and a current density of 50 A.
Anodized with / dm 2 . The average flow rate of the electrolyte is 50
It was set to 0 mm / sec.
【００４７】その結果、膜厚1.5μｍの酸化皮膜が良好
に形成され、焼け故障等も発生せず良好な品質であっ
た。また、支持ローラー出口でのアルミニウム製品の表
面温度は50℃であり、長時間経過しても安定的に陽極酸
化処理が行われた。As a result, an oxide film having a film thickness of 1.5 μm was satisfactorily formed, and there was no burning failure and the quality was good. The surface temperature of the aluminum product at the outlet of the supporting roller was 50 ° C, and the anodizing treatment was performed stably even after a long time.
【００４８】実施例２
ライン搬送速度を100m/分とした他は実施例１と同様の
条件で陽極酸化処理を行ったが、実施例１と同様な結果
を得た。Example 2 Anodizing treatment was performed under the same conditions as in Example 1 except that the line transport speed was 100 m / min, but the same results as in Example 1 were obtained.
【００４９】比較例１
上記アルミニウム製品を、図２に示す陽極酸化処理装置
を用い、電解液として20％の硫酸水溶液、ライン搬送速
度50m/分、電解電圧120Ｖ、供給電力5000kw、電流密度2
5A/dm2で陽極酸化処理した。なお、電解液の平均流速は
100m/秒とした。Comparative Example 1 Using the anodizing apparatus shown in FIG. 2, the above aluminum product was treated with a 20% sulfuric acid aqueous solution as an electrolytic solution, a line transfer speed of 50 m / min, an electrolytic voltage of 120 V, a supply power of 5000 kw, and a current density of 2.
It was anodized at 5 A / dm 2 . The average flow rate of the electrolyte is
It was 100 m / sec.
【００５０】その結果、アルミニウム製品の側端部に焼
け故障が発生し、中間部でのアルミニウム製品の表面温
度は120℃であり、処理開始後約１分間でアルミニウム
製品が溶断し、処理を継続することができなかった。As a result, a burn-out failure occurred at the side edge of the aluminum product, the surface temperature of the aluminum product at the middle portion was 120 ° C., and the aluminum product melted down in about 1 minute after the start of the treatment, and the treatment was continued. I couldn't.
【００５１】[0051]
【発明の効果】本発明は、電流密度を上げても帯状物の
側端部で酸化皮膜量が増加し過ぎたり焼け故障が発生す
ることがないので、処理ラインを高速化でき、また陽極
酸化皮膜量を増加させることができる。EFFECTS OF THE INVENTION According to the present invention, since the amount of oxide film does not increase excessively at the side end portions of the belt-like material and burn failure does not occur even if the current density is increased, the processing line can be sped up and anodization can be performed. The amount of coating can be increased.
【図１】本発明による平版印刷版用支持体の陽極酸化方
法を実施する陽極酸化装置の一実施例の帯状物の搬送方
向に切断した断面模式図。FIG. 1 is a schematic cross-sectional view of an embodiment of an anodizing apparatus for carrying out the anodizing method of a lithographic printing plate support according to the present invention, taken along the transport direction of a strip.
【図２】従来の平版印刷版用支持体の陽極酸化装置の断
面模式図。FIG. 2 is a schematic cross-sectional view of a conventional anodizing device for a lithographic printing plate support.
12…電極 14…電解液 15…支持ローラー 16…上流側給電ローラー 17…下流側給電ローラー 18…アルミニウム製品（帯状物） 12 ... Electrode 14 ... Electrolyte 15… Support roller 16… Upstream feed roller 17 ... Downstream feeding roller 18 ... Aluminum products (belts)
Claims (2)
合金製の帯状物を走行させるとともに、電解液中に設け
た電極で帯状物に通電させて陽極酸化する方法におい
て、電解液を少なくとも流速200mm/秒で流すことを特徴
とする平版印刷版用支持体の陽極酸化方法1. A method of running a long strip of aluminum or its alloy in an electrolytic solution and anodizing the strip by energizing the strip with an electrode provided in the electrolytic solution, at least the flow rate of the electrolytic solution. Anodizing method for lithographic printing plate support characterized by flowing at 200 mm / sec.
中央部の流速より早くした請求項１に記載の平版印刷版
用支持体の陽極酸化方法2. A method of anodizing a support for a lithographic printing plate according to claim 1, wherein the flow velocity at the side end portion in the width direction of the strip is higher than that at the central portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18737791A JPH0524377A (en) | 1991-07-26 | 1991-07-26 | Method for anodic oxidation of substrate for lithographic printing form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18737791A JPH0524377A (en) | 1991-07-26 | 1991-07-26 | Method for anodic oxidation of substrate for lithographic printing form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0524377A true JPH0524377A (en) | 1993-02-02 |
Family
ID=16204949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18737791A Pending JPH0524377A (en) | 1991-07-26 | 1991-07-26 | Method for anodic oxidation of substrate for lithographic printing form |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0524377A (en) |
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| EP1712368A1 (en) | 2005-04-13 | 2006-10-18 | Fuji Photo Film Co., Ltd. | Method of manufacturing a support for a lithographic printing plate |
| EP2100677A1 (en) | 2008-03-06 | 2009-09-16 | Fujifilm Corporation | Method of manufacturing aluminum alloy plate for lithographic printing plate, aluminum alloy plate for lithographic printing plate obtained thereby and lithographic printing plate support |
| WO2010150810A1 (en) | 2009-06-26 | 2010-12-29 | 富士フイルム株式会社 | Light reflecting substrate and process for manufacture thereof |
| WO2011037005A1 (en) | 2009-09-24 | 2011-03-31 | 富士フイルム株式会社 | Lithographic printing original plate |
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| EP2384100A2 (en) | 2010-04-28 | 2011-11-02 | Fujifilm Corporation | Insulated light-reflective substrate |
| EP2420869A2 (en) | 2010-08-16 | 2012-02-22 | Fujifilm Corporation | Radiation reflection plate for LED |
| WO2013005717A1 (en) | 2011-07-04 | 2013-01-10 | 富士フイルム株式会社 | Insulating reflective substrate and method for producing same |
| EP2586621A1 (en) | 2011-10-28 | 2013-05-01 | Fujifilm Corporation | Manufacturing method and manufacturing apparatus of support for planographic printing plate |
| US8691403B2 (en) | 2008-12-26 | 2014-04-08 | Denso Corporation | Method for anodizing aluminum and anodized aluminum |
-
1991
- 1991-07-26 JP JP18737791A patent/JPH0524377A/en active Pending
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| KR20010008257A (en) * | 2000-11-18 | 2001-02-05 | 유장근 | Automation surface treatment instrument of aluminium using off-set printing plate |
| EP1625944A1 (en) | 2004-08-13 | 2006-02-15 | Fuji Photo Film Co., Ltd. | Method of manufacturing lithographic printing plate support |
| EP1712368A1 (en) | 2005-04-13 | 2006-10-18 | Fuji Photo Film Co., Ltd. | Method of manufacturing a support for a lithographic printing plate |
| EP2100677A1 (en) | 2008-03-06 | 2009-09-16 | Fujifilm Corporation | Method of manufacturing aluminum alloy plate for lithographic printing plate, aluminum alloy plate for lithographic printing plate obtained thereby and lithographic printing plate support |
| US8691403B2 (en) | 2008-12-26 | 2014-04-08 | Denso Corporation | Method for anodizing aluminum and anodized aluminum |
| WO2010150810A1 (en) | 2009-06-26 | 2010-12-29 | 富士フイルム株式会社 | Light reflecting substrate and process for manufacture thereof |
| WO2011037005A1 (en) | 2009-09-24 | 2011-03-31 | 富士フイルム株式会社 | Lithographic printing original plate |
| WO2011078010A1 (en) | 2009-12-25 | 2011-06-30 | 富士フイルム株式会社 | Insulated substrate, process for production of insulated substrate, process for formation of wiring line, wiring substrate, and light-emitting element |
| EP2384100A2 (en) | 2010-04-28 | 2011-11-02 | Fujifilm Corporation | Insulated light-reflective substrate |
| EP2420869A2 (en) | 2010-08-16 | 2012-02-22 | Fujifilm Corporation | Radiation reflection plate for LED |
| WO2013005717A1 (en) | 2011-07-04 | 2013-01-10 | 富士フイルム株式会社 | Insulating reflective substrate and method for producing same |
| EP2586621A1 (en) | 2011-10-28 | 2013-05-01 | Fujifilm Corporation | Manufacturing method and manufacturing apparatus of support for planographic printing plate |
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