JP2004107731A - Surface treated doctor blade - Google Patents

Surface treated doctor blade Download PDF

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Publication number
JP2004107731A
JP2004107731A JP2002272525A JP2002272525A JP2004107731A JP 2004107731 A JP2004107731 A JP 2004107731A JP 2002272525 A JP2002272525 A JP 2002272525A JP 2002272525 A JP2002272525 A JP 2002272525A JP 2004107731 A JP2004107731 A JP 2004107731A
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JP
Japan
Prior art keywords
plating
blade
doctor blade
phosphorus
iron
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JP2002272525A
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Japanese (ja)
Inventor
Kazuya Urata
浦田 和也
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NIPPON NEW CHROME KK
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NIPPON NEW CHROME KK
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Priority to JP2002272525A priority Critical patent/JP2004107731A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an iron-phosphorus based metal plated surface treated doctor blade in place of chromium based plating and nickel based plating in the conventional technology, which has quality/performance equal to or above that of them, and is friendly for the environment and human body. <P>SOLUTION: In the surface treated doctor blade, at least the surface of the edge position consists of iron-phosphorus based metal plating, preferably, iron-phosphorus based composite plating in which ceramic fine particles and/or organic resin fine particles are dispersed. The content of phosphorus in the iron-phosphorus based metal plating is 0.5-20 mass%, and the thickness of the plating is 0.1-100 μm. As the ceramic fine particles, SiC is preferable, and, as the organic resin fine particles, a fluorine based resin is preferable. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、鉄−リン系金属めっきによる表面処理が施されたドクターブレードに関するものであり、さらに詳しく言えば、クロム系金属めっき被覆ドクターブレード、ニッケル系金属めっき被覆ドクターブレードと同等かそれ以上の品質性能を有し、しかも、環境と人にやさしい鉄−リン系金属めっき被覆表面処理ドクターブレードに関するものである。
【0002】
【従来技術及びその課題】
グラビア(凹版)印刷では、図1および図2(図1の部分拡大図。但し、図1、2共に理解を容易にするためにブレード部分をシリンダーに対して極端に拡大して描いている。)に示すように円筒表面に画像に対応するセルと呼ばれる微小な凹部(図示せず)を多数形成したシリンダー(1)を用い、このシリンダーの円周面にスチール製またはステンレス製のドクターブレード(2)を一定の圧力で押圧しておいて、版面の非画像部に付着しているインキ(3)を掻き落とし除去している。このドクターブレードは非画像部のインキを完全に除去すると共に、画像部に所定量のインキを残す機能を有するものであるから、シリンダーとドクターブレードとの接触圧は常に一定に維持されなければならず、その先端部(刃先)には耐磨耗性が要求され、一般的にはブレードに表面処理を施したドクターブレードが利用されている。
【0003】
例えば、クロムめっき系による表面処理ドクターブレードとしては、特許文献1には、可撓性の鋼に5μm以上であって、鋼材の厚みよりも薄くクロムを被覆し、被覆後110〜145℃でアニールすることを特徴とする塗工用ブレードが提案されている。
【特許文献1】
特許第2583611 号公報
【0004】
特許文献2には、第1層のニッケル系合金と、その上層のクロムめっきとよりなる発錆び性、耐磨耗性に優れた表面処理ドクターブレードが提案されている。
【特許文献2】
特開平3−64595 号公報
【0005】
ニッケル系めっきによる表面処理ドクターブレードとしては、ニッケル系金属(さらに具体的には、ニッケル−リン合金)マトリックス中にSiCの微粒子が分散した複合めっきが施されたドクターブレードが一般的に利用されているが、それ以外にも、特許文献3には、ドクターブレード本体の表面に、フッ素樹脂の粒子を分散させたニッケルめっきを施した凹版印刷用ドクターブレードが提案されており、特許文献4には、第1層にNiめっき、その上層にセラミック粉を含有させたNiめっきの2層めっきよりなるドクターブレードの製造方法が提案されている。
【特許文献3】
実開平01−101845 号公報
【特許文献4】
特許第2952333 号公報
【0006】
しかし、これら従来技術には以下の問題があった。
特許文献1、特許文献2に提案されているクロムめっき被覆ドクターブレードは、表面処理の際、クロムめっきが6価のクロムよりなる薬液を使用するため、その廃液処理に多大の費用と設備スペースを要すること、まためっき作業者の衛生管理の上でも十分な配慮を必要とすることなどの問題があった。
【0007】
また、SiCが分散したニッケル系金属めっき被覆ドクターブレード、および特許文献3、特許文献4に提案されているドクターブレードは、刃先の耐磨耗性が著しく改善するため、グラビア印刷用として広く利用されているが、いずれもブレードの最表層がニッケル系金属で形成されている。近年、このニッケル金属は、人体と接触した場合にアレルギーを引き起こすアレルゲンであることが明確となり、職場環境においてもニッケル金属との接触を極力避けたいという潜在的ニーズは非常に高く、少なくとも人体と接触する可能性のあるブレードの最表面には、ニッケル金属を主成分としない表面処理技術が求められつつあるが、いまだ、このニッケル系金属めっき処理に変わるだけの品質性能を有するドクターブレードの表面処理がえられていないのが現状であった。
【0008】
そこで、本発明の課題は、これら従来技術の問題を解決することをねらいとし、従来技術と同等かそれ以上の品質性能を有し、しかも、環境と人体にやさしいドクターブレード用の表面処理を提案することにある。
【0009】
【課題を解決するための手段】
本発明者らは、従来技術に変わり得るドクターブレード用の表面処理を鋭意検討した結果、クロム系めっき、ニッケル系めっきに変わる表面処理として新たに特定の鉄−リン系の金属めっきを適用することにより、従来技術と同等かそれ以上の品質性能を有し、しかも、環境と人にやさしい表面処理ドクターブレードが得られることを見出し本発明を完成するに至った。
【0010】
すなわち、本願発明のドクターブレードは、以下の構成よりなる。
1.少なくとも刃先部の表面が、鉄−リン系金属めっきよりなる表面処理ドクターブレード。
2.鉄−リン系金属めっきが、セラミック微粒子および/または有機樹脂微粒子が分散した鉄−リン系複合めっきである前記1に記載の表面処理ドクターブレード。
3.セラミックがSiCである前記2に記載の表面処理ドクターブレード。
4.有機樹脂がフッ素系樹脂である前記2に記載の表面処理ドクターブレード。
5.鉄−リン系金属めっき中のリン含有量が0.5〜20質量%である前記1乃至4のいずれか1項に記載の表面処理ドクターブレード。
6.鉄−リン系金属めっきのめっき厚が、0.1〜100μmである前記1乃至5のいずれか1項に記載の表面処理ドクターブレード。
7.セラミック微粒子の粒子径が、0.03〜6μmである前記2に記載の表面処理ドクターブレード。
8.有機樹脂微粒子の粒子径が、0.02〜10μmである前記2に記載の表面処理ドクターブレード。
9.セラミック微粒子および/または有機樹脂微粒子の粒子径が、めっき膜厚の0.5倍以下である前記7または8に記載の表面処理ドクターブレード。
【0011】
【発明の実施の形態】
以下、本発明を詳細に説明する。
本発明に使用されるドクターブレード基材は、印刷用、塗装用に使用されている公知のスチール製および/またはステンレス製基材であればいずれも使用可能である。
また、通常、ドクターブレード用基材は、刃先部となる側縁が薄刃状になるように段付け形成される等の加工が施されていて、その刃の形状の違いにより平行刃、傾斜刃、丸刃、角刃があり、いずれの形状のものも使用することが可能である。また、このような刃先加工を、ブレードの片側のみに行った片刃タイプのもの、両側に行った両刃タイプのものがあり、本発明では用途に応じていずれのものも使用することが可能である。
【0012】
本発明ではブレード基材寸法にも何ら制限は無く適宜選択して利用可能であるが、代表的なブレード基材は厚さが 0.15 mm〜0.6 mm、幅が40〜60mmの帯状鋼板よりなる。
【0013】
本発明による表面処理ドクターブレードは、上記ドクターブレード基材の少なくとも刃先部の表面に鉄−リン系金属めっきを施した表面処理ドクターブレードよりなる。リンを含まない鉄めっき、あるいは、鉄−リン系金属以外の金属による表面処理では、従来のニッケル系めっき、クロム系めっきに変わり得るだけの耐磨耗性が得られないか、あるいはコスト的にかなり割高となってしまい工業的利用には適さない。また、従来の鉄めっきでは、耐食性が劣ったものとなり、長期保管あるいは高温多湿の海外への輸出は困難であるが、リンを含有する鉄−リンめっきとすることにより、めっき皮膜中にアモルファスの領域が形成され、従来の鉄めっきよりも、耐食性が向上した結果、防錆油との併用によりこれらにも対応可能となる。
【0014】
また、鉄−リン系金属めっきのマトリックス中にセラミック微粒子および有機樹脂微粒子をそれぞれ単独で、または両者を混合して含有させることにより、ブレードの耐磨耗性はさらに向上する。これは、セラミック微粒子および/または有機樹脂微粒子が金属マトリックス中に分散することにより、めっきの内部応力が緩和され密着性が向上する効果に加え、セラミック微粒子の持つ優れた耐磨耗性の効果および/または有機樹脂微粒子のもつ優れた潤滑性の効果が金属マトリックスに付与されたことによる相乗効果によるものと考えられる。
【0015】
本発明でいうセラミック微粒子とは、例えば、Al、Fe O 、TiO 、ZrO 、SiO 、BeO 、MgO、ダイヤモンド、SiC、TiC、WC、VC、ZrC、TaC、BC、BN、ZrB 、TiN、Si、WSi 等の中から選ばれる少なくとも1種の粒子を言う。これらの中でもSiCが最も好ましい。
【0016】
また、本発明で使用するセラミック微粒子の粒子径は 0.03〜6μmが好ましい。粒子径が 0.03 μm未満では、基材との密着性が劣るので好ましくない。一方、6μmを超えると、セラミック微粒子がめっき中から欠落しやすくなり、欠落した皮膜欠陥部において、連続印刷時にスジ等の印刷不良が生じやすくなり、本発明の効果が得られず本発明には適さない。
さらに好ましいセラミック微粒子の粒子径は 0.1〜3μmであり、0.3〜1.5 μmの粒子径が最も好ましい。
【0017】
また、本発明で使用する有機樹脂微粒子としては、めっき液中での有機樹脂の安定性およびめっき皮膜としての潤滑性の付与効果の観点からフッ素系樹脂が好ましい。ここでいうフッ素系樹脂微粒子としては、例えば、4−フッ化エチレン樹脂、パーフロロアルコキシ樹脂、フッ化エチレンプロピレン樹脂、4−フッ化エチレン−パーフロロアルキルビニルエーテル共重合樹脂、4−フッ化エチレン−エチレン共重合樹脂、3−フッ化塩化エチレン樹脂、フッ化ビニリデン樹脂等の樹脂粒子であり、これらの中でも4−フッ化エチレン樹脂、パーフロロアルコキシ樹脂、フッ化エチレンプロピレン樹脂が好ましく、特に4−フッ化エチレン樹脂が最も好ましい。
【0018】
有機樹脂微粒子の粒子径は、0.02〜10μmが好ましい。粒子径が 0.02 μm未満では、基材との密着性が劣るので好ましくない。一方、10μmを超えると、樹脂粒子がめっき中から欠落しやすくなり、欠落した皮膜欠陥部において、連続印刷時にスジ等の印刷不良が生じやすくなり、本発明の効果が得られず本発明には適さない。中でも好ましい粒子径は 0.05〜5μmであり、さらに好ましくは 0.1〜1μmである。
【0019】
さらに、本発明では、セラミック微粒子または有機樹脂微粒子の粒子径の上限値とこれら微粒子が分散しているめっき層のめっき膜厚の関係において、分散粒子の粒子径の上限値が、めっき膜厚の 0.5 倍以下とすることが最も望ましい。0.5 倍を超えると、これら微粒子あるいは微粒子が凝集した凝集粒子がめっきから過度に突き出た状態として存在しやすくなるため、このめっき層より突き出た粒子により、連続印刷時に印刷物に印刷スジが発生しやすくなり本発明では好ましくない。特に好ましい粒子径の上限値は、めっき厚の 0.3 倍以下であり、最も望ましくは 0.1倍以下である。
めっき中のセラミック微粒子および/または有機樹脂微粒子の含有量は、特には規定しないが、好ましい含有量は、めっき中で1〜55容量%、さらに好ましくは5〜40容量%、最も好ましくは10〜30容量%である。
【0020】
1容量%未満では、添加による耐磨耗性向上効果が得られにくく、50容量%を超えると、めっきの密着性が劣るため好ましくない。
鉄−リン系金属めっき中でのリンの含有量は、0.5〜20質量%とすることが好ましい。リン含有量が 0.5 質量%未満では、耐磨耗性の向上効果が不十分であり、また、20質量%を超えると、めっきが脆くなり耐磨耗性、密着性が劣化するため好ましくない。さらに好ましいリン含有量は、1〜15質量%であり、さらに望ましくは、2〜8質量%である。
【0021】
本発明では、めっき後の少なくとも刃先部分の表面硬度をビッカース硬度(Hv)で400〜1500とする。硬度が400未満では、グラビア印刷において掻き取り不良が生じ易く連続印刷の初期段階で、画像の形状不良等の印刷不良が生じやすくなるだけでなく、耐磨耗性にも劣るため本発明には適さない。また、ビッカース硬度が1500を超えると、めっきが脆く剥離しやすくなるばかりか、シリンダーの版面を傷つけてしまい、印刷不良が生じやすくなるので本発明には適さない。特に好ましいビッカース硬度(Hv)は600〜1300であり、さらに好ましくは800〜1200である。
【0022】
なお、本発明におけるビッカース硬度(Hv)とは、JIS Z 2251の微小硬さ試験方法のビッカース硬さ試験に準拠しておこなうものである(試験荷重に関しては、めっき厚に応じて50gf未満の荷重を利用して測定することも可能である。)。
【0023】
本発明におけるめっきの膜厚は、0.1〜100μmとすることが好ましい。めっき厚が 0.1 μm未満では、耐磨耗性の効果が得られず本発明には適さない。また、100μmを超えると経済的に不利であるばかりか、めっきの密着性が劣ってくるので本発明には適さない。特に好ましい膜厚は、1〜50μm、さらに3〜30μmが望ましい。
【0024】
めっき厚の測定方法としては、公知の測定方法が利用できる。
例えば、(1) 蛍光X線測定装置を用いてめっきから放射される蛍光X線量を測定して、めっきの厚さを測定する方法、(2) めっきの垂直断面を光学顕微鏡、電子顕微鏡で観察しめっき厚を直接測定する方法等、JIS H 8501に示されているめっきの厚さ試験方法の中から適宜選択することにより測定可能である。
【0025】
以上のように本発明の表面処理ドクターブレードは、鉄−リンめっきまたは鉄−リンめっきに用途に応じてセラミック微粒子および/または有機樹脂微粒子を分散させたものであるが、これらのめっきの主な構成成分(鉄、リン、セラミック微粒子、有機樹脂微粒子)以外にも微量成分として、例えば、めっき浴に添加可能な、pH調整剤、応力緩和剤、表面張力調整剤、消泡剤、酸化防止剤、還元剤、光沢剤等の各種添加剤に起因した成分、めっき浴の溶媒である水にふくまれる微量元素に起因した成分、あるいは、その他、微量合金成分が含有しても、本発明の効果を損ねない範囲であれば何ら支障はない。
【0026】
本発明の表面処理ドクターブレードは、公知の製造技術を利用して製造することが可能である。
製造法としては、例えば、脱脂→水洗→活性化処理→水洗→めっき→水洗→乾燥→焼鈍→所定寸法への剪断等により製造可能であり、さらに、前記の工程の焼鈍前および/または焼鈍後に、刃先研磨による刃先調整、表面研磨による表面調整を行ってもよいし、焼鈍工程および/または活性化処理工程を省略してもよい。
めっき方法としては、電気めっき、無電解めっき等の湿式めっきあるいは溶射、蒸着等の乾式めっき等の公知のめっき技術を利用することができる。特にコスト的な観点から、湿式めっきによる方法が望ましい。
【0027】
湿式めっきにおけるめっき浴としては、本発明の鉄−リン系金属めっきを形成できるものであれば、特には限定しないが、例えば、硫酸第一鉄浴、塩化第一鉄浴、ほうフッ化第一鉄浴、スルファミン酸第一鉄浴、硫酸第一鉄/塩化第一鉄の混合浴等の従来の鉄めっき浴に次亜リン酸および/またはその塩を添加したものが利用でき、用途によっては、さらにセラミック微粒子、有機樹脂微粒子を分散させためっき浴を利用することが可能である。これらの中でも、浴安定性とめっき密着性の観点から硫酸第一鉄/塩化第一鉄の混合浴が最も好ましい。
また、これらめっき浴に適宜、pH調整剤、応力緩和剤、表面張力調整剤、消泡剤、酸化防止剤、還元剤、光沢剤等の各種添加剤を添加することも、もちろん可能である。
【0028】
さらに、本発明では、ブレード基材と鉄−リン系金属めっきとの密着性を上げたり、これらめっき皮膜の析出を促進させたりすることを狙いとして、予め鉄−リン系金属めっきの下地処理として、ニッケル系めっき、銅系めっき等による下地めっきを行うことも可能である。特に好ましい下地めっきとしてニッケル系ストライクめっきが有効である。ニッケル系めっきを下地めっきとして使用しても、その上層には、鉄−リン系金属めっきが施されるため、人に直接ニッケル金属が接触することは無いので、下地めっきとしてニッケルめっきを利用することに何ら支障はない。また、後述する刃先のなじみ性を向上させるため、刃先の最先端の研磨を実施する場合、刃先の最先端にほんのわずかではあるが、下地ニッケル層の断面部分が露出する場合があるが、通常、この刃先の最先端は人が素手で接触すると切傷を生じる恐れがあるため、研磨後は人が素手で接触することはなく、特に問題はない。
【0029】
また、本発明による表面処理ドクターブレードの一層の機能性向上のために、本発明に支障のない範囲内で、鉄−リン系金属めっきの上層に、さらに金属めっき、有機樹脂皮膜、無機皮膜、有機/無機複合皮膜等の表面処理を施してもよい。
【0030】
また、本発明による表面処理ドクターブレードを保管する場合は、表面に防錆油等を塗布処理して保管することが望ましい。
【0031】
本発明の表面処理ドクターブレード実施の態様としては以下のものが挙げられ、いずれの態様をとっても支障がない。
(1)ブレード両側(シリンダー回転方向表側(図2のS側)および裏側(図2のR側))全面に本発明による鉄−リン系金属めっきを施した態様、
(2)ブレード全面の片側に本発明による鉄−リン系金属めっきを施した態様、具体的には刃先の表側(図2のS側)あるいは、刃先の裏側(図2のR側)のみ全面に本発明による鉄−リン系金属めっきを施し、その反対側には、その他の表面処理被覆を施すか、表面処理なしスチールのままのもの、
(3)少なくとも刃先のみの両側(図2のS側およびR側)に本発明による鉄−リン系金属めっきを施したもの、
(4)少なくとも刃先のみの片側に本発明による鉄−リン系金属めっきを施した態様、具体的には、刃先の表側(図2のS側)、あるいは刃先の裏側(図2のR側)の刃先のみに本発明による鉄−リン系金属めっきを施し、その反対側には、その他の表面処理を施すか、またはめっき無しスチールのままのもの。
【0032】
印刷メーカーでは、連続印刷時、寿命のきたブレードを新しいブレードに交換する際、新しいブレードの刃先とシリンダーとの接触不良により生じるスジ等の印刷欠陥を防止するため、30分〜60分の空運転を行い、シリンダーとブレードとの接触(以下、なじみという。)をよくした後、印刷を行うのが通常であり、空運転時間分のロスが発生し、印刷効率を落としている。そこで、このなじみ性をよくするため、本発明による表面処理ブレードの刃先先端部分を予めバフ、サンドペーパー等により研磨して、刃先最先端のブレード基材を露出させておくことにより、刃先のなじみ性を向上(空運転時間の短縮)させることも可能である。
本発明で得られる鉄−リン系金属めっき表面処理ドクターブレードは、グラビア印刷等の印刷用の用途に好適に利用可能であるが、塗装用途、画像形成装置等に装備される残留トナー除去用途等のその他の用途で、現在ニッケル系めっき被覆ドクターブレード、クロムめっき被覆ドクターブレードが利用されている分野でも使用可能である。
【0033】
【実施例】
以下、実施例および比較例を挙げて本発明を説明するが、本発明は以下の記載により限定されるものではない。
なお、実施例および比較例による表面処理ドクターブレードのめっき厚および表面硬度は下記の方法により測定した。
【0034】
[ビッカース硬度]
下記条件で、5点測定し、その平均値をビッカース硬度(Hv)とした。
測定箇所:刃先表側(ロール回転方向表側(図2のS側)))の刃先部、
測定機:株式会社 島津製作所製 HMV−2000、
測定条件:試験荷重25gf、保持時間10秒。
[めっき厚]
刃先の断面を電子顕微鏡で観察し、めっき厚を測定した。
【0035】
実施例1:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、40A)し、水洗後、鉄−リンめっき(硫酸第一鉄(7水塩):400g/L、塩化第一鉄(4水塩):80g/L、次亜リン酸:2g/L、アトテックフェロプレート用添加剤A(アトテックジャパン(株)):30ml/L、アトテックフェロプレート用添加剤B(アトテックジャパン(株)):1ml/L、浴温50℃、pH 1.6 )でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整し、鉄−リンめっきを行い。水洗後、乾燥を行った。その後ブレードの表面にバフ研磨を行い表面のめっき残渣等を完全に除去し、めっきブレード1を得た。
後処理工程:上記ブレード1をさらに300℃×1時間の焼鈍処理を行った後、所定の寸法に剪断し、実施例1の表面処理ドクターブレードを作成した。
この実施例1の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、および以下の方法で測定評価した環境特性、耐磨耗性およびめっき密着性の評価結果を表2にまとめて示す。
【0036】
(1)環境特性
実施例1による表面処理ドクターブレードの環境特性を下記の観点から評価した。
◎:表面処理皮膜中にクロムおよびニッケル系金属を含有しない。
○:表面処理皮膜中にクロムを含有しない。あるいは表面処理に下地皮膜としてニッケル系金属を使用しているが、最表層にはニッケル系金属は露出しておらず、最表層皮膜はクロムおよびニッケル系金属を含有しない。
△:表面処理皮膜中にクロムを含有しない。あるいは刃先最先端のみに一部刃先研磨により、下地皮膜としてのニッケル系金属がわずかに露出するが、刃先最先端以外の部分の最表層皮膜は、クロムおよびニッケル系金属を含有しない。
×:表面処理皮膜中にクロムあるいはニッケル系金属のいずれかを含有する。
【0037】
(2)耐磨耗性
印刷機に実施例1による表面処理ドクターブレードを装着し、予め刃先のなじみ運転を適宜行った後、油性インキおよび水性インキを使用して連続印刷を行い、刃先が磨耗し、印刷物にスジ、カブリ、カスレ、ニジミ等の印刷欠陥が発生した時点をブレードの寿命とし、後述のSiC分散ニッケル−リン複合めっきブレード(比較例1)の寿命と比較して下記表1に示す基準により評価した。
【0038】
【表1】

Figure 2004107731
【0039】
[評価基準]
1:寿命がSiC分散ニッケル−リン複合めっきブレード(比較例1)と同等かそれより優れる。
2:寿命がSiC分散ニッケル−リン複合めっきブレード(比較例1)より若干劣る。
3:寿命がSiC分散ニッケル−リン複合めっきブレード(比較例1)より著しく劣る。
【0040】
(3)めっき密着性
実施例1による表面処理ドクターブレードを、JIS H 8504に準拠し、所定角度に曲げ、次いで曲げられた、曲げ部にテープ剥離試験を実施し、めっきの剥離の有無を目視で観察し、下記の基準により評価した。
○:良好(めっき剥離無し)、
△:やや不良(めっき剥離若干あり)、
×:不良(めっき剥離大)。
上記の結果をまとめて表2に示す。
【0041】
実施例2:
後処理工程である、焼鈍工程を行わない以外は、実施例1と同様の方法で表面処理ドクターブレードを製造し、所定寸法へ剪断後、実施例2の表面処理ドクターブレードを得た。
この実施例2の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0042】
実施例3:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、40A)し、水洗、塩酸活性処理、水洗後、鉄−リンめっき(硫酸第一鉄(7水塩):400g/L、塩化第一鉄(4水塩):80g/L、次亜リン酸:2g/L、アトテックフェロプレート用添加剤A(アトテックジャパン(株)):30ml/L、アトテックフェロプレート用添加剤B(アトテックジャパン(株)):1ml/L、SiC(平均粒子径 0.5 μm):10g/L、浴温50℃、pH 1.6 )でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整し鉄−リン−SiC複合めっきを行い、水洗後、乾燥を行った。その後、ブレードの表面にバフ研磨を行い表面のめっき残渣等を完全に除去し、めっきブレード3を得た。
後処理工程:上記ブレード3はさらに300℃×1時間の焼鈍処理を行った後、所定の寸法に剪断し、実施例3の表面処理ブレードを作成した。
この実施例3の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、および、環境特性、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0043】
実施例4:
後処理工程である、焼鈍工程を行わない以外は、実施例3と同様の方法で表面処理ドクターブレードを製造し、所定寸法へ剪断後、実施例4の表面処理ドクターブレードを得た。
この実施例4の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0044】
実施例5:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、40A)し、水洗後、鉄−リンめっき(硫酸第一鉄(7水塩):400g/L、塩化第一鉄(4水塩):80g/L、次亜リン酸:2g/L、アトテックフェロプレート用添加剤A(アトテックジャパン(株)):30ml/L、アトテックフェロプレート用添加剤B(アトテックジャパン(株)):1ml/L、SiC(平均粒子径 0.5 μm):10g/L、浴温50℃、pH 1.6 )でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整し鉄−リン−SiC複合めっきを行い。水洗後、乾燥を行った。その後、ブレードの表面にバフ研磨を行い表面のめっき残渣等を完全に除去し、めっきブレード5を得た。
後処理工程:上記ブレード5はさらに300℃×1時間の焼鈍処理を行った後、所定の寸法に剪断し、実施例5の表面処理ブレードを作成した。
この実施例5の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0045】
実施例6:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、40A)し、水洗後、鉄−リンめっき(硫酸第一鉄(7水塩):400g/L、塩化第一鉄(4水塩):80g/L、次亜リン酸:2g/L、アトテックフェロプレート用添加剤A(アトテックジャパン(株)):30ml/L、アトテックフェロプレート用添加剤B(アトテックジャパン(株)):1ml/L、SiC(平均粒子径 0.5 μm):10g/L、浴温50℃、pH 1.6 )でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整し鉄−リン−SiC複合めっきを行い。水洗後、乾燥を行った。その後、ブレードの表面にバフ研磨を行い表面のめっき残渣等を完全に除去し、めっきブレード6を得た。
後処理工程:上記ブレード6の刃先最先端のみを#2000のサンドペーパーで研磨し、刃先最先端のみ表面処理皮膜を除去し、刃先最先端のブレード基材を完全に露出させた後、300℃×1時間の焼鈍処理を行い、所定の寸法に剪断し実施例6の表面処理ブレードを作成した。
この実施例6の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0046】
実施例7〜22:
実施例5と同様に板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)に適宜前処理を行った後、めっき浴中の成分濃度および分散粒子の種類および添加量、電流密度、めっき時間を調整し各種めっきを施して、表2に示す実施例7〜22の表面処理ドクターブレードを作成した。これら表面処理ドクターブレードについてビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性、めっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0047】
実施例23:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、2.5 A)し、水洗後、ニッケルストライクめっき浴(塩化ニッケル:250g/L、塩酸125ml/L、浴温25℃)でめっきを行い1〜2μmのニッケル皮膜を形成させた後、水洗後、鉄−リンめっき(硫酸第一鉄(7水塩):400g/L、塩化第一鉄(4水塩):80g/L、次亜リン酸:2g/L、アトテックフェロプレート用添加剤A(アトテックジャパン(株)):30ml/L、アトテックフェロプレート用添加剤B(アトテックジャパン(株)):1ml/L、SiC(平均粒子径 0.5 μm):10g/L、浴温50℃、pH 1.6 )でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整し鉄−リン−SiC複合めっきを行い、水洗後、乾燥を行った。その後、ブレードの表面にバフ研磨を行い表面のめっき残渣等を完全に除去し、めっきブレード23を得た。
後処理工程:上記ブレード23に300℃×1時間の焼鈍処理を行った後、所定の寸法に剪断し、実施例23の表面処理ブレードを作成した。
この実施例23の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0048】
実施例24〜27:
実施例5と同様に板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)に適宜前処理を行った後、めっき浴中の成分濃度および分散粒子の種類および添加量、電流密度、めっき時間を調整し各種めっきを施して、表2に示す実施例24〜27の表面処理ドクターブレードを作成した。これら表面処理ドクターブレードについてビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性、およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
実施例28:
後処理工程が、刃先最先端のみを#2000のサンドペーパーで研磨し、刃先最先端のみ表面処理皮膜を除去し、刃先最先端のブレード基材を完全に露出させた後、300℃×1時間の焼鈍処理を行う以外は、実施例23と同様の方法で表面処理ドクターブレードを製造し、所定寸法へ剪断後、実施例28の表面処理ドクターブレードを得た。
この実施例28の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、耐磨耗性およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0049】
比較例1:
めっき工程1:板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、エンボス加工により表面に凹凸を付与した金属鋼帯よりなるスペーサーとともにリールに渦巻状に巻き取り、リールに巻いた状態のまま、50℃のアルカリ脱脂液(パクナRT−T 60g/L)に15分間浸漬し、水洗後、塩酸活性液中で15分間、塩酸活性処理し、さらに水洗した。その後、SiCを分散させた無電解Niめっき液(日本カニゼン(株)社製のめっき液、SC−80−1:20vol%、SC−80−4:2vol%、pH 4.7 )中に87℃で、めっき厚が所定膜厚になるまで浸漬し、SiCを含有したセラミック分散ニッケル複合めっきを行い水洗後、乾燥を行った。その後、スペーサーとブレードを巻き戻し分割し、めっきブレード(比較1)を得た。
後処理工程:上記めっきブレード(比較1)の表面にバフ研磨を行い表面のめっき残渣等を完全に除去後、300℃×1時間の焼鈍処理を行った後、所定の寸法に剪断し、比較例1のSiC分散ニッケル−リン複合めっきブレードを作成した。この表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、環境特性、およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0050】
比較例2:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、40A)し、水洗後、鉄めっき(金属鉄:200g/L、塩化第一鉄:470g/L、ホウ酸:40g/L、pH 0.3 、浴温70℃)でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整し鉄めっきを行い、水洗後、乾燥を行った。その後、ブレードの表面にバフ研磨を行い表面のめっき残渣等を完全に除去し、めっきブレード(比較2)を得た。
後処理工程:上記ブレード(比較2)はさらに300℃×1時間の焼鈍処理を行った後、所定の寸法に剪断し、比較例2の表面処理ブレードを作成した。この比較例2の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性、およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0051】
比較例3:
板幅50mm、板厚 0.15 mm、刃先長さ 1.4 mm、刃先先端厚 0.07 mm、片側、平行刃のドクターブレードスチール基材(鋼帯、全長50m)を、連続的に電解処理(パクナエクレーターJ:50m/L、NaOH:50g/L、30℃、2.5 A)し水洗後、電気クロムめっき(無水クロム酸:250g/L、HSO:2.5 g/L、HEEF25C(アトテックジャパン(株)):20ml/L、浴温57℃)でめっき厚が所定膜厚になるようにめっき電流およびめっき時間を調整しクロムめっきを行った。その後、水洗、乾燥し、クロムめっきブレード(比較3)を作成した。
後処理工程:上記めっきブレード(比較3)の表面にバフ研磨を行い、125℃×8時間の焼鈍処理を行った後、所定の寸法に剪断し、比較例3の表面処理ドクターブレードを作成した。この比較例3の表面処理ドクターブレードのビッカース硬度(Hv)、めっき厚、環境特性、耐磨耗性、およびめっき密着性を実施例1と同様にして測定評価した結果を表2にまとめて示す。
【0052】
【表2】
Figure 2004107731
【0053】
【発明の効果】
本発明によれば、従来品であるセラミック(SiC)分散ニッケル−リン複合めっき被覆ドクターブレードと同等以上の品質を有し、環境と人体にやさしい鉄−リン系金属めっき表面処理ドクターブレードが得られる。また、本発明の表面処理ドクターブレードは、めっき浴、排水処理のコストが従来技術と比較して低減できるため低コストで生産できる。
【図面の簡単な説明】
【図1】ドクターブレードを使用するグラビア(凹版)印刷の概念図である。
【図2】図1の部分拡大図である。
【符号の説明】
1 シリンダー(グラビア版)
2 ドクターブレード
3 インキ
4 めっき層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a doctor blade that has been subjected to a surface treatment by iron-phosphorus-based metal plating, and more specifically, a chrome-based metal-plated coated doctor blade, a doctor blade equivalent to or more than a nickel-based metal-plated coated doctor blade. The present invention relates to an iron-phosphorus-based metal plating coated surface treatment doctor blade having quality performance and being friendly to the environment and people.
[0002]
[Prior art and its problems]
In gravure (intaglio) printing, FIGS. 1 and 2 (partial enlarged views of FIG. 1; however, in FIGS. 1 and 2, the blade portion is drawn extremely enlarged with respect to the cylinder for easy understanding. ), A cylinder (1) in which a number of minute concave portions (not shown) called cells corresponding to images are formed on the surface of the cylinder, and a steel or stainless steel doctor blade ( 2) is pressed at a constant pressure, and the ink (3) adhering to the non-image portion of the plate surface is scraped off. Since this doctor blade has the function of completely removing the ink in the non-image area and leaving a predetermined amount of ink in the image area, the contact pressure between the cylinder and the doctor blade must always be kept constant. In addition, abrasion resistance is required at the tip (cutting edge), and a doctor blade whose surface has been subjected to a surface treatment is generally used.
[0003]
For example, as a surface treatment doctor blade using a chromium plating system, Patent Document 1 discloses that flexible steel is coated with chromium having a thickness of 5 μm or more and thinner than the thickness of a steel material, and then annealed at 110 to 145 ° C. after coating. There has been proposed a coating blade characterized in that the coating is performed.
[Patent Document 1]
Japanese Patent No. 2583611
[0004]
Patent Document 2 proposes a surface-treated doctor blade excellent in rust generation and abrasion resistance, which is composed of a first layer of a nickel-based alloy and an upper layer of chromium plating.
[Patent Document 2]
JP-A-3-64595
[0005]
As a doctor blade with a nickel-based surface treatment, a doctor blade with a composite plating in which fine particles of SiC are dispersed in a nickel-based metal (more specifically, a nickel-phosphorus alloy) matrix is generally used. However, in addition, Patent Document 3 proposes a doctor blade for intaglio printing, in which the surface of a doctor blade is nickel-plated with fluororesin particles dispersed therein, and Patent Document 4 discloses the method. There has been proposed a method of manufacturing a doctor blade comprising two-layer plating of Ni plating on the first layer and Ni plating containing ceramic powder on the first layer.
[Patent Document 3]
Japanese Utility Model Publication No. 01-101845
[Patent Document 4]
Japanese Patent No. 2952333
[0006]
However, these conventional techniques have the following problems.
The doctor blades coated with chromium plating proposed in Patent Documents 1 and 2 use a chemical solution in which chromium plating is made of hexavalent chromium at the time of surface treatment. There are problems such as the necessity and sufficient consideration in the hygiene management of the plating operator.
[0007]
In addition, nickel-based metal-plated doctor blades in which SiC is dispersed, and doctor blades proposed in Patent Documents 3 and 4 are widely used for gravure printing because the wear resistance of the cutting edge is significantly improved. However, in each case, the outermost layer of the blade is formed of a nickel-based metal. In recent years, it has become clear that this nickel metal is an allergen that causes allergies when it comes into contact with the human body, and the potential need to avoid contact with nickel metal as much as possible in the work environment is extremely high. There is a growing demand for surface treatment technology that does not use nickel metal as the main component on the outermost surface of the blade, which is likely to be treated. It has not been obtained yet.
[0008]
Therefore, an object of the present invention is to solve these problems of the prior art, and proposes a surface treatment for a doctor blade having a quality performance equal to or higher than that of the conventional technology and being friendly to the environment and the human body. Is to do.
[0009]
[Means for Solving the Problems]
The present inventors have conducted intensive studies on the surface treatment for doctor blades that can be changed to the prior art, and as a result, newly apply a specific iron-phosphorus-based metal plating as a surface treatment instead of chromium plating and nickel plating. As a result, the present inventors have found that a surface treatment doctor blade having a quality performance equal to or higher than that of the prior art and being friendly to the environment and humans can be obtained, and the present invention has been completed.
[0010]
That is, the doctor blade of the present invention has the following configuration.
1. A surface-treated doctor blade in which at least the surface of the cutting edge is made of iron-phosphorus-based metal plating.
2. 2. The surface-treated doctor blade according to the above item 1, wherein the iron-phosphorus-based metal plating is an iron-phosphorus-based composite plating in which ceramic fine particles and / or organic resin fine particles are dispersed.
3. 3. The surface-treated doctor blade according to the above item 2, wherein the ceramic is SiC.
4. 3. The surface treatment doctor blade according to the above item 2, wherein the organic resin is a fluororesin.
5. The surface-treated doctor blade according to any one of the above items 1 to 4, wherein the phosphorus content in the iron-phosphorus metal plating is 0.5 to 20% by mass.
6. The surface treatment doctor blade according to any one of the above items 1 to 5, wherein the plating thickness of the iron-phosphorus metal plating is 0.1 to 100 µm.
7. 3. The surface-treated doctor blade according to the above item 2, wherein the ceramic fine particles have a particle size of 0.03 to 6 μm.
8. 3. The surface-treated doctor blade according to the above item 2, wherein the organic resin fine particles have a particle size of 0.02 to 10 μm.
9. 9. The surface-treated doctor blade according to the above item 7 or 8, wherein the particle diameter of the ceramic fine particles and / or the organic resin fine particles is 0.5 times or less the plating film thickness.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
As the doctor blade substrate used in the present invention, any known steel and / or stainless steel substrates used for printing and painting can be used.
Also, usually, the base material for the doctor blade is subjected to processing such as step formation so that a side edge serving as a blade edge portion becomes a thin blade shape, and a parallel blade, an inclined blade is used depending on a difference in the shape of the blade. , Round blades and square blades, and any shape can be used. In addition, there is a single-blade type in which such cutting edge processing is performed on only one side of the blade, and a double-blade type in which both sides are performed on the both sides. In the present invention, any type can be used depending on the application. .
[0012]
In the present invention, there is no limitation on the dimensions of the blade base material, and the blade base material can be appropriately selected and used. However, a typical blade base material has a band shape having a thickness of 0.15 mm to 0.6 mm and a width of 40 to 60 mm. Made of steel plate.
[0013]
The surface-treated doctor blade according to the present invention comprises a surface-treated doctor blade obtained by applying an iron-phosphorus-based metal plating to at least the surface of the cutting edge of the doctor blade substrate. In the case of iron plating that does not contain phosphorus or surface treatment with a metal other than iron-phosphorus-based metal, abrasion resistance that can be changed to conventional nickel-based plating and chromium-based plating cannot be obtained, or cost reduction is required. It becomes considerably expensive and is not suitable for industrial use. In addition, conventional iron plating has poor corrosion resistance, and it is difficult to store it for a long time or export it to high temperature and humidity overseas.However, by using phosphorus-containing iron-phosphorus plating, amorphous plating Regions are formed, and the corrosion resistance is improved as compared with conventional iron plating. As a result, it is possible to cope with these by using together with rust preventive oil.
[0014]
Further, the abrasion resistance of the blade is further improved by including the ceramic fine particles and the organic resin fine particles alone or in a mixture of both in the matrix of the iron-phosphorus metal plating. This is because the ceramic fine particles and / or organic resin fine particles are dispersed in the metal matrix, so that the internal stress of plating is reduced and the adhesion is improved. It is considered that the excellent lubricating effect of the organic resin fine particles is due to a synergistic effect caused by being imparted to the metal matrix.
[0015]
The ceramic fine particles referred to in the present invention include, for example, Al 2 O 3 , Fe 2 O 3 , TiO 2 , ZrO 2 , SiO 2 , BeO 2 , MgO, diamond, SiC, TiC, WC, VC, ZrC, TaC, B 4 C, BN, ZrB 2 , TiN, Si 3 N 4 , WSi 2 Refers to at least one kind of particles selected from among the above. Among them, SiC is most preferable.
[0016]
Further, the particle diameter of the ceramic fine particles used in the present invention is preferably 0.03 to 6 μm. If the particle diameter is less than 0.03 μm, the adhesion to the substrate is poor, which is not preferable. On the other hand, if it exceeds 6 μm, the ceramic fine particles are likely to be missing from the plating, and in the missing film defect portion, printing defects such as stripes are likely to occur during continuous printing, and the effects of the present invention are not obtained and the present invention Not suitable.
The particle diameter of the more preferable ceramic fine particles is 0.1 to 3 μm, and the particle diameter of 0.3 to 1.5 μm is most preferable.
[0017]
Further, as the organic resin fine particles used in the present invention, a fluororesin is preferable from the viewpoint of the stability of the organic resin in the plating solution and the effect of imparting lubricity as a plating film. Examples of the fluororesin fine particles here include 4-fluoroethylene resin, perfluoroalkoxy resin, fluoroethylenepropylene resin, 4-fluoroethylene-perfluoroalkylvinylether copolymer resin, and 4-fluoroethylene- Resin particles such as an ethylene copolymer resin, a 3-fluoroethylene chloride resin, and a vinylidene fluoride resin, among which 4-fluoroethylene resin, perfluoroalkoxy resin, and fluoroethylenepropylene resin are preferable. Most preferred is a fluorinated ethylene resin.
[0018]
The particle diameter of the organic resin fine particles is preferably from 0.02 to 10 μm. If the particle diameter is less than 0.02 μm, the adhesion to the substrate is poor, which is not preferable. On the other hand, if it exceeds 10 μm, resin particles are likely to be missing from the plating, and in the missing film defect portion, printing defects such as stripes are likely to occur during continuous printing, and the effects of the present invention are not obtained and the present invention Not suitable. Among them, the preferred particle diameter is 0.05 to 5 μm, and more preferably 0.1 to 1 μm.
[0019]
Furthermore, in the present invention, in the relationship between the upper limit of the particle diameter of the ceramic fine particles or the organic resin fine particles and the plating film thickness of the plating layer in which these fine particles are dispersed, the upper limit of the particle size of the dispersed particles is Most preferably, it is 0.5 times or less. If the ratio exceeds 0.5 times, these fine particles or aggregated particles obtained by aggregating the fine particles are likely to be present as excessively protruding from the plating. Therefore, the particles protruding from the plating layer cause printing streaks on a printed material during continuous printing. This is not preferred in the present invention. A particularly preferred upper limit of the particle diameter is 0.3 times or less of the plating thickness, and most preferably 0.1 times or less.
The content of the ceramic fine particles and / or the organic resin fine particles in the plating is not particularly limited, but the preferred content is 1 to 55% by volume, more preferably 5 to 40% by volume, most preferably 10 to 10% by volume in the plating. 30% by volume.
[0020]
If it is less than 1% by volume, it is difficult to obtain the effect of improving the abrasion resistance, and if it is more than 50% by volume, the adhesion of the plating is inferior.
The content of phosphorus in the iron-phosphorus metal plating is preferably set to 0.5 to 20% by mass. If the phosphorus content is less than 0.5% by mass, the effect of improving the wear resistance is insufficient, and if it exceeds 20% by mass, the plating becomes brittle, and the wear resistance and adhesion are deteriorated. Absent. A more preferable phosphorus content is 1 to 15% by mass, and more preferably 2 to 8% by mass.
[0021]
In the present invention, the surface hardness of at least the edge portion after plating is set to 400 to 1500 in Vickers hardness (Hv). When the hardness is less than 400, in the gravure printing, a scraping defect is likely to occur, and in the initial stage of continuous printing, not only a printing defect such as an image shape defect is likely to occur, but also the abrasion resistance is inferior. Not suitable. On the other hand, if the Vickers hardness exceeds 1500, not only is the plating brittle and easily peeled, but also the plate surface of the cylinder is damaged, resulting in poor printing, which is not suitable for the present invention. Particularly preferred Vickers hardness (Hv) is from 600 to 1300, more preferably from 800 to 1200.
[0022]
The Vickers hardness (Hv) in the present invention is a value measured according to the Vickers hardness test of the microhardness test method of JIS Z 2251. It is also possible to measure using.).
[0023]
The thickness of the plating in the present invention is preferably 0.1 to 100 μm. If the plating thickness is less than 0.1 μm, the effect of abrasion resistance cannot be obtained, which is not suitable for the present invention. On the other hand, if it exceeds 100 μm, it is economically disadvantageous and the adhesion of the plating becomes poor, so that it is not suitable for the present invention. Particularly preferred film thickness is 1 to 50 μm, more preferably 3 to 30 μm.
[0024]
As a method for measuring the plating thickness, a known measuring method can be used.
For example, (1) a method of measuring the thickness of plating by measuring the amount of fluorescent X-ray emitted from the plating using a fluorescent X-ray measuring device, and (2) observing a vertical section of the plating with an optical microscope and an electron microscope. The thickness can be measured by appropriately selecting from the plating thickness testing methods shown in JIS H8501, such as a method of directly measuring the plating thickness.
[0025]
As described above, the surface-treated doctor blade according to the present invention is obtained by dispersing ceramic fine particles and / or organic resin fine particles in iron-phosphorus plating or iron-phosphorus plating depending on the application. In addition to the constituent components (iron, phosphorus, ceramic fine particles, organic resin fine particles), as a trace component, for example, a pH adjusting agent, a stress relaxing agent, a surface tension adjusting agent, an antifoaming agent, an antioxidant, which can be added to a plating bath , A reducing agent, a component caused by various additives such as a brightener, a component caused by a trace element included in water which is a solvent of a plating bath, or other, even if it contains a trace alloy component, the effect of the present invention There is no hindrance as long as the range is not impaired.
[0026]
The surface-treated doctor blade of the present invention can be manufactured using a known manufacturing technique.
As a production method, for example, it can be produced by degreasing → water washing → activation treatment → water washing → plating → water washing → drying → annealing → shearing to a predetermined size, and further, before and / or after annealing in the above-mentioned step. Alternatively, the cutting edge adjustment by the cutting edge polishing and the surface adjustment by the surface polishing may be performed, and the annealing step and / or the activation treatment step may be omitted.
Known plating techniques such as wet plating such as electroplating and electroless plating or dry plating such as thermal spraying and vapor deposition can be used as the plating method. In particular, from the viewpoint of cost, a method using wet plating is desirable.
[0027]
The plating bath in the wet plating is not particularly limited as long as it can form the iron-phosphorus-based metal plating of the present invention. Examples thereof include a ferrous sulfate bath, a ferrous chloride bath, and a borofluoride bath. Conventional iron plating baths such as an iron bath, a ferrous sulfamate bath, and a mixed bath of ferrous sulfate and ferrous chloride to which hypophosphorous acid and / or a salt thereof are added can be used. Further, it is possible to use a plating bath in which ceramic fine particles and organic resin fine particles are dispersed. Among these, a mixed bath of ferrous sulfate / ferrous chloride is most preferable from the viewpoint of bath stability and plating adhesion.
Of course, various additives such as a pH adjusting agent, a stress relaxing agent, a surface tension adjusting agent, an antifoaming agent, an antioxidant, a reducing agent, and a brightening agent can be appropriately added to these plating baths.
[0028]
Furthermore, in the present invention, in order to increase the adhesion between the blade substrate and the iron-phosphorus metal plating, or to promote the deposition of these plating films, the iron-phosphorus metal plating is preliminarily treated as a base treatment. It is also possible to perform base plating by nickel-based plating, copper-based plating, or the like. A nickel-based strike plating is effective as a particularly preferable base plating. Even if nickel plating is used as the base plating, the upper layer is plated with iron-phosphorus metal, so that nickel metal does not come into direct contact with people, so nickel plating is used as the base plating. There is no problem at all. In addition, in order to improve the conformability of the cutting edge described below, when performing the cutting edge of the cutting edge, the cross section of the underlying nickel layer may be exposed, although only slightly, at the cutting edge of the cutting edge. However, since the cutting edge of the cutting edge may cause a cut when a person makes contact with a bare hand, there is no particular problem since the person does not make contact with the bare hand after polishing.
[0029]
Further, in order to further improve the functionality of the surface treatment doctor blade according to the present invention, within a range that does not hinder the present invention, on the iron-phosphorus-based metal plating, further metal plating, organic resin film, inorganic film, A surface treatment such as an organic / inorganic composite film may be performed.
[0030]
In addition, when storing the surface-treated doctor blade according to the present invention, it is preferable to apply a rust-preventive oil or the like to the surface and store it.
[0031]
Embodiments of the surface treatment doctor blade of the present invention include the following, and there is no problem in adopting any of the embodiments.
(1) an embodiment in which the iron-phosphorus-based metal plating according to the present invention is applied to the entire surface of both sides of the blade (the front side (S side in FIG. 2) and the back side (R side in FIG. 2) in the cylinder rotation direction);
(2) An embodiment in which the iron-phosphorus-based metal plating according to the present invention is applied to one side of the entire blade surface, specifically, only the front side (S side in FIG. 2) of the blade edge or the entire back side (R side in FIG. 2) of the blade edge. Is subjected to the iron-phosphorus-based metal plating according to the present invention, and the other side is provided with another surface treatment coating or remains as steel without surface treatment,
(3) Iron-phosphorus-based metal plating according to the present invention on at least both sides (S side and R side in FIG. 2) of only the cutting edge,
(4) An embodiment in which at least one side of the cutting edge is plated with iron-phosphorus metal according to the present invention, specifically, the front side of the cutting edge (S side in FIG. 2) or the back side of the cutting edge (R side in FIG. 2). The iron-phosphorus-based metal plating according to the present invention is applied only to the cutting edge of the present invention, and the other side is subjected to other surface treatments or remains as unplated steel.
[0032]
At the time of continuous printing, when replacing a blade with a new one with a new one during continuous printing, the idle operation for 30 to 60 minutes is required to prevent printing defects such as streaks caused by poor contact between the cutting edge of the new blade and the cylinder. Is performed to improve the contact between the cylinder and the blade (hereinafter referred to as familiarity), and then printing is usually performed. This causes loss of idle operation time and lowers printing efficiency. Therefore, in order to improve the conformability, the tip of the blade of the surface treatment blade according to the present invention is polished with a buff, sandpaper or the like in advance to expose the blade base material at the forefront of the blade, so that the edge of the blade is adapted. It is also possible to improve the performance (reduce the idle operation time).
The iron-phosphorus-based metal plating surface-treated doctor blade obtained by the present invention can be suitably used for printing applications such as gravure printing, but it is used for coating purposes, for removing residual toner provided in image forming apparatuses, and the like. In other applications, the present invention can also be used in fields where nickel-plated doctor blades and chrome-plated doctor blades are currently used.
[0033]
【Example】
Hereinafter, the present invention will be described with reference to Examples and Comparative Examples, but the present invention is not limited by the following description.
The plating thickness and surface hardness of the surface-treated doctor blades of the examples and comparative examples were measured by the following methods.
[0034]
[Vickers hardness]
Five points were measured under the following conditions, and the average value was defined as Vickers hardness (Hv).
Measurement points: Blade edge front side (roll rotation direction front side (S side in FIG. 2)))
Measuring machine: Shimadzu Corporation HMV-2000,
Measurement conditions: test load 25 gf, holding time 10 seconds.
[Plating thickness]
The cross section of the cutting edge was observed with an electron microscope, and the plating thickness was measured.
[0035]
Example 1
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade After treatment (Pakna Eclator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 40 A), after washing with water, iron-phosphorus plating (ferrous sulfate (heptahydrate): 400 g / L, ferrous chloride) (Tetrahydrate): 80 g / L, hypophosphorous acid: 2 g / L, additive A for Atotech ferroplate (Atotech Japan Co., Ltd.): 30 ml / L, additive B for Atotech ferroplate (Atotech Japan Co., Ltd.) )): 1 ml / L, bath temperature 50 ° C., pH 1.6), the plating current and the plating time were adjusted so that the plating thickness became a predetermined film thickness, and iron-phosphorus plating was performed. After washing with water, drying was performed. Thereafter, the surface of the blade was buffed to completely remove plating residues and the like on the surface, and a plating blade 1 was obtained.
Post-treatment step: The blade 1 was further subjected to an annealing treatment at 300 ° C. × 1 hour, and then was sheared to a predetermined size to prepare a surface-treated doctor blade of Example 1.
Table 2 summarizes the Vickers hardness (Hv), plating thickness, and environmental properties, abrasion resistance and plating adhesion evaluation results of the surface treatment doctor blade of Example 1 measured and evaluated by the following methods.
[0036]
(1) Environmental characteristics
The environmental characteristics of the surface-treated doctor blade according to Example 1 were evaluated from the following viewpoints.
:: The surface treatment film does not contain chromium and nickel-based metals.
:: Chromium is not contained in the surface treatment film. Alternatively, a nickel-based metal is used as an undercoat for the surface treatment, but the nickel-based metal is not exposed in the outermost layer, and the outermost layer coating does not contain chromium and nickel-based metal.
Δ: Chromium is not contained in the surface treatment film. Alternatively, the nickel-based metal as a base film is slightly exposed by polishing a part of the cutting edge only at the tip of the cutting edge, but the outermost layer coating of the portion other than the tip of the cutting edge does not contain chromium and nickel-based metal.
×: Either chromium or nickel-based metal is contained in the surface treatment film.
[0037]
(2) Abrasion resistance
The surface treatment doctor blade according to Example 1 was mounted on the printing machine, and after performing appropriate running-in operation of the blade in advance, continuous printing was performed using oil-based ink and water-based ink. The point at which printing defects such as blurring, blurring, and the like occurred was defined as the life of the blade, and was compared with the life of a later-described SiC-dispersed nickel-phosphorus composite plating blade (Comparative Example 1) and evaluated according to the criteria shown in Table 1 below.
[0038]
[Table 1]
Figure 2004107731
[0039]
[Evaluation criteria]
1: The life is equal to or better than that of the SiC-dispersed nickel-phosphorus composite plating blade (Comparative Example 1).
2: The life is slightly inferior to the SiC-dispersed nickel-phosphorus composite plating blade (Comparative Example 1).
3: The life is significantly inferior to the SiC-dispersed nickel-phosphorus composite plating blade (Comparative Example 1).
[0040]
(3) Plating adhesion
The surface-treated doctor blade according to Example 1 was bent at a predetermined angle in accordance with JIS H 8504, and then a tape peeling test was performed on the bent bent portion, and the presence or absence of peeling of plating was visually observed. The evaluation was based on criteria.
:: good (no plating peeling),
Δ: Somewhat poor (slight plating peeling off),
×: Poor (large plating peeling).
Table 2 summarizes the above results.
[0041]
Example 2:
A surface-treated doctor blade was produced in the same manner as in Example 1 except that the annealing step, which is a post-treatment step, was not performed, and after being sheared to a predetermined size, a surface-treated doctor blade of Example 2 was obtained.
The Vickers hardness (Hv), plating thickness, environmental characteristics, abrasion resistance and plating adhesion of the surface-treated doctor blade of Example 2 were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0042]
Example 3
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade Treatment (Pakna Eclator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 40 A), washing with water, hydrochloric acid activation treatment, washing with water, and then iron-phosphorus plating (ferrous sulfate (ferrate 7): 400 g / L, ferrous chloride (tetrahydrate): 80 g / L, hypophosphorous acid: 2 g / L, additive for Atotech ferroplate A (Atotech Japan Co., Ltd.): 30 ml / L, additive for Atotech ferroplate B (Atotech Japan Co., Ltd.): 1 ml / L, SiC (average particle diameter 0.5 μm): 10 g / L, bath temperature 50 ° C., pH 1.6) so that the plating thickness becomes a predetermined film thickness. Adjust current and plating time - perform phosphorus -SiC composite plating, washed with water, was dried. Thereafter, the surface of the blade was buffed to completely remove plating residues and the like on the surface, and a plating blade 3 was obtained.
Post-treatment step: The blade 3 was further subjected to an annealing treatment at 300 ° C. × 1 hour, and then was sheared to a predetermined size to prepare a surface-treated blade of Example 3.
The Vickers hardness (Hv), plating thickness, environmental properties, abrasion resistance and plating adhesion of the surface-treated doctor blade of Example 3 were measured and evaluated in the same manner as in Example 1, and the results are summarized in Table 2. Show.
[0043]
Example 4:
A surface-treated doctor blade was manufactured in the same manner as in Example 3 except that the annealing step, which is a post-treatment step, was not performed, and the surface-treated doctor blade of Example 4 was obtained after shearing to a predetermined size.
The Vickers hardness (Hv), plating thickness, abrasion resistance and plating adhesion of the surface treated doctor blade of Example 4 were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0044]
Example 5:
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade After treatment (Pakna Eclator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 40 A), after washing with water, iron-phosphorus plating (ferrous sulfate (heptahydrate): 400 g / L, ferrous chloride) (Tetrahydrate): 80 g / L, hypophosphorous acid: 2 g / L, Atotech ferroplate additive A (Atotech Japan Co., Ltd.): 30 ml / L, Atotech ferroplate additive B (Atotech Japan Co., Ltd.) )): 1 ml / L, SiC (average particle size: 0.5 μm): 10 g / L, bath temperature: 50 ° C., pH: 1.6) Adjust the plating current and plating time so that the plating thickness becomes a predetermined film thickness. Iron-phosphorus-SiC composite Do Kki. After washing with water, drying was performed. Thereafter, the surface of the blade was buffed to completely remove the plating residue and the like on the surface, and a plating blade 5 was obtained.
Post-treatment step: The blade 5 was further subjected to an annealing treatment at 300 ° C. × 1 hour, and then was sheared to a predetermined size to prepare a surface-treated blade of Example 5.
The Vickers hardness (Hv), plating thickness, environmental characteristics, abrasion resistance and plating adhesion of the surface-treated doctor blade of Example 5 were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0045]
Example 6:
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade After treatment (Pakna Eclator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 40 A), after washing with water, iron-phosphorus plating (ferrous sulfate (heptahydrate): 400 g / L, ferrous chloride) (Tetrahydrate): 80 g / L, hypophosphorous acid: 2 g / L, Atotech ferroplate additive A (Atotech Japan Co., Ltd.): 30 ml / L, Atotech ferroplate additive B (Atotech Japan Co., Ltd.) )): 1 ml / L, SiC (average particle size: 0.5 μm): 10 g / L, bath temperature: 50 ° C., pH: 1.6) Adjust the plating current and plating time so that the plating thickness becomes a predetermined film thickness. Iron-phosphorus-SiC composite Do Kki. After washing with water, drying was performed. Thereafter, the surface of the blade was buffed to completely remove the plating residue and the like on the surface, thereby obtaining a plating blade 6.
Post-processing step: Only the tip of the blade 6 is polished with # 2000 sandpaper to remove the surface treatment film only at the tip of the blade 6 and completely expose the blade base material at the tip of the blade, and then at 300 ° C. An annealing treatment for × 1 hour was performed, and the sheet was sheared to a predetermined size to prepare a surface-treated blade of Example 6.
The Vickers hardness (Hv), plating thickness, environmental characteristics, abrasion resistance and plating adhesion of the surface-treated doctor blade of Example 6 were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0046]
Examples 7 to 22:
As in Example 5, plate width 50 mm, plate thickness 0.15 mm, blade length 1.4 mm, blade tip thickness 0.07 mm, single-sided, parallel blade doctor blade steel base material (steel strip, total length 50 m) After appropriately performing the pretreatment, the composition concentration and the type and amount of the dispersed particles in the plating bath, the addition amount, the current density, and the plating time were adjusted, and various platings were performed, and the surface treatments of Examples 7 to 22 shown in Table 2 I made a doctor blade. The Vickers hardness (Hv), plating thickness, environmental characteristics, abrasion resistance, and plating adhesion of these surface-treated doctor blades were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0047]
Example 23:
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade Treatment (Pakna Eclator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 2.5 A), washing with water, and nickel strike plating bath (nickel chloride: 250 g / L, hydrochloric acid 125 ml / L, bath temperature 25) ° C) to form a nickel film having a thickness of 1 to 2 µm, and after washing with water, iron-phosphorus plating (ferrous sulfate (heptahydrate): 400 g / L, ferrous chloride (tetrahydrate): 80 g / L, hypophosphorous acid: 2 g / L, Atotech ferroplate additive A (Atotech Japan KK): 30 ml / L, Atotech ferroplate additive B (Atotech Japan KK): 1 ml / L , Si (Average particle diameter 0.5 μm): iron-phosphorus-SiC composite plating by adjusting plating current and plating time so that the plating thickness becomes a predetermined thickness at 10 g / L, bath temperature 50 ° C., pH 1.6). After washing with water, drying was performed. Thereafter, the surface of the blade was buffed to completely remove the plating residue and the like on the surface, thereby obtaining a plating blade 23.
Post-treatment step: After performing an annealing treatment at 300 ° C. for 1 hour, the blade 23 was sheared to a predetermined size to prepare a surface-treated blade of Example 23.
The Vickers hardness (Hv), plating thickness, abrasion resistance and plating adhesion of the surface-treated doctor blade of Example 23 were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0048]
Examples 24 to 27:
As in Example 5, plate width 50 mm, plate thickness 0.15 mm, blade length 1.4 mm, blade tip thickness 0.07 mm, single-sided, parallel blade doctor blade steel base material (steel strip, total length 50 m) After appropriately performing the pretreatment, the plating was performed by adjusting the component concentration in the plating bath and the type and amount of the dispersed particles, the current density, and the plating time to perform various plating, and the surface treatments of Examples 24 to 27 shown in Table 2 were performed. I made a doctor blade. Table 2 shows the results of measurement and evaluation of Vickers hardness (Hv), plating thickness, environmental properties, abrasion resistance, and plating adhesion of these surface-treated doctor blades in the same manner as in Example 1.
Example 28:
In the post-processing step, only the tip of the blade is polished with # 2000 sandpaper to remove the surface treatment film only at the tip of the blade and completely expose the blade base material at the tip of the blade. A surface-treated doctor blade of Example 28 was obtained by manufacturing a surface-treated doctor blade in the same manner as in Example 23 except that the annealing treatment was performed.
The Vickers hardness (Hv), plating thickness, abrasion resistance and plating adhesion of the surface-treated doctor blade of Example 28 were measured and evaluated in the same manner as in Example 1, and the results are shown in Table 2.
[0049]
Comparative Example 1:
Plating process 1: 50 mm width, 0.15 mm thickness, 1.4 mm blade length, 0.07 mm blade tip thickness, one side, parallel blade doctor blade steel base material (steel strip, total length 50 m), It is spirally wound around a reel together with a spacer made of a metal steel strip having an uneven surface by embossing, and is then wound in a reel for 15 minutes in an alkaline degreasing solution (Pakuna RT-T 60 g / L) at 50 ° C. After immersion and washing with water, the mixture was subjected to a hydrochloric acid activation treatment in a hydrochloric acid active solution for 15 minutes, and further washed with water. Thereafter, 87 was placed in an electroless Ni plating solution in which SiC was dispersed (plating solution manufactured by Nippon Kanigen Co., Ltd., SC-80-1: 20 vol%, SC-80-4: 2 vol%, pH 4.7). The substrate was immersed at a temperature of 0 ° C. until the plating thickness reached a predetermined thickness, followed by ceramic dispersion nickel composite plating containing SiC, washing with water, and drying. Thereafter, the spacer and the blade were rewound and divided to obtain a plating blade (Comparative 1).
Post-treatment step: After buffing the surface of the plating blade (Comparative 1) to completely remove plating residues and the like on the surface, performing an annealing treatment at 300 ° C. for 1 hour, and then shearing to a predetermined size. The SiC-dispersed nickel-phosphorus composite plating blade of Example 1 was produced. The Vickers hardness (Hv), plating thickness, environmental characteristics, and plating adhesion of this surface-treated doctor blade were measured and evaluated in the same manner as in Example 1, and Table 2 summarizes the results.
[0050]
Comparative Example 2:
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade Treated (Pakna Eclator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 40 A), washed with water, and then plated with iron (metallic iron: 200 g / L, ferrous chloride: 470 g / L, boric acid: 40 g) / L, pH 0.3, bath temperature 70 ° C.), the plating current and the plating time were adjusted so that the plating thickness became a predetermined film thickness, iron plating was performed, washed with water, and dried. Thereafter, the surface of the blade was buffed to completely remove the plating residue and the like on the surface, thereby obtaining a plating blade (Comparative 2).
Post-treatment step: The blade (Comparative 2) was further subjected to an annealing treatment at 300 ° C. × 1 hour, and then was sheared to a predetermined size to prepare a surface-treated blade of Comparative Example 2. The Vickers hardness (Hv), plating thickness, environmental characteristics, abrasion resistance, and plating adhesion of the surface-treated doctor blade of Comparative Example 2 were measured and evaluated in the same manner as in Example 1, and the results are summarized in Table 2. .
[0051]
Comparative Example 3:
Continuous electrolysis of a doctor blade steel substrate (steel strip, total length 50m) with a plate width of 50mm, a plate thickness of 0.15mm, a blade length of 1.4mm, a blade tip thickness of 0.07mm, one side, parallel blade After treatment (Pakunaekurator J: 50 m / L, NaOH: 50 g / L, 30 ° C., 2.5 A), washing with water, electrochromic plating (chromic anhydride: 250 g / L, H 2 SO 4 : 2.5 g / L, HEEF25C (Atotech Japan Co., Ltd .: 20 ml / L, bath temperature 57 ° C), chromium plating was performed by adjusting the plating current and the plating time so that the plating thickness became a predetermined film thickness. . Thereafter, the plate was washed with water and dried to prepare a chrome plating blade (Comparative 3).
Post-treatment step: The surface of the plating blade (Comparative 3) was buffed, annealed at 125 ° C. for 8 hours, and then sheared to a predetermined size to prepare a surface-treated doctor blade of Comparative Example 3. . The Vickers hardness (Hv), plating thickness, environmental properties, abrasion resistance, and plating adhesion of the surface-treated doctor blade of Comparative Example 3 were measured and evaluated in the same manner as in Example 1, and Table 2 summarizes the results. .
[0052]
[Table 2]
Figure 2004107731
[0053]
【The invention's effect】
According to the present invention, it is possible to obtain an iron-phosphorus-based metal-plated surface-treated doctor blade having a quality equal to or higher than that of a conventional ceramic (SiC) -dispersed nickel-phosphorus composite plating-coated doctor blade and friendly to the environment and the human body. . In addition, the surface treatment doctor blade of the present invention can be produced at low cost because the cost of the plating bath and the wastewater treatment can be reduced as compared with the prior art.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of gravure (intaglio) printing using a doctor blade.
FIG. 2 is a partially enlarged view of FIG.
[Explanation of symbols]
1 cylinder (gravure version)
2 Doctor blade
3 ink
4 Plating layer

Claims (9)

少なくとも刃先部の表面が、鉄−リン系金属めっきよりなる表面処理ドクターブレード。A surface-treated doctor blade in which at least the surface of the cutting edge is made of iron-phosphorus-based metal plating. 鉄−リン系金属めっきが、セラミック微粒子および/または有機樹脂微粒子が分散した鉄−リン系複合めっきである請求項1に記載の表面処理ドクターブレード。The surface-treated doctor blade according to claim 1, wherein the iron-phosphorus metal plating is iron-phosphorus composite plating in which ceramic fine particles and / or organic resin fine particles are dispersed. セラミックがSiCである請求項2に記載の表面処理ドクターブレード。The doctor blade according to claim 2, wherein the ceramic is SiC. 有機樹脂がフッ素系樹脂である請求項2に記載の表面処理ドクターブレード。The surface treated doctor blade according to claim 2, wherein the organic resin is a fluororesin. 鉄−リン系金属めっき中のリン含有量が0.5〜20質量%である請求項1乃至4のいずれか1項に記載の表面処理ドクターブレード。The surface treatment doctor blade according to any one of claims 1 to 4, wherein the phosphorus content in the iron-phosphorus metal plating is 0.5 to 20% by mass. 鉄−リン系金属めっきのめっき厚が、0.1〜100μmである請求項1乃至5のいずれか1項に記載の表面処理ドクターブレード。The surface treatment doctor blade according to any one of claims 1 to 5, wherein the plating thickness of the iron-phosphorus metal plating is 0.1 to 100 µm. セラミック微粒子の粒子径が、0.03〜6μmである請求項2に記載の表面処理ドクターブレード。The surface-treated doctor blade according to claim 2, wherein the particle diameter of the ceramic fine particles is 0.03 to 6 m. 有機樹脂微粒子の粒子径が、0.02〜10μmである請求項2に記載の表面処理ドクターブレード。The surface-treated doctor blade according to claim 2, wherein the particle diameter of the organic resin fine particles is 0.02 to 10 m. セラミック微粒子および/または有機樹脂微粒子の粒子径が、めっき膜厚の 0.5倍以下である請求項7または8に記載の表面処理ドクターブレード。The surface treated doctor blade according to claim 7 or 8, wherein the particle diameter of the ceramic fine particles and / or the organic resin fine particles is not more than 0.5 times the plating film thickness.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007254860A (en) * 2006-03-24 2007-10-04 Fujitsu Ltd Plating film and method for forming the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112396A (en) * 1984-06-29 1986-01-20 Toray Ind Inc Doctor blade
JPS6213577A (en) * 1985-07-12 1987-01-22 Nippon Piston Ring Co Ltd Sliding member
JPH02119663A (en) * 1988-10-29 1990-05-07 Riken Corp Internal combustion engine
JPH08118586A (en) * 1994-10-21 1996-05-14 Nippon New Chrome Kk Method and apparatus for plating doctor blade
JPH10278222A (en) * 1997-04-02 1998-10-20 Nippon New Chrome Kk Method and apparatus for continuous ceramic complex plating to long doctor base-metal
JPH1151187A (en) * 1997-08-04 1999-02-23 Teikoku Piston Ring Co Ltd Piston ring
JP2002200731A (en) * 2000-12-28 2002-07-16 Nippon New Chrome Kk Doctor blade and its manufacturing method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112396A (en) * 1984-06-29 1986-01-20 Toray Ind Inc Doctor blade
JPS6213577A (en) * 1985-07-12 1987-01-22 Nippon Piston Ring Co Ltd Sliding member
JPH02119663A (en) * 1988-10-29 1990-05-07 Riken Corp Internal combustion engine
JPH08118586A (en) * 1994-10-21 1996-05-14 Nippon New Chrome Kk Method and apparatus for plating doctor blade
JPH10278222A (en) * 1997-04-02 1998-10-20 Nippon New Chrome Kk Method and apparatus for continuous ceramic complex plating to long doctor base-metal
JPH1151187A (en) * 1997-08-04 1999-02-23 Teikoku Piston Ring Co Ltd Piston ring
JP2002200731A (en) * 2000-12-28 2002-07-16 Nippon New Chrome Kk Doctor blade and its manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007254860A (en) * 2006-03-24 2007-10-04 Fujitsu Ltd Plating film and method for forming the same

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