JP3754973B2 - 湿式現像用電子写真感光体,電子写真画像形成装置,及び電子写真カートリッジ - Google Patents
湿式現像用電子写真感光体,電子写真画像形成装置,及び電子写真カートリッジ Download PDFInfo
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Description
(1)電荷輸送物質を重合させて,溶出されないようにする。
(2)耐現像剤特性が優秀な表面保護層を設けて,溶媒が感光層内に浸透することを防止する。
(3)樹脂の耐現像剤特性を高め,溶媒が感光層内に浸透することを防止する。
透過係数=(透過流速×膜厚さ)÷圧力差・・・(数式1)
ガンマ型チタニルオキシフタロシアニン(γ−TiOPc)3重量部,化学式4に表示されるポリエステル樹脂(カネボウ社製,O−PET)(m/n=7/3,Mw=50000)2重量部をクロロホルム45重量部と混合し,サンドミルで1時間粉砕して分散液を得る。
化学式4に表示されるポリエステル樹脂の代りに,ビスフェノールA型ポリカーボネート樹脂(帝人化成社製,“PANLITEC−1400”)を使用したことを除いては,実施例1と同じ方法で厚さ20μmの断層型電子写真感光体を得る。前記“OX−TRAN”の透過係数測定機を利用して測定した結果,この感光層の酸素ガス透過率は1.3×10−11cm3(STP)・cm/s・cm2・cmHgである。
実施例1で使用したのと同じアルミニウム製ドラム上にガンマ型チタニルオキシフタロシアニン7重量部,ポリビニルブチルアル樹脂(積水化学社製,“S−LECBH−3”)3重量部,エチルアセテート290重量部を混合し,サンドミルで粉砕して得た分散液を,リングコーティング法で塗布した後,乾燥して厚さ0.4μmの電荷発生層を形成した。この電荷発生層上に,化学式5に表示されるポリエステル樹脂(ISONOVA社製,“ISARYL25S”)70重量部,化学式11に表示される正孔輸送物質30重量部をクロロホルム300重量部に溶解させた溶液を,同様に塗布した後,約100℃で1時間程度乾燥し,厚さ20μmの電荷輸送層を形成し,積層型電子写真感光体を得る。
前記“OX−TRAN”の透過係数測定機を利用して測定した結果,この電荷輸送層の酸素ガス透過率は,0.89×10−13cm3(STP)・cm/s・cm2・cmHgである。
化学式5に表示されるポリエステル樹脂の代りに,ポリカーボネートZ樹脂(三菱ガス化学社製,“IUPILONZ−200”)を使用したことを除いては,実施例2と同じ方法で厚さ20μmの電荷輸送層を有する積層型電子写真感光体を得る。前記“OX−TRAN”の透過係数測定機を利用して測定した結果,この電荷輸送層の酸素ガス透過率は,9.5×10−12cm3(STP)・cm/s・cm2・cmHgである。
前記各感光体の耐液体現像剤特性を評価するために,脂肪族系炭化水素を主成分とするパラフィン系溶媒(Exxon Chemical社製,“Isopar L”)を充填した容器(容積500ml)に感光体を浸漬し,室温(25℃)環境で10日間放置した後,感光体表面及び溶媒の変化を観察した。その結果を表1に示す。
前記各感光体の電子写真特性をドラム感光体評価装置(QEA社製,“PDT−2000”)を使用して測定した。
2 有機感光層
3 表面層
4 中間層
10 電子写真感光体
Claims (18)
- 導電性支持体と,
前記導電性支持体上に形成された有機感光層と,
を含み,
前記有機光感層の表面層が少なくとも高分子化合物よりなる結着樹脂と低分子化合物よりなる電荷輸送物質とを含有し,前記有機光感層の酸素ガス透過係数が5×10−13cm3(STP)・cm/s・cm2・cmHg以下であり,
前記結着樹脂が下記化学式1に表示されるビフェニルフルオレン単位を主鎖中に有する高分子化合物よりなり,
前記高分子化合物が下記化学式4,5,6または7で表示されることを特徴とする,湿式現像用電子写真感光体:
- 前記表面層での結着樹脂の比率は,60〜90重量%の範囲内であることを特徴とする,請求項1に記載の湿式現像用電子写真感光体。
- 前記導電性支持体と有機感光層間に前記導電性支持体の対する前記有機感光層の結着性を向上させるための中間層をさらに含むことを特徴とする,請求項1に記載の湿式現像用電子写真感光体。
- 前記導電性支持体と有機感光層間に前記導電性支持体からの電荷注入を防止するための中間層をさらに含むことを特徴とする,請求項1に記載の湿式現像用電子写真感光体。
- 液体現像剤を利用する現像ユニットを備えた電子写真画像形成装置であって,
前記液体現像剤は電子写真感光体の表面に直接接触でき,
前記電子写真感光体は導電性支持体及び前記導電性支持体上に形成された有機感光層を含み,
前記有機光感層の表面層が少なくとも,高分子化合物よりなる結着樹脂と低分子化合物よりなる電荷輸送物質とを含有し,前記有機光感層の酸素ガス透過係数が5×10−13cm3(STP)・cm/s・cm2・cmHg以下である電子写真感光体であり,
前記結着樹脂が下記化学式1に表示されるビフェニルフルオレン単位を主鎖中に有する高分子化合物よりなり,
前記高分子化合物が下記化学式4,5,6または7で表示されることを特徴とする,電子写真画像形成装置。
- 前記表面層での結着樹脂の比率は,60〜90重量%の範囲内であることを特徴とする,請求項7に記載の電子写真画像形成装置。
- 前記電子写真感光体は,前記導電性支持体と有機感光層間に前記導電性支持体に対する前記有機感光層の結着性を向上させるための中間層をさらに含むことを特徴とする,請求項7に記載の電子写真画像形成装置。
- 前記電子写真感光体は,前記導電性支持体と有機感光層間に前記導電性支持体からの電荷注入を防止するための中間層をさらに含むことを特徴とする,請求項7に記載の電子写真画像形成装置。
- 導電性支持体上に形成された有機感光層を含み,
前記有機感光層の表面層が少なくとも,高分子化合物よりなる結着樹脂と低分子化合物よりなる電荷輸送物質とを含有し,前記有機光感層の酸素ガス透過係数が5×10−13cm3(STP)・cm/s・cm2・cmHg以下である電子写真感光体と,
前記電子写真感光体を帯電させる帯電装置と,
前記電子写真感光体に形成された静電潜像を現像する現像装置と,
前記電子写真感光体の表面をクリーニングするクリーニング装置を含み,
前記結着樹脂が下記化学式1に表示されるビフェニルフルオレン単位を主鎖中に有する高分子化合物よりなり,
前記高分子化合物が下記化学式4,5,6または7で表示され,
画像形成装置に付着されるか,または前記画像形成装置から脱着されうる,電子写真カートリッジ。 - 前記表面層での結着樹脂の比率は,60〜90重量%の範囲内であることを特徴とする,請求項13に記載の電子写真カートリッジ。
- 前記電子写真感光体は,前記導電性支持体と有機感光層間に前記導電性支持体に対する前記有機感光層の結着性を向上させるための中間層をさらに含むことを特徴とする,請求項13に記載の電子写真カートリッジ。
- 前記電子写真感光体は,前記導電性支持体と有機感光層間に前記導電性支持体からの電荷注入を防止するための中間層をさらに含むことを特徴とする,請求項13に記載の電子写真カートリッジ。
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US9145383B2 (en) | 2012-08-10 | 2015-09-29 | Hallstar Innovations Corp. | Compositions, apparatus, systems, and methods for resolving electronic excited states |
US9125829B2 (en) | 2012-08-17 | 2015-09-08 | Hallstar Innovations Corp. | Method of photostabilizing UV absorbers, particularly dibenzyolmethane derivatives, e.g., Avobenzone, with cyano-containing fused tricyclic compounds |
WO2014025370A1 (en) | 2012-08-10 | 2014-02-13 | Hallstar Innovations Corp. | Tricyclic energy quencher compounds for reducing singlet oxygen generation |
JP6624093B2 (ja) * | 2017-01-27 | 2019-12-25 | 京セラドキュメントソリューションズ株式会社 | 電子写真感光体、プロセスカートリッジ、及び画像形成装置 |
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US4562132A (en) * | 1984-11-19 | 1985-12-31 | Xerox Corporation | Photoresponsive imaging members containing electron transport overcoatings |
US5013623A (en) * | 1989-01-10 | 1991-05-07 | Mitsubishi Paper Mills Limited | Electrophotographic photoreceptor with stilbene compound |
US5368967A (en) | 1993-12-21 | 1994-11-29 | Xerox Corporation | Layered photoreceptor with overcoat containing hydrogen bonded materials |
JP3939775B2 (ja) * | 1994-10-31 | 2007-07-04 | 株式会社リコー | 電子写真感光体 |
JPH1020515A (ja) * | 1996-07-03 | 1998-01-23 | Dainippon Ink & Chem Inc | 電子写真用感光体 |
JP2002182408A (ja) * | 2000-12-18 | 2002-06-26 | Kyocera Mita Corp | 単層型電子写真感光体 |
KR100449718B1 (ko) * | 2002-03-21 | 2004-09-22 | 삼성전자주식회사 | 전자사진적인 화상 형성방법 |
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US20040137345A1 (en) | 2004-07-15 |
KR20040032381A (ko) | 2004-04-17 |
KR100503069B1 (ko) | 2005-07-21 |
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