JP6758417B2 - 電子写真感光体および画像形成装置 - Google Patents
電子写真感光体および画像形成装置 Download PDFInfo
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- JP6758417B2 JP6758417B2 JP2018559616A JP2018559616A JP6758417B2 JP 6758417 B2 JP6758417 B2 JP 6758417B2 JP 2018559616 A JP2018559616 A JP 2018559616A JP 2018559616 A JP2018559616 A JP 2018559616A JP 6758417 B2 JP6758417 B2 JP 6758417B2
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- electrophotographic photosensitive
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Classifications
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
本実施形態に係る電子写真感光体について、図1A、図1Bを用いて説明する。
プラズマCVD装置2は、支持体3を真空反応室4に収容したものであり、回転手段5、原料ガス供給手段6および排気手段7をさらに備えている。
次に、プラズマCVD装置2を用いた堆積膜の形成方法について、円筒状基体10に感光層11としてアモルファスシリコン(a−Si)膜が、表面保護層12としてアモルファス炭化シリコン(a−SiC)膜とアモルファスカーボン(a−C)膜とが積層された電子写真感光体1(図1A、図1Bを参照)を作製する場合を例にとって説明する。
(O)含有ガスまたはその両方を含有させたものを用いることもできる。
本発明の実施形態に係る画像形成装置について、図6を用いて説明する。
本発明の実施形態に係る電子写真感光体1について、次の通り評価を行なった。
<円筒状基体10>
円筒状基体10は、アルミニウム合金の素管(外径:30mm、長さ360mm)を用いて作製した。円筒状基体10の外表面に対して、鏡面加工、およびウェットブラスト加工を行ない、洗浄した。
研磨材濃度:10〜18%
投射エア圧:0.10〜0.35MPa
投射距離(ワーク中心とブラストヘッド間距離):20〜300mm
投射時間:1〜60秒間
ワーク回転数:120〜180rpm
なお、異なる材質・粒径の研磨材を用いることによってSalの値を調整するとともに、投射エア圧、投射距離および投射時間(1〜60秒間)を変化させることによって、Strの値を調整した。
電荷注入阻止層11aは、アモルファスシリコン(a−Si)に窒素(N)および酸素(O)を加えたアモルファスシリコン(a−Si)系材料に、ドーパントとしてホウ素(B)を含有させたものである。
光導電層11bは、アモルファスシリコン(a−Si)に炭素(C)、窒素(N)および酸素(O)などを加えたアモルファスシリコン(a−Si)系材料に、ドーパントとしてホウ素(B)を含有させたものである。
表面保護層12は、アモルファス炭化シリコン(a−SiC)とアモルファスカーボン(a−C)とを積層した構成である。
電子写真感光体1は、Salの値に起因して初期不良が生じた場合(サンプル14および15)を除き、Strの値が0.67以上の場合(サンプル2,3,5,6,8,9,11および12)には、優れた効果を奏することが分かった。その中でも、Strの値が0.79以上の場合(サンプル3,6,9および12)には、より優れた効果を奏することが分かった。
次に、先に述べた第1〜第3実施形態で説明した、円筒状基体の端部に「面取り面」を設けた電子写真感光体1A,1Cについて、次の通り評価を行なった。
円筒状基体は、実施例1と同様の、アルミニウム合金の素管(外径:30mm、長さ360mm)を用いて作製した。円筒状基体の外表面に対して、面取り加工を含む鏡面加工を行った後、ウェットブラスト加工を行ない、洗浄した。
そして、上記サンプルNo.16〜24に、実施例1と同様、プラズマCVD装置2を用いて、表面層を成膜した。完成後の電子写真感光体の外表面(印画部)を目視により観察して、「膜剥がれ」の有無により、電子写真感光体製品としての品質を判定した。なお、評価は、膜剥がれの発生がほとんど見られない製品を「○」で、膜剥がれの痕跡が見られるが印画部に問題のない製品を「△」、膜剥がれが発生し印画部まで影響が及んでいる物を「×」で評価した。結果を「表3」に示す。
1A〜1C 電子写真感光体
2 プラズマCVD装置
3 支持体
4 真空反応室
5 回転手段
6 原料ガス供給手段
7 排気手段
10 円筒状基体
10a 基体外周面
10b 基体端面
11 感光層
11a 電荷注入阻止層
11b 光導電層
12 表面保護層
13 表面層
20 電子写真感光体
20a 基体外周面
20b 面取り面(C面)
20c 基体端面
21 電子写真感光体
21a 基体外周面
21b 面取り面(R面)
21c 基体端面
22 電子写真感光体
22a 基体外周面
22b 外側面取り面
22c 内側面取り面
22d 基体端面
30 フランジ部
31 導電性支柱
32 絶縁材
33 導板
34 直流電源
35 制御部
36 セラミックパイプ
37 ヒータ
38 ダミー基体
38A 下ダミー基体
38B 中間ダミー基体
38C 上ダミー基体
40 円筒状電極
41,42 プレート
43,44 絶縁部材
42A,44A ガス排出口
45a,45b ガス導入口
46 ガス吹き出し孔
49 圧力計
50 回転モータ
51 回転力伝達機構
52 回転導入端子
53 絶縁軸部材
54 絶縁平板
60〜63 原料ガスタンク
64 ドーパント専用ガスタンク
60A〜64A,65a,65b 配管
60B〜64B,60C〜64C バルブ
60D〜64D マスフローコントローラ
71 メカニカルブースタポンプ
72 ロータリーポンプ
100 画像形成装置
111 帯電器
112 露光器
113 現像器
113A 磁気ローラ
113C トナー撹拌用搬送スクリュー
114 転写器
114A 転写用チャージャ
114B 分離用チャージャ
115 定着器
115A,115B 定着ローラ
116 クリーニング器
116A クリーニングブレード
116B クリーニングローラ
116C トナー排出用搬送スクリュー
117 除電器
P 記録媒体
T 現像剤(トナー)
U 第1凹凸部
V 第2凹凸部
W 第3凹凸部
Claims (12)
- 外周面と端面との間に面取り面を有する円筒状基体と、
前記外周面および前記面取り面上に位置している表面層と、を備え、
前記外周面は、第1凹凸部を有し、
前記面取り面は、第2凹凸部と、前記第2凹凸部の表面に位置する第3凹凸部とを有し、
前記第2凹凸部の表面粗さSaは、前記第3凹凸部の表面粗さSaよりも大きい、電子写真感光体。 - 前記第1凹凸部の表面粗さは、Saが50nm以上140nm以下であり、
前記第2凹凸部の表面粗さは、Saが180nm以上1000nm以下であり、
前記第3凹凸部の表面粗さは、Saが90nm以上140nm以下である、請求項1に記載の電子写真感光体。 - 外周面と端面との間に、前記外周面に連続する外側面取り面と、前記外側面取り面と前記端面との間に位置する内側面取り面と、を有する円筒状基体と、
前記外周面、前記外側面取り面および前記内側面取り面上に位置している表面層と、を備え、
前記外側面取り面の表面粗さSaが、前記内側面取り面の表面粗さSaより大きい、電子写真感光体。 - 前記内側面取り面は、前記外側面取り面に連続して位置している、請求項3に記載の電子写真感光体。
- 前記外側面取り面の表面粗さは、Saが90nm以上140nm以下であり、
前記内側面取り面の表面粗さは、Saが10nm以上80nm以下である、請求項3または4に記載の電子写真感光体。 - 外周面と端面との間に、前記外周面に連続する外側面取り面と、前記外側面取り面と前記端面との間に位置する内側面取り面とを有する円筒状基体と、
前記外周面、前記外側面取り面および前記内側面取り面上に位置している表面層と、を備え、
前記外側面取り面の表面粗さSaが、前記内側面取り面の表面粗さSaより大きく、
前記外側面取り面の表面粗さSaが、前記外周面の表面粗さSaより大きく、かつ、
前記内側面取り面の表面粗さSaが、前記外周面の表面粗さSaより大きい、電子写真感光体。 - 前記内側面取り面は、前記外側面取り面に連続して位置している、請求項6に記載の電子写真感光体。
- 前記外周面の表面粗さは、Saが1nm以上140nm以下であり、
前記外側面取り面の表面粗さは、Saが180nm以上1000nm以下であり、
前記内側面取り面の表面粗さは、Saが180nm以上1000nm以下である、請求項6または7に記載の電子写真感光体。 - 前記表面層は、電荷注入阻止層,光導電層,および表面保護層を有する、請求項1〜8のいずれか1つに記載の電子写真感光体。
- 前記表面層は、アモルファスシリコン(a−Si)を含む、請求項1〜9のいずれか1つに記載の電子写真感光体。
- 前記表面層は、有機材料を含む、請求項1〜9のいずれか1つに記載の電子写真感光体。
- 請求項1〜11のいずれか1つに記載の電子写真感光体と、
前記電子写真感光体と接触可能な周辺部材と、を備える画像形成装置。
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