公开(公告)号：US20230143174A1

公开(公告)日：2023-05-11

申请号：US18047300

申请日：2022-10-18

申请人： CANON KABUSHIKI KAISHA

发明人： Koichi Nakata ,  Naohiro Takahashi

IPC分类号： G03G5/07 ,  G03G5/047 ,  C08F220/34 ,  C09D133/14 ,  G03G21/18

CPC分类号： G03G5/0732 ,  G03G5/047 ,  C08F220/34 ,  C09D133/14 ,  G03G21/1814

摘要： Provided is an electrophotographic photosensitive member including a support, a charge-generating layer, a first hole-transporting layer, and a second hole-transporting layer, wherein the second hole-transporting layer contains a hole-transportable compound represented by the formula (1) (mass: W1, energy value of the highest occupied molecular orbital: CTM1HOMO), and a hole-transportable compound represented by the formula (2) (mass: W2) and/or a hole-transportable compound represented by the formula (3) (mass: W3) (energy value of the highest occupied molecular orbital: CTM2HOMO), wherein a value calculated from the expression (I) is from 0.05% by mass to 5.0% by mass, and wherein the expression (II) is satisfied: (W2+W3)/(W1+W2+W3)×100 (% by mass)—Expression (I); and 0.05 (eV)≤|CTM2HOMO|-|CTM1HOMO|≤0.30 (eV)—(II).

公开(公告)号：US12032318B2

公开(公告)日：2024-07-09

申请号：US18064490

申请日：2022-12-12

申请人： KONICA MINOLTA, INC.

发明人： Taiki Amemiya ,  Kazutoshi Kobayashi ,  Yukio Hosoya ,  Seijiro Takahashi ,  Tomoko Sakimura ,  Kazukuni Nishimura

IPC分类号： G03G15/00 ,  G03G5/06 ,  G03G5/07 ,  G03G5/147 ,  G03G8/00 ,  G03G21/00

CPC分类号： G03G15/6597 ,  G03G5/06147 ,  G03G5/061473 ,  G03G5/0732 ,  G03G5/14786 ,  G03G5/14791 ,  G03G5/14795 ,  G03G8/00 ,  G03G15/751 ,  G03G21/0011 ,  G03G2215/00518

摘要： An electrophotographic image forming system forms an electrostatic latent image on at least a photoreceptor, develops an image using an electrostatic charge image developing toner, and removes the toner using a cleaning blade. A tip ridge of the cleaning blade is pressed against a surface of the photoreceptor. The system includes a photosensitive layer of the photoreceptor and a surface protecting layer that is provided on a surface of the photosensitive layer. The surface protecting layer includes a polymerizable monomer having at least two polymerizable groups in a molecule and a polymer of a hole transporting compound having a polymerizable group represented by General formula (1). The tip ridge of the cleaning blade has an edge angle that is obtuse and less than 120° and is pressed against the surface of the photoreceptor at an effective contact angle that is in a range of 8 to 20°.