公开(公告)号：US11204561B2

公开(公告)日：2021-12-21

申请号：US16866862

申请日：2020-05-05

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi Shimizu ,  Kazuaki Ezure ,  Hayase Yamamoto

IPC: G03G5/05 ,  G03G5/06 ,  G03G15/00 ,  G03G21/18

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a binder resin, a hole transport material, and an electron transport material. The binder resin includes a polyester resin and a polycarbonate resin. The polyester resin includes a first repeating unit represented by general formula (1) shown below and a second repeating unit represented by general formula (2) shown below. The polycarbonate resin includes a third repeating unit represented by general formula (3) shown below and a fourth repeating unit represented by general formula (24) shown below. A content percentage of the polyester resin in the photosensitive layer is at least 0.3% by mass and no greater than 7.0% by mass.

公开(公告)号：US10996575B2

公开(公告)日：2021-05-04

申请号：US16740196

申请日：2020-01-10

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi Shimizu ,  Kazuaki Ezure ,  Hayase Yamamoto ,  Jun Azuma

IPC: G03G5/00 ,  G03G5/06 ,  G03G5/05 ,  G03G15/00 ,  G03G21/18 ,  G03G5/047

Abstract: A photosensitive layer included in an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound (1). The binder resin includes a polyarylate resin having at least one repeating unit (10) and at least one repeating unit (11). Alternatively, the binder resin includes a polycarbonate resin having a repeating unit (20) and a repeating unit (21). The general formulas (1), (10), (11), (20), and (21) are as follows

公开(公告)号：US11243481B2

公开(公告)日：2022-02-08

申请号：US16866116

申请日：2020-05-04

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazuaki Ezure ,  Tomofumi Shimizu ,  Hayase Yamamoto

IPC: G03G5/05 ,  G03G5/06 ,  G03G15/00 ,  G03G21/18

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a binder resin, a hole transport material, and an electron transport material. The binder resin includes a polyester resin. The polyester resin includes a first repeating unit represented by general formula (1) shown below and a second repeating unit represented by general formula (2) shown below. A content percentage of the polyester resin in the photosensitive layer is at least 0.3% by mass and no greater than 7.0% by mass.