公开(公告)号：US09213229B2

公开(公告)日：2015-12-15

申请号：US14169031

申请日：2014-01-30

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Yuko Iwashita ,  Yukimasa Watanabe ,  Junichiro Otsubo ,  Kazuaki Ezure ,  Kazutaka Sugimoto

IPC: G03G5/08 ,  G03C1/73 ,  G03C1/52 ,  G03G5/047 ,  G03G5/05

CPC classification number: G03C1/73 ,  G03C1/52 ,  G03G5/047 ,  G03G5/0542

Abstract: A positively chargeable electrophotographic photosensitive member has a photosensitive layer. The photosensitive layer at least includes the following layers layered in the stated order: (I) a charge transport layer at least containing a hole transport material and a binder resin; and (II) a charge generating-and-transporting layer at least containing a charge generating material, an electron transport material, a hole transport material, and a binder resin all within this layer. The binder resin contained in the charge transport layer is different from the binder resin contained in the charge generating-and-transporting layer, and either of the binder resins contains a polyvinyl acetal resin.

Abstract translation: 带正电的电子照相感光构件具有感光层。 感光层至少包括以下顺序层叠的以下层：（I）至少含有空穴传输材料和粘合剂树脂的电荷传输层; 和（II）至少含有电荷产生材料，电子传输材料，空穴传输材料和粘合剂树脂的电荷产生和传输层。 包含在电荷输送层中的粘合剂树脂与电荷产生 - 输送层中所含的粘合剂树脂不同，并且任一种粘合剂树脂含有聚乙烯醇缩醛树脂。

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.