公开(公告)号：US20240337957A1

公开(公告)日：2024-10-10

申请号：US18292676

申请日：2022-06-24

Applicant: KYOCERA Document Solutions Inc.

Inventor： Junichiro OTSUBO ,  Katsuya TAKANO ,  Kazuaki EZURE

IPC: G03G5/05 ,  C08G63/193 ,  C08G63/199 ,  G03G5/06

CPC classification number: G03G5/056 ,  C08G63/193 ,  C08G63/199 ,  G03G5/06142 ,  G03G5/06144 ,  G03G2215/00957 ,  G03G2215/00962 ,  G03G2221/183

Abstract: An electrophotographic photosensitive member includes at least one photosensitive layer on which a first photosensitive layer disposed on an outermost side thereof. The first photosensitive layer contains a charge generating material, a binder resin including a polyarylate resin with repeating units (1), (2), (3), and (4), an electron transport material, and a hole transport material.




The electron transport material includes a compound represented by formula (10), (11), or (12). The hole transport material includes compounds represented by formulas (21) and (22):




A percentage content of a number of repeats of the repeating unit (3) to the total number of repeats of the repeating units (1) and (3) is greater than 0% and less than 50%. A percentage content of a number of repeats of the repeating unit (4) to the total number of repeats of the repeating units (2) and (4) is at least 35% and less than 70%.

公开(公告)号：US20170068178A1

公开(公告)日：2017-03-09

申请号：US15254012

申请日：2016-09-01

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun AZUMA ,  Kensuke OKAWA ,  Junichiro OTSUBO ,  Akihiko OGATA

IPC: G03G5/05 ,  G03G5/06 ,  G03G5/047

CPC classification number: G03G5/0546 ,  G03G5/047 ,  G03G5/0507 ,  G03G5/0614 ,  G03G5/0672

Abstract: A multi-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer. The charge generating layer contains a charge generating material. The charge transport layer contains a charge transport material, a binder resin, and silica particles. The charge transport layer is a monolayer. The charge transport layer is disposed as an outermost surface layer of the multi-layer electrophotographic photosensitive member. The silica particles have a content of at least 0.5 parts by mass and no greater than 15 parts by mass relative to 100 parts by mass of the binder resin. The binder resin includes a polyarylate resin. The polyarylate resin has a repeating unit represented by general formula (I) shown below. In general formula (I), R1-R3 and Y are defined as those described in the specification.

公开(公告)号：US20140212802A1

公开(公告)日：2014-07-31

申请号：US14168959

申请日：2014-01-30

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Junichiro OTSUBO ,  Jun AZUMA ,  Takayuki INOUE

IPC: G03G15/00 ,  B05D5/12

CPC classification number: G03G5/0564 ,  G03G5/047 ,  G03G5/0517 ,  G03G5/0525

Abstract: A multi-layered electrophotographic photosensitive member includes a multi-layered photosensitive layer. In the multi-layered photosensitive layer, a charge generating layer that contains a charge generating material and a charge transport layer that contains a charge transport material and a binder resin are layered sequentially. The binder resin includes a polycarbonate resin represented by a formula (1).

Abstract translation: 多层电子照相感光构件包括多层感光层。 在多层感光层中，依次层叠包含电荷产生材料的电荷产生层和包含电荷输送材料和粘合剂树脂的电荷输送层。 粘合剂树脂包括由式（1）表示的聚碳酸酯树脂。

公开(公告)号：US20170068177A1

公开(公告)日：2017-03-09

申请号：US15248540

申请日：2016-08-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Junichiro OTSUBO ,  Yasuhiro OISHI

IPC: G03G15/00

CPC classification number: G03G5/0607 ,  G03G5/04 ,  G03G5/0609 ,  G03G5/0631 ,  G03G5/0696 ,  G03G5/102 ,  G03G5/144 ,  G03G15/75 ,  G03G2215/0129 ,  G03G2215/0148

Abstract: A single-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The conductive substrate contains aluminum or an aluminum alloy. A surface of the conductive substrate has an aluminum oxide film or an aluminum alloy oxide film. The photosensitive layer is disposed directly on the conductive substrate. The photosensitive layer contains an electron transport material. The electron transport material has a reduction potential of at least −0.88 V and no greater than −0.66 V versus a reference electrode (Ag/Ag+). The single-layer electrophotographic photosensitive member has a leakage onset voltage of at least 5.0 kV in a high temperature and humidity environment at a temperature of 30° C. and a relative humidity of 80%. The leakage onset voltage is a voltage applied to the single-layer electrophotographic photosensitive member at which current leakage starts.

Abstract translation: 单层电子照相感光构件包括导电基底和感光层。 导电性基材含有铝或铝合金。 导电性基板的表面具有氧化铝膜或铝合金氧化膜。 感光层直接设置在导电性基板上。 感光层含有电子传输材料。 相对于参考电极（Ag / Ag +），电子传输材料具有至少-0.88V且不大于-0.66V的还原电位。 单层电子照相感光构件在温度30℃，相对湿度80％的高温高湿环境下的起爆电压为5.0kV以上。 泄漏开始电压是施加到电流泄漏开始的单层电子照相感光构件的电压。

公开(公告)号：US20230097281A1

公开(公告)日：2023-03-30

申请号：US17815537

申请日：2022-07-27

Applicant: KYOCERA Document Solutions Inc.

Inventor： Junichiro OTSUBO ,  Kazunari HAMASAKI ,  Katsuya TAKANO ,  Kazuaki EZURE

IPC: G03G5/05 ,  G03G15/00

Abstract: An electrophotographic photosensitive member includes a conductive substrate and an at-least-one-layer photosensitive layer including a specific photosensitive layer. The specific photosensitive layer contains a charge generating material, a binder resin, an electron transport material, and a hole transport material. The binder resin includes a polyarylate resin. The polyarylate resin includes repeating units (1), (2), (3), and (4). A percentage of the number of repeats of the repeating unit (3) relative to a total number of repeats of the repeating units (1) and (3) is greater than 0% and less than 50%. A percentage of the number of repeats of the repeating unit (4) relative to a total number of repeats of the repeating units (2) and (4) is at least 35% and less than 70%. The electron transport material includes a compound represented by formula (11), (12), (13), (14), (15), (16), or (17):

公开(公告)号：US20140212803A1

公开(公告)日：2014-07-31

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: G03G15/00

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。