公开(公告)号：US09939744B2

公开(公告)日：2018-04-10

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: G03G5/06 ,  G03G5/05 ,  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：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：US10007199B2

公开(公告)日：2018-06-26

申请号：US15248540

申请日：2016-08-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi Shimizu ,  Junichiro Otsubo ,  Yasuhiro Oishi

IPC: G03G5/06 ,  G03G5/10 ,  G03G5/04 ,  G03G15/00 ,  G03G5/14

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.

公开(公告)号：US09158264B2

公开(公告)日：2015-10-13

申请号：US14068182

申请日：2013-10-31

Applicant: Kyocera Document Solutions Inc.

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

IPC: G03G15/00 ,  G03G5/047 ,  G03G5/06

CPC classification number: G03G15/75 ,  G03G5/047 ,  G03G5/0675 ,  G03G5/0696 ,  G03G5/0698

Abstract: A single-layer-type electrophotographic photosensitive member includes a layer disposed on an electrically conductive substrate, the layer including at least a charge-generating material, an electron transport material, a hole transport material, and a binder resin within the same layer. The charge-generating material contains a phthalocyanine pigment and N-type pigments including at least a perylene-based pigment and an azo-based pigment, and the total amount of the N-type pigments is 0.03 to 10 parts by mass relative to 1 part by mass of the phthalocyanine pigment.

Abstract translation: 单层型电子照相感光构件包括设置在导电基板上的层，该层至少包括在同一层内的电荷产生材料，电子传输材料，空穴传输材料和粘合剂树脂。 电荷产生材料含有酞菁颜料和至少包含苝基颜料和偶氮类颜料的N型颜料，并且N型颜料的总量相对于1份为0.03〜10质量份 的酞菁颜料。

公开(公告)号：US20140120464A1

公开(公告)日：2014-05-01

申请号：US14068182

申请日：2013-10-31

Applicant: Kyocera Document Solutions Inc.

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

IPC: G03G15/00

CPC classification number: G03G15/75 ,  G03G5/047 ,  G03G5/0675 ,  G03G5/0696 ,  G03G5/0698

Abstract: A single-layer-type electrophotographic photosensitive member includes a layer disposed on an electrically conductive substrate, the layer including at least a charge-generating material, an electron transport material, a hole transport material, and a binder resin within the same layer. The charge-generating material contains a phthalocyanine pigment and N-type pigments including at least a perylene-based pigment and an azo-based pigment, and the total amount of the N-type pigments is 0.03 to 10 parts by mass relative to 1 part by mass of the phthalocyanine pigment.

Abstract translation: 单层型电子照相感光构件包括设置在导电基板上的层，该层至少包括在同一层内的电荷产生材料，电子传输材料，空穴传输材料和粘合剂树脂。 电荷产生材料含有酞菁颜料和至少包含苝基颜料和偶氮类颜料的N型颜料，并且N型颜料的总量相对于1份为0.03〜10质量份 的酞菁颜料。