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    ELECTROPHOTOGRAPHIC MEMBER, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS
    1.
    发明公开
    ELECTROPHOTOGRAPHIC MEMBER, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：EP4283406A1

    公开(公告)日：2023-11-29

    申请号：EP23174808.8

    申请日：2023-05-23

    申请人： CANON KABUSHIKI KAISHA

    发明人： KOYANAGI, Takashi ,  SATO, Takuho

    IPC分类号： G03G15/08

    摘要： An electrophotographic member (1) including an electro-conductive substrate (2), an elastic layer (3), and a surface layer (4), the surface layer containing a fine particle and a binder resin, and having a thickness of less than 1.0 µm, the fine particles having an average particle diameter of from 0.1 µm to 0.9 µm, the fine particles having a volume occupancy of 60 vol% to 99 vol% with respect to 100 vol% of the binder resin in the surface layer, the elastic modulus E1 of the fine particle being 1,000 MPa or more, and the elastic modulus E2 of the binder resin being 2 MPa to 200 MPa, and MD-1 hardness H1 of the surface layer being 50° to 100°, and a difference (H1-H2) between the H1 and MD-1 hardness H2 of the elastic layer being 5° or more.

    DEVELOPING DEVICE, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS
    3.
    发明公开
    DEVELOPING DEVICE, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：EP4057074A1

    公开(公告)日：2022-09-14

    申请号：EP22160154.5

    申请日：2022-03-04

    申请人： CANON KABUSHIKI KAISHA

    发明人： KOYANAGI, Takashi ,  TAKENO, Kineo ,  SATO, Takuho

    IPC分类号： G03G15/08 ,  G03G9/087

    摘要： A developing device including: a developer; and a developing member configured to carry the developer on a surface thereof, the developing roller including an electro-conductive substrate and a single-layer elastic layer serving as a surface layer on the substrate, the surface layer comprising a binder resin, and the binder resin contains a crosslinked urethane resin and a crosslinked acrylic resin, the crosslinked urethane resin and the crosslinked acrylic resin form an interpenetrating polymer network structure in a first region from an outer surface of the surface layer to a position at a depth of 0.1 µm from the outer surface, wherein the developer contains developer particles each containing at least a binder resin and a magnetic substance.

    DEVELOPMENT MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHY DEVICE
    6.
    发明公开
    DEVELOPMENT MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHY DEVICE 有权
    开发部件，处理筒和电子照相设备

    公开(公告)号：EP2869130A1

    公开(公告)日：2015-05-06

    申请号：EP13809495.8

    申请日：2013-06-25

    申请人： Canon Kabushiki Kaisha

    发明人： YAMADA, Masaki ,  SAKURAI, Yuji ,  ISHII, Toru ,  KOYANAGI, Takashi

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0806 ,  G03G15/0818 ,  Y10T29/49544

    摘要： A high quality developing member that is excellent in deformation recovery property under a high temperature and that also satisfies filming resistance under a low temperature is provided. The developing member of the present invention includes a mandrel, an elastic layer formed on the outer periphery surface of the mandrel, and a surface layer covering the outer periphery surface of the elastic layer, wherein the surface layer contains a first resin and a second resin, the first resin has a particular structure between adjacent two urethane linkages, and the second resin is a resin having a particular structure and having a glass transition point Tg of 20°C or higher and 120°C or lower.

    摘要翻译： 本发明提供一种高温下的变形恢复性优异，同时满足低温下的成膜性的高品质的显影部件。 本发明的显影构件包括心轴，在心轴的外周表面上形成的弹性层以及覆盖弹性层的外周表面的表面层，其中表面层包含第一树脂和第二树脂 第一树脂在相邻的两个氨基甲酸乙酯键之间具有特定的结构，第二树脂是具有特定结构并且具有20℃以上且120℃以下的玻璃化转变点Tg的树脂。

    DEVELOPMENT MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE-FORMING DEVICE
    9.
    发明公开
    DEVELOPMENT MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE-FORMING DEVICE 有权
    ENTWICKLUNGSELEMENT，PROZESSKARTUSCHE UND ELEKTROFOTOGRAFISCHE BILDERZEUGUNGSVORRICHTUNG

    公开(公告)号：EP2816417A1

    公开(公告)日：2014-12-24

    申请号：EP12868465.1

    申请日：2012-10-17

    申请人： Canon Kabushiki Kaisha

    发明人： NAKAMURA, Minoru ,  URUSHIHARA, Shohei ,  KOYANAGI, Takashi ,  KAWAMURA, Kunimasa ,  YAMADA, Masaki

    IPC分类号： G03G15/08 ,  C08L83/05

    CPC分类号： G03G15/0865 ,  G03G15/0818

    摘要： Provided is a developing member capable of suppressing a variation in resistance even when exposed to a high-temperature, high-humidity environment for a long time period. The developing member comprises: a mandrel; an electro-conductive elastic layer provided on a periphery of the mandrel; and a surface layer provided on a surface of the elastic layer, wherein: the elastic layer contains a dimethyl silicone rubber and carbon black; and an amount α of a hydrogen atom bound to a silicon atom of the dimethyl silicone rubber, and an amount β of a hydrogen atom of methyl groups bound to a silicon atom of the dimethyl silicone rubber, satisfy a relationship of 2.5×10 -5 ≤α/β≤1.0×10 -4

    摘要翻译： 即使长期暴露在高温高湿环境下，也能够抑制电阻变化的显影部件。 显影构件包括：心轴; 设置在心轴的周边上的导电弹性层; 以及设置在所述弹性层的表面上的表层，其中：所述弹性层包含二甲基硅橡胶和炭黑; 和与二甲基硅橡胶的硅原子结合的氢原子的量的±，和与二甲基硅橡胶的硅原子结合的甲基的氢原子的量的2满足2.5×10 -5 ‰¤±/²‰¤1.0×10 -4

    DEVELOPER CARRIER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS
    10.
    发明公开
    DEVELOPER CARRIER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS 审中-公开

    公开(公告)号：EP3683629A1

    公开(公告)日：2020-07-22

    申请号：EP18855068.5

    申请日：2018-09-07

    申请人： Canon Kabushiki Kaisha

    发明人： ITO, Minoru ,  YAMAGUCHI, Sosuke ,  KOYANAGI, Takashi ,  MIYAZAWA, Takahiro ,  URUSHIHARA, Shohei ,  NAKAMURA, Kentarou

    IPC分类号： G03G15/08 ,  F16C13/00 ,  G03G21/18 ,  C08G18/10

    摘要： Provided is a developer carrier which is capable of stably forming high-quality images even in cases where a recording paper containing much talc is used. This developer carrier comprises a conductive substrate and a surface layer that is arranged on the substrate and contains a resin. The surface layer has a thickness of from 1.0 µm to 100.0 µm (inclusive); the Martens hardness at an indentation depth of 0.1 µm as determined by pressing a Vickers indenter into the surface layer from the outer surface in the thickness direction is from 50.0 N/mm2 to 100.0 N/mm2 (inclusive); the Asker C hardness as determined from the outer surface of the surface layer is from 75° to 90° (inclusive); and the value of the work function of the outer surface of the surface layer is from 5.6 eV to 6.0 eV (inclusive).