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14 条记录 (耗时 0.026 秒)

    Image bearing member for electrophotography
    2.
    发明授权
    Image bearing member for electrophotography 有权

    公开(公告)号：US10585365B2

    公开(公告)日：2020-03-10

    申请号：US16261800

    申请日：2019-01-30

    申请人： Konica Minolta, Inc.

    发明人： Tomoko Sakimura ,  Hiroki Takao ,  Mayuko Matsusaki ,  Kengo Ikeda

    IPC分类号： G03G5/147 ,  G03G15/16 ,  G03G5/10 ,  G03G5/05

    摘要： An object of the present invention is to provide an image bearing member for electrophotography. The image bearing member has high mechanical properties which include abrasion resistance and scratch resistance, is excellent in toner releasability, and is capable of retaining these features. The present invention provides an image bearing member for electrophotography, which includes a surface layer, the surface layer being composed of a polymerization-cured product of a composition containing a polymerizable monomer and surface-treated metal oxide particles, and the surface-treated metal oxide particles are metal oxide particles surface-treated with a surface treating agent having a silicone side chain.

    Electrophotographic image forming apparatus and electrophotographic image forming method
    5.
    发明授权
    Electrophotographic image forming apparatus and electrophotographic image forming method 有权

    公开(公告)号：US10948866B2

    公开(公告)日：2021-03-16

    申请号：US16590685

    申请日：2019-10-02

    申请人： Konica Minolta, Inc.

    发明人： Kengo Ikeda ,  Hiroki Takao ,  Tomoko Sakimura ,  Mayuko Matsusaki

    IPC分类号： G03G5/05 ,  G03G15/00 ,  G03G21/00 ,  G03G9/097 ,  G03G5/147

    摘要： An electrophotographic image forming apparatus includes: an electrophotographic photoreceptor; a charger that charges a surface of the electrophotographic photoreceptor; an exposer that exposes the charged electrophotographic photoreceptor; a developer that supplies a toner to the electrophotographic photoreceptor on which an electrostatic latent image is formed; a transferer that transfers a toner image formed on the electrophotographic photoreceptor; and a cleaner that removes a residual toner remaining on a surface of the electrophotographic photoreceptor, wherein the electrophotographic photoreceptor includes an outermost layer, a surface of the outermost layer has a projection structure due to a ridge of the inorganic filler, the toner contains toner base particles and metal oxide particles as an external additive externally added to the toner base particles, 70% or more of the toner base particles are covered with the metal oxide particles as the external additive, and following formulas (1) to (3) are satisfied. [ Numerical ⁢ ⁢ formula ⁢ ⁢ 1 ] R 2 ≤ 2 ⁢ 2 ⁢ R 1 ⁢ R 3 - R 1 2 ( 1 ) 0

    Electrophotographic photoreceptor, and electrophotographic image forming method and electrophotographic image forming apparatus using the same
    6.
    发明授权
    Electrophotographic photoreceptor, and electrophotographic image forming method and electrophotographic image forming apparatus using the same 有权

    公开(公告)号：US10663875B2

    公开(公告)日：2020-05-26

    申请号：US16518251

    申请日：2019-07-22

    申请人： Konica Minolta, Inc.

    发明人： Tomoko Sakimura ,  Hiroki Takao ,  Mayuko Matsusaki ,  Kengo Ikeda

    IPC分类号： G03G5/00 ,  G03G5/147 ,  G03G15/00

    摘要： An electrophotographic photoreceptor includes an outermost layer formed of a polymerized cured product of a composition containing a polymerizable monomer and metal oxide particles surface-treated with a surface treatment agent having a silicone chain, wherein a ratio (r/r′) between a number average primary particle diameter (r) of metal oxide particles which are untreated base particles of the metal oxide particles surface-treated with the surface treatment agent having a silicone chain and a sphere equivalent particle diameter (r′) of the untreated base particles calculated from a specific surface area measured by a nitrogen adsorption method is 1.5 or more and 6.0 or less, and a surface treatment amount with the surface treatment agent having a silicone chain per surface area of the untreated base particles is 0.0005 g/m2 or more and 0.0015 g/m2 or less.

    Photoconductor and method for producing the same
    7.
    发明授权
    Photoconductor and method for producing the same 有权

    公开(公告)号：US10197929B2

    公开(公告)日：2019-02-05

    申请号：US15832992

    申请日：2017-12-06

    申请人： Konica Minolta, Inc.

    发明人： Masanori Yumita ,  Toyoko Shibata ,  Tomoko Sakimura

    IPC分类号： G03G5/05 ,  G03G5/06 ,  G03G5/07 ,  G03G5/00 ,  G03G5/147

    摘要： The photoconductor includes a conductive support, a photosensitive layer, and a protective layer. The protective layer is a polymer of a radical-polymerizable composition containing a perfluoropolyether compound including a radical-polymerizable functional group, a radical-polymerizable monomer including a radical-polymerizable functional group, and an inorganic fine particle including a radical-polymerizable functional group. The radical-polymerizable functional group of the perfluoropolyether compound is different from the radical-polymerizable functional group of the radical-polymerizable monomer and identical to the radical-polymerizable functional group of the inorganic fine particle.

    Electrophotographic photoreceptor
    10.
    发明授权
    Electrophotographic photoreceptor 有权

    公开(公告)号：US11237495B2

    公开(公告)日：2022-02-01

    申请号：US16591777

    申请日：2019-10-03

    申请人： Konica Minolta, Inc.

    发明人： Mayuko Matsusaki ,  Tomoko Sakimura ,  Hiroki Takao ,  Kengo Ikeda

    IPC分类号： G03G5/147 ,  G03G5/047

    摘要： There is provided an electrophotographic photoreceptor obtained by sequentially laminating at least a photosensitive layer and an outermost layer on a conductive support, wherein the outermost layer contains a polymerized and cured product of a composition containing a polymerizable monomer and a filler, and the filler includes a conductive first filler surface-treated with a surface treatment agent having a silicone chain in a side chain, and a second filler having a relative dielectric constant which is lower than that of the first filler and 5 or less.