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1.发明申请公开(公告)号：US20230059773A1
公开(公告)日：2023-02-23
申请号：US17814655
申请日：2022-07-25
IPC分类号： G03G5/047 , G03G15/054 , G03G5/05 , G03G15/02 , G03G5/06
摘要： An electrophotographic photosensitive member includes: a support; an undercoat layer; a charge generation layer; and a charge transport layer, wherein the undercoat layer contains a polyamide resin and a titanium oxide fine particle, and on the surface of the undercoat layer, an arithmetic mean roughness Ra and an average length Rsm of a roughness curve element both according to JIS B0601:2001 satisfy Ra≤50 nm and 0.1≤Ra/Rsm≤0.5; and the charge generation layer contains a hydroxygallium phthalocyanine pigment, wherein the hydroxygallium phthalocyanine pigment includes crystal particles having a crystal form exhibiting peaks at 7.4°±0.3° and 28.2°±0.3° at Bragg angles 2θ in a spectrum of X-ray diffraction using a CuKα, ray; and in a size distribution of the crystal particles, which is measured using small-angle X-ray scattering, a peak exists in a range of 20 to 50 nm, and the peak has a half-value width of 50 nm or smaller.
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2.发明申请公开(公告)号：US20200264526A1
公开(公告)日：2020-08-20
申请号：US16785721
申请日：2020-02-10
发明人： Hideharu Shimozawa , Tsutomu Nishida , Atsushi Okuda , Yuka Ishiduka , Kenichi Kaku , Nobuhiro Nakamura , Hiroyuki Watanabe
摘要： The present disclosure provides an electrophotographic photosensitive member that suppresses electric potential fluctuations in repeated use. The electrophotographic photosensitive member includes a support, a photosensitive layer and a protective layer, in this order, wherein the photosensitive layer includes a compound having a structure represented by formula (1), and the protective layer includes a resin having a structure represented by formula (2) and a structure represented by formula (3).
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3.发明授权公开(公告)号：US10558133B2
公开(公告)日：2020-02-11
申请号：US16423429
申请日：2019-05-28
发明人： Nobuhiro Nakamura , Tsutomu Nishida , Atsushi Okuda , Yuka Ishiduka , Hiroyuki Watanabe , Hideharu Shimozawa , Kenichi Kaku , Koichi Nakata , Haruki Mori
摘要： An electrophotographic photosensitive member suppressing potential variation due to repeated use is provided. The electrophotographic photosensitive member is an electrophotographic photosensitive member including a support, a photosensitive layer and a protective layer in this order, wherein the protective layer contains: a resin including a structure represented by a general formula (1) and a structure represented by a general formula (2); and a compound represented by a general formula (3), the molar ratio of the proportion of the structure represented by the general formula (2) to the proportion of the structure represented by the general formula (1) in the resin is 0.0002 to 0.1000 in a molar ratio, and the molar ratio of the content of the compound represented by the general formula (3) to the content of the structure represented by the general formula (1) in the resin in the protective layer is 0.0002 to 0.1000 in a molar ratio.
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公开(公告)号：US10539892B2
公开(公告)日：2020-01-21
申请号：US16423393
申请日：2019-05-28
发明人： Tsutomu Nishida , Yuka Ishiduka , Kenichi Kaku , Nobuhiro Nakamura , Hiroyuki Watanabe , Hideharu Shimozawa , Atsushi Okuda
摘要： Provided is an electrophotographic photosensitive member that is reduced in exposure memory and is excellent in electrical characteristics and durability. The electrophotographic photosensitive member includes in this order: a support; a photosensitive layer; and a protective layer, wherein the protective layer contains a resin having a structure represented by the following general formula (1) and a structure represented by the following general formula (2).
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5.发明授权公开(公告)号：US10303085B2
公开(公告)日：2019-05-28
申请号：US15992605
申请日：2018-05-30
发明人： Taichi Sato , Jumpei Kuno , Kenichi Kaku , Takashi Anezaki , Atsushi Fujii
摘要： Provided is an electrophotographic photosensitive member capable of achieving both high leak resistance and reduction in variations in dark part potential and bright part potential due to repeated use even when CB is used for an electrically conductive layer. An electrophotographic photosensitive member including: a support, an electrically conductive layer, and a photosensitive layer, sequentially, wherein the electrically conductive layer contains a binder resin and carbon black, a number average primary particle diameter of the carbon black is 200 nm or more and 500 nm or less, an average inter-particle distance of the carbon black is 200 nm or more and 600 nm or less, a coefficient of variation of an inter-particle distance is 1.2 or less, and SF-1 of the carbon black is 150 or less.
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6.发明授权公开(公告)号：US10152002B2
公开(公告)日：2018-12-11
申请号：US15904055
申请日：2018-02-23
发明人： Takashi Anezaki , Kenichi Kaku , Taichi Sato , Jumpei Kuno , Atsushi Fujii
摘要： An electrophotographic photosensitive member includes a support member, an electroconductive layer, and photosensitive layer in this order. The electroconductive layer contains a binder and particles. The particles have a core containing titanium oxide, and a coating layer coating the core and containing titanium oxide doped with niobium or tantalum.
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7.发明申请ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS 审中-公开电子照相感光元件，工艺盒和电子照相设备公开(公告)号：US20150277247A1
公开(公告)日：2015-10-01
申请号：US14736193
申请日：2015-06-10
发明人： Michiyo Sekiya , Kunihiko Sekido , Atsushi Okuda , Hiroyuki Tomono , Nobuhiro Nakamura , Yota Ito , Kenichi Kaku , Yuka Ishiduka
IPC分类号： G03G15/02
CPC分类号： G03G5/047 , G03G5/0542 , G03G5/0546 , G03G5/055 , G03G5/0575 , G03G5/0589 , G03G5/0592 , G03G5/0605 , G03G5/0607 , G03G5/0648 , G03G5/065 , G03G5/0651 , G03G5/0657 , G03G5/075 , G03G5/076 , G03G5/142 , G03G15/00 , G03G15/751
摘要： An electrophotographic photosensitive member has a laminated body and a hole transporting layer formed on the laminated body, wherein the laminated body has a support, an electron transporting layer and a charge generating layer in this order, and satisfies the following expressions (2) and (4): |V12−V11|≦0.35 (2) 0.10≦|(Vd2−V13)/Vd2|0.20 (4).
摘要翻译： 电子照相感光构件具有层叠体和形成在层叠体上的空穴传输层，其中层叠体依次具有支撑体，电子传输层和电荷产生层，并且满足以下表达式（2）和（ 4）：| V12-V11 |＆nlE; 0.35（2）0.10＆nlE; |（Vd2-V13）/Vd2|0.20（4）。
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8.发明申请公开(公告)号：US20140342276A1
公开(公告)日：2014-11-20
申请号：US14361965
申请日：2012-11-28
发明人： Mai Murakami , Kenichi Kaku , Wataru Kitamura , Yuka Ishiduka , Ryoichi Tokimitsu , Hideaki Nagasaka , Takeshi Murakami
摘要： An electrophotographic photosensitive member includes an undercoat layer containing a silane coupling agent having a divalent group represented by —NH— and an urethane resin. The modulus of elastic deformation (we/wt) of a surface of the undercoat layer satisfies formula (X), where the modulus of elastic deformation is measured by a universal hardness test.
摘要翻译： 电子照相感光构件包括含有由-NH-表示的二价基团的硅烷偶联剂和聚氨酯树脂的底涂层。 底涂层的表面的弹性变形量（We / wt）满足式（X），通过通用硬度试验测定弹性变形的弹性模量。
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9.发明申请公开(公告)号：US20140004456A1
公开(公告)日：2014-01-02
申请号：US13931215
申请日：2013-06-28
发明人： Atsushi Okuda , Nobuhiro Nakamura , Kunihiko Sekido , Michiyo Sekiya , Yota Ito , Kenichi Kaku , Hiroyuki Tomono , Yuka Ishiduka
CPC分类号： G03G5/142 , G03G5/04 , G03G5/0525 , G03G5/0571 , G03G5/0575 , G03G5/0589 , G03G5/0592 , G03G5/0596 , G03G5/0648 , G03G5/065 , G03G5/0651 , G03G5/0657 , G03G5/076 , G03G15/00 , G03G15/751
摘要： An undercoat layer of an electrophotographic photosensitive member contains a polymerized product of (cured material) a composition that contains a particular crosslinking agent, a particular resin, and a particular charge transporting substance.
摘要翻译： 电子照相感光构件的底涂层含有（固化物）的聚合物，该组合物含有特定的交联剂，特定的树脂和特定的电荷输送物质。
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公开(公告)号：US20230058278A1
公开(公告)日：2023-02-23
申请号：US17815276
申请日：2022-07-27
发明人： Akihiro Maruyama , Kenichi Kaku , Shuhei Iwasaki , Kohei Makisumi , Michiyo Sekiya , Kaname Watariguchi , Hideharu Shimozawa , Tatsuya Yamaai , Takanori Mitani , Satoshi Nishida
摘要： The electrophotographic apparatus includes: an electrophotographic photosensitive member; a charging unit; an image-exposing unit; a charge transfer amount-sensing unit for sensing the amount of charge transferred to the electrophotographic photosensitive member; and an exposed portion potential-controlling unit for controlling the potential of each of the exposed portions of the electrophotographic photosensitive member based on a sensing result, which is obtained by charging the electrophotographic photosensitive member with the charging unit, performing image exposure with the image-exposing unit in at least one light amount weaker than a light amount in which the normalized radius of curvature R of the electrophotographic photosensitive member represented by the following equation (E1), the normalized radius of curvature being obtained by a method of measuring an EV curve, shows a minimum, and in at least two light amounts stronger than the light amount in which the normalized radius of curvature shows the minimum. R = [ 1 + ( dy dx ) 2 ] 3 / 2 ❘ "\[LeftBracketingBar]" d 2 dx 2 ❘ "\[RightBracketingBar]" ( E 1 )
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