Canon Kabushiki Kaisha

Tdk Corporation

Kazunori Noguchi

Harunobu Ogaki

Atsushi Okuda

Takashi Anezaki

Nobuhiro Nakamura

Yuka Ishiduka

Akihiro Maruyama

Shio Murai

Kazuhisa Shida

Takeshi Murakami

Yuki Yamamoto

Atsushi Fujii

Kazumichi Sugiyama

Mari Miyauchi

Tatsuya Yamaai

Kazuko Sakuma

Takashi Kenmoku

Akira Sato

Michiyo Sekiya

Daisuke Miura

Yuzo Seino

Shuhei Iwasaki

Akira Sakakibara

Takako Hibi

Takako Murosawa

Kunihiko Sekido

Yota Ito

Yuya Tomomizu

Koji Takahashi

Daisuke Tanaka

Tsutomu Nishida

Kenta Kamikura

Kenichi Kaku

Kaname Watariguchi

Atsushi Ochi

Takumi Furukawa

Tatsuya Ikezue

Haruyuki Tsuji

Hideharu Shimozawa

Nobumichi Miki

Nobuo Kosaka

Yuji Kawaguchi

Masataka Kawahara

Shuntaro Watanabe

Daisuke Yoshiba

Kazunari Hagiwara

Hiroyuki Tomono

Hiroyuki Watanabe

Hiroki Uematsu

Jumpei Kuno

Kohei Makisumi

Hirotoshi Uesugi

Kazuko Araki

Takahisa Taniguchi

The present disclosure provides a photoelectric conversion element including a first electrode, a second electrode, a photoelectric conversion layerbetween the first electrodeand the second electrode, and a reflection layerbetween one of the first electrodeand the second electrodeand the photoelectric conversion layer. The wavelength at which the reflectance of the reflection layeris maximum in the visible region is within the range of wavelengths in which the optical absorption coefficient of the photoelectric conversion layeris ⅕ or more of the maximum optical absorption coefficient in the visible region.

Photoelectric conversion element and photoelectric conversion device including the photoelectric conversion element

An image forming apparatus including an electrophotographic photosensitive member having a support and a photosensitive layer, a charging unit that forms an electrostatic image on an outer surface of the electrophotographic photosensitive member, a developing unit that supplies a toner to the electrostatic image to form a toner image, and a transfer unit that transfers the toner image on a transfer medium. In this image forming apparatus, the surface layer of the electrophotographic photosensitive member contains a binder resin (A) having a specific structure and silica particles, and the wax contains a specific monoester compound.

Image forming apparatus and image forming method

Provided is a process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge including: a developing unit including a toner; and an electrophotographic photosensitive member, wherein the toner includes a toner particle, the toner particle has a surface containing a polyvalent acid metal salt particle, and a surface layer of the electrophotographic photosensitive member contains at least one metal oxide particle among an aluminum oxide particle, a silicon dioxide particle, and a tin oxide particle.

Process cartridge and electrophotographic apparatus

An electrophotographic photosensitive member, which is suppressed in occurrence of fogging and is excellent in abrasion resistance. In the electrophotographic photosensitive member, an outermost surface layer of the electrophotographic photosensitive member comprises a polymerized product of a composition comprising at least a polyrotaxane and a monomer having a polymerizable reactive group, and a chain molecule of the polyrotaxane has two blocking groups at both terminals thereof, and a (meth)acryloyloxy group of a cyclic molecule of the polyrotaxane forms a bond.

Electrophotographic photosensitive member, process cartridge, and electrophotographic image forming apparatus

An electrophotographic photosensitive member having a support and a photosensitive layer on the support, wherein the electrophotographic photosensitive member comprises a surface layer comprising a polymerization product of a composition containing polyrotaxane and a charge transporting substance, and the polymerization product including a bond between the polyrotaxane and the charge transporting substance.

Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus

The present disclosure provides a process cartridge and an electrophotographic apparatus in which fogging is reduced so as to reduce an amount of toner consumed. A process cartridge configured to be detachably attachable to a main body of an electrophotographic apparatus includes a developing unit containing a toner, and an electrophotographic photosensitive member, wherein the toner is a toner that has a toner particle, and has a metal salt of a polyvalent acid at least on a part of a surface of the toner particle; wherein the metal salt of the polyvalent acid includes at least one kind of metal element selected from metal elements belonging to from Group 3 to Group 13, and a surface layer of the electrophotographic photosensitive member contains an acrylic resin or a methacrylic resin.

Provided are a process cartridge and an electrophotographic apparatus each of which is reduced in fogging for reducing a toner consumption. Specifically, provided is a process cartridge, which is removably mounted onto a main body of an electrophotographic apparatus, the process cartridge including: a developing unit containing a toner; and an electrophotographic photosensitive member, wherein the toner is a toner including a toner particle, and has a polyvalent acid metal salt on at least part of a surface of the toner particle, wherein the polyvalent acid metal salt includes at least one kind of metal element selected from metal elements belonging to from Group 3 to Group 13, and wherein a surface layer of the electrophotographic photosensitive member contains a resin including a siloxane segment.

Provided is a process cartridge having a charging member and an electrophotographic photosensitive member to be charged by being in contact with the charging member, wherein the electrophotographic photosensitive member has a support and a photosensitive layer in this order, and a surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mmor less.

Provided are a process cartridge and an electrophotographic apparatus each suppressed in fluctuation in charging potential at the time of its long-term use. The process cartridge includes: an electrophotographic photosensitive member having a surface layer containing a resin and a charge-transporting substance; and a charging member configured to charge the electrophotographic photosensitive member, wherein an average of Martens hardnesses of the surface layer of the electrophotographic photosensitive member measured at a pushing force of 7 mN is 245 N/mmor more, and wherein in a core defined by three-dimensional surface texture standards (ISO 25178-2:2012) of the surface of the charging member, an average of Martens hardnesses measured at a pushing force of 0.04 mN is 2 N/mmor more and 20 N/mmor less, and an average of adhesivenesses measured with a scanning probe microscope in a field of view of 2-micrometer square is 70 mV or less.

A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a cleaning member arranged in contact with the electrophotographic photosensitive member, wherein an elastic deformation modulus of a surface layer of the electrophotographic photosensitive member is 35% or larger, and the cleaning member is formed of a urethane foam, wherein a density of the urethane foam is 200 to 500 kg/cm, and a 25% compressive load of the urethane foam is 0.3 MPa or smaller.

Process cartridge and electrophotographic image forming apparatus

An electrophotographic photosensitive member includes a surface layer containing a charge transporting material and a polyester resin having a specific structure.

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

An electrophotographic photoreceptor abuts against a charging member and/or a developer carrying member with an abutting member therebetween, has a first portion and a second portion abutting against the abutting member along the longitudinal direction of the photoreceptor, and includes a support, a charge generating layer containing a charge generation material, and a surface layer in this order. The first portion includes an undercoat layer containing a polymer of a composition containing an electron transport material and a crosslinking agent and being contiguous with the surface of the charge generating layer facing the support. The second portion includes (i) an intermediate layer being disposed between and being contiguous with the support and the charge generating layer and/or (ii) an intermediate layer being disposed between and being contiguous with the charge generating layer and the surface layer, wherein the intermediate layers each have a Martens hardness of 500 N/mmor less.

Electrophotographic photoreceptor, process cartridge, and electrophotographic apparatus

An electrophotographic photosensitive member includes a surface layer containing a charge transporting material and a specific polyester resin having a structure including a specific branched chain.

An electrophotographic photosensitive member including a surface layer containing a specific polyester resin is provided. The polyester resin contains specific structures.

An electrophotographic photosensitive member including a surface layer containing a charge generating material and a polyester resin is provided. The polyester resin contains a structure having a 12- or higher-membered cycloalkylene group.

Growing community of inventors

Suntou-gun, Japan

Kazunori Noguchi