Canon Kabushiki Kaisha

Naoto Kameyama

Koichi Sato

Kenji Onuma

Akira Watanabe

Yasushi Shimizu

Rieko Sakamoto

Kimihiro Yoshimura

Atsushi Hori

Kaoru Okamoto

Hiroshi Tominaga

Jun Ohira

Eileen Takeuchi

Koji Sato

Akeshi Asaka

Koichi Nakamura

Hiroto Sugimoto

Akira Okano

Ryoichi Tokimitsu

Maho Tanaka

Kazuhisa Shirayama

Toshiyuki Yoshida

Takenori Sueoka

Takanori Ueno

Tadanobu Yoshikawa

Megumi Uchino

Ryosuke Tsuruga

Shigeki Takishita

Shigeo Kuroda

Midai Suzuki

Keiji Karube

Kiyonori Soutome

An electrophotographic photosensitive member including a surface layer, wherein the surface layer comprises a fluorine atom-containing resin particle, a binder material, and a polymer having a specific structural unit represented by the following formula (1): In formula (1) Rrepresents a hydrogen atom or a methyl group, Rrepresents a single bond or a methylene group, Rfand Rfeach independently represent a perfluoroalkylene group having 1 to 3 carbon atoms, or a perfluoroalkylidene group having 1 to 3 carbon atoms, and Rfrepresents a perfluoroalkyl group having 1 to 3 carbon atoms.

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus, and method of producing electrophotographic photosensitive member

Provided is an electrophotographic belt including at least: a base layer; and a surface layer containing the following A, B, and C: A: a compound 1 having structures represented by formula (I) and formula (II): in the formula (I), R1 represents a linking group, and R2 represents a hydrogen atom or a methyl group; in the formula (II), R3 represents a hydrogen atom, a methyl group, or a methyl ester group, R4 represents a linking group, R5 represents a methyl group or a tert-butyl group, and 'm' represents an integer of from 25 to 100;B: perfluoropolyether;C: a binder resin.

Electrophotographic belt and electrophotographic image forming apparatus

An electrophotographic photosensitive member that has an electroconductive support and a photosensitive layer on the electroconductive support, and reduces image failures. The surface layer of the electrophotographic photosensitive member includes a cured product of a composition of: a charge transporting compound having a specific polymerizable functional group; a polytetrafluoroethylene particle having a specific primary particle diameter; and a polymer having specific structural units and having weight average molecular weight.

Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

An intermediary transfer belt having surface resistivity &#x3c1;s of 1&#xd7;10&#x3a9;/square or more and volume resistivity &#x3c1;v of 1&#xd7;10&#x3a9;&#xb7;cm or less includes a thermoplastic resin material containing carbon black. The carbon black contained in the thermoplastic resin material has a weight ratio of 22.5-28.5 weight % and include first carbon black and second carbon black. The first carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 50-90 weight % and dibutyl phthalate absorption of 93-127 ml/100 g, and the second carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 10-50 weight % and dibutyl phthalate absorption of 36-79 ml/100 g.

Intermediary transfer belt, manufacturing method of the intermediary transfer belt, and image forming apparatus

An electrophotographic belt having an endless shape and including an endless-shaped base layer, an elastic layer on an outer peripheral surface of the base layer, and a surface layer on the outer peripheral surface of the elastic layer, and the surface layer contains a urethane resin as a binder, polytetrafluoroethylene particles, and a compound having a perfluoropolyether structure and an oxyalkylene structure.

Electrophotographic belt and electrophotographic image forming apparatus using the electrophotographic belt

An electrophotographic belt including: a base layer, an elastic layer formed on the base layer, and a surface layer formed on the elastic layer. The surface layer contains a binder resin and polytetrafluoroethylene particles. A content of the polytetrafluoroethylene particles is 200 parts by mass or more with respect to 100 parts by mass of the binder resin. The polytetrafluoroethylene particles have a number average particle diameter of 200 nm or less.

An intermediate transfer member for electrophotography comprising a substrate and a surface layer provided on the substrate. The surface layer comprises a binder resin and a perfluoropolyether. An extraction amount of the perfluoropolyether per 10 mmof the surface layer, is 0.10 mg to 5.00 mg, the extraction amount of the perfluoropolyether obtained by immersing the intermediate transfer member into a solvent that can dissolve the perfluoropolyether at 25&#xb0; C. for 24 hours. A surface of the intermediate transfer member that is not subjected to first and second treatments, has a n-hexadecane contact angle of 55&#xb0; or more. A surface of the intermediate transfer member that has been subjected to the first treatment, has a n-hexadecane contact angle of 40&#xb0; or less. A surface of the intermediate transfer member that has been subjected to the second treatment, has a n-hexadecane contact angle of 50&#xb0; or more.

Intermediate transfer member for electrophotography and electrophotographic apparatus

The present invention relates to an electrophotographic intermediate transfer member that, even if an image is repeatedly and continuously transferred, can retain its transfer performance and can obtain an excellent image for a long time. The electrophotographic intermediate transfer member has a base layer and a surface layer, the surface layer has a matrix-domain structure in the cross section in the thickness direction, the matrix is formed of a binder resin, the domains contains a perfluoropolyether, and a microhardness of a surface of the electrophotographic intermediate transfer member measured by an ultramicro-hardness meter is 50 MPa or more.

Electrophotographic intermediate transfer member and electrophotographic apparatus

A member for electrophotography having a multilayer structure or a single-layer structure, including an outermost layer which satisfies the following A, B and C:

Member for electrophotography, process cartridge, and electrophotographic apparatus

An object of the present invention is to provide: an electrophotographic member which enhances image quality, prevents the lowering of a grade of an image even when images have been repeatedly output, and can remarkably enhance the stability of the grade of the image; an intermediate transfer member; and an image forming apparatus. The electrophotographic member includes a base layer and a surface layer, wherein the surface layer has a binder resin, perfluoropolymer fine particles, a fluorocarbon resin dispersing agent and a particular fluorine compound, wherein the perfluoropolymer fine particle has a fluorine compound carried on its surface.

Electrophotographic member, intermediate transfer member, image forming apparatus, and method for manufacturing electrophotographic member

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Kawasaki, Japan

Naoto Kameyama