Konica Corporation

Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Hirofumi Hayata

Toshiyuki Fujita

Masahiko Kurachi

Akira Kinoshita

Toyoko Shibata

Seijiro Takahashi

Tomoko Suzuki

Shinichi Suzuki

Takeshi Ishida

Osamu Sasaki

Tomoo Sakimura

Seisuke Maeda

Kunihiro Ogura

Masao Asano

Kouji Sugama

Shinichi Hamaguchi

Takeo Oshiba

Haruo Horiguchi

Kazuhisa Shida

Masanori Yumita

Kageyuki Tomoyori

Daisuke Kodama

Asao Matsushima

Tomohiro Oshiyama

Kazumasa Watanabe

Naohiro Hirose

Kenichi Yasuda

Tomoe Kitani

Yoshio Takizawa

Yoshihiko Etoh

Yukiko Nakai

Tsuyoshi Shimoda

Yukiko Kusano

Naoto Abew

Syozo Mitsui

Chigusa Miyake

A composition includes an isomerized polymer containing a structural unit containing an isomerized structure and an isomerized low molecular weight compound, the composition being fluidized by light irradiation from a solid state and being reversibly non-fluidized.

Photoresponsive material, adhesive, optical switching material, toner, and image forming method

Disclosed is a compound containing a specific structure having an azomethine part, the compound being reversibly fluidized and non-fluidized by being irradiated with light.

Photoresponsive low-molecular weight material, adhesive, toner, and image forming method

An electrophotographic photoreceptor includes at least a photosensitive layer and a protective layer sequentially layered on a conductive support, wherein the protective layer contains a cured product of a curable composition containing p-type semiconductor fine particles, an n-type organic semiconductor, and a polymerizable compound.

Electrophotographic photoreceptor and image forming apparatus and image forming method using the same

An electrophotographic photoreceptor includes an intermediate layer, a photosensitive layer, and a surface layer laminated on a conductive support in this order, wherein a cured product of a polymerizable monomer contains an electron transport agent and n-type metal oxide fine particles to which a reactive organic group is bonded in the surface layer.

Electrophotographic photoreceptor, image forming method, and image forming apparatus

An electrophotographic photoreceptor includes an electrically conductive support, a photosensitive layer formed on the electrically conductive support and a surface layer formed on the photosensitive layer. The surface layer contains a resin produced by polymerizing a cross-linkable polymerizable compound, N-type semiconductor fine particles and P-type semiconductor fine particles.

Electrophotographic photoreceptor

Disclosed is an electrophotographic photoreceptor including a conductive supporting body, a photosensitive layer and a protective layer. In the electrophotographic photoreceptor, at least the photosensitive layer and the protective layer are sequentially layered on the conductive supporting body, and the protective layer includes P-type semiconductor particles.

An organic photoreceptor having a photosensitive layer, an electric conductive support, and a protective layer is disclosed, in which the protective layer comprises a composition produced by reacting tin oxide particles an acryloyl or methacryloyl group on their surface with a compound having an acryloyl or methacryloyl group. A production method of the same, an image forming apparatus and a process cartridge using the same are also disclosed.

Organic photoreceptor, manufacturing method of organic photoreceptor, and image forming apparatus

Disclosed is an organic photoreceptor comprising on an electrically conductive support a light-sensitive layer and a surface layer, wherein the surface layer comprises a resin formed by curing a photocurable compound containing at least one polar group and at least one photocurable-functional group and a particulate metal oxide having a water absorption of 0.1 to 10%. There are also disclosed an image forming apparatus and a process cartridge.

Organic photoreceptor, image forming apparatus and process cartridge

In the present invention, disclosed is an organic photoreceptor comprising a conductive support and provided thereon, a photosensitive layer and a protective layer provided on the photosensitive layer, the protective layer formed with alumina particles each comprising a reactive organic group. Also provided is an organic photoreceptor with which electrophotographic images having high durability together with high image quality can be obtained by improving a wear property of the organic photoreceptor up to the same level as that of an amorphous silicon photoreceptor, as well as by improving image flow and image blur which are easy to be generated at high temperature and high humidity.

Disclosed is an electrophotogaphic photoreceptor that causes little or no abrasion-derived uneven image density and does not cause scratches and image defects attributable to the occurrence of scratches even after a large volume, for example, exceeding 1,000,000 sheets of printing, and that does not cause image blurring even after printing in an environment of a high-temperature and a high-relative humidity (RH) respectively exceeding 30&#xb0; C. and 80%. The electrophotographic photoreceptor comprises an electroconductive support and at least a photosensitive layer and a surface layer provided on the electroconductive support and is characterized in that the surface layer contains at least a compound obtained by reacting a polymerizable compound containing a methacryl group with particles containing a functional group reactive with the methacryl group and, in the polymerizable compound, the ratio between the number of methacryl groups and the molecular weight (number of methacryl groups/molecular weight) is not less than 0.0055.

Electrophotographic photoreceptor, image forming apparatus, and method for image formation

An organic photoreceptor is disclosed, comprising, on an electrically conductive support, a photosensitive layer and a protective layer containing metal oxide particles produced by a plasma method, and the protective layer being formed by curing a composition containing the metal oxide particles and a curable compound. There is also disclosed a preparation method of the organic photoreceptor.

Organic photoreceptor and preparation method thereof

An electrophotographic photoreceptor is provided with a conductive support; a photosensitive layer provided on the conductive support; and a surface layer provided on the photosensitive layer, wherein the surface layer contains a reaction product of surface-treated inorganic fine particles which are applied with a surface treatment with a metal oxide and a surface treatment with a compound having a polymerizable functional group.

Electrophotographic photoreceptor, image forming apparatus, and process cartridge

An image forming method and image forming apparatus based on the application thereof wherein comet-like deposits do not appear on the surface of the photoreceptor even after prolonged use of small-diameter toner, and there is no dropout or damage on the photoreceptor surface in the image forming process using an intermediate transfer member. This image forming method contains a process wherein the toner developed on an electrophotographic photoreceptor is transferred onto an intermediate transfer member, and the toner contains at least a metallic oxide and metallic soap added as external additive agents, and the protective layer contains a resin component obtained by reaction of at least a curable compound, and alumina particles.

Image forming method and image forming apparatus

An organic photoreceptor comprising a photosensitive layer on a conductive substrate and a protective layer on the photosensitive layer, wherein the protective layer is a surface layer prepared via reaction curing of a compound having a radical polymerizable, curable functional group using a polymerization initiators and the content of the polymerization initiator detected in the photosensitive layer is at most 5,000 ppm.

Organic photoreceptor, image forming apparatus, process cartridge, and color image forming apparatus

An objective is to provide a high releasing electrophotographic photoreceptor exhibiting lubricity and mechanical strength. The photoreceptor possessing a photosensitive layer on a conductive support, wherein an outermost layer of the photoreceptor comprises a fluorine resin represented by the following formula. wherein each of X, Y and Z represents a hydrogen atom, a halogen atom, a halogen-substituted alkyl group or a halogen-substituted alkoxy group; at least one of X, Y and Z represents a fluorine atom; each of R, R, Rand Rrepresents a hydrogen atom, a halogen atom or a halogen-substituted alkyl group; each of R, R, and Rrepresents a hydrogen atom, a halogen atom or a halogen-substituted alkyl group; at least one of R, R, and Rrepresents a fluorine atom; n1 represents an integer of 1-8000; and n2 represents an integer of 0-4000.

Growing community of inventors

Tokyo, Japan

Hirofumi Hayata