Konica Minolta, Inc.

Konica Minolta Business Technologies, Inc.

Masanori Yumita

Toyoko Shibata

Tomoko Sakimura

Daisuke Kodama

Hirofumi Hayata

Shinichi Hamaguchi

Toshiyuki Fujita

Mari Konishi

Fumitaka Mochizuki

Keiichi Inagaki

An electrophotographic photosensitive body includes at least a photosensitive layer and a protective layer sequentially laminated on an electroconductive support, wherein the protective layer has a domain containing perfluoropolyether.

Electrophotographic photosensitive body and image forming apparatus

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.

Photoconductor and method for producing the same

An electrophotographic photoreceptor includes: a conductive support; a photosensitive layer disposed on the conductive support; and a protective layer disposed on the photosensitive layer, wherein the protective layer is formed of a polymerized and cured product of a radically polymerizable composition containing a radically polymerizable monomer, a perfluoropolyether compound having a radically polymerizable group, and metal oxide fine particles having a radically polymerizable group.

Electrophotographic photoreceptor

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 intermediate layer, a photosensitive layer, and a surface protective layer, deposited in this order on an electroconductive support. The surface protective layer includes a resin and a p-type semiconductor microparticle contained in the resin. The intermediate layer includes a resin and at least one metal oxide microparticle contained in the resin. The at least one metal oxide microparticle is selected from the group consisting of untreated tin oxide particles, tin oxide particles surface-treated with organic compounds, untreated anatase titanium oxide particles, anatase titanium oxide particles surface-treated with organic compounds, untreated rutile titanium oxide particles, and rutile titanium oxide particles surface-treated with organic compounds.

Electrophotographic photoreceptor, image forming apparatus, and image forming process

The electrophotographic photoreceptor of the present invention includes a conductive support, a photosensitive layer disposed on the conductive support, and a surface protective layer disposed on the photosensitive layer. The surface protective layer contains a binder resin and a fine particulate material containing at least one compound selected from MgCuO, CaCuO, SrCuO, and BaCuO.

Electrophotographic photoreceptor, and method and apparatus of forming electrophotographic image

In an organic photoreceptor that has a protective layer formed on an organic photosensitive layer, the protective layer contains; a cured resin constituent obtained by polymerizing a polymerizable compound in the presence of a radical scavenger represented by the general formula (2); metal oxide microparticles; and a compound represented by the general formula (1) as a charge transport substance, and the relational expression (1): 80/A&#x2266;B&#x2266;160/A and the relational expression (2): 12&#x2266;A&#x2266;25 are satisfied when the volume ratio (volume %) of the metal oxide microparticles in the protective layer and the volume ratio (volume %) of the compound represented by the general formula (1) in the protective layer are respectively denoted by A and B.

Organic photoreceptor, image forming apparatus, and image forming method

Provided is an electrophotographic photoreceptor exhibiting not only excellent durability together with high sensitivity but also excellent image reproduction, which is suitable for an image forming method by which imagewise exposure is performed employing a light source having an emission wavelength peak being in the range of 350-500 nm to form a high density electrostatic latent image on a photoreceptor, and also provided are an image forming method employing the electrophotographic photoreceptor, and an image forming apparatus thereof. Also disclosed is an electrophotographic photoreceptor possessing a conductive support and provided thereon, a charge generation layer and a charge transport layer, wherein the charge generation layer possesses a pyranthrone pigment, and the charge transport layer possesses at least one of compounds represented by Formula (1) or Formula (2) described below: 

Electrophotographic photoreceptor, image forming method and image forming apparatus

An electrophotographic photoreceptor is disclosed, comprising on or over an electrically conductive support a photosensitive layer containing a charge generation material and a charge transfer material, wherein the charge generation material is comprised of two or more compounds represented by the following formula wherein X and Y are each an alkyl group or a halogen atom, n is an integer of 1 to 6 and m is an integer of 0 to 6, and wherein the compounds differ in at least one of m and n of the formula.

Growing community of inventors

Hachioji, Japan

Masanori Yumita