画像形成装置、及び、プロセスカートリッジ

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, IMAGE-FORMING DEVICE, AND CURED FILM

PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which prevents an afterimage (ghost image) due to residual preceding images. SOLUTION: An outermost surface layer of the electrophotographic photoreceptor is made of a cured film of a composition including triphenyl methane, diphenyl methane, and tetraphenylmethan, and a charge transporting material having a chain polymerizable functional group. COPYRIGHT: (C)2011,JPO&INPIT ...

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, CHARGE TRANSPORT COMPOSITION, AND CHARGE TRANSPORT CURED FILM

PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having an outermost surface layer excellent in charge transport properties. SOLUTION: The outermost surface layer of the electrophotographic photoreceptor is a layer comprising a cured film of a composition containing at least one compound having a chain-polymerizable functional group and a charge transport skeleton in one and the same molecule and an addition-cleavage chain transfer agent. COPYRIGHT: (C)2011,JPO&INPIT ...

電子写真感光体、プロセスカートリッジ、及び画像形成装置

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, METHOD FOR PRODUCING THE SAME, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To obtain an image that is excellent in image quality without environmental dependence even when used repeatedly over a long period of time. SOLUTION: An electrophotographic photoreceptor includes at least a substrate and photosensitive layers on the substrate, wherein the layer constituting the outermost surface among the photosensitive layers contains a polymer obtained by polymerizing a polyfunctional (meth)acrylate having an isocyanuric acid skeleton represented by the following general formula (A) in the presence of at least a charge transport material. In general formula (A), X1 to X3 are each independently a group represented by general formula (X), -H, or an alkyl group, wherein at least two of X1 to X3 are the groups represented by general formula (X). In the general formula (X), R1 is an alkylene group which may have a substituent, an ether group, or an ester group; and R2 to R4 are each independently -H or an alkyl group. COPYRIGHT: (C)2012,JPO&INPIT ...

電子写真感光体、プロセスカートリッジ、及び画像形成装置

FLUORINE CONTAINING POLYAMIC ACID FOR IMAGE FORMING MEMBER, FLUORINATED POLYIMIDE ENDLESS BELT, BELT UNIT, AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide a fluorine containing polyamic acid that has mechanical strength higher than before, has high water repellency, and is used for an endless belt in an image forming member, especially a transferring or fixing member. SOLUTION: This fluorine containing polyamic acid for the image forming member is obtained by polymerizing (A) diamine compound containing no fluorine atom, (B) tetracarboxylic acid dianhydride containing no fluorine atom, and (C) terminal sealant containing fluorine atom. The fluorine content in fluorinated polyimide after imide conversion is higher than 0 mass% and 8.0 mass% or lower. COPYRIGHT: (C)2011,JPO&INPIT ...

電子写真感光体、プロセスカートリッジ、及び画像形成装置

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND CURED FILM

PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which suppresses the occurrence of an afterimage phenomenon (ghosting) caused by leaving a history of a previous image. SOLUTION: An outermost surface layer of the electrophotographic photoreceptor is the layer comprising a cured film of a composition containing at least one selected from a nitroso compound, nitrone compound and nitro compound and a charge transporting material having a chain polymerizable functional group. COPYRIGHT: (C)2011,JPO&INPIT ...

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor suppressing the occurrence of an afterimage phenomenon (ghost) due to residual history of the former image. SOLUTION: The electrophotographic photoreceptor has an outermost layer composed of a cured film of a composition including at least one kind of compound having a chain-polymerizable functional group and a charge-transportable backbone in the molecule thereof, a polymerization initiator and a radical deactivator. COPYRIGHT: (C)2011,JPO&INPIT ...

電子写真感光体、プロセスカートリッジ、画像形成装置

チオール基含有電荷輸送材料、チオール基含有電荷輸送材料溶解液、光電変換デバイス、および電子写真感光体

電子写真感光体、プロセスカートリッジ、画像形成装置、電荷輸送性組成物、及び電荷輸送性硬化膜

電子写真感光体、画像形成装置およびプロセスカートリッジ

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that prevents degradation of picture quality after repeated use. SOLUTION: The electrophotographic photoreceptor includes a photosensitive layer on a conductive substrate. An outermost layer of the electrophotographic photoreceptor comprises a cured film of a composition which includes at least one kind of charge transporting compound (a) having a charge transporting skeleton and at least two structures represented by R-O-CO-CR'=CH-R" in one molecule, and at least one kind of polycarbonate resin. In the outermost surface layer, a ratio (IA/IC) between an absorption peak intensity (IA) resulting from stretching vibration of a carbonyl group having a structure represented by the above R-O-CO-CR'=CH-R" and an absorption peak intensity (IC) resulting from stretching vibration of a carbonyl group of the polycarbonate resin in an IR absorption spectrum, is 0.5 to 10. The half-value width of the absorption peak of the absorption ...

IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE

PROBLEM TO BE SOLVED: To provide an image forming apparatus in which frictional electrification is hardly caused to an electrophotographic photoreceptor. SOLUTION: The image forming apparatus includes: an electrophotographic photoreceptor having an outermost layer configured to include a cured product having a charge transporting skeleton; a charging unit that charges the electrophotographic photoreceptor; an electrostatic latent image forming unit that forms an electrostatic latent image at the charged electrophotographic photoreceptor; a developing unit that develops the electrostatic latent image formed at the electrophotographic photoreceptor by a developer to form a toner image, the developing unit storing the developer containing a toner having toner particles containing a crystalline resin and having a shape factor SF1 of 100-150 in addition to a volume average particle diameter of 3-6 μm, and fluorocarbon resin particles as an external additive; a transfer unit that transfers the ...

電荷輸送膜、有機電子デバイス、電子写真感光体、プロセスカートリッジ、及び画像形成装置

電子写真感光体、プロセスカートリッジ、画像形成装置、及び硬化膜