Patent classifications
G03G5/14726
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
An electrophotographic photoconductor includes a conductive substrate, and a photoconductive layer, in which an outermost surface layer contains a binder resin, a charge transporting material, fluorine-containing resin particles, and an acidic compound, the number of carboxyl groups in the fluorine-containing resin particles is 0 or more and 30 or less per 10.sup.6 carbon atoms of the fluorine-containing resin particles, and in a case where charging and exposure of the electrophotographic photoconductor are repeated 10,000 times under conditions of a charging potential of −700 V and an exposure intensity of 5 mJ/m.sup.2, an absolute value |RP.sub.1−RP.sub.10000| of a difference between a residual potential RP.sub.1 after charging and exposure once and a residual potential RP.sub.10000 after charging and exposure 10,000 times is 25 V or less.
ELECTROPHOTOGRAPHIC IMAGE SUPPORT
An electrophotographic image support includes: a conductive support; a photosensitive layer disposed on the conductive support; and a protective layer disposed on the photosensitive layer, the protective layer being formed of a polymerized cured product of a radically polymerizable composition containing a radically polymerizable monomer and a perfluoropolyether compound having a radically polymerizable functional group, the perfluoropolyether compound having the radically polymerizable functional group being represented by the following formula (1):
[Chemical Formula 1]
(B).sub.l-A-CF.sub.2O(CF.sub.2CF.sub.2O).sub.m(CF.sub.2O).sub.nCF.sub.2-A-(B).sub.l (1)
wherein A represents a linking group having a molecular weight of 100 or more and 400 or less, B represents a radically polymerizable functional group, l represents an integer of 2 or more, and m and n each represent an integer of 0 or more, wherein m+n≧1.
ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS
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, process cartridge, and image forming apparatus
An electrophotographic photoreceptor includes: a conductive base body and a photosensitive layer, in which an outermost surface layer of the electrophotographic photoreceptor contains fluorine-containing resin particles, and in which a fluorine atom concentration at a surface of the outermost surface layer is 1.5 to 5.0 times a fluorine atom concentration at a depth of 1 μm from the surface of the outermost surface layer, or in which a number density ratio of aggregates of the fluorine-containing resin particles in a second region defined in this specification, to aggregates of he fluorine-containing resin particles in a first region defined in this specification is less than 0.95, and a ratio of an area ratio of the fluorine-containing resin particles in the second region, to an area ratio of the flourine-containing resin particles in the first region is within a range of 1±0.1.
Electrophotographic belt and electrophotographic image forming apparatus
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): ##STR00001##
in the formula (I), R1 represents a linking group, and R2 represents a hydrogen atom or a methyl group; ##STR00002##
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.
Fluorine-containing resin particle, composition, layer-shaped article, electrophotographic photoreceptor, process cartridge, and image forming apparatus
A fluorine-containing resin particle contains 0 or more and 30 or less carboxyl groups per 10.sup.6 carbon atoms and 0 ppm or more and 3 ppm or less of a basic compound.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
The present disclosure provides an electrophotographic photosensitive member having excellent dispersibility of fluorine atom-containing resin particles, and excellent durability, with an occurrence of a ghost suppressed. In the electrophotographic photosensitive member having a surface layer, the surface layer includes a fluorine atom-containing resin particle, a binder material, a charge transport substance, and a polymer A having a specific structural unit, wherein the binder material is a thermoplastic resin, and a film thickness of the surface layer is 35 μm or larger and 50 μm or smaller.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
Provided is an electrophotographic photosensitive member including a surface layer, wherein the surface layer contains a fluorine atom-containing resin particle, a binder material, and a polymer having specific structural units.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE, AND METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
The present disclosure provides an electrophotographic photosensitive member having a surface layer that is excellent in dispersibility of a fluorine atom-containing resin particle and suppresses a potential fluctuation at the time of repeated use. The electrophotographic photosensitive member having the surface layer, wherein the surface layer includes the fluorine atom-containing resin particle, a binder material, and a polymer A having a specific structural unit.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
Provided is an electrophotographic photosensitive member including a surface layer, which is excellent in dispersibility of fluorine atom-containing resin particles and is suppressed from causing a ghost image. Specifically, provided is an electrophotographic photosensitive member including a surface layer, wherein the surface layer contains a fluorine atom-containing resin particle, a binder material, and a polymer A having specific structural units.