摘要:
An object of the invention is to provide an image forming apparatus and process cartridge both employing the organic photoreceptor by improving an abrasion resistance of the organic photoreceptor up to the same level as an amorphous silicone photoreceptor, the image blur and image flow problem liable to generate in high temperature and high moisture condition, and to provide an organic photoreceptor capable of obtaining a precise and a high quality dot image by short wavelength laser exposure. Provided is an organic photoreceptor having a conductive substrate, provided thereon at least a photo receiving layer and a protective layer in this order, wherein the protective layer comprises at least a resin layer obtained by a reaction between a chain polymerizable compound having a charge transportable structure represented by Formula (1) and a chain polymerizable compound without having a charge transportable structure.
摘要:
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.
摘要:
Disclosed is an electrophotographic photoreceptor comprising on or over an electrically conductive support a photosensitive layer containing a pyranthrone compound represented by the following formula and the pyranthrone compound has a crystal structure exhibiting a CuKα X-ray diffraction spectrum having peaks at angles (2θ±0.2°) of 16.9°, 18.7° and 20.6°.
摘要:
An object of the present invention is to form a high density electrostatic latent image on an organic photoreceptor via image exposure using a semiconductor laser or a light-emitting diode of an oscillation wavelength of 350-500 nm; and to provide an organic photoreceptor exhibiting improved sensitivity and repetition characteristics or improved dot reproducibility deterioration, and an image forming apparatus employing the organic photoreceptor. In an organic photoreceptor having a charge generating layer and a charge transporting layer on a conductive support, an organic photoreceptor wherein a charge generating layer incorporates a binder resin and a Br substituted pyranthrone-based compound and the spectral spectrum of the charge generating layer has maximum absorption values each in the region of 430-445 nm, 500-510 nm, and 530-545 nm.
摘要:
Disclosed is an electrophotographic photoreceptor comprising on an electrically conductive support, a charge generation layer and a charge transport layer, wherein the charge transport layer comprises a charge transport material represented by formula (1) and exhibits a transmittance at 370 nm of not more than 10% and a transmittance at 405 nm of not less than 70%, and the charge transport layer further comprising a compound represented by formula (2), (3) or (4).
摘要:
Disclosed is an electrophotographic photoreceptor comprising on or over an electrically conductive support a photosensitive layer containing a pyranthrone compound represented by the following formula and the pyranthrone compound has a crystal structure exhibiting a CuKα X-ray diffraction spectrum having peaks at angles (2θ±0.2°) of 12.3°, 20.5°, 25.3° and 28.3°.
摘要:
An electrophotographic photoreceptor having a photosensitive layer on a conductive support, wherein the photosensitive layer comprises a pigment containing an adduct of titanyl phthalocyanine and 2,3-butanediol, and a ratio of an absorbance at a wavelength of 780 nm of the photosensitive layer (referred to as Abs780) divided by an absorbance at a wavelength of 700 nm of the photosensitive layer (referred to as Abs700) is 0.8 to 1.1, the ratio being referred to as Abs780/Abs700, and Abs780 and Abs700 each being calculated from a relative reflectance spectrum of the electrophotographic photoreceptor, wherein the relative reflectance spectrum is determined using an aluminum conductive support using a reflectance spectrum of the aluminum conductive support as a base line.
摘要:
An organic photoreceptor is described. The photosensitive layer contains a pyranthrone compound represented by Formula 1 which has been subjected to purification processing so as to have a mass reduction ratio D400/450 between 400° C. and 450° C. of not more than 2.0% in a thermogravimetric analysis; D400/450={(G400−G450)/Gi}×100 wherein Gi is a mass at 25° C., and G400 and G450 are each mass at 400° C. and 450° C., respectively, wherein R1 through R14 are each a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a halogen atom, a cyano group or a nitro group. The image forming method using the photoreceptor, and the pyranthrone compound are also disclosed.
摘要:
An organic photoreceptor having a photosensitive layer on a conductive support is disclosed, in which the photosensitive layer contains a pigment containing an adduct of titanyl phthalocyanine and at least either of (2R,3R)-2,3-butanediol and (2S,3S)-2,3-butanediol, the spectrum of the photosensitive layer has the absorption maximum value in the region of 750 to 780 nm, and the ratio of the absorbance at 780 nm (Abs 780) to the absorbance at 750 nm (Abs 750) (Abs 780/Abs 750, a value obtained by correcting the absorbance at 1000 nm as 0) is 0.6 to 1.0.
摘要:
An electrostatic image developing toner which is capable of obtaining highly chromatic full-color images of bright color without causing perceived color contamination and exhibits superior lightfastness is disclosed, wherein the toner comprises a binding resin and a colorant, and the colorant is tetraazaporphyrin or phthalocyanine compounds such as a compound represented by the following formula: