Electrophotographic photoreceptor, image forming apparatus, and coating liquid for forming photosensitive layer
AssigneeMitsubishi Chemical Corporation
InventorsHiroe Fuchigami, Mitsuo Wada
Life of this patent
Estimating the term…
Abstract
The present invention relates to an electrophotographic photoreceptor which is a positive charging type electrophotographic photoreceptor comprising a conductive support and a photosensitive layer on the conductive support, wherein the photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and a binder resin in the same layer, and a residual potential VL1 at a point at which an exposure amount for forming a latent image is 0.3 μJ/cm2 is equal to or lower than 130 V when an initial surface potential V0 is set to +700 V, exposure with monochromatic light of 780 nm is performed and measurement is performed by a dynamic method.
Claims14
An electrophotographic photoreceptor which is a positive charging type electrophotographic photoreceptor comprising a conductive support and a single-layer type photosensitive layer on the conductive support, wherein
- the single-layer type photosensitive layer comprises a charge generating material, a hole transport material, an electron transport material, a filler, a polyvinyl acetal resin, and a binder resin other than the polyvinyl acetal resin, in the same layer, and
- the charge generating material comprises oxytitanium phthalocyanine, which has a main clear peak at a Bragg angle 2θ±0.2° of 27.2° in powder X-ray diffraction using a CuKα characteristic X-ray.
A coating liquid, which comprises a polyvinyl acetal resin, a binder resin other than the polyvinyl acetal resin, a charge generating material, a hole transport material, an electron transport material and a solvent, and comprises oxytitanium phthalocyanine which has a strong diffraction peak at a Bragg angle (2θ±0.2) of 27.2° in X-ray diffraction by a CuKα ray, as the charge generating material, wherein
- when the coating liquid is stored under conditions of a temperature of 55° C. and relative humidity of 10%, for 96 hours, a changing rate of a half decay amount E½ in the photoreceptor is equal to or less than 75%.
Dependencies are inferred from the claim text.