Fuji Electric Co., Ltd.

Kazuya Saito

Seizo Kitagawa

Toshiki Takeuchi

Shinjiro Suzuki

Keiichi Kurokawa

Masaru Takeuchi

Kazuki Nebashi

Hiroshi Emori

A photoconductor for electrophotography includes a base member; an anodic oxide coating provided on the base member and having a film thickness of 2 to 10 &#x3bc;m; an interlayer provided on the anodic oxide coating and containing a vinyl chloride-vinyl acetate copolymer resin and having a film thickness of 0.02 to 0.3 &#x3bc;m; and a photosensitive layer including a charge transport layer formed on the interlayer and containing a charge transport material and a first resin binder, and a charge generation layer laminated on the charge transport layer and containing a charge generation material, a hole transport material, a first electron transport material that is a naphthalenetetracarboxylic diimide compound, a second electron transport material that is an azoquinone compound, a diphenoquinone compound, or a stilbenequinone compound and that has a mobility of 17&#xd7;10cm/V&#xb7;s or more, and a second resin binder.

Photoconductor having interlayer for hole injection promotion

An electrophotographic photoreceptor, including a photosensitive layer formed on an electroconductive substrate. The photosensitive layer includes a charge-generating material and an electron-transporting material, and the electron-transporting material includes first and second electron-transporting materials. A difference in lowest unoccupied molecular orbital (LUMO) energy between the first electron-transporting material and the charge-generating material is in a range from 1.0 to 1.5 eV, and a difference in LUMO energy between the second electron-transporting material and the charge-generating material is in a range from 0.6 to 0.9 eV. A ratio of mass of the second electron-transporting material to a total of mass of the first electron-transporting material and the mass of the second electron-transporting material is in a range from 3 to 40%.

Electrophotographic photoreceptor, method for manufacturing same, and electrophotographic device

Provided is a positively charged electrophotographic photoconductor, a manufacturing method thereof, and an electrophotographic apparatus using the same. The positively charged electrophotographic photoconductor includes an electroconductive support and a single layer-type photosensitive layer provided thereon including a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin. Alternately, the positively charged electrophotographic photoconductor includes an electroconductive support; a charge transport layer provided on the electroconductive support and containing at least a hole transport material, and a binder resin; and a charge generation layer provided on the charge transport layer and including at least a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin. In either embodiment, the mixed binder resin contains at least two resins including a polycarbonate-based resin selected to provide the mixed binder resin with a water vapor permeability ranging from 5 to 13 g/m&#xb7;day.

Electrophotographic photoconductor, manufacturing method thereof, and electrophotographic apparatus using the same

An electrophotographic photoreceptor which, even when mounted on a high-image-quality monochrome high-speed printer or tandem color printer including a cleaner-less process of a non-magnetic single-component contact development system using a polymerized toner, inhibits the generation of fine black spots or color spots and suppresses the occurrence of toner filming during the initial printing under a high-temperature and high-humidity environment and thereby stably attains a high image quality in a variety of environments. The electrophotographic photoreceptor is a positively-chargeable electrophotographic having a contact angle between the surface of an outermost layer and water that is in a range of 81&#xb0; to 87&#xb0; and having a binder resin of an outermost layer containing resins having repeating units represented by Formula (1) and Formula (2) below: 

Electrophotographic photoreceptor, method for producing the same, and electrophotographic apparatus using the same

Provided is an electrophotographic photoreceptorincluding the outer periphery of a cylindrical substrate, at least a photosensitive layer. One or more processed linesare provided on one or both of end portions in the axial direction outside an image forming region of the outer peripheral surface of the substratealong the circumferential direction. Also provided is an image forming apparatus including the electrophotographic photoreceptor.

Growing community of inventors

Matsumoto, Japan

Kazuya Saito