Fuji Electric Co., Ltd.

Mie University

Tomoki Hasegawa

Shinjiro Suzuki

Fengqiang Zhu

Masaru Takeuchi

Hirotaka Kobayashi

Yuji Ogawa

Masamitsu Funaoka

A resin composition including a lignin skeleton capable of producing a heat-resistant molded article and being decomposed under relatively mild conditions. The resin composition contains a lignin skeleton including, as a base component, a phenolated lignin or a derivative thereof that contains a reactive monomer group, the phenolated lignin containing a phenol-containing monomer represented by the following general formula (I):

Resin composition with lignin skeleton and resin composition molded article

Provided are an electrophotographic photoconductor being resistant to abrasion even in long-term use, having highly sensitive electric characteristics, being capable of maintaining a high retention rate, and being capable of providing a stable image without filming, a method of manufacturing the same, and an electrophotographic device. The photoconductor includes an electroconductive substrate (), a charge generation layer (), and a charge transport layer (); the charge transport layer contains a hole transport material, a resin binder, an electron transport material, and an inorganic oxide; the charge generation layer contains a charge generation material; the masses of the hole transport material, the resin binder, the electron transport material, and the inorganic oxide in the charge transport layer respectively denoted by a to d satisfy 1.5&#x2264;b/a&#x2264;5.7, 0.005&#x2264;c/a&#x2264;0.35, 0.05&#x2264;d/a&#x2264;0.70, a&#x2265;c+d, and c/d&#x2265;0.01; the hole transport material contains a compound expressed by formula (A-1); and the charge generation material contains titanyl phthalocyanine having an exothermic peak at 251&#xb1;5&#xb0; C., a half-value width of the exothermic peak equal to or less than 15&#xb0; C., and a heating value equal to or greater than 1.0 mJ/mg when a temperature rise condition is 20&#xb0; C./min in differential scanning calorimetry, and having an X-ray diffraction peak at 27.2&#xb1;0.3&#xb0;. 

Electrophotographic photoconductor, method of manufacturing the same, and electrophotographic device

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer containing a charge transport portion including a first hole transport material represented by General Formula (1) below, a cured resin, and a cross-linked structure there between:  where Za is a polymerizable functional group with a Structural Formula (2), (3), or (4), Zb is a divalent group with a Structural Formula (6) or (7), Ra, Rb, Rc and Rd each are one of a branched or unbranched alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted styryl group, I is 0 or 1 when Za is (2) or (4) and 1 when Za is (3), m is from 0 to 5, n, o, and p are each from 0 to 4, q is from 1 to 3.

Electrophotographic photoreceptor, method of manufacturing the photoreceptor, and electrophotographic device

An electrophotographic photoconductor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate and containing a charge generation material, a hole transport material, a first electron transport material, from 3% by mass to 40% by mass of a second electron transport material, a resin binder, and an inorganic oxide filler surface-treated with a silane coupling agent. In a dipole-dipole force component (a Hansen solubility parameter), the first electron transport material and the silane coupling agent have a difference of &#x394;SPa&#x3c;2.50; the second electron transport material and the silane coupling agent have a difference of &#x394;SPb&#x3c;2.50; and the first electron transport material and the second electron transport material have a difference of 0.30&#x3c;&#x394;SPc&#x3c;1.00. In a London dispersion force component (a Hansen solubility parameter), the resin binder and the silane coupling agent have a difference of &#x394;SPd&#x3c;2.00.

Electrophotographic photoconductor, method of manufacturing the same, and electrophotographic device including the same

An electrophotographic photoreceptor includes an electroconductive substrate; and a photosensitive layer that is formed on the electroconductive substrate and that contains an inorganic oxide and a lubricant resin which contains a polycarbonate resin having a siloxane structure therein or a polyarylate resin having a siloxane structure therein. When light having a wavelength of 780 nm is irradiated onto a slurry containing 20% by mass of the inorganic oxide in a predetermined solvent to provide an inorganic oxide slurry, the inorganic oxide slurry has a light transmittance that is 80% or more. The photosensitive layer may be a negatively-charged laminate-type photosensitive layer, a monolayer type photosensitive layer, or a positively-charged laminate-type photosensitive layer. The electrophotographic photoreceptor is less worn upon long-term use, allows no filming, and can realize stable images. A method for producing the electrophotographic photoreceptor and an electrophotographic apparatus including the electrophotographic photoreceptor are disclosed.

Electrophotographic photoreceptor, production method thereof, and electrophotographic apparatus

The invention provides an electrophotographic photoreceptor, which undergoes little abrasion over long term use and is able to develop a stable image, as well as a method of producing the same and an electrophotographic device including the same. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer that contains an inorganic oxide and that is formed on the conductive substrate from a coating liquid. A test slurry containing 20% by mass of the inorganic oxide dispersed in a solvent for forming the coating liquid has a light transmittance of 40% or more in a test case where light having a wavelength of 780 nm irradiates the test slurry.

Electrophotographic photoreceptor, method for producing the same, and electrophotographic device including the same

A method of producing an electrophotographic photoreceptor composed of a photosensitive layer provided on a conductive substrate, includes, in the formation of an outermost layer, controlling slope k of a straight line obtained by plotting the average film density of outermost layer and boiling point of solvent used for the formation of the outermost layer along the ordinate and the abscissa, respectively, to be 1.50E-4 (g/cm&#xb7;&#xb0; C.) or greater, and adjusting the difference in film density of the outermost layer between the surface side and the side close to the conductive substrate to be 0.030 g/cmor less. The electrophotographic photoreceptor has reduced image defects even after long-term use and has excellent wear performance.

Method of producing an electrophotographic photoreceptor

An electrophotographic photoreceptor is provided that can achieve reductions in the amount of wear in the photoreceptor surface while producing an excellent image on a long-term basis. Also provided are a method of producing the electrophotographic photoreceptor and an electrophotographic apparatus. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate and being composed of a resin having a molecular structure optimized using molecular dynamic calculations that is a helical structure, and having a value for a ratio r/I between the diameter (r) and helix pitch (I) of the helical structure that ranges from 0.04 to 1.0.

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Hino, Japan

Tomoki Hasegawa