Mitsubishi Chemical Corporation

Mitsubishi Kasei Corporation

Takahiro Choda

Akira Ando

Yukio Chida

Tetsuhiko Nishimura

Atsushi Yoshizawa

Daisuke Yamazaki

Yasuo Oguri

Mamoru Nozomi

Mitsuo Wada

Hiroaki Takamura

Hiroe Fuchigami

Wataru Miyashita

Itaru Ogawa

Syunichiro Kurihara

The present disclosure relates to an electrophotographic photoreceptor including at least a photosensitive layer and a protective layer in sequence on a conductive support, and the protective layer contains a cured product of a curable compound, conductive particles having a band gap of 2.0 eV or more and 3.6 eV or less, and particles having a band gap of 8.0 eV or more.

Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, and image forming apparatus

An object of the present invention is to provide an electrophotographic photoreceptor which can prevent an increase in potential even using a fluorine resin in a charge transport layer, and can achieve both electrical properties and abrasion resistance, and present invention relates to a lamination type electrophotographic photoreceptor, in which a charge transport layer of the lamination type electrophotographic photoreceptor contains a compound having an E_homo of &#x2212;4.550 eV or more based on structure optimization calculation by density functional calculation B3LYP/6-31G (d, p) and fluorine resin particles, and a content of the fluorine resin particles is 3% by weight to 20% by weight based on a total mass of the charge transport layer.

Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge and image forming apparatus

The present invention relates to an electrophotographic photoreceptor including a conductive support and a photosensitive layer on the conductive support, and the photosensitive layer contains a polymer A containing a repeating structural unit represented by a specific formula, and a polymer B containing a repeating structural unit represented by a specific formula. In addition, the present invention relates to an electrophotographic photoreceptor cartridge and an image forming apparatus including the electrophotographic photoreceptor.

Electrophotographic photosensitive member and process for producing the same

An electrophotographic copying method, which comprises conducting each process of at least charging, exposing to light, developing and transferring, characterized in that the photoreceptor has at least an undercoat layer and a photosensitive layer on an electroconductive substrate, wherein the undercoat layer contains a semiconductive material having a band gap of at least 2.2 eV and a binder resin, the photosensitive layer contains at least a phthalocyanine compound as a charge-generation material, and image-formation is carried out from the first revolution of the photoreceptor.

Electrophotographic copying method and electrophotographic copying

The present invention relates to a piezoelectric ceramic composition for actuator which is a composition comprising a basic composition containing lead, lanthanum, alkali earth metals, zirconium, titanium and oxygen in the formulation represented by the following general formula (I): ##EQU1## where A represents one or more element(s) selected from the group consisting of Ba, Ca and Sr; 0&lt;x.ltoreq.0.07; 0.40.ltoreq.y.ltoreq.0.65; and 0&lt;m.ltoreq.0.15, wherein the ceramic composition containing, relative to the basic composition, one or more element(s) selected from the group consisting of iron, aluminum, manganese, indium and tellurium in an amount of 0.02 to 0.3% by weight in terms of Fe.sub.2 O.sub.3 or Al.sub.2 O.sub.3, 0.02 to 0.2% by weight in terms of MnO.sub.2 and 0.02 to 0.5% by weight in terms of In.sub.2 O.sub.3 or TeO.sub.2. The composition according to the present invention is higher in piezoelectric strain constant and in Curie point, so that the element can be used over a wide range of temperature. This makes the composition useful as the material for piezoelectric actuators, contributing to various industrial application fields.

Piezoelectric ceramic composition for actuator

A piezoelectric ceramic composition for actuators, composed of lead, lanthanum, zirconium, titanium, magnesium, zinc, niobium, manganese, chromium and oxygen atoms, which contains manganese in an amount of at most 1.5% by weight as calculated as Mn.sub.2 O and chromium in an amount of at most 0.5% by weight as calculated as Cr.sub.2 O.sub.3, relative to a main component composition of the formula (I):

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Yokohama, Japan

Takahiro Choda