Sumitomo Riko Company Limited

Shuichi Egawa

Yosuke Hayashi

Takeru Horiuchi

Masanori Ishida

Yasuyuki Hayasaki

Kazushi Yamaguchi

Kentaro Imai

Kazuhiro Iida

Kengo Fujii

Keiichi Inoue

An electrophotography device development roller in which an increase in the electric charge of a toner is suppressed is provided. This electrophotography device development rolleris provided with a shaft, an elastic layerformed on the outer circumference of the shaft, and a surface layerformed on the outer circumference of the elastic layer. The surface layercontains components (a) to (c) below. Component (a) a binder comprising acrylonitrile-butadiene rubber having an acrylonitrile amount of 30 mass % or more; component (b) an ion-conducting agent comprising at least one selected from a phosphonium salt and a pyridinium salt; and component (c) an electric charge regulator comprising an acrylic polymer having a silicone group or fluorine-containing group and a cationic group.

Electrophotography device development roll including shaft, elastic layer and surface layer

A modified polymer bodyhas a polymer bodycomposed of a polymer material containing a carbon-carbon double bond and first binding partsand second binding partsbound to the surface of the polymer body. The first binding partsare such that an organic grouphaving a functional group is bound via an isocyanuric acid skeletonto the surface of the polymer body. The second binding partsare such that an organic grouphaving a functional group is directly bound to the surface of the polymer bodywithout interposing an isocyanuric acid skeleton

Conductive member for electrophotographic image forming apparatus

An electrophotographic device member can be configured as a roll member, a blade member, a belt memberor the like, and a modified rubber elastic bodyis used as a material for a portion including the surfaces of the respective members. The modified rubber elastic bodyhas a rubber elastic bodyhaving rubber elasticity and a surface-treated layercomposed of a cured product of photocurable composition impregnated into the rubber elastic bodyfrom the surface thereof. The photocurable composition is configured to include a (meth)acryl monomer, a photopolymerizable polymer having a silicone group and/or a fluorine-containing group and a (meth)acryloyl group in a molecule, and a photopolymerization initiator.

Electrophotographic device member

Growing community of inventors

Aichi, Japan

Shuichi Egawa