Sumitomo Riko Company Limited

Tokai Rubber Industries, Ltd.

Yosuke Hayashi

Masanori Ishida

Kentaro Imai

Shuichi Egawa

Atsushi Ozaki

Takeru Horiuchi

Kadai Takeyama

Kazushi Yamaguchi

Yasuyuki Hayasaki

Daisuke Inoue

Kazuhiro Iida

Toshihiko Arata

Naoki Yamaguchi

Shinkichi Kashihara

Satoshi Tatsumi

Yuma Yoshida

Manabu Sakuda

Koji Morihara

Minobu Iinuma

Fumio Misumi

Keiichi Inoue

Masanori Satou

To provide a conductive roll for an electrophotographic apparatus that includes a conductive rubber elastic body layer having a lower hardness and lower settling properties than a conventional conductive rubber elastic body layer. A conductive rollfor an electrophotographic apparatus includes a shaft bodyand a conductive rubber elastic body layerprovided on the outer periphery of the shaft bodythe conductive rubber elastic body layercontaining polar rubber, non-polar rubber, and a dispersing agent, wherein the polar rubber is at least one of nitrile rubber, hydrin rubber, and chloroprene rubber, wherein the non-polar rubber is at least one of isoprene rubber, hydrogenated isoprene rubber, and natural rubber, and wherein the dispersing agent is at least one of a polymer containing a block made of a nitrile rubber component and a block made of an isoprene rubber component, modified natural rubber, and modified isoprene rubber.

Conductive member for electrophotographic apparatus

An electrophotographic device member R is used in an electrophotographic device. The electrophotographic device member R has a surface layer. The surface layerhas a matrix polymerforming a skeleton of the surface layerand a surface modifiercontained in the matrix polymer. The surface modifieris composed of a copolymer containing, in its molecule, a first polymerization unit derived from a (meth)acrylate having a silicone groupand a second polymerization unit derived from a (meth)acrylate having a fluorine-containing group

Electrophotographic device member

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.

The object of the present invention is to provide a conductive roll having high resistance to permanent set and high resistance to adhesion. The conductive rollhas a rubber elastic portion formed of a rubber material including a carbon-carbon double bond and exhibiting electric conductivity. The surface of the rubber elastic portion is exposed as the surface of the roll. An organic group including one or more groups selected from silicone groups and fluorine-containing groups is bonded through an isocyanuric acid skeleton to the surface of the rubber elastic portion. The organic group may be a group derived from an organic compound including one or more groups selected from silicone groups and fluorine-containing groups and having a carbon-carbon double bond.

Conductive roll

Provided is a developing roll for use in an electrophotographic machine capable of preventing an ion conductive agent from blooming and retaining long-term charge decay characteristics. The roll () includes a shaft (), an elastomeric layer () and a surface layer (), wherein the surface layer contains a composition containing an (A) ingredient defining a binder resin having a functional group reactive with an alkoxy silyl group in a (B) ingredient, and the (B) ingredient defining an ion conductive agent containing a cation having a chemical structure represented by R1-N-R2-Si(OR3), where R1: a cyclic organic group or a linear organic group, R2: a group containing at least (CH2)n, n representing an integer number, and R3: an alkyl group, wherein the cation is bound with the (A) ingredient, and wherein the (B) ingredient is 0.10 to 3 parts by mass with respect to 100 parts by mass of the (A) ingredient.

Developing roll for electrophotographic machine

Growing community of inventors

Aichi, Japan

Yosuke Hayashi