Nok Corporation

Synztec Co., Ltd.

Syo Kawabata

Kenji Sasaki

Natsumi Kimura

Katsumi Abe

Shuji Abe

Yasushi Sugiyama

Hiroaki Kaneda

Hidetomo Mukai

Miyuki Abe

Katsuya Shimotsuma

Koji Nishiguchi

A cleaning bladeincludes an elastic bodythat is a molded body of a rubber base material, and which has at least a surface treatment layerin a portion of the elastic body, the portion coming into contact with an object to be contacted. The surface treatment layeris formed by impregnating a surface portion of the elastic bodywith a surface treatment liquid, which contains an isocyanate compound and an organic solvent, and curing the surface treatment liquid; the surface treatment layerhas an elastic modulus of 95 MPa or less; the elastic bodyhas an elastic modulus of from 20 MPa to 60 MPa (inclusive); and the difference between the elastic modulus of the surface treatment layerand the elastic modulus of the elastic bodyis 1 MPa or more.

Cleaning blade

A cleaning blade has an elastic body formed of a urethane elastomer, and a treated surface layer formed at least at a portion which comes into contact with a contact target of the elastic body. The treated surface layer is formed through impregnating a surface portion of the elastic body with a surface treatment liquid containing a bifunctional isocyanate compound, at least one polyol, and an organic solvent; or a surface treatment liquid containing an isocyanate group-containing compound having an isocyanate group at an end thereof, which compound is a reaction product of the bifunctional isocyanate compound with the at least one polyol, and an organic solvent, and curing the surface treatment liquid. The difference between the nitrogen concentration at the surface and the nitrogen concentration in the elastic body at a depth of 0.5 mm from the surface of the treated surface layer is 0.02 to 0.15 mass %.

A cleaning blade () having an elastic body () molded from a rubber base material, and having at least a surface treatment layer () on the area of the elastic body () that is brought into contact with a body to be contacted, wherein the surface treatment layer () is formed by impregnating the surface layer portion of the elastic body () with a surface treatment liquid containing an isocyanate compound and an organic solvent and hardening the liquid. The elasticity modulus of the surface treatment layer () is 40 MPa or less, the elasticity modulus of the elastic body () is 3-20 MPa, and the difference between the elasticity modulus of the surface treatment layer () and the elasticity modulus of the elastic body () is 1 MPa or more.

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Kanagawa, Japan

Syo Kawabata