Canon Kabushiki Kaisha

Youhei Ikeda

Arihiro Yamamoto

Syoji Inoue

Masanori Yokoyama

Masahiro Watanabe

Hidekazu Matsuda

Takehiko Aoyama

Hisao Kato

Tomoya Kawakami

Shota Segawa

Toshirou Uchida

Masaaki Kimura

Nanami Isozaki

Saki Sudo

A vehicle wiper blade comprises a blade support part and a lip part coupled swingably with the blade support part via a neck. The lip part comprises polyurethane. The polyurethane comprises a reactant of a composition including an isocyanate compound which includes diisocyanate and tri- or higher functional polyfunctional isocyanate, and an alcohol which includes tri- or higher functional polyfunctional alcohol. The diisocyanate has an aromatic ring in a molecule. When a molecule of the polyurethane is ionized with a mass spectrometer of a direct sample injection system, then obtained M1, M2 and M3 satisfy the following relation: M2/M1 is 0.001 to 0.028, M3/M1 is 0.020 to 0.110, and M2/M3 is 0.013 to 0.300, and a concentration of the polyfunctional alcohol in the polyurethane is 0.12 mmol/g to 0.65 mmol/g.

Vehicle wiper blade

The present invention is aimed at providing an electrophotographic cleaning blade that has excellent chipping resistance and can exhibit excellent cleaning performance. This cleaning blade is provided with an elastic member that includes a polyurethane and a support member that supports the elastic member, and cleans the surface of a member to be cleaned that is moving, by bringing a part of the elastic member into contact with the surface of the member to be cleaned. The average value of the elastic modulus of the elastic member obtained when measured using SPM is at least 15 MPa and not more than 470 MPa, and the coefficient of variation thereof is not more than 6.0%.

Electrophotographic cleaning blade, process cartridge, and electrophotographic image forming apparatus

A cleaning blade having a good followability of a contact portion to a surface to be cleaned, and being unlikely to cause turn-up, is provided. A cleaning blade includes an elastic member and a supporting member, and the elastic member has a hardened region at at least a part of a portion exposed to a surface thereof, and the hardened region includes a material containing a polyether structure and a nurated isocyanate structure.

Cleaning blade, process cartridge and electrophotographic image forming apparatus

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Mishima, Japan

Youhei Ikeda