Bridgestone Corporation

Kenji Sato

Kenichi Sugimoto

Masato Yoshikawa

Nobuko Kato

Yoshinori Iwabuchi

Shinichiro Sugi

A rubber based composite material having a rubber composition and, adhered thereto, a reinforcing material having a coating film containing a metal or a metal compound capable of reacting with sulfur formed on the surface of the material, characterized in that the oxygen content in the coating film increases toward the reinforcing material in the thickness direction.

Rubber-based composite material and the rubber article using the same

Disclosed is a process for producing a rubber-based composite material, including the steps of forming, by sputtering, an adhesion film on a substrate to be mated with a rubber for constituting the composite material, laminating a rubber composition on the adhesion film, and vulcanizing the rubber composition, the sputtering is conducted by using a first target and a second target, composed of different metallic components and provided in a chamber, while moving the substrate in sputtering atmospheres formed by applying electric power simultaneously to the first and second targets. Also disclosed is a process for producing a rubber-based composite material, including the steps of forming, by sputtering, an adhesion film on a substrate to be mated with a rubber for constituting the composite material, laminating a rubber composition on the adhesion film, and vulcanizing the rubber composition, wherein the sputtering is conducted by using a plurality of targets, composed of metals or metallic compounds containing different metallic elements and provided in a chamber, while rotating the substrate in sputtering atmospheres formed by applying electric power simultaneously to the targets.

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Kodaira, Japan

Kenji Sato