Nitta Corporation

Shinichi Inoue

Inoue Shinichi

Tomohiro Nishio

Toshiaki Kasazaki

Ikuzo Usami

Yasushi Kobuchi

Haruhiko Ito

Kenichi Horiuchi

Kiyotaka Inoue

Rubber-like or rubber-like-material-containing articles contain or are made from hydrogenated natural polyisoprenoids or modified products thereof. These rubber-like or rubber-like-material-containing articles include a rubber-like elastic article made from a hydrogenated natural polyisoprenoid or a modified product thereof. A polymer obtained by reacting a natural polyisoprenoid with hydrogen in a solvent in the presence of a hydrogenation catalyst, for example, can be used as the hydrogenated natural polyisoprenoid. The hydrogenated natural polyisoprenoid preferably has a degree of hydrogenation of 50% or more. The hydrogenated natural polyisoprenoid preferably has a weight-average molecular weight of 20&#xd7;10or more and a molecular-weight distribution of 2.0 or more. The rubber-like or rubber-like-material-containing articles have excellent heat resistance and weather resistance, and are also excellent in view of resources and environment, because they use plant-derived raw materials.

Rubber-like articles and rubber-like material-containing articles

A separator that is excellent in workability and corrosion resistance, and allows a reduction in the number of constituent components of a fuel cell and the number of manufacturing process steps, and a manufacturing method therefore are provided. A separator includes a separating section for achieving separation between a hydrogen gas channel and an oxygen gas channel, and a sealing section disposed along an outer periphery of the separator, for preventing leakage of hydrogen and oxygen gases. The separating section and the sealing section are formed integrally with each other by means of plastic deformation processing, e.g., press working, of a metal thin sheet. A coating layer is formed n the metal thin sheet to coat the metal thin sheet's surface, and a DC power generated at an interface between a high polymer membrane and a catalytic electrode on contact of the coating layer with the catalytic electrode is taken out as a DC current and is collected at a power collector plate after passing through an interior of the separator. A high polymer elastic layer is provided at the part contacting the high polymer membrane of a sealing projection of the sealing section. The polymer elastic layer contacts the polymer film to seal.

Fuel cell separator that is excellent in workability and corrosion resistance

Growing community of inventors

Yamatokohriyama, Japan

Tomohiro Nishio