Abstract: A rubber gasket to be disposed in a compressed state between separators of a fuel cell includes a sealing portion having a sectional shape of a two-projection structure with a first projection having a curved slope of a first curvature radius (D), and a second projection provided on the first projection and having a second curvature radius (H). A pedestal portion extends in a horizontal direction with a predetermined thickness continuously from a foot portion of the curved slope of the first projection and has a flat bottom surface.

Abstract: The invention relates to a rubber gasket to be disposed in a compressed state between separators of a fuel cell, which comprises: a sealing portion having a sectional shape of a two-projection structure comprising: a first projection having a curved slope of a first curvature radius D; and a second projection provided on the first projection and having a second curvature radius H; and a pedestal portion that extends in a horizontal direction with a predetermined thickness continuously from a foot portion of the curved slope of the first projection and has a flat bottom surface.

Abstract: A raw material including SiO2, MgO and TiO2, as essential components, is melt by heating at 1700 to 2000° C. The melt is fiberized by quenching in order to obtain inorganic fiber. The obtained inorganic fiber includes SiO2, MgO and TiO2 as essential components and an amorphous portion having these components in its structure.

Abstract: The invention provides an inorganic fiber comprising SiO2, MgO and a manganese oxide as essential components, and having an amorphous portion comprising these essential components in its structure.

Abstract: The present invention provides a resin composition which can contain a large amount of a filler, has excellent moldability, can provide a molded product having both high electrical conductivity and mechanical strength, and is especially useful for a fuel cell separator and a sealing material. The resin composition comprises A) 100 parts by weight of a resin composed of 0 to 99 parts by weight of an epoxy resin and 1 to 100 parts by weight of a polyimide resin, with the proviso that the total amount of the epoxy resin and the polyimide resin is 100 parts by weight, and B) 40 to 900 parts by weight of at least one filler selected from the group consisting of graphite, ketjen black, acetylene black, furnace carbon black and thermal carbon black.

Abstract: The present invention provides a resin composition which can contain a large amount of a filler, has excellent moldability, can provide a molded product having both high electrical conductivity and mechanical strength, and is especially useful for a fuel cell separator and a sealing material. The resin composition comprises A) 100 parts by weight of a resin composed of 0 to 99 parts by weight of an epoxy resin and 1 to 100 parts by weight of a polyimide resin, with the proviso that the total amount of the epoxy resin and the polyimide resin is 100 parts by weight, and B) 40 to 900 parts by weight of at least one filler selected from the group consisting of graphite, ketjen black, acetylene black, furnace carbon black and thermal carbon black.

Abstract: A raw material including SiO2, MgO and TiO2, as essential components, is melt by heating at 1700 to 2000° C. The melt is fiberized by quenching in order to obtain inorganic fiber. The obtained inorganic fiber includes SiO2, MgO and TiO2 as essential components and an amorphous portion having these components in its structure.