Abstract: A gasket material including: a metal plate; and a fluorine rubber layer having a Vickers hardness of 15 to 30 N/mm2, being provided on one side or both sides of the metal plate, and obtained from a fluorine rubber composition containing a fluorine rubber polymer. The gasket material maintains a sealing bead surface at a high surface pressure without changing the engine block design and the gasket design and also possible to absorb flange surface roughness that is an original purpose of the rubber layer.

Abstract: The present invention relates to a gasket material including: a metal plate; and a fluorine rubber layer having a Vickers hardness of 15 to 30 N/mm2, being provided on one side or both sides of the metal plate, and being obtained from a fluorine rubber composition containing a fluorine rubber polymer. According to the gasket material, it is possible to maintain a sealing bead surface at a high surface pressure without changing the engine block design and the gasket design and also possible to absorb flange surface roughness that is an original purpose of the rubber layer.

Abstract: The present invention provides a separator for fuel cell containing: a flat plate member; a gas passage-side member provided on one side of the flat plate member and having passages for passing a reactant gas therethrough; and a cooling water passage-side member provided on the other side of the flat plate member and having passages for passing cooling water therethrough, wherein the gas passage-side member and the cooling water passage-side member are formed from first and second conductive resin compositions which are different from each other, respectively, and the difference between the thermal expansion coefficient of the gas passage-side member in its thickness direction and the thermal expansion coefficient of the cooling water passage-side member in a direction perpendicular to its thickness direction is 25×10?6 /K or smaller, and wherein the flat plate member contains at least one of the first and second conductive resin compositions.

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: A separator for fuel cells, comprising: a conductive filler comprising expanded graphite; a binder; and carbon fibers, wherein the separator has a deflection in flexure at break of 1 mm or larger, a modulus in flexure of 10 GPa or lower, and a flexural strength of 30 MPa or higher, each as examined at 100° C.

Abstract: The present invention provides a fuel cell separator containing an electroconductive resin composition, wherein the electroconductive resin composition is produced from a mixture containing: a thermosetting resin containing an epoxy resin; a curing agent; a curing accelerator; and a carbon material containing an expanded graphite, wherein the electroconductive resin composition has an elution characteristic so that a dipping water after dipping the electroconductive resin composition for 500 hours at 90° C., in which the volume of the dipping water is 1 cm3 with respect to the weight of the electroconductive resin composition of 5.1 g, has an electroconductivity of 50 ?S/cm or less.

Abstract: The present invention provides a separator for fuel cell containing: a flat plate member; a gas passage-side member provided on one side of the flat plate member and having passages for passing a reactant gas therethrough; and a cooling water passage-side member provided on the other side of the flat plate member and having passages for passing cooling water therethrough, wherein the gas passage-side member and the cooling water passage-side member are formed from first and second conductive resin compositions which are different from each other, respectively, and the difference between the thermal expansion coefficient of the gas passage-side member in its thickness direction and the thermal expansion coefficient of the cooling water passage-side member in a direction perpendicular to its thickness direction is 25×10?6 /K or smaller, and wherein the flat plate member contains at least one of the first and second conductive resin compositions.

Abstract: The present invention provides a separator for fuel cell formed from a conductive resin composition, wherein the difference between the thermal expansion coefficient of the separator for fuel cell in the thickness direction and that in a direction perpendicular to the thickness direction is 20×10?6 K?1 or smaller, a forming material of a separator for fuel cell and a process for producing a separator for fuel cell.

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 decanter type centrifugal separator capable of discharging sludge directly from a portion of the sludge with least moisture content in a bowl so as to lower a moisture content and increase a separation efficiency, wherein a screw conveyor rotated with a difference in speed provided relative to the bowl is stored in the bowl rotated at a high speed, a dewatering cake discharge route (20) is provided in one end wall (2) of the bowl, an opening (20a) of the route into the bowl is provided near the inner peripheral wall of the bowl, the discharge route provides a restriction effect to the discharge of the dewatering cake, and a sedimentary layer with thick sedimentation layer is formed near the opening, whereby that portion only of the cake is discharged through the discharge route under head press of the sedimentation layer, that portion receiving the highest consolidation effect by the head press of a centrifugal force acting on the sediment, among the sedimentation layers accumulated at one end of the bowl.

Abstract: A decanter type centrifugal separator capable of discharging sludge directly from a portion of the sludge with least moisture content in a bowl so as to lower a moisture content and increase a separation efficiency, wherein a screw conveyor rotated with a difference in speed provided relative to the bowl is stored in the bowl rotated at a high speed, a dewatering cake discharge route (20) is provided in one end wall (2) of the bowl, an opening (20a) of the route into the bowl is provided near the inner peripheral wall of the bowl, the discharge route provides a restriction effect to the discharge of the dewatering cake, and a sedimentary layer with thick sedimentation layer is formed near the opening, whereby that portion only of the cake is discharged through the discharge route under head press of the sedimentation layer, that portion receiving the highest consolidation effect by the head press of a centrifugal force acting on the sediment, among the sedimentation layers accumulated at one end of the bowl.