Abstract: There is disclosed a conductive resin film comprising a conductive substrate layer and a low-resistance layer with a volume resistance of 0.1 to 1.0 ?cm including a fine carbon fiber and a resin in a thickness direction on at least one of its outermost layer. This film exhibits good conductivity even with a low mixing rate of the conductive material and good acid resistance.

Abstract: The present invention provides a thermoplastic-resin film and a thermoplastic-resin laminate film which have excellent conductivity and are further excellent in water vapor barrier properties and/or tackiness. As an example, a conductive thermoplastic-resin film is provided which comprises a mixture of a thermoplastic resin and a conductive material and having a volume resistivity, as measured by the four-probe method in accordance with JIS K-7194, of 10 ?·cm or lower and a moisture permeability, as measured at a film thickness of 100 ?m by JIS K-7129 method B in an atmosphere of 40° C. and a relative humidity (RH) of 90%, of 10 g/(m2·24 hr) or lower.

Abstract: A fuel cell separator comprises a resin conductive layer as a mixture of a resin and a conductive filler at least on one side of a metal substrate, wherein the resin conductive layer comprises (a) a first resin layer having a volume resistance of 1.0 ?·cm or less and (b) at least one of a second resin layer constituting the surface of the resin conductive layer and having a volume resistance smaller than that of the first resin layer and a third resin layer formed in an interface with the metal substrate and having a volume resistance smaller than that of the first resin layer. The separator is excellent in current collecting performance, formability, strength and corrosion resistance as a fuel cell separator, especially as a separator for a solid polymer electrolyte fuel cell.

Abstract: There is disclosed a conductive resin film comprising a conductive substrate layer and a low-resistance layer with a volume resistance of 0.1 to 1.0 ?cm including a fine carbon fiber and a resin in a thickness direction on at least one of its outermost layer. This film exhibits good conductivity even with a low mixing rate of the conductive material and good acid resistance.