CONDUCTIVE COMPOSITION FOR SOLID POLYMER TYPE FUEL CELL SEPARATOR, SOLID POLYMER TYPE FUEL CELL SEPARATOR, SOLID POLYMER TYPE FUEL CELL AND SOLID POLYMER TYPE FUEL CELL SYSTEM USING THE SEPARATOR

摘要

A conductive composition or the like useful for the production of a solid polymer type fuel cell separator. A solid polymer type fuel cell separator, which is currently made by forming grooves by cutting in a carbonaceous or graphite flat plate, poses a high-cost problem. A proposed method of making the separator by injection-molding or compression-molding a resin composition containing a conductive agent raises a problem of difficulty with which a molded product, that has a thickness of up to 2 mm and even portions further reduced in thickness by the presence of irregular portions and grooves, must be uniformly molded. The above problem has been resolved by using a composition, for the above composition, containing graphite particles 55-65 mu m in average diameter and thermoplastic resin and/or thermosetting resin at a weight ratio of 95/5 to 75/25 and having a melt viscosity at 320 DEG C of 100-5000 Pa.s.