METHOD FOR MANUFACTURING FUEL-CELL SEPARATOR AND FUEL-CELL SEPARATOR

Provided is a method for manufacturing a fuel cell separator that exhibits excellent mechanical characteristics, electrical conductivity, and dimensional precision. The method includes a step wherein at least one of each of the following are layered together and compression molded: thermoplastic resin sheets (A) containing 130 to 3,200 parts by weight of a carbonaceous material per 100 parts by weight of a thermoplastic resin; and thermoplastic resin sheets (B) containing 3 to 280 parts by weight of a carbonaceous material per 100 parts by weight of a thermoplastic resin, 50% to 100% by weight of the carbonaceous material being fibrous carbon. The thermoplastic resin sheets (A and B), which start out 1 mm thick each, are compression molded for 60 seconds with a surface pressure of 20 MPa and at a temperature 60°C higher than the higher of the melting points of said two types of sheets such that the ratio between the final thickness (d) of the compressed first thermoplastic resin sheet(s) (A) and the final thickness (d) of the compressed second thermoplastic resin sheet(s) (B) satisfies the relation d/d≥ 2.