METHOD FOR PRODUCING AROMATIC POLYIMIDE RESIN MOLDED BODY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an aromatic polyimide resin molded body improved in mechanical properties (especially, tensile characteristics).SOLUTION: There is provided a method for producing an aromatic polyimide resin molded body which comprises the following two steps using a polyimide powder having an average particle diameter of 0.1 to 9μm and an imide ring closure ratio of 50 to 95%, which is a polyimide obtained by reacting a pyromellitic dianhydride and a 4,4'-diaminophenyl ether. (1) A first step of producing a green compact by a first stage in which a polyimide powder is subjected to pressurizing and heating treatment by applying a pressure of 29 to 147 MPa at 200 to 250°C to hold 40 minutes or more per a molding thickness of 10 mm and a second stage in which the polyimide powder is subjected to pressurizing and heating treatment by applying a pressure of 29 to 147 MPa at 350 to 450°C to hold 40 minutes or more per a molding thickness of 10 mm, and (2) a second step of heating the green compact obtained in the first step at 350 to 500°C under a vacuum condition or in an inert gas atmosphere.