PURPOSE: To obtain highly oriented graphite having good quality for industrial use, with industrial advantage, by carbonizing aromatic polymer film after laminating or by laminating it after carbonizing, and further by graphitizing under mechanical pressure.
CONSTITUTION: Films of one or more kinds of aromatic polymers such as polyimide, polyoxadiazole are carbonized. The laminated films after carbonizing are graphitized under mechanical pressure, especially under pressure in the direction of laminated layer, to adhere the films each other. That is, the laminated films above-mentioned are heated above the graphitizing temp., especially at 3,100W3,700°C under ≥5kg/cm2, especially at 100W500kg/cm2, in a non-oxidative atmosphere with a machine capable of simultaneously pressing and heating. Thereby, the highly oriented and firmly integrated graphite of good quality is obtd. without destruction or consumption of the laminated material.
HISHIYAMA YUKIHIRO
MIWA YOSHIHIRO
KOMADA OSAMU
NATSUME ISAMU
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