FABRICATION OF A GRAPHITE FILM BASED ON A ROLLED POLYIMIDE FILM

摘要

The purpose of the present invention provides a graphite film manufacturing process which is able to be implemented more easily, and is able to overcome at least a problem of breakage or fracture of a rolled polymer film during a carbonization process. The graphite film manufacturing process of the present invention comprises the steps of: providing a polyimide film roll; applying a first heat treatment operation to the polyimide film roll, thereby carbonizing the polyimide film roll to form a carbon film roll; and applying a second heat treatment operation to the carbon film roll to convert the carbon film roll into a graphite film roll. A rolled polyimide film has a thickness of 10 to 150 μm and includes a polyimide derived from a reaction of a diamine monomer and a dianhydride monomer, the dianhydride monomer includes pyromellitic dianhydride (PMDA), the diamine monomer includes 4,4′-oxydianiline (4,4′-ODA) and phenylenediamine (PDA), and a molar ratio of ODA to PDA is 50:50 to 80:20.