FABRICATION OF A ROLL OF A GRAPHITE FILM BASED ON A ROLLED POLYIMIDE FILM

摘要

A process of fabricating a graphite film includes providing a roll of a polyimide film, applying a first thermal treatment so that the roll of the polyimide film is carbonized to form a roll of a carbon film, and applying a second thermal treatment so that the roll of the carbon film is converted to a roll of a graphite film. The rolled polyimide film has a thickness between 10 μm and 150 μm, and includes polyimide derived from reaction of diamine monomers with dianhydride monomers, the dianhydride monomers including pyromellitic dianhydride (PMDA), the diamine monomers including 4,4′-oxydianiline (4,4′-ODA) and phenylenediamine (PDA) with a ODA:PDA diamine molar ratio being 50:50 to 80:20.