| 摘要 |
PURPOSE:To obtain a polyimide resin tubular article having a large diameter by simple operation without revolution at high speed and lowering the viscosity of a solution by spreading the dope solution for molding over the inner wall of a cylindrical die by using a scraper. CONSTITUTION:A dope solution for molding consisting of a composition in which aromatic polyimide or an aromatic polyimide precursor dissolves in an organic polar solvent is spread over the inner wall of a cylindrical die by employing a scraper. The dope solution for molding is spread over the inner wall of a cylindrical die preferably having 5-5,000mm. length and an approximately 20-1,000mm. inner diameter by using the scraper while turning the cylindrical die, a coating preferably having approximately 50-5,000mum thickness is formed on said inner wall surface, and the coating is heated while rotating the cylindrical die and dried and solidified. The coating is heated and changed into an imide and/or the solvent is removed, thus obtaining a polyimide resin tubular article. |
