| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a polyimide molding having high productivity, by improving physical properties of much outgas in a high water absorption ratio of a pyromellitic acid polyimide powder molding containing a pyromellitic acid component and a 4,4'-diaminodiphenyle ether, low chemical resistance and dimensional stability. SOLUTION: The method for manufacturing the polyimide molding by CIP molding or the like comprises a step of molding the polyimide resin powder obtained by polymerizing a 3,3',4,4'-biphenyltetracarboxylic acid, its acid ester or its acid dianhydride and 2,3,3',4'-biphenyltegtracarboxylic acid, its acid ester or its acid dianhydride and a p-phenylenediamine by a pressure of about 3,000 to 5,000 kgf/cm2; and then a step of baking the powder at about 460 to 550 deg.C at a low pressure. In this case, the polyimide molding is formed by the method with a density of the molding of a range of 1.28 to 1.34 g/cm3. |
