AROMATIC AMIC ACID COMPOSITION AND METHOD OF PREPARING THE SAME, AND ENDLESS TUBULAR POLYIMIDE FILM AND METHOD OF PREPARING THE SAME

摘要

The present invention provides a method for producing a high-quality nonconductive or semi-conductive seamless (jointless) tubular polyimide film in a simple, efficient, and economical manner, and the like. More specifically, the invention relates to an electrically non-conductive or electrically semi-conductive seamless tubular polyimide film comprising polyimide having at least two aromatic tetracarboxylic acid derivatives comprising 15 to 55 mol% of asymmetric aromatic tetracarboxylic acid component and 85 to 45 mol% of symmetric aromatic tetracarboxylic acid component and at least one aromatic diamine component, in which, as required, a specific amount of carbon black is dispersed, and relates to a method for producing the same.