| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductive polyamide-imide tubular film so improved that defects of physical characteristics (dimensional stability and flexing resistance), which are basic characteristics of the film, are eliminated and a polyamide-imide forming stock solution containing electrically-conductive carbon black has excellent storage stability (so that aged deterioration caused by separation after mixing and dispersion of the solution is prevented), and to provide a method for producing the film. <P>SOLUTION: This semiconductive polyamide-imide tubular film is formed out of a polyamide-imide having repeating units expressed by the formula (I) [Y<SP>1</SP>is expressed by the formula (II) (R<SP>1</SP>and R<SP>2</SP>are each H or a monovalent organic group) or the formula (III) (R<SP>3</SP>and R<SP>4</SP>are each H or a monovalent organic group), wherein the film contains the electrically-conductive carbon black. <P>COPYRIGHT: (C)2003,JPO |
