摘要 |
<p>A process for producing a high-quality nonconductive or semiconductive endless (jointless) tubular polyimide film simply and efficiently with high economy, etc. In particular, there is provided a nonconductive or semiconductive endless tubular polyimide film constituted of a polyimide produced from a component of aromatic diamine and a component of two or more aromatic tetracarboxylic acids composed of 15 to 55 mol% of asymmetric aromatic tetracarboxylic acid ingredient and 85 to 45 mol% of symmetric aromatic tetracarboxylic acid ingredient, wherein a given amount of carbon black is dispersed according to necessity, and there are further provided a process for producing the same, etc.</p> |
申请人 |
GUNZE LIMITED;UBE INDUSTRIES, LTD.;NISHIURA, NAOKI;KURAOKA, TAKASHI;MARUICHI, NAOYUKI;YOSHIDA, TSUTOMU;KANETAKE, JUNYA;MURAKAMI, TORU |
发明人 |
NISHIURA, NAOKI;KURAOKA, TAKASHI;MARUICHI, NAOYUKI;YOSHIDA, TSUTOMU;KANETAKE, JUNYA;MURAKAMI, TORU |