The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2012
Filed:
Oct. 08, 2004
Naoki Nishiura, Moriyama, JP;
Takashi Kuraoka, Moriyama, JP;
Naoyuki Maruichi, Moriyama, JP;
Tsutomu Yoshida, Moriyama, JP;
Junya Kanetake, Moriyama, JP;
Toru Murakami, Ube, JP;
Naoki Nishiura, Moriyama, JP;
Takashi Kuraoka, Moriyama, JP;
Naoyuki Maruichi, Moriyama, JP;
Tsutomu Yoshida, Moriyama, JP;
Junya Kanetake, Moriyama, JP;
Toru Murakami, Ube, JP;
Gunze Limited, Kyoto, JP;
UBE Industries, Ltd., Yamaguchi, JP;
Abstract
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.