Invention Grant
- Patent Title: Endless tubular polyimide film
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Application No.: US10591326Application Date: 2004-10-08
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Publication No.: US08097693B2Publication Date: 2012-01-17
- Inventor: Naoki Nishiura , Takashi Kuraoka , Naoyuki Maruichi , Tsutomu Yoshida , Junya Kanetake , Toru Murakami
- Applicant: Naoki Nishiura , Takashi Kuraoka , Naoyuki Maruichi , Tsutomu Yoshida , Junya Kanetake , Toru Murakami
- Applicant Address: JP Kyoto JP Yamaguchi
- Assignee: Gunze Limited,UBE Industries, Ltd.
- Current Assignee: Gunze Limited,UBE Industries, Ltd.
- Current Assignee Address: JP Kyoto JP Yamaguchi
- Agency: Posz Law Group, PLC
- Priority: JP2004-059582 20040303; JP2004-059590 20040303; JP2004-059593 20040303; JP2004-112166 20040406
- International Application: PCT/JP2004/015309 WO 20041008
- International Announcement: WO2005/085324 WO 20050915
- Main IPC: C08G69/26
- IPC: C08G69/26

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.
Public/Granted literature
- US20070178264A1 Endless tubular polyimide film Public/Granted day:2007-08-02
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