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Patent Searching and Data


Title:
POLYBENZAZOLE FILM AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/026947
Kind Code:
A1
Abstract:
Production of a heat-resistant polymer film of high peel strength that excels in a balance of lengthwise and crosswise strengths. In particular, a polybenzazole film is produced through a process comprising extruding a rigid polymer solution of 1 to 1.3 times the optically anisotropic lower limit solution concentration C2 through irrotational die, subsequently effecting biaxial drawing of the resultant film-shaped rigid polymer solution, solidifying the same in a coagulation bath, removing the solvent with a washing liquid, and removing the washing liquid.

Inventors:
MURASE HIROKI (JP)
TERAMOTO YOSHIHIKO (JP)
WATANUKI SEIJI (JP)
Application Number:
PCT/JP2003/011862
Publication Date:
April 01, 2004
Filing Date:
September 17, 2003
Export Citation:
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Assignee:
TOYO BOSEKI (JP)
MURASE HIROKI (JP)
TERAMOTO YOSHIHIKO (JP)
WATANUKI SEIJI (JP)
International Classes:
C08J5/18; B29C48/08; B29C48/305; B29C55/00; B29C55/12; B29D7/01; (IPC1-7): C08J5/18; B29C47/00; B29C55/12
Domestic Patent References:
WO1984001160A11984-03-29
Foreign References:
JP2003012851A2003-01-15
Other References:
SONG H H, HONG S-K: "PREPARATION OF RIGID-ROD POLY(P-PHENYLENE BENZOBISTHIAZOLE) FILMS OF SINGLE CRYSTALLINE TEXTURE", POLYMER, vol. 38, no. 16, August 1997 (1997-08-01), pages 4241 - 4245, XP004081567
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