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1. WO1996004415 - METHOD FOR PREPARING POLYBENZOXAZOLE OR POLYBENZOTHIAZOLE FIBERS

Publication Number WO/1996/004415
Publication Date 15.02.1996
International Application No. PCT/US1995/003895
International Filing Date 29.03.1995
Chapter 2 Demand Filed 25.01.1996
IPC
D01D 5/06 2006.01
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
5Formation of filaments, threads, or the like
06Wet spinning methods
D01F 6/74 2006.01
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
FCHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
6Monocomponent man-made filaments or the like of synthetic polymers; Manufacture thereof
58from homopolycondensation products
74from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
CPC
D01D 5/06
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
5Formation of filaments, threads, or the like
06Wet spinning methods
D01F 6/74
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
6Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
58from homopolycondensation products
74from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
Applicants
  • THE DOW CHEMICAL COMPANY [US/US]; 2030 Dow Center, Abbott Road Midland, MI 48640, US
Inventors
  • FALEY, Timothy, L.; US
  • MILLS, Michael, E.; US
  • TERAMOTO, Yoshihiko; JP
  • TUREK, Douglas, E.; US
  • YABUKI, Kazuyuki; JP
Agents
  • SHEPHERD, Philip, D.; The Dow Chemical Company Patent Dept. P.O. Box 1967 Midland, MI 48641-1967, US
Priority Data
08/286,29705.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR PREPARING POLYBENZOXAZOLE OR POLYBENZOTHIAZOLE FIBERS
(FR) PROCEDE POUR PREPARER DES FIBRES DE POLYBENZOXAZOLE OU DE POLYBENZOTHIAZOLE
Abstract
(EN)
In a process for preparing polybenzoxazole or polybenzothiazole filaments by extruding a polybenzoxazole or polybenzothiazole dope, drawing the dope filament across an air gap, and coagulating the dope filament; the number of filament breaks can be reduced by placing a stress isolation device after extruding but before coagulating the filament.
(FR)
Dans un procédé pour préparer des filaments de polybenzoxazole ou de polybenzothiazole par extrusion d'une solution à filer de polybenzoxazole ou de polybenzothiazole, étirage du filament de solution dans une lame d'air et coagulation de ce filament, il est possible de réduire le nombre de ruptures de filament en plaçant, en aval de l'extrusion mais en amont de la coagulation du filament, un dispositif de protection contre les contraintes.
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