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:
Apr. 03, 1990
Filed:
Sep. 28, 1988
Applicant:
Inventors:
Kouzi Soga, Iwakuni, JP;
Nobuo Taneda, Iwakuni, JP;
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D01F / ;
U.S. Cl.
CPC ...
264 41 ; 264102 ; 2642091 ; 264187 ; 264203 ; 26421111 ; 26421116 ; 26421122 ; 26421123 ; 264349 ; 21050030 ; 21050031 ;
Abstract
A process for the preparation of a porous hollow filament composed mainly of an organic polymer, which comprises separately feeding a powder of the organic polymer and a liquid additive to a feed zone of twin-screw extruder, mixing the polymer with the additive in a kneading zone of the extruder to form a substantially liquid mixture, further kneading and compressing the liquid in a kneading and compressing zone of the extruder, feeding the liquid to an extruding zone of the extruder, and extruding the liquid from the extruding zone.