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. 04, 1989
Filed:
Nov. 04, 1986
Japan Exlan Company Limited, Osaka, JP;
Abstract
A spinning solution of an acrylonitrile polymer is subjected to dry-wet spinning through an annular type spinneret having a non-perforated part, i.e. a part not formed with spinning orifices, extending from the outer periphery to the inner periphery. The spinneret has more than 3,000 spinning orifices, at the perforated part of the annular portion. The extruded fibers are then passed through a coagulation bath, and the coagulated fibers are then stretched. By this method, uniform acrylic fibers can be produced without causing quality unevenness and fiber defects due to uneven coagulation, filament agglutination, and fluctuation of the gap between spinneret lower surface and liquid surface of the coagulation bath.