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:
Sep. 16, 2014
Filed:
Jun. 02, 2010
In-sik Han, Daegu, KR;
Jae-young Lee, Daegu, KR;
Seung-hwan Lee, Gumi-si, KR;
Jae-young Kim, Gumi-si, KR;
So-yeon Kwon, Busan, KR;
In-Sik Han, Daegu, KR;
Jae-Young Lee, Daegu, KR;
Seung-Hwan Lee, Gumi-si, KR;
Jae-Young Kim, Gumi-si, KR;
So-Yeon Kwon, Busan, KR;
Kolon Industries, Inc., Kwacheon-Si, KR;
Abstract
Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized by comprising multi-stage injection of a coagulant with sulfuric acid concentration lowered sequentially stage by stage, to a spun material fed into a coagulant injection tank. The present invention enables increase of a spinning and take-up velocity without occurrence of thread cutting by uniformly and evenly coagulating surface and inside of the spun material. In addition, the present invention recovers the coagulant or water already used and reuses the recovered coagulant or water in the earlier stages, so that it has advantages of saving production costs and reducing environmental contamination. Accordingly, the wholly aromatic polyamide filament produced according to the present invention has high crystallinity X, large apparent crystal size ACS and reduced defects in the crystal itself, thereby exhibiting more improved physical properties such as strength and modulus.