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:
Mar. 08, 2022
Filed:
Apr. 10, 2020
Applicant:
Hpk Inc., Gyeonggi-do, KR;
Inventors:
Chang Hyun Cho, Gyeonggi-do, KR;
Chang Se Woo, Gyeonggi-do, KR;
Kap Seung Yang, Gwangju, KR;
Chang Ha Lim, Gyeonggi-do, KR;
Sun Ho Choe, Jeollabuk-do, KR;
Hong Min Kim, Jeollabuk-do, KR;
Kyung Ae Oh, Jeollabuk-do, KR;
Eun Ji Kim, Jeollabuk-do, KR;
Assignee:
HPK INC., Pyeongtaek-si, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01F 9/22 (2006.01); D01D 10/06 (2006.01); D01D 5/08 (2006.01);
U.S. Cl.
CPC ...
D01F 9/225 (2013.01); D01D 10/06 (2013.01); D01D 5/08 (2013.01);
Abstract
Provided is a method of producing a carbon fiber, the method including: a) adding an acrylonitrile-based polymer solution to a solution containing a glycol-based compound having a boiling point of 180 to 210° C. to precipitate an acrylonitrile-based polymer; b) melt spinning the acrylonitrile-based polymer to obtain a spun fiber; and c) performing stabilization and carbonization on the spun fiber to obtain a carbon fiber.