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:
May. 17, 2022
Filed:
Apr. 28, 2020
Applicant:
Mitsubishi Chemical Corporation, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D01F 9/12 (2006.01); D01D 5/253 (2006.01); D01F 6/38 (2006.01); D01F 9/22 (2006.01); B29C 70/44 (2006.01); C08J 5/04 (2006.01); D01D 5/096 (2006.01); C08J 5/24 (2006.01); B32B 37/14 (2006.01); F27D 7/00 (2006.01);
U.S. Cl.
CPC ...
D01F 9/12 (2013.01); B29C 70/44 (2013.01); B32B 37/14 (2013.01); C08J 5/042 (2013.01); C08J 5/24 (2013.01); D01D 5/096 (2013.01); D01D 5/253 (2013.01); D01F 6/38 (2013.01); D01F 9/225 (2013.01); F27D 7/00 (2013.01); C08J 2363/00 (2013.01); Y10T 428/26 (2015.01); Y10T 428/298 (2015.01); Y10T 442/3089 (2015.04);
Abstract
A method of producing a carbon fiber bundle is provided, involving performing a flame-proof treatment to a carbon-fiber-precursor acryl fiber bundle having a single-fiber fineness of 1.5 dtex or more and 5.0 dtex or less, and having a roundness of 0.7 or more and 0.9 or less in a cross-section shape perpendicular to a fiber axis of the single fiber to obtain a flame-proofed fiber bundle; and performing a carbonization treatment to the flame-proofed fiber bundle.