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. 16, 2024
Filed:
Aug. 15, 2019
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Naomasa Matsuyama, Chiyoda-ku, JP;
Yuutarou Nakamura, Chiyoda-ku, JP;
Norifumi Hirota, Chiyoda-ku, JP;
Hiroko Matsumura, Chiyoda-ku, JP;
Katsuhiko Ikeda, Chiyoda-ku, JP;
Kouki Wakabayashi, Chiyoda-ku, JP;
Tadashi Ootani, Chiyoda-ku, JP;
Akihiro Itou, Chiyoda-ku, JP;
Kenji Hirano, Chiyoda-ku, JP;
Akito Hatayama, Chiyoda-ku, JP;
Kenji Kaneta, Chiyoda-ku, JP;
Atsushi Nakajima, Chiyoda-ku, JP;
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Abstract
A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.