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. 19, 2023
Filed:
Apr. 10, 2019
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Haruki Okuda, Ehime, JP;
Naohiro Matsumoto, Ehime, JP;
Yuki Sada, Ehime, JP;
Fumihiko Tanaka, Ehime, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/04 (2006.01); C08K 7/06 (2006.01); D01F 9/22 (2006.01); C08J 5/24 (2006.01);
U.S. Cl.
CPC ...
C08K 3/04 (2013.01); C08J 5/243 (2021.05); C08K 7/06 (2013.01); D01F 9/22 (2013.01); C08J 2363/00 (2013.01);
Abstract
A carbon fiber bundle has a relationship among a crystallite size Lc (nm), a single-fiber compressive strength Fc (GPa) measured by a compressive fragmentation method of single-fiber composites, and an initial modulus E(GPa) in a resin-impregnated strand tensile test simultaneously satisfies formulas (1) to (3), and Lc is 4.00 nm or less:≥1.3×10/−0.3  (1)≤80×+155  (2)≥330  (3).