US Patent Issued to TORAY INDUSTRIES on March 4 for "Carbon fiber bundle and production method thereof" (Japanese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,181, issued on March 4, was assigned to TORAY INDUSTRIES Inc. (Tokyo).

"Carbon fiber bundle and production method thereof" was invented by Ayanobu Horinouchi (Otsu, Japan), Fumitaka Watanabe (Otsu, Japan) and Yuuki Okishima (Ehime, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of producing a carbon fiber bundle suppresses penetration of a process oil agent into the fiber surface layer and suppresses adhesion between fibers and the generation of surface voids, and also provides a carbon fiber bundle. The carbon fiber bundle is characterized by having a crystallite size of 3.0 nm or less as measured by wide-angle X-ray diffraction, con...