公开(公告)号：US20220403587A1

公开(公告)日：2022-12-22

申请号：US17775630

申请日：2021-01-19

Applicant: TORAY INDUSTRIES, INC.

Inventor： Takayuki YOMO ,  Misato TAKENAKA ,  Haruki OKUDA ,  Masanori SUEOKA ,  Yoshimasa SUZUKI

IPC: D06M15/53 ,  D06M13/342 ,  D06M13/328 ,  D06M13/262

Abstract: [Problem] To provide a sizing-agent-coated carbon fiber bundle in which, even when the sizing-agent-coated carbon fiber bundle has superior handling properties, the sizing agent on the sizing-agent-coated carbon fiber bundle exhibits excellent solubility in water and the adhesion amount of remaining sizing agent is reduced. [Solution] A sizing-agent-coated carbon fiber bundle obtained by applying polyethylene glycol and/or a surfactant to a carbon fiber bundle as a sizing agent, wherein all of the following conditions (i)-(iii) are satisfied. (i) The adhesion amount of the sizing agent is 0.15-0.80 parts by mass (inclusive) per 100 mass parts of the sizing-agent-coated carbon fiber bundle 100. (ii) The dry F-F friction coefficient is 0.39 or less. (iii) The adhesion amount of the sizing agent after washing for 50 seconds under the conditions disclosed in the specification is 0.12 parts by mass or less per 100 parts by mass of the sizing-agent-coated carbon fiber bundle 100.