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. 15, 2026
Filed:
Apr. 25, 2022
Toray Industries, Inc., Tokyo, JP;
Ryohei Watari, Nagoya, JP;
Takashi Ochi, Iyo-gun, JP;
Yoshikazu Kono, Iyo-gun, JP;
Atsuki Sugimoto, Iyo-gun, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
A prepreg containing at least the following components [A] to [D], wherein the prepreg includes: a first layer in which the component [A] is impregnated with a first resin composition containing the components [B] and [C]; and a second layer that contains a second resin composition containing the components [B] to [D] and is formed on both surfaces of the first layer, and the first layer and the second layer are adjacent to each other, an average fiber diameter of a carbon fiber as the component [A] is 6 μm or more and 9 μm or less, and a content of a bifunctional amine type epoxy resin [B1] is 15 parts by mass or more and less than 40 parts by mass based on 100 parts by mass of a total amount of epoxy resin of the component [B]: [A] a carbon fiber; [B] an epoxy resin; [C] a curing agent; and [D] thermoplastic resin particles. The present invention provides a prepreg that is excellent in tensile strength, heat resistance, and impact resistance, and provides a carbon fiber composite material suitable as a structural material of an aircraft body, and is further excellent in impregnating property in the production of the prepreg and conveyance property of the prepreg in an automated lay-up device.