公开(公告)号：US20250091315A1

公开(公告)日：2025-03-20

申请号：US18580842

申请日：2022-07-25

Applicant: TORAY INDUSTRIES, INC.

Inventor： Takuya YAMANE ,  Takashi OCHI

IPC: B32B5/12 ,  B32B5/02 ,  B32B7/02

Abstract: [Problem] A problem to be addressed by the present invention is to provide a CFRP with a low risk of edge glow by virtue of controlling the structure of the CFRP and without relying on expensive electroconductive particles. In other words, provided is a CFRP such that the risk of edge glow is greatly decreased, even in a case where electroconductive particles are used in an amount equal to or smaller than in a conventional technology. Further provided is a CFRP such that the risk of edge glow is greatly decreased without using electroconductive particles.
[Solution] A carbon-fiber-reinforced composite material including carbon fiber sheets containing unidirectionally arranged carbon fibers, laminated multidirectionally one on another, and impregnated with a matrix resin, which is cured; wherein, assuming that a region in which the carbon fibers have the same angle of fiber orientation consecutively in the thickness direction is defined as a Layer, and that, when the Layer is composed of a plurality of regions having a given thickness, and having different carbon fiber volume content factors (Vcf), each of the regions having a given thickness is defined as a Sublayer, the carbon fiber sheet contains a specific Layer that satisfies (1) to (3), and the thickness of a resin portion between the specific Layer and at least one Layer adjacent to the specific Layer is 5 μm or less; (1) the average Vcf of the Layer (hereinafter referred to as the Layer average Vcf) is 50% or more, (2) as both outermost parts of the Layer, Sublayers each having a Vcf the ratio of which to the Layer average Vcf is 0.5 or more (hereinafter, such a Sublayer is referred to as a high-Vcf Sublayer) are disposed, wherein each average Vcf is higher than the Layer average Vcf, and (3) between the high-Vcf Sublayers as both outermost parts of the Layer, a Sublayer having a Vcf the ratio of which to the Layer average Vcf is less than 0.5 (hereinafter, such a Sublayer is referred to as a low-Vcf Sublayer) exists.

公开(公告)号：US20230339222A1

公开(公告)日：2023-10-26

申请号：US18010644

申请日：2021-06-25

Applicant: TORAY INDUSTRIES, INC.

Inventor： Takashi OCHI ,  Yoshikazu KONO

IPC: B32B27/20 ,  B32B27/12 ,  B32B38/08 ,  B32B33/00 ,  B32B1/00 ,  B32B37/20 ,  B32B38/00 ,  B32B27/08

CPC classification number: B32B27/20 ,  B32B27/12 ,  B32B38/08 ,  B32B33/00 ,  B32B1/00 ,  B32B37/20 ,  B32B38/0004 ,  B32B27/08 ,  B32B2264/108 ,  B32B2264/303 ,  B32B2307/202 ,  B32B2305/076 ,  B32B2038/0076 ,  B32B2262/106

Abstract: A fiber-reinforced composite material including reinforcing fiber layers and a resin layer sandwiched therebetween, wherein conductive particles having a sphericity of 85% or more are disposed in the resin layer, and the fiber-reinforced composite material has a portion where upper and lower reinforcing fiber layers are connected by one conductive particle and has a portion where a conductive particle is sunk in a reinforcing fiber layer. Provided is a fiber-reinforced composite material having sufficient electrical conductivity in a thickness direction with a small addition amount of conductive particles.

公开(公告)号：US20240158592A1

公开(公告)日：2024-05-16

申请号：US18281603

申请日：2022-04-25

Applicant: TORAY INDUSTRIES, INC.

Inventor： Ryohei WATARI ,  Takashi OCHI ,  Yoshikazu KONO ,  Atsuki SUGIMOTO

IPC: C08J5/24 ,  C08J5/18

CPC classification number: C08J5/243 ,  C08J5/18 ,  C08J2300/22 ,  C08J2363/00

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.

公开(公告)号：US20200010633A1

公开(公告)日：2020-01-09

申请号：US16491050

申请日：2018-03-05

Applicant: TORAY INDUSTRIES, INC.

Inventor： Junichi AOKI ,  Koji FURUKAWA ,  Atsuhito ARAI ,  Jun MISUMI ,  Hiroaki SAKATA ,  Takashi OCHI

IPC: C08J5/24 ,  C08L63/00

Abstract: An object of the present invention is to provide an epoxy resin composition capable of providing a carbon fiber-reinforced composite material that is excellent in moldability, heat resistance, and mechanical properties such as tensile strength and compression strength, and a prepreg. The present invention provides an epoxy resin composition containing at least components [A] to [D] shown below: [A]: an epoxy resin having a xylene group; [B]: a glycidyl amine epoxy resin having three or more glycidyl groups in a molecule; [C]: a thermoplastic resin; and [D]: an aromatic polyamine, the epoxy resin composition containing 10 to 80 parts by mass of the component [A] and 20 to 90 parts by mass of the component [B] based on 100 parts by mass in total of epoxy resins, and also 1 to 25 parts by mass of the component [C] based on 100 parts by mass in total of epoxy resins.