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1. 发明申请

US20230087492A1 CARBON FIBER, MANUFACTURING METHOD THEREOF, AND CARBON FIBER COMPOSITE MATERIAL 有权
公开(公告)号：US20230087492A1
公开(公告)日：2023-03-23
申请号：US17801834
申请日：2021-03-05
申请人： TORAY Industries, Inc.
发明人： Fumihiko TANAKA , Yuki SUGA
IPC分类号： D01F9/22 , D01F6/18
摘要： Provided is a carbon fiber with a strand modulus of elasticity from 240 to 300 GPa, an elongation of 2.65% or more, and a strain energy density of 95 J/mm3 or more, which can improve the impact resistance of carbon fiber composite materials.

2. 发明申请

US20210079563A1 CARBON FIBER AND METHOD OF MANUFACTURING SAME 有权
公开(公告)号：US20210079563A1
公开(公告)日：2021-03-18
申请号：US16975435
申请日：2019-03-05
申请人： TORAY INDUSTRIES, INC.
发明人： Haruki OKUDA , Fumihiko TANAKA
IPC分类号： D01F9/22
摘要： A carbon fiber includes single fibers having lengths of 10 cm or less, a fiber axis of each single fiber having an undulation width of 2.5 μm or more when a part thereof between two points with a straight-line distance of 1 mm is observed from a lateral direction, and a coefficient of variation in the undulation width being 100% or less. A method of producing carbon fiber production includes performing stabilization treatment of a precursor fiber bundle for polyacrylonitrile based carbon fiber, performing pre-carbonization treatment, and performing carbonization treatment in this order, followed by cutting the resulting carbon fiber bundle in the form of continuous fiber to a single fiber length of 10 cm or less, the twist count of the fiber bundle during the carbonization treatment step being 16 turns/m or more.

3. 发明公开

US20240229304A9 CARBON FIBER BUNDLE AND PRODUCTION METHOD FOR SAME 审中-公开
公开(公告)号：US20240229304A9
公开(公告)日：2024-07-11
申请号：US18573812
申请日：2022-07-20
申请人： TORAY INDUSTRIES, INC.
发明人： Kiminori ONO , Yuki SADO , Fumihiko TANAKA , Masahiro MATSUMOTO
IPC分类号： D01F9/22
CPC分类号： D01F9/22 , D10B2101/12
摘要： To provide a carbon fiber bundle capable of suppressing winding due to ring-shaped fuzzes, which occurs when the carbon fiber bundle is rolled out for advanced processing, and a production method for producing the same. Disclosed is a carbon fiber bundle wherein an average single-fiber diameter B is 6.9 to 11.0 μm, a tensile modulus E of resin-impregnated strands is 230 to 310 GPa, the number of fuzzes inherent in the carbon fiber bundle is 40 fuzzes/m or less, and a proportion of fuzzes with a structure having a difference between skin and core is 1 to 25% of fuzzes inherent in the carbon fiber bundle. Such a carbon fiber bundle is preferably obtained by a method including, in a process of heat-treating a polyacrylonitrile-based precursor fiber bundle with a single-fiber fineness of 0.9 to 2.2 dtex in an oxidizing atmosphere at 200 to 300° C., heat-treating the polyacrylonitrile-based precursor fiber bundle so that a heat generation rate Q, which is the left side of the formula (3), is 150 to 500 J/m2/s until the density is 1.22 to 1.24 g/cm3, when q (J/g/s) is the heat generation rate of the single fiber, N is the number of filaments, d (dtex) is a single-fiber fineness of the stabilized fiber bundle and W (mm) is a yarn width, heat-treating the fiber bundle while applying a tension of 1.6 to 4.0 mN/dtex until the density is 1.38 to 1.50 g/cm3 to obtain a stabilized fiber bundle, and heat-treating the stabilized fiber bundle in an inert atmosphere at 1,200 to 1,600° C.

Q=q×N×d/W/10 (3)

4. 发明公开

US20240166840A1 MOLDING MATERIAL AND MOLDED ARTICLE 审中-公开
公开(公告)号：US20240166840A1
公开(公告)日：2024-05-23
申请号：US17773119
申请日：2020-11-04
申请人： TORAY INDUSTRIES, INC.
发明人： Haruki OKUDA , Jun WATANABE , Fumihiko TANAKA
IPC分类号： C08K3/04 , C08K7/06
CPC分类号： C08K3/04 , C08K7/06
摘要： The present invention aims to provide a resin composition that is high in moldability in producing a member of a complicated shape by injection molding and also high in flexural modulus and impact property. A molding material including a resin composition containing a thermoplastic resin and carbon fibers, wherein the carbon fibers have substantially the same length as the length of the molding material; the twist angle of the carbon fiber surface layer is 2.0° to 30.5°; the core ratio A/(A+B) is 0.1 to 0.5 where A is the areal fraction of the core portion containing carbon fibers and B is the areal fraction of the remaining portion, that is, the sheath portion, in a cross section perpendicular to the carbon fiber axis direction in the molding material; and the areal void fraction in a cross section perpendicular to the carbon fiber axis direction in the molding material is 5% or less.

5. 发明公开

US20240133081A1 CARBON FIBER BUNDLE AND PRODUCTION METHOD FOR SAME 审中-公开
公开(公告)号：US20240133081A1
公开(公告)日：2024-04-25
申请号：US18573812
申请日：2022-07-19
申请人： TORAY INDUSTRIES, INC.
发明人： Kiminori ONO , Yuki SADO , Fumihiko TANAKA , Masahiro MATSUMOTO
IPC分类号： D01F9/22
CPC分类号： D01F9/22 , D10B2101/12
摘要： To provide a carbon fiber bundle capable of suppressing winding due to ring-shaped fuzzes, which occurs when the carbon fiber bundle is rolled out for advanced processing, and a production method for producing the same. Disclosed is a carbon fiber bundle wherein an average single-fiber diameter B is 6.9 to 11.0 μm, a tensile modulus E of resin-impregnated strands is 230 to 310 GPa, the number of fuzzes inherent in the carbon fiber bundle is 40 fuzzes/m or less, and a proportion of fuzzes with a structure having a difference between skin and core is 1 to 25% of fuzzes inherent in the carbon fiber bundle. Such a carbon fiber bundle is preferably obtained by a method including, in a process of heat-treating a polyacrylonitrile-based precursor fiber bundle with a single-fiber fineness of 0.9 to 2.2 dtex in an oxidizing atmosphere at 200 to 300° C., heat-treating the polyacrylonitrile-based precursor fiber bundle so that a heat generation rate Q, which is the left side of the formula (3), is 150 to 500 J/m2/s until the density is 1.22 to 1.24 g/cm3, when q (J/g/s) is the heat generation rate of the single fiber, N is the number of filaments, d (dtex) is a single-fiber fineness of the stabilized fiber bundle and W (mm) is a yarn width, heat-treating the fiber bundle while applying a tension of 1.6 to 4.0 mN/dtex until the density is 1.38 to 1.50 g/cm3 to obtain a stabilized fiber bundle, and heat-treating the stabilized fiber bundle in an inert atmosphere at 1,200 to 1,600° C.

Q=q×N×d/W/10 (3)

6. 发明申请

US20220282058A1 RESIN COMPOSITION AND MOLDED ARTICLE 有权
公开(公告)号：US20220282058A1
公开(公告)日：2022-09-08
申请号：US17637912
申请日：2020-08-27
申请人： TORAY INDUSTRIES, INC.
发明人： Haruki OKUDA , Fumihiko TANAKA , Jun WATANABE
IPC分类号： C08K3/04 , C08K7/06
摘要： Provided is a resin composition including carbon fibers and a thermoplastic resin, in which the carbon fibers have a tensile elastic modulus E of 350 to 500 GPa, and the tensile elastic modulus E (GPa) and a loop fracture load A (N) satisfy the relationship of A≥−0.0017×E+1.02. This resin composition not only has a high moldability into a member of a complex shape by injection molding, but also can yield a molded article having excellent flexural modulus and excellent impact characteristics.

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