Patents by Inventor Takuji Komukai
Takuji Komukai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11958948Abstract: A rotary member rotatable along a circumferential direction includes: carbon fibers wound in the circumferential direction; a matrix resin in which the carbon fibers are embedded; and a structure which includes a plurality of carbon nanotubes having a bent shape with a bent portion, forms a network structure including a contact portion where the carbon nanotubes are in direct contact with each other, and is provided on surfaces of the carbon fibers.Type: GrantFiled: November 30, 2021Date of Patent: April 16, 2024Assignee: NITTA CORPORATIONInventors: Takuji Komukai, Maki Onizuka
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Publication number: 20240052557Abstract: A composite material includes: a base material; a structure which includes a plurality of carbon nanotubes having a bent shape with a bent portion, forms a network structure including a contact portion where the carbon nanotubes are in direct contact with each other, and is provided on a surface of the base material; and a first sizing agent that is provided at least around the contact portion, and cross-links the carbon nanotubes which are in direct contact with each other by a carbodiimide-derived structure obtained by reaction between a functional group of the carbon nanotubes and a carbodiimide group.Type: ApplicationFiled: November 30, 2021Publication date: February 15, 2024Applicant: NITTA CORPORATIONInventors: Takuji Komukai, Maki Onizuka
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Patent number: 11898305Abstract: A method for producing a composite material, includes: immersing a carbon fiber bundle, including continuous carbon fibers, in a dispersion in which carbon nanotubes are dispersed in water, alcohol, or organic solvent; applying a tensile force to the carbon fibers, which are linearly arranged, using flat rollers; moving the carbon fibers linearly, under the tensile force by the flat rollers, at a constant depth inside the dispersion at a traveling speed of 1 to 20 m/min, such that the carbon nanotubes in the dispersion are adhered to respective surfaces of the carbon fibers; and applying a sizing agent to cover at least a part of the respective surfaces.Type: GrantFiled: October 10, 2022Date of Patent: February 13, 2024Assignee: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai, Daiki Ishii, Jun Inoi
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Publication number: 20230416474Abstract: A rotary member rotatable along a circumferential direction includes: carbon fibers wound in the circumferential direction; a matrix resin in which the carbon fibers are embedded; and a structure which includes a plurality of carbon nanotubes having a bent shape with a bent portion, forms a network structure including a contact portion where the carbon nanotubes are in direct contact with each other, and is provided on surfaces of the carbon fibers.Type: ApplicationFiled: November 30, 2021Publication date: December 28, 2023Applicant: NITTA CORPORATIONInventors: Takuji Komukai, Maki Onizuka
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Publication number: 20230304215Abstract: Provided are a composite material and a reinforced fiber. The composite material includes a fiber and a plurality of carbon nanotubes disposed on a surface of the fiber. The carbon nanotubes adhere directly to the surface of the fiber.Type: ApplicationFiled: May 4, 2023Publication date: September 28, 2023Inventors: Takuji Komukai, Maki Onizuka, Hiromi Teruhira, Katsuyuki Nakai
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Publication number: 20230045012Abstract: A method for producing a composite material, includes: immersing a carbon fiber bundle, including continuous carbon fibers, in a dispersion in which carbon nanotubes are dispersed in water, alcohol, or organic solvent; applying a tensile force to the carbon fibers, which are linearly arranged, using flat rollers; moving the carbon fibers linearly, under the tensile force by the flat rollers, at a constant depth inside the dispersion at a traveling speed of 1 to 20 m/min, such that the carbon nanotubes in the dispersion are adhered to respective surfaces of the carbon fibers; and applying a sizing agent to cover at least a part of the respective surfaces.Type: ApplicationFiled: October 10, 2022Publication date: February 9, 2023Applicant: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai, Daiki Ishii, Jun Inoi
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Publication number: 20230019296Abstract: A composite material includes a fiber and a structure including a plurality of carbon nanotubes and having a network structure in which the carbon nanotubes are in direct contact with each other and in which the carbon nanotubes directly adhere to a surface of the fiber. The carbon nanotubes have a bent shape including a bent portion.Type: ApplicationFiled: November 20, 2020Publication date: January 19, 2023Applicant: NITTA CORPORATIONInventors: Takuji Komukai, Maki Onizuka
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COMPOSITE MATERIAL, CARBON FIBER-REINFORCED MOLDED BODY, AND METHOD FOR PRODUCING COMPOSITE MATERIAL
Publication number: 20220411601Abstract: A composite material includes a carbon fiber bundle including a plurality of continuous carbon fibers; and a structure, formed on each of the carbon fibers, including a plurality of carbon nanotubes and having a network structure in which the carbon nanotubes are in direct contact with each other and in which the carbon nanotubes directly adhere to surfaces of the carbon fibers. The carbon nanotubes have a bent shape including a bent portion, and a thickness of the structure is within a range of 50 nm to 200 nm.Type: ApplicationFiled: November 18, 2020Publication date: December 29, 2022Applicant: NITTA CORPORATIONInventors: Takuji Komukai, Maki Onizuka -
Patent number: 11370192Abstract: A carbon fiber-reinforced molded article includes an arranged composite material and a cured resin product. The composite material includes a carbon fiber bundle and carbon nanotubes. The carbon fiber bundle is in which a plurality of continuous carbon fibers are arranged. The carbon nanotubes adhere to respective surfaces of the carbon fibers. A modulus of elasticity obtained by conducting a three-point bending test with a cushioning material is smaller than a modulus of elasticity obtained by conducting the three-point bending test without the cushioning material.Type: GrantFiled: February 9, 2018Date of Patent: June 28, 2022Assignee: NITTA CORPORATIONInventors: Maki Onizuka, Katsuyuki Nakai, Takuji Komukai, Hiromi Teruhira
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Patent number: 11370893Abstract: Provided are a composite material that adequately obtains the effect of carbon nanotubes, a prepreg in which the composite material is used, a carbon-fiber-reinforced molded article having greater resistance to the progression of the interlayer peeling crack, and a method for manufacturing the composite material. A composite material includes a carbon fiber bundle in which a plurality of continuous carbon fibers are arranged, carbon nanotubes adhering to respective surfaces of the carbon fibers, and a plurality of fixing resin parts partly fixing the carbon nanotubes on the surfaces of the carbon fibers, where the fixing resin parts cover 7% or more and 30% or less of the surfaces of the carbon fibers to which the carbon nanotubes adhere.Type: GrantFiled: September 21, 2018Date of Patent: June 28, 2022Assignee: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai
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Patent number: 11345600Abstract: A CNT dispersion includes a dispersion medium, and a nanocarbon material containing carbon nanotubes dispersed in the dispersion medium. 98% or more of the nanocarbon material has a length of 1 ?m or more and 105 ?m or less and the nanocarbon material has an average aspect ratio of 100 or more and 20000 or less.Type: GrantFiled: October 22, 2018Date of Patent: May 31, 2022Assignee: NITTA CORPORATIONInventors: Tomohiro Furuzono, Takuji Komukai
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Patent number: 11168440Abstract: A method for producing a composite material includes: preparing a dispersion, in which carbon nanotubes are dispersed without adding a dispersant or an adhesive; giving mechanical energy to the dispersion to create a reversible reaction condition in the dispersion, in which a dispersion state of the carbon nanotubes and an aggregation state of the carbon nanotubes are constantly generated; immersing the base material in the dispersion that is in the reversible reaction condition to allow the carbon nanotubes to adhere to the surface of the base material; and drawing the base material adhered with the carbon nanotubes from the dispersion, followed by drying.Type: GrantFiled: September 16, 2019Date of Patent: November 9, 2021Assignee: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai
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Publication number: 20210230386Abstract: Provided are a composite material capable of further enhancing property derived from carbon nanotubes adhered to carbon fibers, a prepreg, a carbon-fiber-reinforced molded article, and a method for manufacturing a composite material. There is provided a composite material including: carbon fibers; and a structure which includes a plurality of carbon nanotubes and has a network structure in which the carbon nanotubes are in direct contact with each other, and in which the carbon nanotubes adhered to surfaces of the carbon fibers directly adhere to the surfaces of the carbon fibers. The carbon nanotubes have a bent shape having a bent portion.Type: ApplicationFiled: June 10, 2019Publication date: July 29, 2021Inventors: Takuji KOMUKAI, Maki ONIZUKA, Hiromi TERUHIRA
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Publication number: 20200331757Abstract: A CNT dispersion includes a dispersion medium, and a nanocarbon material containing carbon nanotubes dispersed in the dispersion medium. 98% or more of the nanocarbon material has a length of 1 ?m or more and 105 ?m or less and the nanocarbon material has an average aspect ratio of 100 or more and 20000 or less.Type: ApplicationFiled: October 22, 2018Publication date: October 22, 2020Applicant: NITTA CORPORATIONInventors: Tomohiro Furuzono, Takuji Komukai
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Publication number: 20200255613Abstract: Provided are a composite material that adequately obtains the effect of carbon nanotubes, a prepreg in which the composite material is used, a carbon-fiber-reinforced molded article having greater resistance to the progression of the interlayer peeling crack, and a method for manufacturing the composite material. A composite material includes a carbon fiber bundle in which a plurality of continuous carbon fibers are arranged, carbon nanotubes adhering to respective surfaces of the carbon fibers, and a plurality of fixing resin parts partly fixing the carbon nanotubes on the surfaces of the carbon fibers, where the fixing resin parts cover 7% or more and 30% or less of the surfaces of the carbon fibers to which the carbon nanotubes adhere.Type: ApplicationFiled: September 21, 2018Publication date: August 13, 2020Applicant: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai
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Patent number: 10689797Abstract: Provided are a method for manufacturing a composite fabric capable of further improving the strength of a carbon fiber-reinforced molded article, a composite fabric, and a carbon fiber-reinforced molded article. The method includes a step of holding a surface of a filter part (22A), through which a dispersion solvent and carbon nanotubes dispersed in the dispersion solvent are allowed to pass, in contact with at least one surface of a woven fabric (12A) including a carbon fiber bundle as weaving yarn, a step of immersing the woven fabric (12A) on which the filter part (22A) is held in a dispersion that comprises the dispersion solvent and the dispersed carbon nanotubes and applying ultrasonic vibrations to the dispersion, and a step of extracting the woven fabric (12A) on which the filter part (22A) is held from the dispersion and removing the filter part (22A) from the woven fabric (12A).Type: GrantFiled: March 22, 2017Date of Patent: June 23, 2020Assignee: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai
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Publication number: 20200141539Abstract: A high pressure container has enhanced pressure resistant strength, and a method for manufacturing such high pressure container. The high pressure container includes a sealable hollow liner and a reinforcement layer including a composite carbon fiber bundle covering an outer surface of the hollow liner, wherein the reinforcement layer is wound around the outer surface of the hollow liner and fixed with a cured product of thermosetting resin, and a stress relaxation portion including the cured product of thermosetting product and a plurality of carbon nanotubes between a carbon fiber contained in one composite carbon fiber bundle and a carbon fiber contained in the other composite carbon fiber bundle.Type: ApplicationFiled: December 5, 2019Publication date: May 7, 2020Applicants: NITTA CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromi TERUHIRA, Takuji KOMUKAI, Maki ONIZUKA, Naoki NAKAMURA, Masaki ANDO
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Publication number: 20200040518Abstract: A method for producing a composite material includes: preparing a dispersion, in which carbon nanotubes are dispersed without adding a dispersant or an adhesive; giving mechanical energy to the dispersion to create a reversible reaction condition in the dispersion, in which a dispersion state of the carbon nanotubes and an aggregation state of the carbon nanotubes are constantly generated; immersing the base material in the dispersion that is in the reversible reaction condition to allow the carbon nanotubes to adhere to the surface of the base material; and drawing the base material adhered with the carbon nanotubes from the dispersion, followed by drying.Type: ApplicationFiled: September 16, 2019Publication date: February 6, 2020Inventors: Maki Onizuka, Takuji Komukai
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Publication number: 20200002492Abstract: A composite material includes: a carbon fiber bundle in which a plurality of continuous carbon fibers is arranged; carbon nanotubes which adhere to respective surfaces of the carbon fibers; and a sizing agent which covers at least a part of each of the surfaces to which the carbon nanotubes adhere. When the composite material disposed such that a longitudinal direction is vertically oriented is pierced with an inspection needle having a diameter of 0.55 mm across the longitudinal direction, and the composite material and the inspection needle are relatively moved in the longitudinal direction by 40 mm at a speed of 300 mm/min, a maximum value of a load acting between the composite material and the inspection needle is smaller than 0.5 N.Type: ApplicationFiled: February 8, 2018Publication date: January 2, 2020Applicant: NITTA CORPORATIONInventors: Maki Onizuka, Takuji Komukai, Daiki Ishii, Jun Inoi
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Publication number: 20190358930Abstract: A carbon fiber-reinforced molded article includes an arranged composite material and a cured resin product. The composite material includes a carbon fiber bundle and carbon nanotubes. The carbon fiber bundle is in which a plurality of continuous carbon fibers are arranged. The carbon nanotubes adhere to respective surfaces of the carbon fibers. A modulus of elasticity obtained by conducting a three-point bending test with a cushioning material is smaller than a modulus of elasticity obtained by conducting the three-point bending test without the cushioning material.Type: ApplicationFiled: February 9, 2018Publication date: November 28, 2019Applicant: NITTA CORPORATIONInventors: Maki Onizuka, Katsuyuki Nakai, Takuji Komukai, Hiromi Teruhira