Patents by Inventor Makoto Ootsubo

Makoto Ootsubo 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).

  • Publication number: 20210003538
    Abstract: The present invention provides a method for inspecting a material to be inspected using ultrasound waves, the method including the following step 201 to step 301, in which step 201 is performed in a condition where: the surface temperature of a material under inspection—atmospheric temperature >2° C., and inspection using ultrasound waves in step 301 satisfies: a refractive attenuation rate ?1.5%. Step 201: blowing a fluid from a blowing port onto the material to be inspected. Step 301: inspecting the material to be inspected using the ultrasound waves after step 201 or at the same time as the step 201.
    Type: Application
    Filed: March 6, 2019
    Publication date: January 7, 2021
    Applicant: Teijin Limited
    Inventors: Takashi Toyozumi, Hodaka Yokomizo, Makoto Ootsubo, Shuhei Suzuki, Akihiko Obata
  • Publication number: 20200369843
    Abstract: A composite material which includes a thermoplastic matrix resin and carbon fibers A including carbon fiber bundles A1 in which Li/(Ni×Di2) satisfies 6.7×101 to 3.3×103, wherein the carbon fibers A have a fiber length of 5-100 mm and have a value of LwA1/(NA1ave×DA12) of 1.0×102 to 3.3×103, the carbon fiber bundles A1 having an average bundle width WA1 less than 3.5 mm and being contained in an amount of 90 vol % or larger with respect to the carbon fibers A A production method for producing a molded object from the composite material-is also provided.
    Type: Application
    Filed: November 21, 2018
    Publication date: November 26, 2020
    Applicant: Teijin Limited
    Inventors: Makoto Ootsubo, Takeru Ohki, Guofei Hua, Akihisa Nomura, Shuhei Suzuki, Shuhei Onoue, Takumi Kato, Takashi Toyozumi
  • Publication number: 20200332077
    Abstract: Provided is a reinforcing fiber mat including a reinforcing fiber mat constituted by reinforcing fibers having an average fiber length of 3 to 100 mm. The reinforcing fibers satisfy the following i) to iv): i) a weight-average fiber width (Ww) of the reinforcing fibers satisfies the following Equation (1): 0.03 mm<Ww<5.0 mm (1); ii) an average fiber width dispersion ratio (Ww/Wn) defined as a ratio of the weight-average fiber width (Ww) to a number-average fiber width (Wn) of the reinforcing fibers is 1.8 or more and 20.0 or less; iii) a weight-average fiber thickness of the reinforcing fibers is smaller than the weight-average fiber width (Ww); and iv) a fiber width distribution of the reinforcing fibers included in the reinforcing fiber mat has at least two peaks.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 22, 2020
    Inventors: Naoaki Sonoda, Makoto Ootsubo, Takeru Ohki
  • Patent number: 10738168
    Abstract: Provided is a fiber-reinforced composite material shaped product having isotropy and mechanical strength and a random mat used as an intermediate material thereof. The random mat includes reinforcing fibers having an average fiber length of 3 to 100 mm and a thermoplastic resin, in which the reinforcing fibers satisfy the following i) to iii). i) A weight-average fiber width (Ww) of the reinforcing fibers satisfies the following Equation (1). 0.03 mm<Ww<5.0 mm??(1) ii) An average fiber width dispersion ratio (Ww/Wn) defined as a ratio of the weight-average fiber width (Ww) to a number-average fiber width (Wn) of the reinforcing fibers is 1.8 or more and 20.0 or less. iii) A weight-average fiber thickness of the reinforcing fibers is smaller than the weight-average fiber width (Ww).
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: August 11, 2020
    Assignee: Teijin Limited
    Inventors: Naoaki Sonoda, Makoto Ootsubo, Takeru Ohki
  • Patent number: 10550496
    Abstract: A method for producing yarns separated from reinforcing fiber strands including a process of intermittently separating fibers of the reinforcing fiber strands.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: February 4, 2020
    Assignee: Teijin Limited
    Inventors: Makoto Ootsubo, Yukino Oosawa
  • Patent number: 10406762
    Abstract: A carbon-fiber-reinforced resin composite material includes: carbon fibers including carbon fiber bundles and a thermoplastic resin, in which (1) a coefficient of variation (CV1) of a total areal weight of the carbon-fiber-reinforced resin composite material is 10% or lower, (2) a coefficient of variation (CV2) of a carbon fiber volume fraction (Vf) in the carbon-fiber-reinforced resin composite material which is defined by Expression (a) is 15% or lower, and (3) a weight average fiber length of the carbon fibers is 1 to 100 mm. Carbon Fiber Volume Fraction (Vf)=100×Volume of Carbon Fibers/(Volume of Carbon Fibers+Volume of Thermoplastic Resin)??Expression (a).
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: September 10, 2019
    Assignee: Teijin Limited
    Inventors: Shuhei Onoue, Makoto Ootsubo, Yasunori Nagakura, Naoaki Sonoda
  • Patent number: 10300621
    Abstract: According to an aspect of the present invention, there is provided a method for producing cut bodies including: cutting a fiber-reinforced resin material, the fiber-reinforced resin material including reinforcing fibers and a thermoplastic resin, the reinforcing fibers having a tensile strength of 1,000 MPa to 6,000 MPa; and heating the fiber-reinforced resin material, wherein a flexural modulus of the fiber-reinforced resin material at the cutting is decreased to a value ranging from 80% to 15% of the flexural modulus of the fiber-reinforced resin material before heating.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: May 28, 2019
    Assignee: Teijin Limited
    Inventors: Makoto Ootsubo, Hiroya Hada, Toshiki Maeda, Takuo Kanzaki
  • Patent number: 10208174
    Abstract: There is provided a random mat including reinforcing fibers having an average fiber length of 3 to 100 mm and a thermoplastic resin, wherein the reinforcing fibers satisfy the following i) to iii). i) The reinforcing fibers have a weight-average fiber width (Ww) which satisfies the following equation (1). 0 mm<Ww<2.8 mm??(1) ii) The reinforcing fibers have an average-fiber-width dispersion ratio (Ww/Wn), which is defined as a ratio of the weight-average fiber width (Ww) to a number-average fiber width (Wn), of 1.00 or more and 2.00 or less. iii) The reinforcing fibers have a weight-average fiber thickness which is smaller than the weight-average fiber width (Ww) thereof.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: February 19, 2019
    Assignee: Teijin Limited
    Inventors: Naoaki Sonoda, Makoto Ootsubo, Takeru Ohki
  • Publication number: 20180134857
    Abstract: There is provided a random mat including reinforcing fibers having an average fiber length of 3 to 100 mm and a thermoplastic resin, wherein the reinforcing fibers satisfy the following i) to iii). i) The reinforcing fibers have a weight-average fiber width (Ww) which satisfies the following equation (1). 0 mm<Ww<2.8 mm (1) ii) The reinforcing fibers have an average-fiber-width dispersion ratio (Ww/Wn), which is defined as a ratio of the weight-average fiber width (Ww) to a number-average fiber width (Wn), of 1.00 or more and 2.00 or less. iii) The reinforcing fibers have a weight-average fiber thickness which is smaller than the weight-average fiber width (Ww) thereof.
    Type: Application
    Filed: January 16, 2018
    Publication date: May 17, 2018
    Inventors: Naoaki Sonoda, Makoto Ootsubo, Takeru Ohki
  • Publication number: 20180119317
    Abstract: A method for producing yarns separated from reinforcing fiber strands including a process of intermittently separating fibers of the reinforcing fiber strands.
    Type: Application
    Filed: February 24, 2016
    Publication date: May 3, 2018
    Applicant: Teijin Limited
    Inventors: Makoto Ootsubo, Yukino Oosawa
  • Publication number: 20180001577
    Abstract: A carbon-fiber-reinforced resin composite material includes: carbon fibers including carbon fiber bundles and a thermoplastic resin, in which (1) a coefficient of variation (CV1) of a total areal weight of the carbon-fiber-reinforced resin composite material is 10% or lower, (2) a coefficient of variation (CV2) of a carbon fiber volume fraction (Vf) in the carbon-fiber-reinforced resin composite material which is defined by Expression (a) is 15% or lower, and (3) a weight average fiber length of the carbon fibers is 1 to 100 mm. Carbon Fiber Volume Fraction (Vf)=100×Volume of Carbon Fibers/(Volume of Carbon Fibers+Volume of Thermoplastic Resin) . . . Expression (a).
    Type: Application
    Filed: September 18, 2017
    Publication date: January 4, 2018
    Applicant: Teijin Limited
    Inventors: Shuhei Onoue, Makoto Ootsubo, Yasunori Nagakura, Naoaki Sonoda
  • Patent number: 9528200
    Abstract: A method for manufacturing a reinforcing fiber strand is provided, in which a strand including reinforcing fibers passes through an uneven jig and a widening jig in this order, the uneven jig including a plurality of uneven portions having notched and protrusion portions, and the strand is divided by the protruding portions.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: December 27, 2016
    Assignee: Teijin Limited
    Inventors: Yukino Oosawa, Makoto Ootsubo, Takeru Ooki, Katsuyuki Hagihara
  • Publication number: 20160059432
    Abstract: According to an aspect of the present invention, there is provided a method for producing cut bodies including: cutting a fiber-reinforced resin material including reinforcing fibers having a tensile strength of 1,000 MPa to 6,000 MPa and a thermoplastic resin, wherein a flexural modulus of the fiber-reinforced resin material is decreased to 80% to 15% at the cutting.
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Applicant: Teijin Limited
    Inventors: Makoto Ootsubo, Hiroya Hada, Toshiki Maeda, Takuo Kanzaki
  • Publication number: 20150259832
    Abstract: A method for manufacturing a reinforcing fiber strand is provided, in which a strand including reinforcing fibers passes through an uneven jig and a widening jig in this order, the uneven jig including a plurality of uneven portions having notched and protrusion portions, and the strand is divided by the protruding portions.
    Type: Application
    Filed: December 21, 2012
    Publication date: September 17, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Yukino Oosawa, Makoto Ootsubo, Takeru Ooki, Katsuyuki Hagihara
  • Publication number: 20150203642
    Abstract: Provided is a fiber-reinforced composite material shaped product having isotropy and mechanical strength and a random mat used as an intermediate material thereof. The random mat includes reinforcing fibers having an average fiber length of 3 to 100 mm and a thermoplastic resin, in which the reinforcing fibers satisfy the following i) to iii). i) A weight-average fiber width (Ww) of the reinforcing fibers satisfies the following Equation (1). 0.03 mm<Ww<5.0 mm??(1) ii) An average fiber width dispersion ratio (Ww/Wn) defined as a ratio of the weight-average fiber width (Ww) to a number-average fiber width (Wn) of the reinforcing fibers is 1.8 or more and 20.0 or less. iii) A weight-average fiber thickness of the reinforcing fibers is smaller than the weight-average fiber width (Ww).
    Type: Application
    Filed: July 30, 2013
    Publication date: July 23, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Naoaki Sonoda, Makoto Ootsubo, Takeru Ohki
  • Publication number: 20150158984
    Abstract: There is provided a random mat including reinforcing fibers having an average fiber length of 3 to 100 mm and a thermoplastic resin, wherein the reinforcing fibers satisfy the following i) to iii). i) The reinforcing fibers have a weight-average fiber width (Ww) which satisfies the following equation (1). 0 mm<Ww<2.8 mm ??(1) ii) The reinforcing fibers have an average-fiber-width dispersion ratio (Ww/Wn), which is defined as a ratio of the weight-average fiber width (Ww) to a number-average fiber width (Wn), of 1.00 or more and 2.00 or less. iii) The reinforcing fibers have a weight-average fiber thickness which is smaller than the weight-average fiber width (Ww) thereof.
    Type: Application
    Filed: July 30, 2013
    Publication date: June 11, 2015
    Applicant: Teijin Limited
    Inventors: Naoaki Sonoda, Makoto Ootsubo, Takeru Ohki
  • Publication number: 20150031257
    Abstract: There is provided a random mat including reinforcing fibers wherein the content of reinforcing fibers having a fiber length of 3 mm or more and less than 15 mm is 50 to 100% by mass based on all the reinforcing fibers contained in the random mat and the content of reinforcing fibers having a fiber length of 15 mm or more and 50 mm or less is 0 to 50% by mass based on all the reinforcing fibers contained in the random mat, and satisfies specific values of fiber areal weight and the degree of opening.
    Type: Application
    Filed: December 20, 2012
    Publication date: January 29, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Makoto Ootsubo, Yuhei Konagai
  • Publication number: 20140339036
    Abstract: A shock absorption member which is lightweight, has a high degree of freedom in shape, and is capable of efficiently absorbing shock energy, is provided. A shock absorption member including a bottom surface part and an upright part provided on the bottom surface part, in which at least one of the bottom surface part and the upright part includes a carbon-fiber-reinforced composite material including a thermoplastic resin, and the other may include a thermoplastic resin, and in which the amount of the thermoplastic resin present therein is 30 to 1,000 parts by mass based on 100 parts by mass of carbon fibers, and the average fiber length of the carbon fibers is 3 to 100 mm.
    Type: Application
    Filed: November 27, 2012
    Publication date: November 20, 2014
    Applicant: TEIJIN LIMITED
    Inventors: Tsukasa ARAI, Yuhei Konagai, Makoto Ootsubo, Masatomo Teshima