Patents by Inventor Motoomi Arakawa

Motoomi Arakawa 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).

  • Patent number: 10322559
    Abstract: There is provided a shaped product made of a fiber-reinforced composite material including reinforcing fibers having an average fiber length of 5 to 100 mm and a thermoplastic resin. In the shaped product, a volume fraction of reinforcing fibers is 5 to 80%, a reference plane (S) and a standing plane (B) inclined at an angle of 45 to 90 degrees with respect to the reference plane are included, a ratio of an area of the standing plane (B) to an area of the reference plane (S) is 0.5 to 100, and in the fiber-reinforced composite material constituting the shaped product, a ratio of a reinforcing fiber bundle (A) including the reinforcing fibers of a critical number of single fiber or more to the total amount of the reinforcing fibers is 20 Vol % or more and 99 Vol % or less.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: June 18, 2019
    Assignee: Teijin Limited
    Inventors: Michiharu Taniguchi, Motoomi Arakawa, Toru Sugiyama, Yasunori Nagakura
  • Patent number: 10006677
    Abstract: The present invention provides a method for manufacturing a shaped product constituted by a fiber-reinforced composite material including reinforcing fibers and a thermoplastic resin. The shaped product maintains isotropy of the fibers to the end thereof even if press-molded under conditions in which charge ratio of a prepreg to a die is low. Specifically, the method includes using a specific prepreg obtained by impregnating the reinforcing fibers with thermoplastic resin, and molding-processing the prepreg under specific conditions.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: June 26, 2018
    Assignee: Teijin Limited
    Inventors: Michiharu Taniguchi, Motoomi Arakawa, Yasunori Nagakura, Tsukasa Arai, Akihiko Obata
  • Patent number: 9855689
    Abstract: There is provided a shaped product made of a fiber-reinforced composite material including reinforcing fibers having an average length of 5 mm or more and 100 mm or less and a thermoplastic resin, in which a volume fraction of reinforcing fibers (Vf=100×volume of reinforcing fibers/(volume of reinforcing fibers+volume of thermoplastic resin)) is 5 to 80%, grains are formed on a surface of the shaped product, and a ratio of a reinforcing fiber bundle (A) including the reinforcing fibers of a critical number of single fiber or more, the critical number defined by Formula (1), to the total amount of the reinforcing fibers is 20 Vol % or more and 99 Vol % or less: Critical number of single fiber=600/D??(1) (wherein D is an average fiber diameter (?m) of single reinforcing fiber).
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: January 2, 2018
    Assignee: Teijin Limited
    Inventors: Motoomi Arakawa, Toru Sugiyama, Michiharu Taniguchi, Yasunori Nagakura
  • Publication number: 20150251387
    Abstract: The present invention is a composite material including an organic filament having a melting point of 200° C. or higher and a thermoplastic resin, characterized in that the organic filament is in the form of a twisted yarn cord or a woven or knitted fabric composed of twisted yarn cord. The composite material of the present invention is excellent in impact strength and can be used as a core material also in a sandwich material.
    Type: Application
    Filed: May 27, 2014
    Publication date: September 10, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Motoomi ARAKAWA, Jirou SADANOBU
  • Patent number: 8992811
    Abstract: This method for manufacturing a shaped product is characterized in preparing a specific random mat including a thermoplastic resin and carbon fiber bundles having an average fiber length of 5-100 mm, impregnating a thermoplastic resin into the random mat, pressing the random mat in a metal mold in a range of 0.1-20 MPa, and then taking out the random mat from the metal mold.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: March 31, 2015
    Assignee: Teijin Limited
    Inventors: Yasunori Nagakura, Motoomi Arakawa, Michiharu Taniguchi, Akihiko Obata
  • Publication number: 20150064408
    Abstract: The present invention provides a method for manufacturing a shaped product constituted by a fiber-reinforced composite material including reinforcing fibers and a thermoplastic resin. The shaped product maintains isotropy of the fibers to the end thereof even if press-molded under conditions in which charge ratio of a prepreg to a die is low. Specifically, the method includes using a specific prepreg obtained by impregnating the reinforcing fibers with thermoplastic resin, and molding-processing the prepreg under specific conditions.
    Type: Application
    Filed: October 31, 2014
    Publication date: March 5, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Michiharu Taniguchi, Motoomi Arakawa, Yasunori Nagakura, Tsukasa Arai, Akihiko Obata
  • Publication number: 20140370245
    Abstract: A method for manufacturing a shaped product includes 1) heating at least three prepregs having a thickness of 0.3 mm to 5.0 mm each including reinforcing fibers having an average fiber length of 3 to 100 mm and a thermoplastic resin, 2) arranging those prepregs so as to constitute at least two layers including P layer and Q layer which are in contact with each other, and 3) then pressing those layers to manufacture one shaped product. A prepreg (p1) in the P layer and a prepreg (q1) in the Q layer are arranged such that at least a part thereof overlaps with each other, and two or more prepregs in the same layer are arranged so as not to be in contact with each other.
    Type: Application
    Filed: December 20, 2012
    Publication date: December 18, 2014
    Applicant: Teijin Limited
    Inventors: Yasunori Nagakura, Yasuyuki Yokoe, Yutaka Kondou, Motoomi Arakawa
  • Patent number: 8900502
    Abstract: The present invention provides a method for manufacturing a shaped product constituted by a fiber-reinforced composite material including reinforcing fibers and a thermoplastic resin, the shaped product with maintained isotropy of the fibers to the end thereof even if press-molded under conditions in which charge ratio of a prepreg to a die is low. Specifically, the method includes using a specific prepreg obtained by impregnating the reinforcing fibers with thermoplastic resin, and molding-processing the prepreg under specific conditions.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 2, 2014
    Assignee: Teijin Limited
    Inventors: Michiharu Taniguchi, Motoomi Arakawa, Yasunori Nagakura, Tsukasa Arai, Akihiko Obata
  • Publication number: 20140186584
    Abstract: There is provided a shaped product made of a fiber-reinforced composite material including reinforcing fibers having an average length of 5 mm or more and 100 mm or less and a thermoplastic resin, in which a volume fraction of reinforcing fibers (Vf=100×volume of reinforcing fibers/(volume of reinforcing fibers+volume of thermoplastic resin)) is 5 to 80%, grains are formed on a surface of the shaped product, and a ratio of a reinforcing fiber bundle (A) including the reinforcing fibers of a critical number of single fiber or more, the critical number defined by Formula (1), to the total amount of the reinforcing fibers is 20 Vol % or more and 99 Vol % or less: Critical number of single fiber=600/D??(1) (wherein D is an average fiber diameter (?m) of single reinforcing fiber).
    Type: Application
    Filed: March 6, 2014
    Publication date: July 3, 2014
    Applicant: Teijin Limited
    Inventors: Motoomi Arakawa, Toru Sugiyama, Michiharu Taniguchi, Yasunori Nagakura
  • Publication number: 20140178653
    Abstract: This production method for a composite shaped product having an undercut portion is able to readily manufacture a composite shaped product having a complicated shape having an undercut portion, by including: a step (i) of forming an impregnated precursor by heating and pressurizing a non-impregnated precursor including carbon fibers with an average fiber length of 1 to 100 mm and a thermoplastic resin; a step (ii) of heating the impregnated precursor at the melting point of the thermoplastic resin or more; a step (iii) of arranging the heated impregnated precursor into a mold having an undercut structure; a step (iv) of clamping the undercut structure after or simultaneously being operated and pressurizing the impregnated precursor; and a step (v) of unclamped the mold, re-operating the undercut structure and taking out the composite shaped material from the unclamped mold.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: TEIJIN LIMITED
    Inventors: Yasunori Nagakura, Motoomi Arakawa
  • Publication number: 20140178631
    Abstract: There is provided a shaped product made of a fiber-reinforced composite material including reinforcing fibers having an average fiber length of 5 to 100 mm and a thermoplastic resin. In the shaped product, a volume fraction of reinforcing fibers is 5 to 80%, a reference plane (S) and a standing plane (B) inclined at an angle of 45 to 90 degrees with respect to the reference plane are included, a ratio of an area of the standing plane (B) to an area of the reference plane (S) is 0.5 to 100, and in the fiber-reinforced composite material constituting the shaped product, a ratio of a reinforcing fiber bundle (A) including the reinforcing fibers of a critical number of single fiber or more to the total amount of the reinforcing fibers is 20 Vol % or more and 99 Vol % or less.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Applicant: Teijin Limited
    Inventors: Michiharu Taniguchi, Motoomi Arakawa, Toru Sugiyama, Yasunori Nagakura
  • Publication number: 20140148072
    Abstract: This method for manufacturing a shaped product is characterized in preparing a specific random mat including a thermoplastic resin and carbon fiber bundles having an average fiber length of 5-100 mm, impregnating a thermoplastic resin into the random mat, pressing the random mat in a metal mold in a range of 0.1-20 MPa, and then taking out the random mat from the metal mold.
    Type: Application
    Filed: February 3, 2014
    Publication date: May 29, 2014
    Applicant: Tenjin Limited
    Inventors: Yasunori Nagakura, Motoomi Arakawa, Michiharu Taniguchi, Akihiko Obata
  • Publication number: 20140077412
    Abstract: The present invention provides a method for manufacturing a shaped product constituted by a fiber-reinforced composite material including reinforcing fibers and a thermoplastic resin, the shaped product with maintained isotropy of the fibers to the end thereof even if press-molded under conditions in which charge ratio of a prepreg to a die is low. Specifically, the method includes using a specific prepreg obtained by impregnating the reinforcing fibers with thermoplastic resin, and molding-processing the prepreg under specific conditions.
    Type: Application
    Filed: November 27, 2013
    Publication date: March 20, 2014
    Applicant: TEIJIN LIMITED
    Inventors: Michiharu Taniguchi, Motoomi Arakawa, Yasunori Nagakura, Tsukasa Arai, Akihiko Obata
  • Publication number: 20140004308
    Abstract: A molded product, including a fiber-reinforced composite material containing reinforcing fibers having an average fiber length of 5 mm to 100 mm and a thermoplastic resin, wherein the molded product has thickness gradient, an amount of the thermoplastic resin is 10 to 1,000 parts by weight per 100 parts by weight of thee reinforcing fibers, and the reinforcing fibers have a fiber areal weight of from 25 g/m2 to 3,000 g/m2 and are substantially two-dimensionally randomly oriented.
    Type: Application
    Filed: August 7, 2013
    Publication date: January 2, 2014
    Applicant: TEIJIN LIMITED
    Inventors: Michiharu Taniguchi, Masaru Sato, Koji Suzuki, Toru Sugiyama, Yasunori Nagakura, Motoomi Arakawa
  • Patent number: 8318305
    Abstract: A resin composition comprising a fiber component and a resin component, wherein the fiber component is (A) a surface-treated fiber (component A) which comprises 100 parts by weight of a fiber comprising a polyalkylene terephthalate and/or a polyalkylene naphthalene dicarboxylate (component Af) and 0.1 to 10 parts by weight of a sizing agent having a glass transition point of ?80° C. or higher and lower than 70° C.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: November 27, 2012
    Assignees: Sumitomo Chemical Company, Limited, Teijin Fibers Limited
    Inventors: Kenji Watanabe, Kenji Atarashi, Kumiko Chatani, Motoomi Arakawa
  • Publication number: 20120231252
    Abstract: The present invention is a composite material comprising an organic filament having a melting point of 200° C. or higher and a thermoplastic resin, characterized in that the organic filament is in the form of a twisted yarn cord or a woven or knitted fabric composed of twisted yarn cord. The composite material of the present invention is excellent in impact strength and can be used as a core material also in a sandwich material.
    Type: Application
    Filed: November 24, 2010
    Publication date: September 13, 2012
    Applicant: TEIJIN LIMITED
    Inventors: Motoomi Arakawa, Jirou Sadanobu
  • Publication number: 20110293913
    Abstract: A resin composition comprising a fiber component and a resin component, wherein the fiber component is (A) a surface-treated fiber (component A) which comprises 100 parts by weight of a fiber comprising a polyalkylene terephthalate and/or a polyalkylene naphthalene dicarboxylate (component Af) and 0.1 to 10 parts by weight of a sizing agent having a glass transition point of ?80° C. or higher and lower than 70° C.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 1, 2011
    Applicants: TEIJIN FIBERS LIMITED, SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kenji WATANABE, Kenji ATARASHI, Kumiko CHATANI, Motoomi ARAKAWA
  • Patent number: 7326762
    Abstract: Disclosed is a copolymer comprising a polyethylene segment which is a main chain; a reactive silicon-containing group which is a side group of the polyethylene segment; and a polycondensation segment bonded to the polyethylene segment, which is a part of the main chain together with the polyethylene segment or a side chain with respect to the polyethylene segment. There are provided a condensation polymer having many reactive silicon-containing groups with respect to one molecule and an organic-inorganic hybrid polymeric material having superior properties such as strength, heat resistance, weather resistance and chemical resistance by using the polymer.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: February 5, 2008
    Assignees: Orient Chemical Industries, Ltd., Osaka Municipal Government
    Inventors: Motoomi Arakawa, Kazuaki Sukata, Masayuki Shimada, Shigehiro Sasao
  • Publication number: 20070100083
    Abstract: The present invention provides a polycarbonate or polyester having reactive silicon-containing groups which can provide an organic-inorganic hybrid polymeric material having strong cross-linkage to inorganic components based on its many reactive silicon-containing groups. The polycarbonate or polyester has the following unit: wherein, either Q1 or Q2 is a side chain having a reactive silicon-containing group, the other of Q1 or Q2, and R1, R2 are each independently hydrogen atom, or an alkyl group, an aryl group, an aroyl group or an aralkyl group, wherein the groups may have a substituted group or atom, Q1 and Q2 may be taken together to form a ring, R1 and R2 may be taken together to form a ring, and R is a bivalent group of alkylene group, arylene group or combination thereof, which accomplishes the above objective.
    Type: Application
    Filed: June 18, 2004
    Publication date: May 3, 2007
    Applicant: ORIENT CHEMICAL INDUSTRIES, LTD.
    Inventors: Motoomi Arakawa, Kazuaki Sukata
  • Patent number: 7157542
    Abstract: Disclosed is a copolymer comprising a polyethylene segment which is a main chain; a reactive silicon-containing group which is a side group of the polyethylene segment; and a polycondensation segment bonded to the polyethylene segment, which is a part of the main chain together with the polyethylene segment or a side chain with respect to the polyethylene segment. There are provided a condensation polymer having many reactive silicon-containing groups with respect to one molecule and an organic-inorganic hybrid polymeric material having superior properties such as strength, heat resistance, weather resistance and chemical resistance by using the polymer.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: January 2, 2007
    Assignees: Orient Chemical Industries, Ltd., Osaka Municipal Government
    Inventors: Motoomi Arakawa, Kazuaki Sukata, Masayuki Shimada, Shigehiro Sasao