Patents by Inventor Takafumi AKIYAMA

Takafumi AKIYAMA 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: 20230313007
    Abstract: An adhesive for an electrical storage device packaging material containing a polyol compound (A), a polyisocyanate compound (B), and an epoxy resin (C), in which the polyol compound (A) contains an ester bond-containing polyol, and the following formula is satisfied when a stress at the time when a cured film obtained by performing curing under the condition of 80° C. for 2 weeks is stretched to twice its length at a speed of 6 mm/min under an environment of 20° C. and 65% RH is S1 [N/mm2], and a stress at the time when the cured film is held for 100 seconds in a stretched state is S2 [N/mm2]. Formula: 10.0?(S1?S2)/S1×100?40.0.
    Type: Application
    Filed: March 29, 2023
    Publication date: October 5, 2023
    Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO-MORTON, LTD., TOYOCHEM CO., LTD.
    Inventors: Koki SHIRAISHI, Hiroshi HANAKI, Tsutomu HIROSHIMA, Takafumi AKIYAMA
  • Publication number: 20210108047
    Abstract: Provided is a resin molded body having excellent electromagnetic wave shielding properties in a high-frequency region of 1 GHz or more. The resin molded body containing a thermoplastic resin, plate-like graphite, at least one of carbon black and metal fibers, the content of the plate-like graphite being 50 parts by weight or more and 200 parts by weight or less, relative to 100 parts by weight of the thermoplastic resin, the carbon black having a DBP oil absorption of 100 ml/100 g or more and 600 ml/100 g or less, the metal fibers having a diameter of 5 ?m or more and 20 ?m or less, the metal fibers having a fiber length of 2 mm or more and 12 mm or less, and the content of at least one of the carbon black and the metal fibers being 1 part by weight or more and 50 parts by weight or less, relative to 100 parts by weight of the thermoplastic resin.
    Type: Application
    Filed: April 23, 2018
    Publication date: April 15, 2021
    Inventors: Ryuuji Matsumura, Yuusuke Suenaga, Takuya Masuda, Takafumi Akiyama
  • Publication number: 20170190085
    Abstract: Provided is a method for producing a foam-molded article that has excellent rigidity, impact resistance, and external appearance, and is capable of ductile fracture. The method for producing a foam-molded article of the present invention includes a kneading step of melt-kneading a resin composition in the presence of a foaming agent, the resin composition containing 100 parts by weight of a propylene-based resin, 1 to 30 parts by weight of an aromatic vinyl-based thermoplastic elastomer, and 1 to 30 parts by weight of an inorganic filler, and a foaming step of injecting the resin composition in a molten state into a mold, to foam and mold the resin composition. The method can produce a foam-molded article that has excellent rigidity, impact resistance, and external appearance, and is capable of ductile fracture.
    Type: Application
    Filed: May 28, 2015
    Publication date: July 6, 2017
    Applicant: SEKISUI TECHNO MOLDING CO., LTD.
    Inventors: Yuusuke SUENAGA, Yasuji KANAMITSU, Takafumi AKIYAMA, Kazuhiro MORITA