Patents by Inventor Hirofumi Moriwaka

Hirofumi Moriwaka 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).

  • Process for production of injection-molded article of polylactic acid resin
    Patent number: 8062574
    Abstract: A method of manufacturing a polylactic acid resin injection molded article, having the step (1): a step of melt-kneading a polylactic acid resin composition containing a polylactic acid resin and a specified organic crystal nucleus agent, while contacting the composition with a supercritical fluid; and step (2): a step of filling the melted product obtained in step (1) in a die to mold with injection-molding. The manufacturing method of the present invention is used as an advantageous technique as compared with the technique of achieving satisfactory moldability by the addition of plasticizer in the field, for example, which requires a polylactic acid resin molded article having high rigidity.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: November 22, 2011
    Assignee: KAO Corporation
    Inventors: Akira Takenaka, Hiroaki Kishimoto, Hirofumi Moriwaka, Haruomi Enomoto
  • PROCESS FOR PRODUCTION OF INJECTION-MOLDED ARTICLE OF POLYLACTIC ACID RESIN
    Publication number: 20100201037
    Abstract: A method of manufacturing a polylactic acid resin injection molded article, having the step (1): a step of melt-kneading a polylactic acid resin composition containing a polylactic acid resin and a specified organic crystal nucleus agent, while contacting the composition with a supercritical fluid; and step (2): a step of filling the melted product obtained in step (1) in a die to mold with injection-molding. The manufacturing method of the present invention is used as an advantageous technique as compared with the technique of achieving satisfactory moldability by the addition of plasticizer in the field, for example, which requires a polylactic acid resin molded article having high rigidity.
    Type: Application
    Filed: September 12, 2008
    Publication date: August 12, 2010
    Inventors: Akira Takenaka, Hiroaki Kishimoto, Hirofumi Moriwaka, Haruomi Enomoto