Patents by Inventor Ryoichi Tsunori

Ryoichi Tsunori 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).

  • Propylenic copolymer, and its film
    Patent number: 6420021
    Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as sealant layers of laminate films.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: July 16, 2002
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori, Tokutaro Kimura, Yutaka Minami
  • PROPYLENIC COPOLYMER, AND ITS FILM
    Publication number: 20010053453
    Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as sealant layers of laminate films.
    Type: Application
    Filed: October 14, 1997
    Publication date: December 20, 2001
    Inventors: YASUSHI SETA, SATOSHI NAKATSUKA, MICHIHIRO SAWADA, RYOICHI TSUNORI, TOKUTARO KIMURA, YUTAKA MINAMI
  • Foaming propylene copolymer, and foamed particles and foams thereof
    Patent number: 6150427
    Abstract: Provided are a foaming propylene-ethylene random copolymer which is characterized in that (1) its ethylene unit content [x (wt. %)] falls between 0.2 and 10% by weight, (2) its MI falls between 1 and 16 g/10 min, (3) its boiling diethyl ether extraction [E (wt. %)] and x satisfy the relation of a formula (I):E.ltoreq.0.25x+1.1 (I),(4) its melting point [Tm (.degree. C.)] and x satisfy the relation of a formula (II):Tm.ltoreq.165-5x (II),(5) its isotactic triad fraction in the PPP chain moiety as measured through .sup.13 C.ltoreq.NMR is not smaller than 98 mol %, and preferably, (6) the relation between the time of relaxation .tau. (sec) of the copolymer and MI of the copolymer satisfies a formula (III):.tau..ltoreq.0.80-0.42.times.log MI (III),and also its foaming beads and cellular articles. The copolymer and its foaming beads have improved primary and secondary foamability, and the cellular articles of the copolymer have excellent mechanical properties including rigidity.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: November 21, 2000
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Toshimichi Ito, Yasushi Seta, Ryoichi Tsunori
  • Propylenic copolymer and its film
    Patent number: 6130305
    Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good impact strength, good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as substrate layers of laminated or co-extruded multi-layered films.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: October 10, 2000
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Yasushi Seta, Ryoichi Tsunori, Satoshi Nakatsuka