Patents by Inventor Sumio Itamura

Sumio Itamura 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: 5804270
    Abstract: A collapsible tube is obtained by heat bonding a head to a polyolefin sleeve, the head comprising a composition which comprises a polyolefin resin (A), a saponified product of ethylene-vinyl acetate copolymer (B) having a melting point of at least 135.degree. C., and a saponified product ethylene-vinyl acetate. copolymer (C) having a melting point of not more than 130.degree. C.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: September 8, 1998
    Assignee: Kuraray Co., Ltd.
    Inventors: Syukiti Kawamura, Sumio Itamura, Kazuyori Yoshimi
  • Patent number: 5492953
    Abstract: Provided are resin compositions comprising the following (A), (B), (C), which is at least one member selected from (C.sub.1) through (C.sub.3) and (D):(A): a polyolefin,(B): a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%,(C): (C.sub.1): at least one inorganic substance selected from titanium oxide, talc, calcium carbonate, mica and absorptive inorganic materials,(C.sub.2): at least one compound selected from the group consisting of metal salts of higher fatty acid having 8 to 22 carbon atoms, metal salts of ethylenediaminetetraacetic acid and hydrotalcite, and(C.sub.3): a polyolefin modified with an unsaturated carboxylic acid or derivatives thereof;and,(D): a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 68 to 98 mol % and a saponification degree of vinyl acetate component of at least 20%.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: February 20, 1996
    Assignee: Kuraray Co., Ltd.
    Inventors: Sumio Itamura, Tohei Moritani, Toshiaki Sato, Taichi Negi
  • Patent number: 5389709
    Abstract: Provided are resin compositions comprising the following (A), (B), (C), which is at least one member selected from (C.sub.1) through (C.sub.3), and (D):(A): a polyolefin,(B): a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%,(C):(C.sub.1): at least one inorganic substance selected from titanium oxide, talc, calcium carbonate, mica and absorptive inorganic materials,(C.sub.2): at least one compound selected from the group consisting of metal salts of higher fatty acid having 8 to 22 carbon atoms, metal salts of ethylenediaminetetraacetic acid and hydrotalcite, and(C.sub.3): a polyolefin modified with an unsaturated carboxylic acid or derivatives thereof;and,(D): a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 68 to 98 mol % and a saponification degree of vinyl acetate-component of at least 20%.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: February 14, 1995
    Assignee: Kuraray Co., Ltd.
    Inventors: Sumio Itamura, Tohei Moritani, Toshiaki Sato, Taichi Negi
  • Patent number: 5344715
    Abstract: A heat shrinkable film or multilayered film comprising at least one layer comprising an EVOH (A) having an average ethylene content of 20 to 60 mol % and an areal shrinkage when immersed in hot water at 90.degree. C. for 1 minute of at least 10% and having thermal characteristics satisfying the following condition (i)1.ltoreq..vertline.{T(1)-T(2)}-{t(1)-t(2)}.vertline..ltoreq.20 (i)wherein 1.ltoreq..vertline.t(1)-T(1).vertline..ltoreq.20 in the case of T(1)=T(2) and t(1)=t(2) andwherein T(1) and T(2) represent peak temperature (.degree.C.) on the highest temperature side and lowest temperature side respectively in differential scanning calorimetry (DSC) measurement of said EVOH (A) and t(1) and t(2) peak temperatures originating from T(1) and T(2), respectively, in DSC measurement of said EVOH having been treated with an alkaline solvent.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: September 6, 1994
    Assignee: Kuraray Co., Ltd.
    Inventors: Taichi Negi, Sumio Itamura, Satoshi Hirofuji
  • Patent number: 5094921
    Abstract: Provided are multilayered structures comprising at least 2 layers of a layer which comprises a resin composition comprising:(A) a thermoplastic resin,(B) a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%, and(C) a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 68 to 98 mol % and a saponification degree of vinyl acetate component of at least 20%, anda layer which comprises a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%.These multilayered structures have excellent gas barrier properties and resistance to intralayer delamination, and the resin composition layer thereof has neat appearance.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: March 10, 1992
    Assignee: Kuraray Co., Ltd.
    Inventors: Sumio Itamura, Tohei Moritani, Toshiaki Sato, Taichi Negi
  • Patent number: 5082743
    Abstract: Provided are resin compositions comprising:(A) 60 to 95% by weight of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 65 mol % and a saponification degree of vinyl acetate component of at least 96%,(B) 4.5 to 39.5% by weight of an ethylene-vinyl acetate copolymer having an ethylene content of 60 to 98 mol %, and(C) at least 0.5% by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 68 to 98 mol % and a saponification degree of vinyl acetate component of at least 20%, the incorporation ratio of (C) based on the sum of (B) and(C) being not more than 38% by weight.The resin compositions of the present invention have markedly improved flexibility without deteriorating transparency and gas barrier properties as compared with conventional saponified products of ethylene-vinyl acetate copolymers.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: January 21, 1992
    Assignee: Kuraray Co., Ltd.
    Inventors: Sumio Itamura, Tohei Moritani