Patents by Inventor Taizo KITAHARA

Taizo KITAHARA 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).

  • Propylene resin foamed particle and foamed particle molded body
    Patent number: 10487188
    Abstract: The present invention is concerned with expanded propylene resin beads including a core layer being in a foamed state, having a tubular shape, and being constituted of a propylene-based resin composition (a) satisfying the following (i) and (ii) and a cover layer being constituted of an olefin-based resin (b) satisfying the following (iii) or (iv). (i) A mixture of 75% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 100° C. to 140° C. and 25% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 140° C. to 165° C. (ii) A difference between the melting point of the resin (a2) and the melting point of the resin (a1) is 15° C. or more. (iii) A crystalline olefin-based resin having a melting point TmB that is lower than a melting point TmA of the composition (a) and having a relation of 0° C.<[TmA?TmB]?80° C. (iv) A non-crystalline olefin-based resin having a softening point TsB that is lower than TmA and having a relation of 0° C.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: November 26, 2019
    Assignee: JSP Corporation
    Inventors: Taizo Kitahara, Michitoshi Ono, Kazuo Tsurugai
  • Propylene-based resin foam particle and foam particle molded body
    Patent number: 10385178
    Abstract: The present invention is concerned with expanded propylene resin beads including a core layer being in a foamed state and constituted of a propylene-based resin composition (a) and a cover layer constituted of an olefin-based resin (b), the propylene-based resin composition (a) satisfying the following (i) and (ii), and the olefin-based resin (b) satisfying the following (iii) or (iv). (i) A mixture of 75% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 100° C. to 140° C. and 25% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 140° C. to 165° C. (ii) A difference between the melting point of the resin (a2) and the melting point of the resin (a1) is 15° C. or more. (iii) A crystalline olefin-based resin having a melting point TmB that is lower than a melting point TmA of the composition (a) and having a relation of 0° C.<[TmA?TmB]?80° C.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: August 20, 2019
    Assignee: JSP Corporation
    Inventors: Michitoshi Ono, Taizo Kitahara, Kazuo Tsurugai
  • PROPYLENE RESIN FOAMED PARTICLE AND FOAMED PARTICLE MOLDED BODY
    Publication number: 20180215891
    Abstract: The present invention is concerned with expanded propylene resin beads including a core layer being in a foamed state, having a tubular shape, and being constituted of a propylene-based resin composition (a) satisfying the following (i) and (ii) and a cover layer being constituted of an olefin-based resin (b) satisfying the following (iii) or (iv). (i) A mixture of 75% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 100° C. to 140° C. and 25% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 140° C. to 165° C. (ii) A difference between the melting point of the resin (a2) and the melting point of the resin (a1) is 15° C. or more. (iii) A crystalline olefin-based resin having a melting point TmB that is lower than a melting point TmA of the composition (a) and having a relation of 0° C.<[TmA?TmB]?80° C. (iv) A non-crystalline olefin-based resin having a softening point TsB that is lower than TmA and having a relation of 0° C.
    Type: Application
    Filed: July 13, 2016
    Publication date: August 2, 2018
    Inventors: Taizo KITAHARA, Michitoshi ONO, Kazuo TSURUGAI
  • PROPYLENE-BASED RESIN FOAM PARTICLE AND FOAM PARTICLE MOLDED BODY
    Publication number: 20160333161
    Abstract: The present invention is concerned with expanded propylene resin beads including a core layer being in a foamed state and constituted of a propylene-based resin composition (a) and a cover layer constituted of an olefin-based resin (b), the propylene-based resin composition (a) satisfying the following (i) and (ii), and the olefin-based resin (b) satisfying the following (iii) or (iv). (i) A mixture of 75% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 100° C. to 140° C. and 25% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 140° C. to 165° C. (ii) A difference between the melting point of the resin (a2) and the melting point of the resin (a1) is 15° C. or more. (iii) A crystalline olefin-based resin having a melting point TmB that is lower than a melting point TmA of the composition (a) and having a relation of 0° C.<[TmA?TmB]?80° C.
    Type: Application
    Filed: December 24, 2014
    Publication date: November 17, 2016
    Inventors: Michitoshi ONO, Taizo KITAHARA, Kazuo TSURUGAI