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    EXPANDED BEAD AND METHOD FOR PRODUCING THE SAME
    142.
    发明申请
    EXPANDED BEAD AND METHOD FOR PRODUCING THE SAME 有权

    公开(公告)号：US20220267552A1

    公开(公告)日：2022-08-25

    申请号：US17591725

    申请日：2022-02-03

    Applicant: JSP CORPORATION

    Inventor： Takumi SAKAMURA ,  Hajime OHTA

    IPC: C08J9/18 ,  C08J9/00 ,  C08J9/12 ,  B29C44/34

    Abstract: An expanded bead having a tubular shape with a through hole and a method for producing the same are provided. The expanded bead includes a foamed core layer and a covering layer. A polyolefin-based resin included in the covering layer has a melting point lower than a melting point of a polypropylene-based resin included in the foamed core layer. An average hole diameter d of the through hole of the expanded bead is less than 1 mm, and a ratio d/D of the average hole diameter d to an average outer diameter D of the expanded bead is 0.4 or less. The polypropylene-based resin for the foamed core layer has a flexural modulus of 1,200 MPa or more and a melting point of 158° C. or lower.

    Expanded beads and molded object thereof
    143.
    发明授权
    Expanded beads and molded object thereof 有权

    公开(公告)号：US11225562B2

    公开(公告)日：2022-01-18

    申请号：US16333479

    申请日：2017-09-15

    Applicant: JSP Corporation

    Inventor： Shota Takagi ,  Masaharu Oikawa

    IPC: C08J9/18 ,  B29C44/34 ,  B29C44/44 ,  B29K23/00 ,  C08K5/00

    Abstract: The present invention provides expanded beads comprising a crosslinked multi-block copolymer containing an ethylene block and an ethylene-α-olefin copolymer block, having an apparent density of 40 to 300 g/L, a gel fraction of 30 to 70% by weight by a hot xylene extraction method, an average cell diameter (a) of 50 to 180 μm, and an average surface layer thickness (b) of 3 to 27 μm, and the expanded beads are excellent in in-mold moldability, and can produce an expanded beads molded article being excellent in tensile characteristics in a well balanced manner.

    METHOD FOR PRODUCING POLYPROPYLENE-BASED RESIN FOAMED MOLDED ARTICLE
    145.
    发明申请
    METHOD FOR PRODUCING POLYPROPYLENE-BASED RESIN FOAMED MOLDED ARTICLE 有权

    公开(公告)号：US20210309843A1

    公开(公告)日：2021-10-07

    申请号：US17274530

    申请日：2018-09-21

    Applicant: JSP CORPORATION

    Inventor： Masahiro GOMIBUCHI ,  Jinichiro NORO

    IPC: C08L23/14 ,  C08J9/12

    Abstract: A method for producing a polypropylene-based resin foamed molded article by blow molding a foamed parison formed of a base resin, in which: the base resin contains, in specific mixing proportions, a branched polypropylene-based resin (A), a linear polypropylene-based resin (B) and a recovered raw material (C) that is recovered in the course of production of the polypropylene-based resin foamed molded article. Each of the resin (A), resin (B) and the recovered raw material (C), has a specific range of a melt tension and a melt flow rate. A difference in melting point between the resin (A) and resin (B) is within a specific range. A difference in crystallization temperature between the resin (A) and resin (B) is within a specific range.

    SKIN-COVERED FOAMED MOLDED ARTICLE
    147.
    发明申请
    SKIN-COVERED FOAMED MOLDED ARTICLE 审中-公开

    公开(公告)号：US20200282695A1

    公开(公告)日：2020-09-10

    申请号：US16645420

    申请日：2018-09-14

    Applicant: JSP CORPORATION

    Inventor： Tomoo TOKIWA

    IPC: B32B5/24 ,  B29B11/06 ,  B29B11/16 ,  B29C44/44 ,  B29C44/14 ,  B32B27/32 ,  B32B27/20 ,  C08J9/228 ,  C08J9/00

    Abstract: A skin-covered foamed molded article having excellent lightweight property, bending rigidity, and favorable dimensional stability, which includes: a skin material composed of a hollow molded body produced by blow-molding an extruded parison; and an expanded bead molded article located inside the skin material, wherein the skin material has an average wall thickness of from 1.0 mm to 5.0 mm, the skin material includes a glass fiber-reinforced polypropylene-based resin containing glass fiber in a range of from 5 mass % to 30 mass %, the glass fiber has a weight-average fiber length of from 0.4 mm to 1.5 mm, the expanded bead molded article includes a polypropylene-based resin, the peeling strength between the skin material and the expanded bead molded article is 0.1 MPa or higher, and the longitudinal linear expansion coefficient of the skin-covered foamed molded article (100) at from 23° C. to 80° C. is 7×10−5/° C. or lower.

    Thermoplastic resin foamed particles
    149.
    再颁专利
    Thermoplastic resin foamed particles 有权

    公开(公告)号：USRE48098E1

    公开(公告)日：2020-07-14

    申请号：US16263547

    申请日：2019-01-31

    Applicant: JSP CORPORATION

    Inventor： Takuya Chiba ,  Masaharu Oikawa

    IPC: C08J9/16 ,  B29B9/06 ,  B29C44/02 ,  B29C44/34 ,  C08J9/00 ,  C08J9/12 ,  C08J9/228 ,  C08J9/232 ,  B32B5/18 ,  B32B27/18 ,  C08J9/18 ,  C08J9/22 ,  B29K105/12 ,  B29K509/00

    Abstract: Thermoplastic resin foamed particles of the present invention including more than one or more functional additive selected from inorganic powder and inorganic fibers each includes a core layer formed of a thermoplastic resin and a coating layer in a foamed state formed of a thermoplastic resin, the mass ratio of the coating layer to the core layer is 99:1 to 50:50, the content (X) of the functional additive in the core layer is 5 to 90% by mass, and the content of the functional additive in the coating layer is smaller than the content (X) of the functional additive in the core layer. By this way, thermoplastic resin foamed particles from which a homogeneous foamed particle molding having excellent dimension stability, fusibility and appearance can be obtained while containing functional additive are provided.

    EXPANDED PARTICLES CROSSLINKED WITH OLEFIN-TYPE THERMOPLASTIC ELASTOMER
    150.
    发明申请
    EXPANDED PARTICLES CROSSLINKED WITH OLEFIN-TYPE THERMOPLASTIC ELASTOMER 审中-公开

    公开(公告)号：US20200165404A1

    公开(公告)日：2020-05-28

    申请号：US16613396

    申请日：2018-05-15

    Applicant: JSP Corporation

    Inventor： Shota TAKAGI ,  Masaharu OIKAWA

    IPC: C08J9/18 ,  C08J9/12 ,  C08K5/14 ,  C08J9/228 ,  C08J9/224

    Abstract: The present invention provides thermoplastic olefin elastomer crosslinked expanded beads, having a content of a fraction insoluble in hot xylene of 10 to 40 wt %, and having a crystal structure such that a melting peak inherent in the thermoplastic olefin elastomer (inherent peak) and one or more melting peaks on a higher temperature side than the inherent peak (high temperature peak) appear on a DSC curve obtained by heating the crosslinked expanded beads from 23° C. to 200° C. at a heating rate of 10° C./min, wherein in the DSC curve, a total heat of melting is 40 to 60 J/g, and a ratio of a heat of melting of the high temperature peak to the total heat of melting is 0.1 to 0.6.

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