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    Method for producing skin-covered foamed molded article and apparatus for producing thereof
    1.
    发明授权
    Method for producing skin-covered foamed molded article and apparatus for producing thereof 有权

    公开(公告)号：US10279558B2

    公开(公告)日：2019-05-07

    申请号：US13735375

    申请日：2013-01-07

    Applicant: JSP CORPORATION

    Inventor： Tomoo Tokiwa ,  Masahiro Gomibuchi ,  Daisuke Imanari

    IPC: B29C49/04 ,  B29C44/34 ,  B29C44/14 ,  B32B1/02 ,  B29C44/18 ,  B29C49/46 ,  B29C49/58

    Abstract: A method for producing a skin-covered foamed molded article including blow-molding a parison in a mold cavity to form a skin consisting of a hollow molded body, in which the parison is in a softened state by extruding a molten thermoplastic resin, filling expanded beads in the hollow molded body, and heating and fusion bonding the beads by supplying steam via a steam supply pipe inserted into the hollow molded body. The parison is in contact with a protruding portion, formed by protrusion from an inner surface of the mold cavity to an inside of the cavity, forming a recessed portion having a shape corresponding to the protruding portion in the inward direction of the hollow molded body. A steam hole is formed in the recessed portion, a steam supply pipe is inserted into the body, and the expanded beads are heated and fusion bonded by supplying steam.

    Skin-covered foamed molded article
    3.
    发明授权
    Skin-covered foamed molded article 有权

    公开(公告)号：US11338546B2

    公开(公告)日：2022-05-24

    申请号：US16645420

    申请日：2018-09-14

    Applicant: JSP CORPORATION

    Inventor： Tomoo Tokiwa

    IPC: B32B5/24 ,  B29B11/06 ,  B29B11/16 ,  B29C44/14 ,  B29C44/44 ,  B32B27/20 ,  B32B27/32 ,  C08J9/00 ,  C08J9/228 ,  B29K23/00 ,  B29K309/08 ,  B29L9/00

    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.

    Skin material-coated foamed particle molded body
    7.
    发明授权
    Skin material-coated foamed particle molded body 有权

    公开(公告)号：US11529754B2

    公开(公告)日：2022-12-20

    申请号：US16494255

    申请日：2018-03-19

    Applicant: JSP CORPORATION

    Inventor： Tomoo Tokiwa ,  Hiroki Kawakami

    IPC: B29C44/14 ,  B29C44/44 ,  B32B5/24 ,  B32B27/12

    Abstract: A skin material-coated foamed particle molded body includes a skin material made of a polypropylene-based resin molded body and a polypropylene-based resin foamed particle molded body coated with the skin material. The skin material has a multilayer structure including an inner layer adhered to the foamed particle molded body and an outer layer outside the inner layer. The outer layer contains a polypropylene-based resin and a reinforcement fiber. The inner layer contains the polypropylene-based resin and a reinforcement fiber in a lower content ratio than a content ratio of the reinforcement fiber contained in the outer layer or contains the polypropylene-based resin and substantially no reinforcement fiber. An average value of the outer layer thickness ratio to a sum of the outer and inner layer thicknesses is 0.20 or more and 0.65 or less, and a coefficient of variation Cv of the ratio is 30% or less.

    Method for producing foamed particle molded article provided with skin
    8.
    发明授权
    Method for producing foamed particle molded article provided with skin 有权

    公开(公告)号：US11420365B2

    公开(公告)日：2022-08-23

    申请号：US16469009

    申请日：2017-12-21

    Applicant: JSP CORPORATION

    Inventor： Hiroki Kawakami ,  Tomoo Tokiwa

    IPC: B29C44/18 ,  C08J9/236 ,  C08L23/16 ,  B29B11/06 ,  C08J9/232 ,  B29K23/00 ,  B29K105/04

    Abstract: A method for producing a foamed particle molded article provided with a skin, includes: forming a hollow molded article; filling a hollow part of the hollow molded article with polypropylene-based resin foamed particles; and heating and fusing the particles to each other. A melt elongation at 190° C. of the polypropylene-based resin forming the hollow molded article is 100 m/min or more. A half-crystallization time at 100° C. of the polypropylene-based resin is between 25 to 80 seconds. In heat flux differential scanning calorimetry, a melting peak temperature of the polypropylene-based resin is between 130 to 155° C., a partial heat of fusion at 140° C. or more of the polypropylene-based resin is between 20 to 50 J/g, and a ratio of the partial heat of fusion of the polypropylene-based resin to the total (partial heat of fusion/total heat of fusion) is between 0.2 to 0.8.

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