公开(公告)号：US20190270861A1

公开(公告)日：2019-09-05

申请号：US16344891

申请日：2017-11-02

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/232 ,  C08J9/18 ,  C08J3/20

Abstract: The present invention is concerned with expanded beads of a block copolymer of a polyethylene block and an ethylene/α-olefin copolymer block, wherein a xylene insoluble fraction (A) of the expanded beads by a hot xylene extraction method is 10 to 70% by weight, and a ratio (A/B) of the xylene insoluble fraction (A) to a xylene insoluble fraction (B) of the expanded beads by a hot xylene extraction method when divided into two equal parts and measured is 1.0 to 1.1, and is able to provide expanded beads with excellent in-mold moldability and an expanded beads molded article with excellent fusion bondability and restorability.

公开(公告)号：US20190263993A1

公开(公告)日：2019-08-29

申请号：US16333479

申请日：2017-09-15

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/18 ,  B29C44/44 ,  B29C44/34

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.

公开(公告)号：US20180127559A1

公开(公告)日：2018-05-10

申请号：US15572873

申请日：2016-03-28

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/18 ,  C08J9/224 ,  C08J9/228 ,  C08F297/08

CPC classification number: C08J9/18 ,  C08F210/16 ,  C08F297/086 ,  C08J9/122 ,  C08J9/224 ,  C08J9/228 ,  C08J9/232 ,  C08J2201/026 ,  C08J2203/06 ,  C08J2205/06 ,  C08J2207/00 ,  C08J2323/08 ,  C08J2353/00 ,  C08L53/00

Abstract: An object of the present invention is to provide expanded beads capable of producing an expanded beads molded article that is excellent in in-mold moldability and is excellent with good balance in lightweight property, flexibility, repulsion, restorability, and tensile characteristics, and an expanded beads molded article using the expanded beads. For achieving the object, the present invention provides crosslinked expanded beads produced by crosslinking and expanding particles containing a multi-block copolymer containing a polyethylene block and an ethylene-α-olefin copolymer block, the multi-block copolymer having a melt flow rate of from 2 to 10 g/10 min at 190° C. and a load of 2.16 kg, and a Shore A hardness of from 65 to 90 measured according to ASTM D2240, the crosslinked expanded beads having a gel fraction of from 30 to 60% by a hot xylene extraction method. The expanded beads molded article of the present invention is produced by subjecting the crosslinked expanded beads of the present invention, to in-mold molding. The expanded beads molded article of the present invention may have an apparent density of from 40 to 150 g/L.

公开(公告)号：US20150158990A1

公开(公告)日：2015-06-11

申请号：US14555967

申请日：2014-11-28

Applicant: JSP CORPORATION

Inventor： Shota TAKAGI ,  Akinobu HIRA ,  Kazutoshi SASAKI

IPC: C08J9/228

CPC classification number: C08J9/228 ,  B29C44/04 ,  B29C44/3461 ,  B29C44/445 ,  C08J9/0061 ,  C08J9/0066 ,  C08J9/16 ,  C08J9/224 ,  C08J9/232 ,  C08J2323/02 ,  C08J2323/06 ,  C08J2323/14 ,  C08J2323/20 ,  C08J2423/02 ,  C08J2423/26 ,  Y10T428/2998

Abstract: An inorganic filler-containing, polyolefin-based resin expanded bead having an expanded core layer of a first polyolefin-based resin, and a cover layer of a second polyolefin-based resin that covers the expanded core layer, wherein a weight ratio of the cover layer to the expanded core layer is 1:99 to 20:80, the expanded core layer contains an inorganic filler in a weight percentage amount of 5 to 90%, and the cover layer contains no inorganic filler or contains an inorganic filler in a weight percentage amount lower than that in the expanded core layer.

Abstract translation: 1.一种无机填料的聚烯烃类树脂发泡珠，其具有第一聚烯烃系树脂的发泡芯层和覆盖所述发泡芯层的第二聚烯烃系树脂的覆盖层，所述覆盖层的重量比 发泡芯层为1:99〜20:80，发泡芯层含有重量百分比为5〜90％的无机填料，覆盖层不含无机填料或含有重量以下的无机填料 百分比低于膨胀核心层的百分比。