公开(公告)号：US20240309165A1

公开(公告)日：2024-09-19

申请号：US18278660

申请日：2021-12-21

Applicant: JSP CORPORATION

Inventor： Tokunobu NOHARA ,  Yasutaka ODE

IPC: C08J9/18 ,  C08J3/12 ,  C08J9/12 ,  C08J9/232 ,  C08K3/04 ,  C08K5/17

CPC classification number: C08J9/18 ,  C08J3/126 ,  C08J9/122 ,  C08J9/232 ,  C08K3/04 ,  C08K5/17 ,  C08J2203/22 ,  C08J2323/16

Abstract: A method for producing polypropylene-based resin expanded beads includes dispersion, blowing agent impregnation, and foaming steps. Beads used in the dispersion step include a core layer having a polypropylene-based resin as a base material resin, and a fusion-bonding layer covering core layer; the beads fusion-bonding layer includes carbon black and a NOR-type hindered amine; a carbon black blending ratio is adjusted to 0.5 wt % or more and 5 wt % or less; and an amine blending ratio of the beads is adjusted to 0.03 wt % or more and 0.5 wt % or less; the polypropylene-based resin expanded beads have a surface on which a fusion-bonding layer is located; the fusion-bonding layer includes the carbon black and hindered amine; a carbon black blending ratio is 0.5 wt % or more and 5 wt % or less; and a blending ratio of the hindered amine is 0.03 wt % or more and 0.5 wt % or less.

公开(公告)号：US20240158593A1

公开(公告)日：2024-05-16

申请号：US18278657

申请日：2021-12-21

Applicant: JSP CORPORATION

Inventor： Tokunobu NOHARA ,  Yasutaka ODE

IPC: C08J9/00 ,  C08J9/18 ,  C08J9/224 ,  C08J9/232 ,  C08K5/3492

CPC classification number: C08J9/0028 ,  C08J9/18 ,  C08J9/224 ,  C08J9/232 ,  C08K5/34926 ,  C08J2203/22 ,  C08J2323/14

Abstract: A polypropylene-based resin expanded beads configured to include an NOR type hindered amine and has a surface on which a thermoplastic polymer layer is located, in which a blending ratio of the amine in the expanded beads is 0.03 wt % or more and 0.5 wt % or less, and a blending ratio of the amine in the thermoplastic polymer layer is less than the blending ratio of the amine in the expanded beads. Further, the method for producing the expanded beads includes a covering and foaming step, in which in the resin beads to be obtained in the covering step, a blending ratio of the amine in the resin beads is adjusted to be 0.03 wt % or more and 0.5 wt % or less, and a blending ratio of the amine in a thermoplastic polymer layer is adjusted to be lower than the blending ratio of the amine in the resin beads.

公开(公告)号：US20160009888A1

公开(公告)日：2016-01-14

申请号：US14791885

申请日：2015-07-06

Applicant: JSP CORPORATION

Inventor： Masaharu OIKAWA ,  Tokunobu NOHARA ,  Nobumasa KOSHITA

IPC: C08J9/18 ,  C08J9/00

CPC classification number: C08J9/18 ,  C08J9/0019 ,  C08J9/0061 ,  C08J9/0066 ,  C08J9/122 ,  C08J9/232 ,  C08J2201/026 ,  C08J2201/034 ,  C08J2203/06 ,  C08J2205/052 ,  C08J2323/06 ,  C08J2463/02 ,  C08J2471/12 ,  C08J2481/06

Abstract: A method for producing cross-linked polyethylene resin expanded beads, including dispersing polyethylene resin particles containing a halogen-containing flame retardant in a dispersing medium in an autoclave, impregnating the dispersed resin particles with an organic peroxide and cross-linking the polyethylene resin therewith at a specific temperature range determined by the melting point of the polyethylene resin and by melting point or glass transition temperature of the flame retardant, impregnating the dispersed resin particles with a blowing agent, and then foaming and expanding the resulting cross-linked polyethylene-based resin particles.

Abstract translation: 一种生产交联聚乙烯树脂发泡珠的方法，包括将分散介质中含有含卤阻燃剂的聚乙烯树脂颗粒分散在高压釜中，用有机过氧化物浸渍分散的树脂颗粒，并将其与聚乙烯树脂交联 由聚乙烯树脂的熔点和阻燃剂的熔点或玻璃化转变温度确定的特定温度范围，用发泡剂浸渍分散的树脂颗粒，然后使所得的交联聚乙烯类树脂 粒子。

公开(公告)号：US20250002665A1

公开(公告)日：2025-01-02

申请号：US18700947

申请日：2022-09-13

Applicant: JSP CORPORATION

Inventor： Akinobu HIRA ,  Tokunobu NOHARA ,  Tatsuya HAYASHI

IPC: C08J9/18 ,  C08J9/12 ,  C08J9/232

Abstract: A polyethylene-based resin expanded bead including a non-crosslinked linear low-density polyethylene as a base resin. The density, heat of fusion, melting point, and melt flow rate measured under conditions of a temperature of 190° C. and a load of 2.16 kg of the linear low-density polyethylene fall within their respective predetermined ranges. The average cell diameter of the expanded beads is 50 μm or more and 180 μm or less.

公开(公告)号：US20250001657A1

公开(公告)日：2025-01-02

申请号：US18694740

申请日：2022-08-16

Applicant: JSP CORPORATION

Inventor： Akinobu HIRA ,  Tokunobu NOHARA

IPC: B29C44/34 ,  B29C44/02 ,  B29K23/00 ,  B29K105/04 ,  B29K507/04

Abstract: A method for producing polypropylene-based resin expanded beads containing a post-consumer recycled material of a polypropylene-based resin foamed molded article containing carbon black in order to enable provision of a black expanded beads molded article excellent in appearance and physical properties using a post-consumer recycled material of a polypropylene-based resin foamed molded article containing carbon black. The method includes: a mixing step of melt-mixing a polypropylene-based resin at 230° C. under a load of 2.16 kg and a polypropylene-based resin recovered materials including of a recovered materials of a post-consumer recycled material of a polypropylene-based resin foamed molded article with an extruder to obtain a mixture; an extrusion step; and a foaming step, wherein in the mixture, the polypropylene-based resin recovered materials contains carbon black.