公开(公告)号：US12240956B2

公开(公告)日：2025-03-04

申请号：US17591725

申请日：2022-02-03

Applicant: JSP CORPORATION

Inventor： Takumi Sakamura ,  Hajime Ohta

IPC: C08J9/18 ,  B29C44/34 ,  C08J9/00 ,  C08J9/12 ,  B29K23/00

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.

公开(公告)号：US20250011561A1

公开(公告)日：2025-01-09

申请号：US18886548

申请日：2024-09-16

Applicant: JSP Corporation

Inventor： Tatsuya HAYASHI ,  Akinobu HIRA

IPC: C08J9/18

Abstract: A polyamide-based resin expanded bead comprising a foam layer formed by expanding a polyamide-based resin, wherein on a first DSC curve and a second DSC curve, the first DSC curve has a melting peak (intrinsic peak) having a peak top temperature on a low temperature side equal to or lower than a peak top temperature of a melting peak of the second DSC curve and a melting peak (high temperature peak) having a peak top temperature on a high temperature side exceeding the peak top temperature of the second DSC curve, and, the peak top temperature of the melting peak of the second DSC curve is 180° C. or higher and 280° C. or lower, and the polyamide-based resin expanded bead has an apparent density of 10 to 300 kg/m3 and a closed cell ratio of 85% or more.

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：US20240199834A1

公开(公告)日：2024-06-20

申请号：US18553641

申请日：2022-03-15

Applicant: JSP CORPORATION

Inventor： Yohei KANEKO ,  Hayato NAKAMURA

IPC: C08J9/228 ,  C08F232/06 ,  C08J9/00 ,  G10K11/162

CPC classification number: C08J9/228 ,  C08F232/06 ,  C08J9/0061 ,  G10K11/162 ,  C08J2201/028 ,  C08J2345/00

Abstract: A porous body including, as a base resin, a crosslinked polymer obtained by crosslinking a polymer of an acrylic monomer and/or a styrene-based monomer. A storage modulus of the porous body is 5 kPa or more and 2000 kPa or less at 23° C., an apparent density of the porous body is 10 kg/m3 or more and 250 kg/m3 or less, and a molecular weight between crosslinking points of the crosslinked polymer is 1.0×104 or more.

公开(公告)号：US20240166836A1

公开(公告)日：2024-05-23

申请号：US18553026

申请日：2022-03-01

Applicant: JSP Corporation

Inventor： Tatsuya HAYASHI

IPC: C08J9/16 ,  C08J9/00

CPC classification number: C08J9/16 ,  C08J9/0052 ,  C08J9/0066 ,  C08J2205/052 ,  C08J2377/06

Abstract: A method for producing a polyamide-based resin expanded bead, the method comprising expanding a polyamide-based resin bead using a physical blowing agent, wherein the polyamide-based resin bead comprises a coloring pigment and a higher fatty acid metal salt having 12 to 24 carbon atoms; a metal in the higher fatty acid metal salt is one or more metals selected from the group consisting of magnesium, aluminum, and zinc; and a content of the higher fatty acid metal salt in the polyamide-based resin bead is 500 to 5000 mass ppm.

公开(公告)号：US11952474B2

公开(公告)日：2024-04-09

申请号：US17289169

申请日：2019-10-02

Applicant: JSP Corporation

Inventor： Shota Takagi ,  Akinobu Hira

IPC: C08J9/18 ,  C08J9/00 ,  C08J9/228 ,  C08L53/00

CPC classification number: C08J9/18 ,  C08J9/0061 ,  C08J9/228 ,  C08L53/00 ,  C08J2203/22 ,  C08J2353/00 ,  C08J2423/06 ,  C08L2203/14

Abstract: Expanded beads are those including a mixture of an olefin-based thermoplastic elastomer and a polyethylene-based resin, wherein a melt flow rate MFR(I) of the olefin-based thermoplastic elastomer is 2-10 g/10 min; a difference ((MFR(II))−(MFR(I))) between a melt flow rate MFR(II) of the polyethylene-based resin and the melt flow rate MFR(I) of the olefin-based thermoplastic elastomer is 1-35 g/10 min; and a content of the polyethylene-based resin in the mixture is 3-40% by weight.

公开(公告)号：US11795286B2

公开(公告)日：2023-10-24

申请号：US16349236

申请日：2017-11-13

Applicant: JSP Corporation

Inventor： Shota Takagi ,  Masaharu Oikawa

IPC: C08J9/232 ,  C08J9/18 ,  C08L53/00 ,  C08J9/228 ,  A43B13/04

CPC classification number: C08J9/232 ,  C08J9/18 ,  C08J9/228 ,  C08L53/00 ,  A43B13/04 ,  C08J2201/026 ,  C08J2203/22 ,  C08J2353/00

Abstract: The present invention relates to an in-mold expanded beads molded article of expanded beads of an olefin thermoplastic elastomer, a cushion for shoe sole, and a method of producing expanded beads provided with through-holes and composed of a block copolymer of a polyethylene block and an ethylene/α-olefin copolymer block, and with respect to the in-mold expanded beads molded article of expanded beads of an olefin thermoplastic elastomer, a voidage of the expanded beads molded article is 5 to 40%; a density of the expanded beads molded article is 30 to 150 g/L; and a flexural modulus of the olefin thermoplastic elastomer that constitutes the expanded beads molded article is 10 to 100 MPa.

公开(公告)号：US20230167260A1

公开(公告)日：2023-06-01

申请号：US17995082

申请日：2021-03-26

Applicant: JSP Corporation

Inventor： Keiichi HASHIMOTO ,  Katsunori HISAMATSU ,  Shogo IWASAKI

IPC: C08J9/228 ,  C08J9/00 ,  C08J9/224 ,  B60N2/70

CPC classification number: C08J9/228 ,  C08J9/0061 ,  C08J9/224 ,  B60N2/70 ,  C08J2323/12 ,  C08J2423/06 ,  C08J2203/22

Abstract: A vehicle seat core material includes a molded article that includes thermoplastic resin expanded beads. The molded article has a substantially rectangular shape in a top view, and has a front side and a rear side opposite the front side. The molded article has an average density (Z) of 20 kg/m3 to 50 kg/m3. The molded article includes, on the rear side of the molded article, a rear thin portion having a thickness of 10 mm to 40 mm, the thickness of the rear thin portion being smaller than an average thickness of the molded article. A ratio (Y/Z) of a density (Y) of the rear thin portion to the average density (Z) of the molded article is 1.05 to 3. The rear thin portion of the molded article has a fusion rate of 70% or more.

公开(公告)号：US11633942B2

公开(公告)日：2023-04-25

申请号：US17490175

申请日：2021-09-30

Applicant: JSP CORPORATION

Inventor： Ryuichi Taniguchi ,  Hirotoshi Kakuta ,  Takashi Ori

IPC: B32B27/06 ,  B29C48/00 ,  B29C48/07 ,  B29C48/21 ,  B32B5/18 ,  B32B27/32 ,  B29C44/24 ,  B29L9/00 ,  B29L7/00

Abstract: A laminated foam sheet having a polyethylene resin foam layer and an antistatic polyethylene layer laminated on one or both sides thereof is produced by coextruding melts for respective layers, wherein the melt for the antistatic layer contains a polyethylene resin, an ionomer resin antistatic agent and a specific amount of volatile plasticizer blend containing an alcohol and a saturated hydrocarbon or a dialkyl ether. The antistatic layer of the obtained laminated foam sheet has specific morphology.

公开(公告)号：US11535738B2

公开(公告)日：2022-12-27

申请号：US16638806

申请日：2018-07-18

Applicant: JSP CORPORATION

Inventor： Ryosuke Itagaki ,  Mitsuhiro Akiyama

IPC: C08L33/08 ,  C08L25/06 ,  C08L69/00 ,  B29C59/04

Abstract: A resin sheet of the present invention is a checker glass-like resin sheet made of a transparent thermoplastic resin, and includes a plurality of sectional arch-shaped elongated protrusions extending in one direction are regularly arranged in rows on, one surface of the resin sheet; and a plurality of sectional arch-shaped elongated protrusions extending in a direction perpendicular to the protrusions arranged on the one surface are regularly arranged in rows, on another surface of the resin sheet, in which an arithmetic average waviness (Wa) at a vertex of the protrusion in a direction in which the protrusion extends is 20 μm or less on both surfaces of the resin sheet. Accordingly, there is provided a resin sheet that can be used as an alternative to checker glass and has a certain degree of visibility from a short distance while having a shielding property from a long distance.