公开(公告)号：US12152121B2

公开(公告)日：2024-11-26

申请号：US17995082

申请日：2021-03-26

Applicant: JSP Corporation

Inventor： Keiichi Hashimoto ,  Katsunori Hisamatsu ,  Shogo Iwasaki

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

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：US20240239086A1

公开(公告)日：2024-07-18

申请号：US17927935

申请日：2021-05-28

Applicant: JSP CORPORATION

Inventor： Ryohei TAKEUCHI ,  Takashi NISHIMOTO

IPC: B32B27/08 ,  B29C48/00 ,  B29C48/21 ,  B29K23/00 ,  B29K25/00 ,  B29K105/00 ,  B32B27/06 ,  B32B27/18 ,  B32B27/32 ,  B32B37/14 ,  B32B37/15 ,  B32B38/00

CPC classification number: B32B27/08 ,  B29C48/0012 ,  B29C48/022 ,  B29C48/21 ,  B32B27/065 ,  B32B27/18 ,  B32B27/32 ,  B32B37/144 ,  B32B37/153 ,  B29K2023/0633 ,  B29K2025/04 ,  B29K2105/0008 ,  B32B2038/0084 ,  B32B2250/05 ,  B32B2250/246 ,  B32B2250/40 ,  B32B2260/046 ,  B32B2266/025 ,  B32B2270/00 ,  B32B2305/022 ,  B32B2307/21 ,  B32B2307/546 ,  B32B2307/746 ,  B32B2323/046 ,  B32B2325/00 ,  B32B2553/00

Abstract: The multilayer foam sheet has a surface resistivity of 1×1013Ω or less and has a foam layer and resin layers that are laminated on both surfaces of the foam layer. The resin layers each have a multilayer structure formed from a surface layer and an intermediate layer that is positioned between the surface layer and the foam layer. The foam layer includes a polyethylene-based resin PE2. The intermediate layers are configured from an antistatic mixture containing a polyethylene-based resin PE3 and a polymeric antistatic agent. The surface layers are configured from a mixed resin containing a polyethylene-based resin PE4 and a polystyrene-based resin, and substantially do not contain the polymeric antistatic agent. The polystyrene-based resin content of the mixed resin is 3-35 wt %.

公开(公告)号：US20240209171A1

公开(公告)日：2024-06-27

申请号：US18558025

申请日：2022-04-27

Applicant: JSP Corporation

Inventor： Pascal DZIKOWSKI ,  Jan JANOUŠEK

IPC: C08J9/18 ,  C08J9/228

CPC classification number: C08J9/18 ,  C08J9/228 ,  C08J2201/032 ,  C08J2201/034 ,  C08J2323/06 ,  C08J2323/12 ,  C08J2323/16

Abstract: The invention relates to a method for producing cellular plastic particles, including the steps of: —providing a plastic material in the form of pre-expanded plastic material particles, —loading the pre-expanded plastic material particles with a blowing agent under the influence of pressure, —expanding the pre-expanded plastic material particles loaded with blowing agent in order to produce cellular plastic particles, more particularly, cellular plastic particles having lower density, under the influence of temperature, in which the expanding of the plastic material particles loaded with blowing agent is carried out under the influence of temperature by irradiation of the plastic material particles loaded with blowing agent with high-energy thermal radiation, more particularly, infrared radiation.

公开(公告)号：US11965084B2

公开(公告)日：2024-04-23

申请号：US17274530

申请日：2018-09-21

Applicant: JSP CORPORATION

Inventor： Masahiro Gomibuchi ,  Jinichiro Noro

IPC: C08L23/14 ,  C08J9/12

CPC classification number: C08L23/14 ,  C08J9/122 ,  C08J2323/14 ,  C08J2423/14 ,  C08L2205/03 ,  C08L2207/04 ,  C08L2207/20

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.

公开(公告)号：US20240124674A1

公开(公告)日：2024-04-18

申请号：US18392071

申请日：2023-12-21

Applicant: JSP CORPORATION

Inventor： Takumi SAKAMURA ,  Hajime OHTA

IPC: C08J9/228

CPC classification number: C08J9/228 ,  C08J2205/052 ,  C08J2323/16 ,  C08J2423/20

Abstract: A method for producing a molded article of expanded beads includes filling tubular polypropylene-based resin expanded beads each having a through-hole in a mold, and supplying a heating medium to fusion-bond the expanded beads to each other. The expanded beads have a foamed layer constituted by polypropylene-based resin. A closed cell of the expanded beads is 90% or more. An average hole diameter (d) of through-holes of the expanded beads is less than 1 mm. A ratio [d/D] of the average hole diameter (d) to an average outer diameter (D) of the expanded beads is 0.4 or less. An open cell content of the molded article of expanded beads is 2.5% or more and 12% or less.

公开(公告)号：US20240084090A1

公开(公告)日：2024-03-14

申请号：US18240196

申请日：2023-08-30

Applicant: JSP Corporation

Inventor： Shobu YAMASAKI ,  Yosuke ITO

IPC: C08J9/18 ,  C08J9/00 ,  C08J9/12 ,  C08J9/232 ,  C08K13/02

CPC classification number: C08J9/18 ,  C08J9/0004 ,  C08J9/0023 ,  C08J9/0028 ,  C08J9/0061 ,  C08J9/122 ,  C08J9/232 ,  C08K13/02 ,  C08J2203/02 ,  C08J2205/044 ,  C08J2323/12 ,  C08J2379/02 ,  C08K3/04

Abstract: An expanded polypropylene resin bead contains an inorganic pigment, a hindered amine compound, and an ultraviolet light absorber. The ultraviolet light absorber contains an ultraviolet light absorber A having a molecular weight of 360 or more, and a content of the ultraviolet light absorber A in the expanded polypropylene resin bead is 0.010% by mass or more and 2% by mass or less. An expanded polypropylene resin beads molded article is produced by in-mold molding of the expanded polypropylene resin bead.

公开(公告)号：US20240076464A1

公开(公告)日：2024-03-07

申请号：US18549026

申请日：2022-03-03

Applicant: JSP CORPORATION

Inventor： TATSUYA HAYASHI ,  AKINOBU HIRA

IPC: C08J9/18 ,  B29C44/34

CPC classification number: C08J9/18 ,  B29C44/3461 ,  B29K2023/0625

Abstract: Polyethylene resin foamed particles according to the present invention are obtained by using, as a base material resin, a non-crosslinked linear low density polyethylene. The linear low density polyethylene is a copolymer of ethylene and an α-olefin having 8 carbon atoms, and has a melt flow rate and a density in specified ranges. The foamed particle has an average foam size within a specified range, and has a crystal structure that causes an intrinsic peak and a high temperature peak to appear in the first round of a DSC curve obtained under a specific condition. The total fusion heat quantity (ΔH1) determined from the sum total of a fusion heat quantity (ΔHi) of the intrinsic peak and the fusion heat quantity (ΔHh) of the high temperature peak is within a specified range.

公开(公告)号：US11904579B2

公开(公告)日：2024-02-20

申请号：US17905890

申请日：2021-02-12

Applicant: JSP CORPORATION

Inventor： Takashi Oi ,  Hajime Ohta

IPC: B32B27/08 ,  B32B27/32

CPC classification number: B32B27/08 ,  B32B27/32 ,  B32B2250/02 ,  B32B2266/025 ,  B32B2553/00

Abstract: A molded article of polypropylene-based resin expanded beads, obtained by in-mold molding of the polypropylene-based resin expanded beads, each bead including: a core layer, in a foamed state, having a polypropylene-based resin; and a covering layer, which covers the core layer, having a polyethylene-based resin. A molded article magnification X [times] of the molded article is 55 times to 90 times, a value of a product X·σ50 of a 50% compressive stress σ50 [kPa] and the molded article magnification X is 6500 or more, and a 5% compressive stress σ5 of the expanded beads molded article is 5 kPa to 25 kPa.

公开(公告)号：US20240042743A1

公开(公告)日：2024-02-08

申请号：US18258874

申请日：2021-10-01

Applicant: JSP CORPORATION

Inventor： Hirotoshi KAKUTA ,  Mikidai FUJITA ,  Naoya KATSUYAMA

IPC: B32B27/06 ,  B32B27/32 ,  B32B27/30 ,  B32B37/15 ,  B32B5/18

CPC classification number: B32B27/065 ,  B32B27/32 ,  B32B27/30 ,  B32B37/153 ,  B32B5/18 ,  B32B2250/02 ,  B32B2264/108 ,  B32B2266/025 ,  B32B2305/022 ,  B32B2307/202 ,  B32B2323/046 ,  B32B2307/7376 ,  B32B2331/04 ,  B32B2333/12 ,  B32B2439/00

Abstract: A polyethylene-based resin multilayer foam sheet may include a polyethylene-based resin foam layer containing a polyethylene-based resin (A) as a base resin, and a conductive layer laminated on at least one side of the foam layer. The conductive layer contains: a mixed resin of one or more polyethylenes (B) of low-density polyethylenes and/or linear low-density polyethylenes and an ethylene-based copolymer (C) having a structural unit derived from ethylene and a structural unit derived from a monomer having a polar group; and conductive carbon. The conductive carbon blended in the conductive layer may be in a range of from 3 to 15 wt. %. The difference, TmB−TmC, between the melting point TmB of the polyethylene (B) and the melting point TmC of the ethylene-based copolymer (C) each contained in the conductive layer may be in a range of from 30 to 80° C.

公开(公告)号：US20230348693A1

公开(公告)日：2023-11-02

申请号：US18040853

申请日：2021-05-25

Applicant: JSP CORPORATION

Inventor： Shobu YAMASAKI

IPC: C08K5/17 ,  C08K3/04 ,  C08J9/16

CPC classification number: C08K5/17 ,  C08K3/04 ,  C08J9/16 ,  C08J2323/14

Abstract: A polyolefin-based resin expanded bead contains a base resin containing a polyolefin-based resin as a main component, carbon black, and a flame-retardant. A bulk density of the polyolefin-based resin expanded beads is 10 to 100 kg/m3. A blending amount of the carbon black is 0.5 to 10 parts by mass based on 100 parts by mass of the base resin. The flame-retardant contains a hindered amine-based compound represented by the following general formula (I), and a blending amount of the hindered amine-based compound is 0.01 to 1 parts by mass based on 100 parts by mass of the base resin.