Patents Assigned to JSP Corporation
  • Patent number: 11904579
    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·?50 of a 50% compressive stress ?50 [kPa] and the molded article magnification X is 6500 or more, and a 5% compressive stress ?5 of the expanded beads molded article is 5 kPa to 25 kPa.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: February 20, 2024
    Assignee: JSP CORPORATION
    Inventors: Takashi Oi, Hajime Ohta
  • Publication number: 20240042743
    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.
    Type: Application
    Filed: October 1, 2021
    Publication date: February 8, 2024
    Applicant: JSP CORPORATION
    Inventors: Hirotoshi KAKUTA, Mikidai FUJITA, Naoya KATSUYAMA
  • Patent number: 11882940
    Abstract: A cushion body for sitting is provided which can offer good feeling of sitting even to many unspecified users of various body shapes and allow them to be seated more comfortably. A cushion body for sitting (1) includes: a base part (2) having a sitting surface (S1) formed of a curved surface that is curved concavely to support, from below, the buttocks of a seated person in a seated posture; and a pair of side supporting portions (3) each having a side supporting surface (S2) formed of a curved surface that is curved continuously from the sitting surface (S1) of the base part (2), where the pair of side supporting portions (3) project from sides of the base part (2) such that the side supporting portions (3) can be bent and deformed by a load applied to the side supporting surfaces (S2), so as to support both the left and right parts of the buttocks of the seated person in the seated posture.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: January 30, 2024
    Assignee: JSP Corporation
    Inventor: Seishiro Murata
  • Publication number: 20240025093
    Abstract: An expanded bead of polypropylene-based resin formed with a through hole that is defined by an inner peripheral surface and that has an average hole diameter of 1 mm or less. The expanded bead has a closed cell content of 85% or more, an average cell diameter of 50 to 300 ?m and an inner surface portion that extends along the inner peripheral surface that has an average cell diameter of 5 to 150 ?m which is smaller than the average cell diameter of the expanded bead.
    Type: Application
    Filed: July 3, 2023
    Publication date: January 25, 2024
    Applicant: JSP CORPORATION
    Inventor: Hisashi MASUMOTO
  • Publication number: 20240018325
    Abstract: A thermoplastic resin expanded bead and a molded article composed of the thermoplastic resin expanded beads are provided. The expanded bead includes a foam layer containing a thermoplastic resin. The expanded bead has a columnar shape, and has two or more and eight or less through-holes penetrating in the axial direction thereof. A ratio Ct/A of a total cross-sectional area Ct of the through-holes to a cross-sectional area A of the expanded bead in a cut surface obtained by cutting the expanded bead along a plane perpendicular to the axial direction at the center in the axial direction is 0.02 or more and 0.15 or less.
    Type: Application
    Filed: July 10, 2023
    Publication date: January 18, 2024
    Applicant: JSP CORPORATION
    Inventors: Takumi SAKAMURA, Hajime OHTA
  • Publication number: 20230407035
    Abstract: A method for producing polyamide-based resin multi-stage expanded beads includes an internal pressure applying step of placing polyamide-based resin expanded beads in a pressure-resistant container, impregnating the polyamide-based resin expanded beads with a physical blowing agent in the pressure-resistant container to apply internal pressure higher than atmospheric pressure; and a heating and foaming step of heating and expanding the polyamide-based resin expanded beads to which internal pressure is applied obtained in the internal pressure applying step to obtain polyamide-based resin multi-stage expanded beads having apparent density lower than that of polyamide-based resin expanded beads used in the internal pressure applying step, in the internal pressure applying step, polyamide-based resin expanded beads in a wet state having a water content of 1% or more being impregnated with the physical blowing agent at a temperature higher than change-point temperature of storage modulus of the polyamide-based re
    Type: Application
    Filed: October 13, 2021
    Publication date: December 21, 2023
    Applicant: JSP CORPORATION
    Inventor: Tetsu OTSUKA
  • Publication number: 20230348693
    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.
    Type: Application
    Filed: May 25, 2021
    Publication date: November 2, 2023
    Applicant: JSP CORPORATION
    Inventor: Shobu YAMASAKI
  • Patent number: 11795286
    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/?-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.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: October 24, 2023
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Patent number: 11732101
    Abstract: An expanded bead having a through hole and including a foamed core layer which defines the through hole therein and which is constituted of a resin composition containing two kinds of polypropylene-based resins having different melting points, and a cover layer covering the foamed core layer and constituted of a polyolefin-based resin. The expanded bead gives a DSC curve in which an endothermic peak intrinsic to the resin composition and another endothermic peak on a higher temperature side thereof appear in a specific heat of fusion ratio. Molded articles include a multiplicity of the expanded beads.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: August 22, 2023
    Assignee: JSP CORPORATION
    Inventors: Tomohito Shimada, Hajime Ohta
  • Publication number: 20230203263
    Abstract: A molded article of polyolefin-based resin expanded beads having excellent appearance and further suppressed color unevenness is provided. Polyolefin-based resin expanded beads obtained by expanding polyolefin-based resin particles including one or two or more metal borates selected from zinc borate and magnesium borate, wherein the particles of the metal borate has an arithmetic average particle diameter based on the number of 1 ?m or more, and a number rate of the particles of the metal borate having a particle diameter of 5 ?m or more is 20% or less.
    Type: Application
    Filed: March 9, 2020
    Publication date: June 29, 2023
    Applicant: JSP CORPORATION
    Inventors: Takumi SAKAMURA, Naoki MOCHIDA, Akinobu HIRA
  • Patent number: 11680148
    Abstract: Provided are composite particles in which reinforcing fibers adhere to the surface of thermoplastic resin expanded beads via a thermosetting resin being in an uncured state, a cured product of the composite particles, an in-mold molded article of the composite particles, a laminate of the composite particles and a reinforcing fiber sheet material, a composite of the composite particles, and a method for producing composite particles.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: June 20, 2023
    Assignee: JSP Corporation
    Inventors: Toshio Morita, Hidehiro Sasaki, Tomohiro Hoshino
  • Publication number: 20230167260
    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.
    Type: Application
    Filed: March 26, 2021
    Publication date: June 1, 2023
    Applicant: JSP Corporation
    Inventors: Keiichi HASHIMOTO, Katsunori HISAMATSU, Shogo IWASAKI
  • Publication number: 20230151177
    Abstract: A crosslinked olefin-based thermoplastic elastomer expanded bead including a base polymer having an olefin-based thermoplastic elastomer and a brominated bisphenol-based flame retardant having a chemical structure represented by formula (1). A difference TmTPO-TFR is ?5° C. to 40° C., where TmTPO is a melting point of the olefin-based thermoplastic elastomer and TFR is the lower of a glass transition temperature TgFR and a melting point TmFR of the brominated bisphenol-based flame retardant. A xylene insoluble content is 5 mass % to 80 mass %.
    Type: Application
    Filed: March 11, 2021
    Publication date: May 18, 2023
    Applicant: JSP CORPORATION
    Inventor: Naoki MOCHIDA
  • Patent number: 11643519
    Abstract: The present invention relates to an expanded beads molded article containing a block copolymer of a polyethylene block and an ethylene-?-olefin copolymer block and having a density of 30 kg/m3 or more and less than 150 kg/m3 and a modulus of repulsion elasticity of 60% or more. The sole member of the present invention includes the expanded beads molded article of the present invention.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: May 9, 2023
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Patent number: 11633942
    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.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: April 25, 2023
    Assignee: JSP CORPORATION
    Inventors: Ryuichi Taniguchi, Hirotoshi Kakuta, Takashi Ori
  • Publication number: 20230119472
    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·?50 of a 50% compressive stress ?50 [kPa] and the molded article magnification X is 6500 or more, and a 5% compressive stress ?5 of the expanded beads molded article is 5 kPa to 25 kPa.
    Type: Application
    Filed: February 12, 2021
    Publication date: April 20, 2023
    Applicant: JSP CORPORATION
    Inventors: Takashi OI, Hajime OHTA
  • Publication number: 20230074915
    Abstract: An expanded bead having a through hole and including a foamed core layer which defines the through hole therein and which is constituted of a resin composition containing two kinds of polypropylene-based resins having different melting points, and a cover layer covering the foamed core layer and constituted of a polyolefin-based resin. The expanded bead gives a DSC curve in which an endothermic peak intrinsic to the resin composition and another endothermic peak on a higher temperature side thereof appear in a specific heat of fusion ratio. Molded articles include a multiplicity of the expanded beads.
    Type: Application
    Filed: January 21, 2021
    Publication date: March 9, 2023
    Applicant: JSP CORPORATION
    Inventors: Tomohito SHIMADA, Hajime OHTA
  • Publication number: 20230075291
    Abstract: A HIPE foam may including a vinyl-based crosslinked polymer as a base material resin. The vinyl-based crosslinked polymer may be formed by crosslinking a polymer of a styrene-based monomer and/or an acryl-based monomer. An apparent density ? of the HIPE foam may be 35 kg/m3 or more and 500 kg/m3 or less. A molecular weight between crosslinking points of the vinyl-based crosslinked polymer forming the HIPE foam may be 2×103 or more and 2×105 or less. The HIPE foam may be used as, for example, a machinable material or an impact absorbing material.
    Type: Application
    Filed: February 17, 2021
    Publication date: March 9, 2023
    Applicant: JSP CORPORATION
    Inventors: Yohei KANEKO, Kenji HARAGUCHI
  • Patent number: 11597127
    Abstract: An expanded beads molded article containing a block copolymer of a polyethylene block and an ethylene-?-olefin copolymer block and having a density of 150 kg/m3 or more and 500 kg/m3 or less and a tensile strength of 0.5 MPa or more.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: March 7, 2023
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Publication number: 20230053755
    Abstract: Polyamide-based resin expanded beads contain a polyamide-based resin as a base material resin. The beads have a crystal structure, an intrinsic peak of the polyamide-based resin and a high-temperature peak having a peak top temperature on a higher temperature side than a peak top temperature of the intrinsic peak appear in a DSC curve obtained under a predetermined condition; an amount of heat of fusion of the high-temperature peak is within 5 J/g or more and 50 J/g or less; and a coefficient of variation of the amount of heat of fusion of the high-temperature peak is 20% or less. The beads are produced by in-mold molding. A method for producing the beads includes: impregnating a polyamide-based resin; and releasing expandable polyamide-based resin beads from a sealed container, a temperature in the sealed container is raised at a rate of 0.3° C. or higher and 1.5° C. or lower per 10 minutes.
    Type: Application
    Filed: February 1, 2021
    Publication date: February 23, 2023
    Applicant: JSP CORPORATION
    Inventor: Tatsuya HAYASHI