Patents Assigned to JSP Corporation
  • Patent number: 12152121
    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: Grant
    Filed: March 26, 2021
    Date of Patent: November 26, 2024
    Assignee: JSP Corporation
    Inventors: Keiichi Hashimoto, Katsunori Hisamatsu, Shogo Iwasaki
  • Patent number: 12129350
    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.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: October 29, 2024
    Assignee: JSP Corporation
    Inventors: Tatsuya Hayashi, Akinobu Hira
  • Publication number: 20240209171
    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.
    Type: Application
    Filed: April 27, 2022
    Publication date: June 27, 2024
    Applicant: JSP Corporation
    Inventors: Pascal DZIKOWSKI, Jan JANOUŠEK
  • Patent number: 11952474
    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.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: April 9, 2024
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Akinobu Hira
  • 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
  • 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: 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
  • 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: 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
  • Patent number: 11560458
    Abstract: Polyamide-based resin expanded beads having a crystallite size of more than 8 nm as measured by X-ray diffraction method are provided.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: January 24, 2023
    Assignee: JSP Corporation
    Inventor: Tatsuya Hayashi
  • Patent number: 11466137
    Abstract: The present invention is concerned with expanded beads that are olefin-based thermoplastic elastomer expanded beads containing a coloring agent, wherein an apparent density of the expanded beads is 40 to 300 g/L, and an average surface layer membrane thickness (a) is 3 to 25 ?m, and a molded article thereof, and is able to provide expanded beads capable of producing an expanded beads molded article which is excellent in in-mold moldability and excellent in tensile characteristics and an expanded beads molded article using the expanded beads.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: October 11, 2022
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Patent number: 11254774
    Abstract: The present invention relates to a styrene-based resin having a weight average molecular weight Mw? as determined by the GPC-MALS method of 1,000,000 or more and 5,000,000 or less, a degree of long-chain branching of 0.2 or more per 1,000 styrene units, and a tetrahydrofuran-insoluble matter of 0.1% by weight or less (including 0), the styrene-based resin being free from a component derived from a polyfunctional monomer in a molecular chain thereof.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: February 22, 2022
    Assignee: JSP Corporation
    Inventors: Kenji Haraguchi, Jumpei Goto
  • Patent number: 11225562
    Abstract: The present invention provides expanded beads comprising a crosslinked multi-block copolymer containing an ethylene block and an ethylene-?-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 ?m, and an average surface layer thickness (b) of 3 to 27 ?m, 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.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 18, 2022
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Patent number: 11208537
    Abstract: The present invention provides expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T1?T2) between a melting peak temperature (T1) and a melting peak temperature (T2) is from 0 to 8° C., wherein the melting peak temperature (T1) is a melting peak temperature at the time of first heating in a DSC curve obtained by heating the expanded beads from 20° C. to 260° C. at a heating rate of 10° C./min, the melting peak temperature (T2) is a melting peak temperature at the time of second heating in a DSC curve obtained by cooling from 260° C. to 20° C. at a cooling rate of 10° C./min after the first heating and further heating again from 20° C. to 260° C. at a heating rate of 10° C./min, and the DSC curves are obtained by the heat flux differential scanning calorimetry in conformity with JIS K7121-1987.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: December 28, 2021
    Assignee: JSP Corporation
    Inventors: Tatsuya Hayashi, Nobumasa Koshita, Masaharu Oikawa
  • Patent number: 11174365
    Abstract: The present invention is concerned with expanded beads of a block copolymer of a polyethylene block and an ethylene/?-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.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: November 16, 2021
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Patent number: 11168194
    Abstract: The present invention relates to thermoplastic olefin elastomer expanded beads, having an average aspect ratio of 1.10 or less and an average circularity of 0.985 or more. The thermoplastic olefin elastomer expanded beads preferably have a crystal structure such that a melting peak inherent in the thermoplastic olefin elastomer (inherent peak) and one or more melting peaks on a higher temperature side than the inherent peak (high temperature peaks) appear on a DSC curve obtained when heating the expanded beads from 23° C. to 200° C. at a heating rate of 10° C./min.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: November 9, 2021
    Assignee: JSP Corporation
    Inventors: Shota Takagi, Masaharu Oikawa
  • Patent number: 11111351
    Abstract: The present invention relates to an expanded beads molded article, which is obtained through in-mold molding of expanded thermoplastic elastomer beads, has voids, and has a density of 150 to 300 kg/m3 and a voidage of 10 to 70% by volume.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: September 7, 2021
    Assignee: JSP Corporation
    Inventors: Nobumasa Koshita, Masaharu Oikawa, Tatsuya Hayashi
  • Patent number: 10899904
    Abstract: The present invention is concerned with expanded beads of thermoplastic polyurethane in which a water-soluble anionic surfactant is attached at 50 mg/m2 to 1,000 mg/m2 onto the surfaces of expanded beads of thermoplastic polyurethane having a dispersant attached thereto; and a method for producing an expanded beads molded article, including filling the expanded beads of thermoplastic polyurethane in a mold for molding and heating with a water vapor to mutually fuse the expanded beads with each other. The present invention provides expanded beads from which an expanded TPU beads molded article having excellent tensile strength and a method for producing an expanded TPU beads molded article.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: January 26, 2021
    Assignee: JSP Corporation
    Inventors: Masaharu Oikawa, Koki Nishijima, Nobumasa Koshita, Tatsuya Hayashi
  • Patent number: 10875436
    Abstract: Provided is a core material of a seat cushion for a vehicle, including: a thermoplastic resin expanded beads molded article having a substantially rectangular shape in top view, that has thick portions on a front side and both sides of a circumferential portion thereof, and that has an occupant seating portion on an upper surface in an inner region thereof; and an annular frame member that is insert-molded at the circumferential portion of the thermoplastic resin expanded beads molded article. In the thermoplastic resin expanded beads molded article, formed are first slits having: slit pieces that extend along a front frame member at a position in front of the occupant sitting part and inside from the front frame part; and slit pieces that extend along a side frame member at a position outside from the occupant sitting part and inside from a side frame part.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: December 29, 2020
    Assignee: JSP Corporation
    Inventors: Atsuo Takayama, Takamitsu Matsumoto