Patents Assigned to JSP Corporation
  • Publication number: 20220192110
    Abstract: The medium for plant cultivation according to the present invention includes a bag body, and a crushed material obtained by crushing a foam body made of an aliphatic polyester-based resin and packed in the bag body in a compressed state, and in the medium a ratio of the bulk density of the crushed material after being packed in the bag body to the bulk density of the crushed material before being packed in the bag body is larger than 1 and 2 or less.
    Type: Application
    Filed: March 31, 2020
    Publication date: June 23, 2022
    Applicant: JSP CORPORATION
    Inventors: Hidehiro SASAKI, Joji OHNUKI
  • Patent number: 11338546
    Abstract: A skin-covered foamed molded article having excellent lightweight property, bending rigidity, and favorable dimensional stability, which includes: a skin material composed of a hollow molded body produced by blow-molding an extruded parison; and an expanded bead molded article located inside the skin material, wherein the skin material has an average wall thickness of from 1.0 mm to 5.0 mm, the skin material includes a glass fiber-reinforced polypropylene-based resin containing glass fiber in a range of from 5 mass % to 30 mass %, the glass fiber has a weight-average fiber length of from 0.4 mm to 1.5 mm, the expanded bead molded article includes a polypropylene-based resin, the peeling strength between the skin material and the expanded bead molded article is 0.1 MPa or higher, and the longitudinal linear expansion coefficient of the skin-covered foamed molded article (100) at from 23° C. to 80° C. is 7×10?5/° C. or lower.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: May 24, 2022
    Assignee: JSP CORPORATION
    Inventor: Tomoo Tokiwa
  • Patent number: 11305519
    Abstract: A laminated foam sheet obtained by a coextrusion lamination method and having a polyethylene foam layer, and an antistatic layer laminated on at least one side of the foam layer. The antistatic layer contains a polyethylene resin, an ionomer resin and a polyalkylene glycol and has such specific morphology that the polyethylene resin forms a continuous phase and the ionomer resin forms small dispersed phases dispersed in the continuous phase.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: April 19, 2022
    Assignee: JSP CORPORATION
    Inventors: Takashi Nishimoto, Ryohei Takeuchi
  • Patent number: 11273621
    Abstract: A laminated foam sheet having a polyethylene resin foam layer and an outer layer laminated on each side of the foam layer, each outer layer being composed of an outermost surface polyethylene resin layer and an intermediate polyethylene resin layer which is positioned between the outermost surface layer and the foam layer and which contains a specific amount of a polymeric antistatic agent relative to the weight of the intermediate layer and to the basis weight of each of the intermediate layer and outermost surface layer.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: March 15, 2022
    Assignee: JSP CORPORATION
    Inventors: Ryuichi Taniguchi, Hirotoshi Kakuta
  • 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
  • Publication number: 20220016873
    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: Application
    Filed: September 30, 2021
    Publication date: January 20, 2022
    Applicant: JSP CORPORATION
    Inventors: Ryuichi TANIGUCHI, Hirotoshi KAKUTA, Takashi ORI
  • Patent number: 11224292
    Abstract: A seat core material having reduced deformation, extremely excellent dimensional accuracy, sense of unity, and strength is thus provided. The frame member and the foamed particle molding are integrated in the seat core material.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: January 18, 2022
    Assignee: JSP CORPORATION
    Inventors: Keiichi Hashimoto, Katsunori Hisamatsu, Atsuo Takayama
  • 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: 11161328
    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: January 13, 2020
    Date of Patent: November 2, 2021
    Assignee: JSP CORPORATION
    Inventors: Ryuichi Taniguchi, Hirotoshi Kakuta, Takashi Ori
  • Publication number: 20210309843
    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.
    Type: Application
    Filed: September 21, 2018
    Publication date: October 7, 2021
    Applicant: JSP CORPORATION
    Inventors: Masahiro GOMIBUCHI, Jinichiro NORO
  • Publication number: 20210300005
    Abstract: A laminated article includes a thermoplastic resin expanded beads molded layer A having a volume Va and a tensile modulus TMa which is 2 to 100 MPa, and a thermoplastic elastomer expanded beads molded layer B having a volume Vb and a tensile modulus TMb which is 0.05 MPa or more and less than 2 MPa, the layers A and B being laminated and bonded to each other. Va:Vb is 90:10 to 50:50 and TMb/TMa is 0.025 or less.
    Type: Application
    Filed: July 12, 2019
    Publication date: September 30, 2021
    Applicant: JSP CORPORATION
    Inventors: Shota TAKAGi, Akinobu HIRA
  • 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
  • Publication number: 20210253818
    Abstract: The polyamide-based resin expanded beads are expanded beads including a polyamide-based resin as a base resin, in which the average value of bead weight of the expanded beads is 0.5 mg or more and 8 mg or less, the coefficient of variation of the bead weight of the expanded beads is 10% or less, and the average value of the ratio of a long diameter to a short diameter (a long diameter/a short diameter) of the expanded beads measured with a projection image photographing type bead size distribution analyzer is 1 or more and 1.5 or less, the coefficient of variation of the ratio (a long diameter/a short diameter) is 12% or less, the average value of the a short diameter is 1 mm or more and 4 mm or less, and the coefficient of variation of the a short diameter is 10% or less.
    Type: Application
    Filed: February 5, 2021
    Publication date: August 19, 2021
    Applicant: JSP CORPORATION
    Inventor: Tatsuya HAYASHI
  • Patent number: 11052800
    Abstract: A seat core material of the present invention is a seat core material for vehicle including a thermoplastic resin expanded bead article and a frame member embedded in a peripheral edge portion of the expanded bead article. The frame member includes a front frame part, a rear frame part, and two side frame parts interconnecting the front frame part and the rear frame part. Slits crossing the two side frame parts are formed along a longitudinal direction with continuous parts left intact outside the side frame parts on both ends of the expanded bead article. The slit penetrates or does not penetrate the expanded bead article in a thickness direction. The continuous parts are formed in a curved shape or a bent shape.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: July 6, 2021
    Assignee: JSP CORPORATION
    Inventors: Atsuo Takayama, Keiichi Hashimoto, Katsunori Hisamatsu
  • Publication number: 20210130600
    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 ?m 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.
    Type: Application
    Filed: July 18, 2018
    Publication date: May 6, 2021
    Applicant: JSP CORPORATION
    Inventors: Ryosuke ITAGAKI, Mitsuhiro AKIYAMA
  • Patent number: 10974435
    Abstract: A method for producing a foamed blow-molded article, which includes extruding a physical blowing agent-containing foamable molten resin downwardly through a annular die to form a tubular foamed parison, clamping the foamed parison between split molds, and then blow molding it. At the latest before completion of the clamping of the foamed parison between the split molds, a gas is blown toward an inner peripheral surface of an upper portion of the foamed parison, the bottom portion of which has been closed, from a gas ejection outlet located within the foamed parison at a position immediately below the annular die to widen the foamed parison.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: April 13, 2021
    Assignee: JSP CORPORATION
    Inventors: Masahiro Gomibuchi, Toshio Morita
  • 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