公开(公告)号：US11254774B2

公开(公告)日：2022-02-22

申请号：US16631415

申请日：2018-07-20

申请人： JSP Corporation

发明人： Kenji Haraguchi ,  Jumpei Goto

IPC分类号： C08F257/02

摘要： 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. In a method for producing this styrene-based resin, in an impregnation step of adding a polymerization initiator and a styrene monomer in an aqueous medium, thereby impregnating the polymerization initiator and the styrene monomer in the seed particle at a temperature at which polymerization of the styrene monomer does not substantially proceed, the amount of the styrene monomer is 20 to 200 parts by weight based on 100 parts by weight of the seed particle; and in an additional impregnation polymerization step of graft polymerizing the styrene monomer on the styrene-based resin, the addition amount of the styrene monomer is 50 to 700 parts by weight based on 100 parts by weight of the seed particle, and the content of the styrene monomer in the seed particle is held at 10% by weight or less.

公开(公告)号：US20220016873A1

公开(公告)日：2022-01-20

申请号：US17490175

申请日：2021-09-30

申请人： JSP CORPORATION

发明人： Ryuichi TANIGUCHI ,  Hirotoshi KAKUTA ,  Takashi ORI

IPC分类号： B32B27/06 ,  B29C48/00 ,  B29C48/07 ,  B29C48/21 ,  B32B5/18 ,  B32B27/32

摘要： 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：US11052800B2

公开(公告)日：2021-07-06

申请号：US16486269

申请日：2018-02-15

申请人： JSP CORPORATION

发明人： Atsuo Takayama ,  Keiichi Hashimoto ,  Katsunori Hisamatsu

IPC分类号： B60N2/70

摘要： 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.

公开(公告)号：US10899904B2

公开(公告)日：2021-01-26

申请号：US16088746

申请日：2017-02-03

申请人： JSP Corporation

发明人： Masaharu Oikawa ,  Koki Nishijima ,  Nobumasa Koshita ,  Tatsuya Hayashi

IPC分类号： C08J9/236 ,  C08J9/224 ,  C08J9/18 ,  B29C44/34 ,  C08J9/232 ,  B29C44/02 ,  B29C44/44 ,  C08J9/20 ,  B29K75/00

摘要： 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.

公开(公告)号：US20200269542A1

公开(公告)日：2020-08-27

申请号：US16731302

申请日：2019-12-31

申请人： JSP CORPORATION

发明人： Ryuichi TANIGUCHI ,  Hirotoshi KAKUTA

IPC分类号： B32B5/18 ,  B32B27/32 ,  B32B27/08

摘要： 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.

公开(公告)号：US20200238870A1

公开(公告)日：2020-07-30

申请号：US16486269

申请日：2018-02-15

申请人： JSP CORPORATION

发明人： Atsuo TAKAYAMA ,  Keiichi HASHIMOTO ,  Katsunori HISAMATSU

IPC分类号： B60N2/70

摘要： 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.

公开(公告)号：US10717840B2

公开(公告)日：2020-07-21

申请号：US15559148

申请日：2016-03-22

申请人： JSP CORPORATION

发明人： Takeshi Aoki ,  Takashi Nishimoto

IPC分类号： C08K5/00 ,  C08J9/12 ,  B29C48/08 ,  B29C48/00 ,  B32B5/22 ,  C08J9/08 ,  C08J9/00 ,  B32B17/00 ,  C08J9/14 ,  B32B5/18 ,  B32B27/06 ,  B32B27/32 ,  B29K23/00 ,  B29K471/00 ,  B29K423/00 ,  B29C44/50 ,  B29L31/00

摘要： Provided is a method for producing a polyethylene-based resin extruded foam sheet by extruding and foaming a foamable molten resin composition formed by kneading a mixture containing a low-density polyethylene, a physical blowing agent, and an antistatic agent, wherein the foam sheet has a thickness in a range of from 0.05 to 0.5 mm, and the antistatic agent is a polymeric antistatic agent having a melting point whose different from the melting point of the low-density polyethylene is in a range of from −10 to +10° C., and having a melt flow rate of 10 g/10 min or more. This method enables a novel polyethylene-based resin extruded foam sheet to be obtained that is of high quality such that formation of a small hole or a through-hole has been reduced or eliminated, and has both excellent strength and a shock-absorbing property despite a very small thickness even in medium- or long-term continuous production, and besides, exhibits a sufficient antistatic property, thus suitable as a glass plate interleaf sheet.

公开(公告)号：US20190276627A1

公开(公告)日：2019-09-12

申请号：US16349236

申请日：2017-11-13

申请人： JSP Corporation

发明人： Shota TAKAGI ,  Masaharu OIKAWA

IPC分类号： C08J9/232 ,  C08J9/18

摘要： 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：US10336880B2

公开(公告)日：2019-07-02

申请号：US15542261

申请日：2015-01-09

申请人： JSP Corporation

发明人： Masaharu Oikawa ,  Nobumasa Koshita ,  Syouta Takagi

IPC分类号： C08J9/16 ,  C08J9/22 ,  C08J9/228 ,  C08J9/00 ,  C08J9/12 ,  C08J9/232 ,  C08L23/16

摘要： Provided is an expanded propylene resin bead including a core layer in a foamed state, which includes a propylene-based resin composition (a) satisfying the following (i) and (ii); and a cover layer which includes an olefin-based resin (b) satisfying the following (iii) or (iv): (i) the propylene-based resin composition (a) is a mixture of 65% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 145° C. to 165° C. and a flexural modulus of 1,200 MPa or more and 35% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 100° C. to 145° C. and a flexural modulus of 800 MPa to 1,200 MPa; (ii) a difference in a melting point between the resin (a1) and the resin (a2) is 5° C. to 25° C.; (iii) the olefin-based resin (b) is a crystalline olefin-based resin having a melting point (TmB) that is lower than a melting point (TmA) of the composition (a) and being in a relation of (0° C.

公开(公告)号：US20180162093A1

公开(公告)日：2018-06-14

申请号：US15318608

申请日：2015-07-15

申请人： JSP Corporation

发明人： Hidehiro SASAKI

IPC分类号： B32B5/18 ,  B32B7/12 ,  B32B27/06 ,  C08J9/00

CPC分类号： B32B5/18 ,  B32B5/16 ,  B32B7/12 ,  B32B9/002 ,  B32B9/046 ,  B32B9/048 ,  B32B15/046 ,  B32B15/16 ,  B32B15/18 ,  B32B15/20 ,  B32B17/00 ,  B32B21/047 ,  B32B21/12 ,  B32B27/06 ,  B32B27/065 ,  B32B27/14 ,  B32B27/36 ,  B32B2250/02 ,  B32B2260/025 ,  B32B2260/046 ,  B32B2262/0223 ,  B32B2262/0276 ,  B32B2262/10 ,  B32B2262/101 ,  B32B2262/103 ,  B32B2262/105 ,  B32B2262/106 ,  B32B2262/14 ,  B32B2264/0278 ,  B32B2264/10 ,  B32B2264/101 ,  B32B2264/102 ,  B32B2264/104 ,  B32B2264/12 ,  B32B2266/0264 ,  B32B2307/102 ,  B32B2307/304 ,  B32B2307/546 ,  B32B2307/72 ,  B32B2307/732 ,  B32B2419/00 ,  B32B2457/12 ,  B32B2479/00 ,  B32B2597/00 ,  B32B2605/003 ,  B32B2605/08 ,  B32B2605/10 ,  B32B2605/12 ,  C08J9/0061 ,  C08J9/0085 ,  C08J9/236 ,  C08J9/35 ,  C08J2300/12 ,  C08J2367/04 ,  C08J2463/00 ,  C08J2467/06

摘要： The present invention provides a composite molded article in which aliphatic polyester-based resin expanded beads and a thermosetting resin cured product containing a reinforcing fiber, which is formed between the expanded beads, are integrally fixed, wherein the aliphatic polyester-based resin is a polylactic acid-based resin, and a flexural modulus E (MPa) of the composite molded article and a density ρ (kg/m3) of the composite molded article satisfy Expression (1): E1/3/ρ≥0.02 [(MPa)1/3(kg/m3)−1], and a composite molded article and a laminate having more improved strength.