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    PROPYLENE RESIN FOAM PARTICLES AND FOAM PARTICLE MOLDED ARTICLE
    14.
    发明专利
    PROPYLENE RESIN FOAM PARTICLES AND FOAM PARTICLE MOLDED ARTICLE 未知

    公开(公告)号：SG11201705545WA

    公开(公告)日：2017-08-30

    申请号：SG11201705545W

    申请日：2015-01-09

    Applicant: JSP CORP

    Inventor： OIKAWA MASAHARU ,  KOSHITA NOBUMASA ,  TAKAGI SYOUTA

    IPC: C08J9/18 ,  C08J9/228

    Abstract: 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

    Polyolefin resin foam particles, foam-particle moulded body, and composite stacked body including said moulded body
    15.
    发明专利
    Polyolefin resin foam particles, foam-particle moulded body, and composite stacked body including said moulded body 未知

    公开(公告)号：AU2015235182B2

    公开(公告)日：2016-12-08

    申请号：AU2015235182

    申请日：2015-03-20

    Applicant: JSP CORP

    Inventor： SHINOHARA MITSURU ,  OIKAWA MASAHARU

    IPC: C08J9/18 ,  B32B5/18 ,  B32B27/32

    Abstract: The present invention provides polyolefin resin foam particles, i.e. multilayer foam particles each comprising: a core layer which is in a foamed state, and which is configured from a polyolefin resin; and a coating layer with which the core layer is coated. The coating layer is configured from a mixed resin including a polyolefin resin (A) and at least one resin (B) selected from polystyrene resins and polyester resins. The weight ratio (A:B) of the polyolefin resin (A) to the at least one resin (B) in the mixed resin is in the range of 15:85 to 90:10. The present invention also provides a composite stacked body in which a foam-particle moulded body of said polyolefin resin foam particles is used. The foam-particle moulded body exhibits excellent solvent resistance, and has a surface exhibiting excellent adhesive properties with respect to thermosetting resins. Furthermore, the foam-particle moulded body is capable of providing a composite stacked body which includes a thermosetting resin, and with which excellent productivity is exhibited.

    EXPANDED POLYPROPYLENE RESIN BEADS AND EXPANDED BEAD MOLDING
    16.
    发明专利
    EXPANDED POLYPROPYLENE RESIN BEADS AND EXPANDED BEAD MOLDING 未知

    公开(公告)号：SG176841A1

    公开(公告)日：2012-01-30

    申请号：SG2011092509

    申请日：2010-06-03

    Applicant: JSP CORP

    Inventor： SAKAGUCHI MASAKAZU ,  NISHIJIMA KOUKI ,  OIKAWA MASAHARU

    Abstract: Disclosed are expanded polypropylene resin beads which enable the heat molding of expanded polypropylene resin beads at low steam pressure and can provide an expanded mold with sufficient rigidity and heat resistance. The multilayer expanded resin beads are formed by expanding multilayer resin beads comprising a core layer formed from a polypropylene resin and a coating layer formed from a different polypropylene resin to that which forms the core layer. The multilayer expanded resin beads can be molded in-mold at a steam pressure lower than the steam pressure for molding single-layer expanded beads which would result from expanding the single layer resin beads made from the polypropylene resin which forms the core layer. The coating layer to core layer resin weight ratio in the aforementioned multi- layer resin beads is not less than 0.001 and not greater than 0.040 and the expansion ratio of the expanded beads, the average value of the thickness of the coating layer of the expanded beads, calculated based on the coating weight ratio of the multi-layer resin beads, is not less than 0.1[err]m and not greater than 3.0[err]m.

    UNCROSSLINKED POLYETHYLENE PARTICLES FOR THE PRODUCTION OF EXPANDED PARTICLES AND UNCROSSLINKED POLYETHYLENE EXPANDED PARTICLES
    17.
    发明专利
    UNCROSSLINKED POLYETHYLENE PARTICLES FOR THE PRODUCTION OF EXPANDED PARTICLES AND UNCROSSLINKED POLYETHYLENE EXPANDED PARTICLES 未知

    公开(公告)号：CA2118851A1

    公开(公告)日：1994-09-18

    申请号：CA2118851

    申请日：1994-03-11

    Applicant: JSP CORP

    Inventor： TOKORO HISAO ,  SASAKI HIDEHIRO ,  TSURUGAI KAZUO ,  OIKAWA MASAHARU

    IPC: C08J9/18 ,  C08J9/22 ,  C08L23/06 ,  C08L23/08 ,  C08F110/02

    Abstract: The present invention relates to uncrosslinked polyethylene particles for the production of expanded particles that can easily and securely produce expanded particles which can be molded without applying a special internal pressure, are excellent in moldability, such as secondary expansion, fusion and dimensional accuracy, and have a high expansion rate and to uncrosslinked polyethylene expanded particles made of said uncrosslinked polyethylene particles. The present uncrosslinked polyethylene particles for the production of expanded particles are resin particles whose base resin is an uncrosslinked polyethylene having a density of over 0.920 g/cm3 and up to and including 0.940 g/cm3 and wherein, in the DSC curve that is obtained by using a differential scanning calorimeter in such a manner that after 1 to 10 mg of the resin particles is heated to 200 .degree.C at 10 .degree.C/min and then is cooled to room temperature at 10 .degree.C/min, heating is again carried out to 200 .degree.C at 10 .degree.C/min and during the second heating the measurement for the DSC curve is carried out, q1/qtotal ? 0.5 wherein q1 stands for the quantity of heat absorbed in the range of the DSC curve of from 50 .degree.C to (the melting point 10) .degree.C in terms of J/g and qtotal stands for the total quantity of absorbed heat of the DSC curve of from 50 .degree.C to the temperature at which the melting is completed in terms of J/g is satisfied, and the temperature width at 1/2 of the peak height h of the endothermic peak whose apex is at 115 .degree.C or higher is 5 .degree.C or more. Further, the present uncrosslinked polyethylene expanded particles are obtained by impregnating the above resin particles with an expanding agent, dispersing the resin particles in a dispersing agent in a closed vessel, and discharging the resin particles and the dispersing medium from the vessel at a temperature equal to or over the softening temperature of the resin particles into a low-pressure region.

    19.
    发明专利
    未知

    公开(公告)号：DE69727377T2

    公开(公告)日：2004-09-16

    申请号：DE69727377

    申请日：1997-06-11

    Applicant: JSP CORP

    Inventor： OIKAWA MASAHARU ,  TSURUGAI KAZUO ,  TOKORO HISAO

    IPC: C08J9/00 ,  C08J9/18 ,  C08J9/16

    Abstract: When it is intended to obtain foamed particles having a high expansion ratio upon the production of foamed particles of a polyolefin resin, there has been a problem that foamed particles uneven in cell diameter are produced. Any molded article produced with such foamed particles has involved a drawback that it is poor in dimensional stability, and its surface profile becomes uneven. The invention relates to foamed particles comprising a polyolefin resin as a base resin, wherein the base resin contains a metal salt (excluding alkali metal salts) of boric acid in such a manner that the content of the metal salt of boric acid in the raw resin amounts to 50-50,000 ppm. Zinc borate, magnesium borate or the like is used as the metal salt of boric acid. The foamed particles are obtained by using a polyolefin resin containing the metal salt of boric acid to prepare resin particles, dispersing the resin particles in a dispersion medium in a closed vessel and at the same time impregnating the resin particles with a foaming agent, holding the resin particles in a heated and pressurized atmosphere, and then releasing the resin particles together with the dispersion medium into an atmosphere of a pressure lower than the internal pressure of the vessel to expand the resin particles.

    20.
    发明专利
    未知

    公开(公告)号：BR9706836A

    公开(公告)日：1999-12-28

    申请号：BR9706836

    申请日：1997-06-11

    Applicant: JSP CORP

    Inventor： OIKAWA MASAHARU

    IPC: C08J9/00 ,  C08J9/18 ,  C08J9/16

    Abstract: When it is intended to obtain foamed particles having a high expansion ratio upon the production of foamed particles of a polyolefin resin, there has been a problem that foamed particles uneven in cell diameter are produced. Any molded article produced with such foamed particles has involved a drawback that it is poor in dimensional stability, and its surface profile becomes uneven. The invention relates to foamed particles comprising a polyolefin resin as a base resin, wherein the base resin contains a metal salt (excluding alkali metal salts) of boric acid in such a manner that the content of the metal salt of boric acid in the raw resin amounts to 50-50,000 ppm. Zinc borate, magnesium borate or the like is used as the metal salt of boric acid. The foamed particles are obtained by using a polyolefin resin containing the metal salt of boric acid to prepare resin particles, dispersing the resin particles in a dispersion medium in a closed vessel and at the same time impregnating the resin particles with a foaming agent, holding the resin particles in a heated and pressurized atmosphere, and then releasing the resin particles together with the dispersion medium into an atmosphere of a pressure lower than the internal pressure of the vessel to expand the resin particles.

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