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    21.
    发明专利
    未知

    公开(公告)号：DE69408548T2

    公开(公告)日：1998-08-27

    申请号：DE69408548

    申请日：1994-03-11

    Applicant: JSP CORP

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

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

    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/cm and up to and including 0.940 g/cm 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 DEG C at 10 DEG C/min and then is cooled to room temperature at 10 DEG C/min, heating is again carried out to 200 DEG C at 10 DEG 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 DEG C to (the melting point - 10) DEG C in terms of J/g and qtotal stands for the total quantity of absorbed heat of the DSC curve of from 50 DEG 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 DEG C or higher is 5 DEG 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.

    PROCESS FOR THE PRODUCTION OF FOAMED POLYMER PARTICLES
    22.
    发明专利
    PROCESS FOR THE PRODUCTION OF FOAMED POLYMER PARTICLES 未知

    公开(公告)号：CA2055358A1

    公开(公告)日：1992-05-23

    申请号：CA2055358

    申请日：1991-11-13

    Applicant: JSP CORP

    Inventor： KUWABARA HIDEKI ,  TSURUGAI KAZUO ,  OIKAWA MASAHARU

    IPC: C08J9/12 ,  C08J9/00 ,  C08J9/16 ,  C08J9/18 ,  C08K9/12

    Abstract: Disclosed herein is a production process of foamed polymer particles, wherein particles of a polymer, which contain a silica-alumina adsorbent in which the molar ratio of SiO2/A1203 is at least 1.15, are dispersed in a dispersion medium in the presence of carbon dioxide in a closed vessel, the resultant dispersion is heated to a temperature not lower than the softening temperature of the polymer to impregnate the polymer particles with carbon dioxide, and the polymer particles and the dispersion medium are then released into an atmosphere of a pressure lower than the internal pressure of the vessel, thereby expanding the polymer particles. The polymer may be an uncrosslinked propylene polymer, uncrosslinked, linear low-density polyethylene or crosslinked polymer.

    METHOD FOR PRODUCING EXPANDED POLYLACTIC ACID RESIN PARTICLE
    26.
    发明公开
    METHOD FOR PRODUCING EXPANDED POLYLACTIC ACID RESIN PARTICLE 审中-公开
    生产发泡聚丙烯酸树脂颗粒的方法

    公开(公告)号：EP2772509A4

    公开(公告)日：2015-07-08

    申请号：EP12841440

    申请日：2012-09-21

    Applicant: JSP CORP

    Inventor： SHINOHARA MITSURU ,  OIKAWA MASAHARU

    IPC: C08J9/18 ,  C08L101/16

    CPC classification number: C08J9/18 ,  C08J9/12 ,  C08J9/232 ,  C08J2300/16 ,  C08J2367/04

    Abstract: A process for producing polylactic acid-based resin expanded beads by releasing foamable resin particles, which are in a softened state and dispersed in a dispersing medium contained in a pressure resisting closed vessel, to an atmosphere having a pressure lower than that in the closed vessel together with the dispersing medium to foam and expand the foamable particles. The foamable resin particles are obtained by impregnating a physical blowing agent into resin particles which are formed of a modified polylactic acid resin modified with an epoxide and showing specific physical properties when melted.

    FOAMED PARTICLES OF PROPYLENE HOMOPOLYMER AND MOLDINGS OF SAID PARTICLES
    27.
    发明公开
    FOAMED PARTICLES OF PROPYLENE HOMOPOLYMER AND MOLDINGS OF SAID PARTICLES 失效
    丙烯聚合物和GAY DAURAUS模塑部件的发泡粒子

    公开(公告)号：EP0775722A4

    公开(公告)日：1998-08-12

    申请号：EP96908358

    申请日：1996-04-05

    Applicant: JSP CORP

    Inventor： TSURUGAI KAZUO ,  TOKORO HISAO ,  OIKAWA MASAHARU

    IPC: C08J9/18 ,  C08F110/06 ,  C08J9/16 ,  C08L23/10 ,  C08L23/12 ,  B29C44/00

    CPC classification number: C08J9/16 ,  C08F110/06 ,  C08J2323/12 ,  C08L23/10 ,  C08L23/12 ,  C08F2500/12

    Abstract: Conventional moldings of foamed particles of propylene polymers have been estimated to be excellent in cushioning effect and impact resilience but not necessarily satisfactory in stiffnesses such as compressional stress. The formed particles of propylene homopolymers of the invention have a modulus in tension of 15,000-25,000 kg/cm2 and a crystal structure which exhibits both of proper and high-temperature peaks as the endothermic peak in the DSC curve obtained by differential scanning calorimetry, the high-temperature peak having a heat quantity of 30-60 J/g. Moldings produced from the above foamed particles have a density of 0.01-0.3 g/cm3 and a modulus in tension of 15,000-25,000 kg/cm2. The DSC curves thereof reveal that, as in the case of the foamed particles per se, the crystal structures exhibit both of the proper and high-temperature peaks and the high-temperature peak has a heat quantity of 30-60 J/g, as well.

    EXPANDED POLYPROPYLENE RESIN BEADS AND EXPANDED BEAD MOLDING
    30.
    发明公开
    EXPANDED POLYPROPYLENE RESIN BEADS AND EXPANDED BEAD MOLDING 有权
    拉伸聚丙烯树脂颗粒及形成拉伸珠

    公开(公告)号：EP2447311A4

    公开(公告)日：2013-05-29

    申请号：EP10791792

    申请日：2010-06-03

    Applicant: JSP CORP

    Inventor： SAKAGUCHI MASAKAZU ,  NISHIJIMA KOUKI ,  OIKAWA MASAHARU

    IPC: C08J9/00 ,  B29C44/34 ,  C08J9/12 ,  C08J9/18 ,  C08J9/224 ,  C08J9/232

    CPC classification number: C08J9/0061 ,  B29C44/3461 ,  C08J9/122 ,  C08J9/18 ,  C08J9/232 ,  C08J2201/03 ,  C08J2203/06 ,  C08J2323/12 ,  C08J2423/12

    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 0.1µm and not greater than 3.0µm.

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