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    PROPYLENE RESIN FOAM PARTICLES AND FOAM PARTICLE MOLDED ARTICLE
    1.
    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

    Polypropylene-based resin foam particle and compact thereof
    3.
    发明专利
    Polypropylene-based resin foam particle and compact thereof 有权
    基于聚丙烯的树脂泡沫颗粒及其紧密度

    公开(公告)号：JP2014173012A

    公开(公告)日：2014-09-22

    申请号：JP2013047126

    申请日：2013-03-08

    Applicant: Jsp Corp ,  株式会社ジェイエスピー ,  Japan Polypropylene Corp ,  日本ポリプロ株式会社

    Inventor： KOSHITA NOBUMASA ,  SHINOHARA MITSURU ,  OIKAWA MASAHARU

    IPC: C08J9/18 ,  C08L23/08 ,  C08L23/14 ,  C08L53/00

    Abstract: PROBLEM TO BE SOLVED: To provide a polypropylene-based resin foam particle which is suppressed in embrittlement of foam at low temperatures and has good low-temperature impact resistance, and a compact thereof.SOLUTION: A polypropylene-based resin foam particle is produced from a polypropylene-based resin composition which has a melting point of 125-150°C, shows a single peak in the range of -20 to 20°C in a temperature-loss tangent(tanδ) curve obtained by solid dynamic viscoelasticity measurement, a temperature of the peak of 8°C or lower and a maximum value of tanδ of 0.12 or greater. A polypropylene-based resin foam particle has such a crystalline structure that there appear an endothermic peak (intrinsic peak) intrinsic to the polypropylene-based resin composition and another endothermic peak (high-temperature peak) on the high-temperature side relative to the intrinsic peak in the DSC curve (DSC curve for first heating) obtained when heating 1-3 mg of the foam particles from 25°C to 200°C at a programming rate of 10°C/min by the heat flux differential scanning calorimetry.

    Abstract translation: 要解决的问题：提供在低温下抑制泡沫脆化并具有良好的低温耐冲击性的聚丙烯类树脂发泡体颗粒及其成型体。解决方案：聚丙烯基树脂泡沫颗粒由 熔点为125-150℃的聚丙烯类树脂组合物在通过固体动态粘弹性测定得到的温度损失角正切（tanδ）曲线中表现出-20〜20℃的单峰， 8℃以下的峰的温度和tanδ的最大值为0.12以上。 聚丙烯类树脂发泡体颗粒具有这样的晶体结构，即在聚丙烯类树脂组合物中存在吸热峰（固有峰），在高温侧出现另一吸热峰（高温峰） 通过热通量差示扫描量热法以10℃/ min的编程速度加热1-3mg泡沫颗粒从25℃至200℃获得的DSC曲线（第一次加热的DSC曲线）中的峰。

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