Method for producing noncrosslinked polyethylene resin expanded particle (first stage expanded particle) and re-expanded noncrosslinked polyethylene resin expanded particle
    2.
    发明授权
    Method for producing noncrosslinked polyethylene resin expanded particle (first stage expanded particle) and re-expanded noncrosslinked polyethylene resin expanded particle 有权
    非交联聚乙烯树脂发泡粒子(第一阶段发泡粒子)和再膨胀非交联聚乙烯树脂发泡粒子的制造方法

    公开(公告)号:US09193842B2

    公开(公告)日:2015-11-24

    申请号:US14168930

    申请日:2014-01-30

    Abstract: A noncrosslinked polyethylene resin expanded particle is provided having a bulk density BD in a range of 10 g/L to 100 g/L, the particle being obtained by expanding a polyethylene resin particle whose density is in a range of 0.920 g/cm3 to 0.940 g/cm3, the noncrosslinked polyethylene resin expanded particle having a shrinkage factor in a range of 2% to 30%, the shrinkage factor being obtained by the following formula (1): Shrinkage Factor=(BD−VBD)×100/VBD  (1), wherein: the BD of the noncrosslinked polyethylene expanded particle is a bulk density at 23° C. and at 0.1 MPa (at a normal atmospheric pressure); and the VBD of the noncrosslinked polyethylene expanded particle is a bulk density at 23° C. and at a reduced pressure of 0.002 MPa or less.

    Abstract translation: 提供了一种非交联聚乙烯树脂发泡粒子,其堆积密度BD在10g / L至100g / L的范围内,该颗粒是通过使密度为0.920g / cm 3至0.940的聚乙烯树脂颗粒膨胀而获得的 g / cm3,收缩率在2%〜30%的收缩率的非交联聚乙烯树脂发泡体,收缩率由下式(1)求出:收缩系数=(BD-VBD)×100 / VBD( 1),其中:非交联聚乙烯发泡粒子的BD为23℃,0.1MPa(正常大气压)时的体积密度; 非交联聚乙烯发泡粒子的VBD为23℃,0.002MPa以下的减压下的体积密度。

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