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    • 2. 发明申请
    • POLYETHYLENE BLEND COMPOSITION SUITABLE FOR BLOWN FILM, METHOD OF PRODUCING THE SAME, AND FILMS MADE THEREFROM
    • 适用于薄膜的聚乙烯混合组合物,其制备方法和其制备的薄膜
    • WO2013009514A1
    • 2013-01-17
    • PCT/US2012/045237
    • 2012-07-02
    • DOW GLOBAL TECHNOLOGIES LLCEFFLER, Lawrence J.SAVARGAONKAR, Nilesh R.KARJALA, Teresa P.SERRAT, CristinaWANG, Jian
    • EFFLER, Lawrence J.SAVARGAONKAR, Nilesh R.KARJALA, Teresa P.SERRAT, CristinaWANG, Jian
    • C08L23/08C08J5/18
    • C08L23/06C08J5/18C08J2323/08C08L23/0815C08L2205/02C08L2205/025Y10T428/1352
    • The instant invention provides a polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom. The polyethylene blend composition suitable for blown film, according to the present invention, comprises the melt blending product of: (a) from 5 percent or less by weight of a first low density polyethylene (first LDPE) having a density in the range of from 0.915 to 0.935 g/cm 3 , and a melt index (I 2 ) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (Mw/Mn) in the range of from 6 to 10; (b) from 5 to 50 percent by weight of a second low density polyethylene (second LDPE) having a density in the range of from 0.915 to 0.935 g/cm 3 , and a melt index (I2) in the range of from 0.1 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (Mw/Mn) in the range of from 6 to 10; with the proviso that the second LDPE has a melt index (I2) that is different from the melt index (I2) of first LDPE; (c) from 44 percent or greater by weight of a heterogeneous linear low density polyethylene (hLLDPE) having a density in the range of from 0.917 to 0.950 g/cm 3 , and a melt index (I2) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (d) optionally a hydrotalcite based neutralizing agent (e) optionally one or more nucleating agents; and (f) optionally one or more antioxidants. When said polyethylene blend-composition is formed into a film via a blown film process, the output rate is improved at least 6 percent, for example 7 percent, relative to a polyethylene blend composition consisting essentially of (a) a similar heterogeneous linear low density polyethylene component; and (b) a similar second low density polyethylene component.
    • 本发明提供了适用于吹塑薄膜的聚乙烯共混组合物,其制备方法和由其制成的薄膜。 根据本发明的适用于吹塑薄膜的聚乙烯共混组合物包括熔融共混产物:(a)5重量%或更少的第一低密度聚乙烯(第一LDPE),其密度范围为 0.915-0.935g / cm3,熔体指数(I2)在大于0.8至小于或等于5g / 10分钟的范围内,分子量分布(Mw / Mn)在6 到10 (b)5至50重量%的密度在0.915-0.935g / cm3范围内的第二低密度聚乙烯(第二LDPE),熔体指数(I 2)在0.1以下的范围内 或者等于5g / 10分钟,分子量分布(Mw / Mn)在6至10的范围内; 条件是第二LDPE具有与第一LDPE的熔体指数(I 2)不同的熔体指数(I 2); (c)44重量%以上的密度为0.917〜0.950g / cm 3的异相线性低密度聚乙烯(hLLDPE),熔体指数(I 2)为0.1以下 大于或等于5g / 10分钟; (d)任选的水滑石类中和剂(e)任选的一种或多种成核剂; 和(f)任选的一种或多种抗氧化剂。 当所述聚乙烯共混物组合物通过吹塑薄膜法形成薄膜时,相对于基本上由(a)类似的异质线性低密度聚乙烯混合物组合物组成的聚乙烯混合物组合物,输出速率提高至少6%,例如7% 聚乙烯组分; 和(b)类似的第二低密度聚乙烯组分。