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    Multilayer polypropylene-based packaging film and its use
    3.
    发明授权
    Multilayer polypropylene-based packaging film and its use 失效
    多层聚丙烯基包装膜及其用途

    公开(公告)号：US5837369A

    公开(公告)日：1998-11-17

    申请号：US724229

    申请日：1996-09-27

    申请人： Manfred Grunberger ,  Paul De Mink ,  Anton Wolfsberger

    发明人： Manfred Grunberger ,  Paul De Mink ,  Anton Wolfsberger

    IPC分类号： B65D65/40 ,  B32B7/06 ,  B32B9/00 ,  B32B27/08 ,  B32B27/32 ,  C08L23/00 ,  C08L23/04 ,  C08L23/10 ,  C08L23/12 ,  C08L23/14 ,  C08L23/16 ,  C08L53/00 ,  C09D153/00 ,  C09J123/10 ,  B32B7/12

    CPC分类号： C08L23/142 ,  B32B27/08 ,  C08L23/04 ,  C08L23/10 ,  C08L53/00 ,  C09D153/00 ,  C09J123/10 ,  C08L2205/02 ,  C08L2207/14 ,  C08L23/12 ,  C08L23/16 ,  Y10T428/2826 ,  Y10T428/31899 ,  Y10T428/31902 ,  Y10T428/31913

    摘要： A packaging film which comprises a) a sealing ply comprising a mixture of a.sub.1) 40 to 80% by weight of a C.sub.2 -C.sub.3 random copolymer having a C.sub.2 content of 1-15% by weight or a.sub.2) 40 to 80% by weight of a polymer blend consisting of a.sub.2.1) 60 to 98% by weight of a crystalline copolymer of propylene with ethylene and/or an .alpha.-olefin of the general formula CH.sub.2 =CHR, where R is a linear or branched alkyl radical having 2-8 carbon atoms, containing 85-99.5% by weight of propylene, and a.sub.2.2) 2 to 40% by weight of a resilient copolymer of ethylene with propylene and/or an .alpha.-olefin of the general formula CH.sub.2 =CHR, containing 20-70% by weight of ethylene, or a.sub.3) 40 to 80% by weight of a highly amorphous polypropylene having a crystalline polypropylene fraction of up to 10% by weight with an enthalpy of fusion of not more than 40 J/g and a melt flow index between 0.1 and 100 g/10 min, where the polypropylene may be a homopolymer of propylene or a copolymer of propylene with one or more .alpha.-olefins and with a propylene fraction of at least 80 mol %, and a.sub.4) 20 to 60% by weight of an ethylene polymer and b) a monolayer or multilayer base ply comprising thermoplastic polymers, the packaging film being peelable after sealing against a polypropylene ply with a force of not more than 30N/15 mm, and its use.

    摘要翻译： 一种包装膜，其包括a）密封层，其包含a1）40至80重量％的C2含量为1-15重量％的C2-C3无规共聚物的混合物，或a2）40至80重量％ 由以下组成的聚合物共混物：（a）（b）60至98重量％的丙烯与乙烯和/或通式CH 2 = CHR的α-烯烃的结晶共聚物，其中R是具有2- 8个碳原子，含有85-99.5重量％的丙烯，和a2.2）2-40重量％的乙烯与丙烯和/或通式CH 2 = CHR的α-烯烃的弹性共聚物，其含有20 -70重量％的乙烯，或a3）40-80重量％的结晶聚丙烯组分高达10重量％，熔体焓不超过40J / g的高度无定形的聚丙烯和熔体 流量指数在0.1至100g / 10min之间，其中聚丙烯可以是丙烯的均聚物或丙烯与一种或多种α-烯烃的共聚物 翅片，丙烯馏分为至少80摩尔％，和a4）20至60重量％的乙烯聚合物，以及b）包含热塑性聚合物的单层或多层底层，所述包装膜在密封聚丙烯层之后是可剥离的 用力不超过30N / 15毫米，并使用。