公开(公告)号：US5486415A

公开(公告)日：1996-01-23

申请号：US271981

申请日：1994-07-08

申请人： Junichi Kimura ,  Kazuki Wakamatsu ,  Masahito Usui ,  Makoto Satoh

发明人： Junichi Kimura ,  Kazuki Wakamatsu ,  Masahito Usui ,  Makoto Satoh

IPC分类号： B32B27/32 ,  C08L23/10 ,  B32B7/12

CPC分类号： B32B27/32 ,  C08L23/142 ,  Y10T428/2826 ,  Y10T428/31909

摘要： A polypropylene laminate film comprising a crystalline polypropylene layer having laminated on at least one surface thereof a copolymer which is a random copolymer of propylene, ethylene, and an .alpha.-olefin having at least 4 carbon atoms, the copolymer being obtained by a vapor-phase polymerization using a catalyst system comprising a solid catalyst component containing magnesium, titanium, and a halogen, an organoaluminum compound, and an electron donative compound in substantially the absence of a liquid medium, and satisfying the following requirements (1) to (7):(1) the ethylene content of the copolymer is from 3.0 to 7.0% by weight,(2) the content of the .alpha.-olefin having at least 4 carbon atoms of the copolymer is from 2.0 to 6.0% by weight,(3) the ratio of the ethylene content to the content of the .alpha.-olefin having at least 4 carbon atoms in the copolymer is at least 1.0,(4) the melt flow rate of the copolymer is 10 g/10 minutes or less,(5) the ratio of the weight average molecular weight to the number average molecular weight of the copolymer is 4.5 or less,(6) the melting point of the copolymer is 135.degree.C. or less, and(7) the amount of the n-hexane-soluble components in the copolymer is less than 5.5% by weight.

摘要翻译： 一种聚丙烯层压膜，其包含在其至少一个表面上层压有共聚物的结晶聚丙烯层，该共聚物是丙烯，乙烯和具有至少4个碳原子的α-烯烃的无规共聚物，所述共聚物通过气相 在基本上不存在液体介质的情况下使用包含含有镁，钛和卤素的固体催化剂组分，有机铝化合物和给电子化合物的催化剂体系进行聚合，并满足以下要求（1）至（7）： （1）共聚物的乙烯含量为3.0〜7.0重量％，（2）共聚物中具有至少4个碳原子的α-烯烃的含量为2.0〜6.0重量％，（3） 共聚物中乙烯含量与具有至少4个碳原子的α-烯烃的含量的比率至少为1.0，（4）共聚物的熔体流动速率为10g / 10分钟以下，（5） 重量比 共聚物的数均分子量的平均分子量为4.5以下，（6）共聚物的熔点为135℃以下，（7）正己烷可溶成分的量 共聚物小于5.5重量％。