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    • 7. 发明申请
    • MULTILAYER THERMOSHRINKABLE FILMS
    • 多层热敏胶片
    • WO2007088092A1
    • 2007-08-09
    • PCT/EP2007/050178
    • 2007-01-09
    • BASELL POLYOLEFINE GMBHKOKEL, NicolasCHRISTOF, Justus
    • KOKEL, NicolasCHRISTOF, Justus
    • B32B27/32
    • B32B27/32B32B27/08B32B2250/242B32B2307/72B32B2307/736B32B2553/00Y10T428/2495Y10T428/31913
    • A multilayer thermoshrinkable film and a process for manufacturing the same are described. The film is particularly suitable for packaging applications, in particular as a packaging thermoshrinkable hood for enclosing an item or a secondary packaging essentially consisting of polyethylene. The multilayer thermoshrinkable film of the invention comprises: a) at least one first film layer comprising a linear ethylene copolymer having a density of 0.920 to 0.950 g/cm 3 ; b) at least one second film layer comprising a first copolymer of propylene with ethylene and/or at least one CH 2 =CHR 1 α-olefins, where R 1 is a hydrocarbon radical having 2-10 carbon atoms; and c) at least one third film layer comprising a linear ethylene copolymer having a density of 0.920 to 0.950 g/cm 3 ; wherein said at least one first film layer is arranged between said at least one second film layer and at least one third film layer. The multilayer thermoshrinkable film, which has improved shrinkage and seal properties, may be advantageously produced by means of standard symmetrical film extrusion plants.
    • 对多层耐热性薄膜及其制造方法进行说明。 该膜特别适用于包装应用,特别是作为用于封装物品的包装可热封罩或基本上由聚乙烯组成的二次包装。 本发明的多层可热封膜包括:a)至少一个包含密度为0.920-0.950g / cm 3的线性乙烯共聚物的第一膜层; b)至少一个第二薄膜层,其包含丙烯与乙烯和/或至少一种CH 2α-烯烃的第一共聚物,其中R 1, 1是具有2-10个碳原子的烃基; 和c)至少一个包含密度为0.920至0.950g / cm 3的线性乙烯共聚物的第三膜层; 其中所述至少一个第一膜层布置在所述至少一个第二膜层和至少一个第三膜层之间。 具有改善的收缩和密封性能的多层可热凝膜可以有利地通过标准对称膜挤出设备来生产。