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    • 2. 发明申请
    • MULTI-LAYER ORIENTED POLYPROPYLENE FILMS WITH MODIFIED CORE
    • 多层聚对苯二甲酸乙二醇酯膜与改性核心
    • WO2004094141A2
    • 2004-11-04
    • PCT/US2004/010336
    • 2004-04-02
    • EXXONMOBIL OIL CORPORATIONMIGLIORINI, Robert, A.LIESTMAN, David, A.
    • MIGLIORINI, Robert, A.LIESTMAN, David, A.
    • B32B27/00
    • B32B27/18B32B27/08B32B27/32B32B2307/31B32B2307/736B32B2451/00B32B2553/00C08L23/0815C08L23/10C08L23/16C08L23/20C08L2205/02Y10T428/24802C08L2666/04
    • A multilayer, oriented, polymeric film and the method for its manufacture are provided by the present invention. The film comprises a first and second skin layers, and a core layer comprising isotactic polypropylene, a polymeric modifier, and a hydrocarbon resin. A method for making the film of the present invention includes the steps of coextruding skin layers comprising heat sealable polymers and a core layer comprising isotactic polypropylene, a polymeric modifier, and a hydrocarbon resin; stretching the film in the machine direction, e.g., from about 4 to 7 times at low MDO temperatures; and stretching the film in the transverse direction, e.g., from about 6 to 11 times. Multi-layer clear biaxially shrinkable films with outstanding shrink properties and processability are provided. Additionally, white opaque-cavitated, coated, metallized, colored/tinted, reflective, and phosphorescent biaxially shrinkable films are provided. Furthermore, multilayer non-shrinkable films with very low melting point sealant resins are provided, and are advantaged by the novel combination of film composition of matter and method of manufacture.
    • 本发明提供多层定向聚合物膜及其制造方法。 膜包括第一和第二表皮层,以及包含全同立构聚丙烯,聚合物改性剂和烃树脂的芯层。 制造本发明的膜的方法包括以下步骤:共挤出包含可热封聚合物的表皮层和包含全同立构聚丙烯,聚合物改性剂和烃树脂的芯层; 在机器方向拉伸膜,例如在低MDO温度下约4至7倍; 并且在横向上拉伸膜,例如约6至11倍。 提供具有突出的收缩性能和加工性能的多层透明双轴收缩膜。 另外,提供白色不透明空穴,涂覆,金属化,着色/着色,反射和磷光双轴收缩膜。 此外,提供具有非常低熔点密封树脂的多层不可收缩膜,并且通过物质的膜组成和制造方法的新颖组合有利。