SHRINK FILM HAVING BALANCED PROPERTIES OR IMPROVED
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专利名称：SHRINK FILM HAVING BALANCED
PROPERTIES OR IMPROVED TOUGHNESS
AND METHODS OF MAKING THE SAME 发明人：PATEL, Rajen, M.,DEGROOT, Jacquelyn, A.申请号：EP97949401.0
申请日：19971113
公开号：EP0938521B1
公开日：
20020605
专利内容由知识产权出版社提供
摘要：This invention relates to an improved shrink film obtained by selectively controlling and optimizing the density differential between at least two polyolefin polymer components to provide narrow density splits. One aspect of this invention relates to a biaxially oriented polyolefin shrink film having balanced properties and another aspect of this invention relates to an oriented shrink film having improved toughness. This invention also relates to a biaxial orientation method of making an improved shrink film using elaborate shrink orientation techniques such as tenter framing, double-bubble, trapped bubble, tape orientation or combinations thereof. Most preferably, the first polyolefin polymer component is a lower density, substantially linear ethylene/α-olefin interpolymer and the second polyolefin polymer component is a higher density, heterogeneously branched ethylene/α-olefin interpolymer.
申请人：DOW CHEMICAL CO
地址：US
国籍：US
代理机构：Weiss, Wolfgang, Dipl.-Chem. Dr.更多信息请下载全文后查看。