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Narrow molecular weight distribution ethylene-acrylate cling layer in stretch/cling films
Narrow molecular weight distribution ethylene-acrylate cling layer in stretch/cling films
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机译:拉伸/保鲜膜中窄分子量分布的乙烯-丙烯酸酯保鲜层
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摘要
A thermoplastic film is provided which is especially suited for use in stretch/cling applications such as, for example, the bundling, packaging and unitizing of foods and other goods. The film comprises a cling layer comprising a polymer of at least ethylene and 2-40 wt % acrylate having a ratio of M.sub.w /M.sub.n less than about 3.5, a ratio of M.sub.z /M.sub. w less than about 3, a melt index of about 0.1-30 dg/min, and a melt index swell ratio less than about 1.6, preferably without a tackifying additive. The film may further comprise a non-cling layer comprising a thermoplastic preferably essentially free of anticling (slip and/or antiblock) additive. Preferred thermoplastic materials include polyethylene and polypropylene.
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机译:提供了一种热塑性薄膜,其特别适合用于拉伸/保鲜应用,例如食品和其他商品的捆扎,包装和统一。该膜包括粘附层,该粘附层包含至少乙烯和2-40重量%丙烯酸酯的聚合物,其M w / M n比小于约3.5,M z / M比。子w小于约3,熔体指数为约0.1-30dg / min,并且熔体指数溶胀比小于约1.6,优选没有增粘添加剂。该膜可进一步包括非粘合层,该非粘合层包含热塑性塑料,该热塑性塑料优选基本不含防粘剂(防滑和/或防粘连)。优选的热塑性材料包括聚乙烯和聚丙烯。
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