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Ethylene/Alpha-Olefin Copolymers for Better Optical and Mechanical Properties and Processability of Film Made Therefrom
Ethylene/Alpha-Olefin Copolymers for Better Optical and Mechanical Properties and Processability of Film Made Therefrom
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机译:乙烯/α-烯烃共聚物,具有更好的光学和机械性能,以及由其制成的薄膜可加工性
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摘要
A Ziegler-Natta catalyzed ethylene/alpha-olefins copolymer is provided having sporadic long chain branches and reversed comonomer composition distribution or short chain branching distribution (SCBD) in the high molecular weight fractions. According to the invention, polyethylene film made with the inventive copolymer has a balance of improved physical, optical, mechanical properties as well as processability. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a film haze of less than 10, a film clarity of greater than 90, a dart impart resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.
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