Grease Resistant Multilayer Polyethylene Films, 2016 PLACE Conference

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Barrier properties are important performance requirements for many packaging applications. Sophisticated and automated techniques exist for testing oxygen and moisture transmission rates, however, only a few elementary methods exist for determining a package’s resistance to grease permeation. In addition, most grease permeation methods only provide a qualitative measure of grease penetration. As interest grows for incorporating recyclable plastic film structures into packaging for high fat content products, a simple technique is required for determining a film’s grease barrier properties and for ranking of different flexible film structures. Hence, a semi-quantitative method to measure grease/oil permeation through multi-layer films has been developed, and the results of several multilayer film structures are presented to delineate the efficacy of different film resins in improving the grease barrier properties of polyethylene multilayer films. The present study shows that it is now possible to develop cost effective and recyclable polyethylene film packaging structures with good grease barrier performance by utilizing certain single site catalyzed bimodal polyethylene (PE) resin architectures.