Dow Global Technolgoies LLC

Staci A DeKunder

Jesus Nieto

Kalyan Sehanobish

Wenbin Liang

Thomas Oswald

Shaun Eugene Pirtle

Jeffrey J Wooster

David B Ramsey

John L Presa

Thomas T Oswald

Shaun E Pirtle

Stretch films which exhibit good puncture and impact resistance while also exhibiting resistance to defect propagation are desired. The films of the present invention have an ultimate stretch of at least 200 percent, a dart impact strength of at least about 700 gms/mil and a catastrophic failure stretch of at least 95 percent of the elongation to break value (CF of 5 or less). The films preferably comprise at least 3 layers and preferably comprise at least 50 percent by weight of polyethylene polymers.

Films with superior impact resistance and improved catastrophic failure resistance under high strain rate

Film layers made from formulated ethylene polymer compositions are disclosed. Film layers made from such formulated compositions have surprisingly good heat seal properties, and an especially good reduction in heat seal initiation temperature. The ethylene polymer compositions have at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one homogeneously or heterogeneously branched ethylene polymer which has a lower melt index than the first mentioned component. The first homogeneously branched ethylene/alpha-olefin interpolymer has a melt index higher than that of the formulated composition.

Film layers made from ethylene polymer blends

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Pearland, TX, United States of America

Staci A DeKunder