Film layers made from ethylene polymer blends

Details Film layers made from ethylene polymer blends Film layers made from ethylene polymer blends

C - Chemistry, Metallurgy

08

L

C08L 23/04 (2006.01) B32B 27/32 (2006.01) C08J 5/18 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2526873

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.

L'invention concerne des couches de film obtenues à partir de compositions de polymères d'éthylène préparées. Les couches de film obtenues à partir desdites compositions préparées présentent des propriétés de thermoscellage étonnamment bonnes et une réduction spécialement bonne de la température d'amorçage de thermoscellage. Lesdites compositions de polymères d'éthylène présentent au moins un interpolymère d'éthylène/alpha-oléfine ramifié de manière homogène et au moins un polymère d'éthylène ramifié de manière homogène ou hétérogène qui présente un indice de fusion inférieur au premier constituant mentionné. Le premier interpolymère d'éthylène/alpha-oléfine ramifié de manière homogène présente un indice de fusion supérieur à celui de la composition préparée.

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