Film layers made from polymer blends

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

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

Patent

CA 2512041

Film layers made from formulated polymer compositions are disclosed. Film layers made from such formulated compositions have suprisingly good heat seal properties, and an especially good reduction in heat seal initiation temperature. The polymer compositions preferably have at least one homogeneously branched ethylene/alpha-olefin interpolymer and at least one heterogeneously branched ethylene polymer. The homogeneously branched ethylene/alpha-olefin interpolymer has a density lower than that of the formulated composition and of the heterogeneously branched ethylene polymer.

La présente invention concerne des couches de film obtenues à partir de compositions de polymères préparées. Les couches de film réalisées à partir de ces compositions préparées présentent des propriétés de thermoscellage étonnamment bonnes et une diminution spécialement bonne de la température d'amorçage du thermoscellage. Les compositions de polymères comprennent au moins un interpolymère d'éthylène/alpha-oléfine ramifié de manière homogène et au moins un polymère d'éthylène ramifié de manière hétérogène. L'interpolymère d'éthylène/alpha-oléfine ramifié de manière homogène présente une densité inférieure à celle de la composition préparée et du polymère d'éthylène ramifié de manière hétérogène.

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