Polyolefin films suitable for institutional applications

C - Chemistry – Metallurgy – 08 – J

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C08J 5/18 (2006.01) B29C 55/12 (2006.01) B32B 27/32 (2006.01) C08L 23/04 (2006.01) C08L 23/10 (2006.01) C08L 23/08 (2006.01) C08L 23/14 (2006.01)

Patent

CA 2391545

Polyolefin films having high oxygen transmission values are composed of blends of more than about 10% by weight to about 60% by weight of isotactic polypropylene, about 10% by weight to about 25% by weight of low density polyethylene and about 15% by weight to less than about 80% by weight of an olefin heteropolymer containing propylene and at least one other -olefin of 2 to 4 carbon atoms having a melting point less than that of polypropylene and a density of no greater than about 0.95 g/cc.

La présente invention concerne des films polyoléfiniques présentant des valeurs de transmission d'oxygène élevées constitués de mélanges de plus d'environ 10 % en poids à environ 60 % en poids d'un polypropylène isotactique, d'environ 10 % en poids à environ 25 % en poids d'un polyéthylène à faible densité et d'environ 15 % en poids à environ moins de 80 % en poids d'un hétéropolymère oléfinique contenant du propylène et au moins une autre oléfine de 2 à 4 atomes de carbone présentant une température de fusion inférieure à celle du polypropylène et une densité au plus égale à 0.95 g/cc.

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