Composition suitable for high gloss blown film and films...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/08 (2006.01) B29C 49/00 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2605408

The invention is directed to a composition suitable for high gloss air quenched blown films. The films are comprised of from 2 to 15 percent by weight of a substantially isotactic propylene-based copolymer having a melt flow rate of at least 5 g/10 minutes and having from 8 to 21 mole percent units derived from an alpha olefin; and from 85 to 98 percent by weight of an ethylene-based copolymer having a melt index of from 0.1 to 9 g/10 minutes. An air quenched blown film made from the inventive composition exhibits a value for gloss greater than the value for gloss exhibited by an air quenched blown film made solely from the ethylene-based copolymer.

L'invention concerne une composition pour films soufflés à brillant élevé refroidis à l'air. Ces films sont comprennent entre 2 et 15% en poids d'un copolymère à base de propylène sensiblement isotactique présentant un indice de fluidité d'au moins 5 g/10 minutes et renfermant, en pourcentage molaire, entre 8 et 21 unités dérivées d'une alpha-oléfine, et entre 85 et 98% en poids d'un copolymère à base d'éthylène présentant un indice de fluidité compris entre 0,1 et 9 g/10 minutes. Un film soufflé refroidi à l'air constitué de la composition de l'invention présente une valeur de brillant supérieure à la valeur de brillant que présente un film soufflé refroidi à l'air uniquement constitué du copolymère à base d'éthylène.

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