Elastic polyethylene compositions

Details Elastic polyethylene compositions Elastic polyethylene compositions

C - Chemistry, Metallurgy

08

L

C08L 23/06 (2006.01) C08J 5/18 (2006.01) C08L 23/04 (2006.01)

Patent

CA 2161093

Polyethylene compositions exhibiting varying degrees of crystalline-amorphous regions are disclosed. Such materials are obtained by combining high molecular weight homopolymer polyethylene chains (Mw greater than or equal to about 15 x 106) with conventional polyethylene polymers, such as low density, linear low density, and high density. Blend compositions in accordance with the invention exhibit non-linear elongational characteristics, due to enhanced elasticity, and are particularly suitable for film blowing and associated applications such as oriented and non-oriented packaging films and molding applications.

L'invention concerne des compositions de polyéthylène présentant différents degrés de régions amorphes cristallines. On obtient lesdits matériaux en combinant des chaînes de polyéthylène homopolymères de masse molaire élevée (Mw supérieure ou égale à environ 1,5 x 10<6>) avec des polymères polyéthyléniques classiques de basse densité, de haute densité et de basse densité linéaire. Les mélanges selon l'invention présentent des caractéristiques d'allongement non linéaire de par leur élasticité accrue et sont particulièrement appropriées au soufflage de films et à des applications associées telles que la fabrication de feuilles d'emballage orientées et non orientées ainsi que le moulage.

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