Polyolefin compositions and blown films obtained therefrom

Details Polyolefin compositions and blown films obtained therefrom Polyolefin compositions and blown films obtained therefrom

C - Chemistry, Metallurgy

08

L

C08L 23/10 (2006.01) C08L 23/14 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2211392

Polyolefin compositions comprising: A) a heterogeneous polyolefin composition itself comprising a fraction (A1) which is insoluble in xylene at room temperature and a fraction (A2) which is soluble in xylene at room temperature; and B) a branched propylene polymer. The said compositions are particularly processable when used in the process for the preparation of blown films. The films obtained by the said process are moreover characterized by excellent mechanical properties.

Ces compositions de polyoléfine comprennent: A) une composition de polyoléfine hétérogène comportant une fraction (A1) insoluble dans le xylène à température ambiante et une fraction (A2) soluble dans le xylène à température ambiante, et B) un polymère de propylène ramifié. Ces compositions présentent notamment une bonne aptitude à la mise en oeuvre lorsqu'on les utilise dans le procédé de préparation de films tubulaires. De surcroît, les films obtenus à l'aide de ce procédé sont caractérisés par d'excellentes propriétés mécaniques.

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