초록 ▼

The invention concerns polyethylene compositions particularly adapted for the manufacture of film and hollow bodies by blow-moulding, characterized in that they contain (a) from 50 to 98% by weight of polyethylene of high density, of at least 0.940 (b) from 2 to 50% by weight of a linear, low densit

The invention concerns polyethylene compositions particularly adapted for the manufacture of film and hollow bodies by blow-moulding, characterized in that they contain (a) from 50 to 98% by weight of polyethylene of high density, of at least 0.940 (b) from 2 to 50% by weight of a linear, low density polyethylene, with a density below 0.930.

대표청구항 ▼

Polyethylene compositions, characterised in that they contain: (a) from 80 to 98% by weight of high density polyethylene having a density of at least 0.940, a melt index measured at 190°C. under a load of 5 kg (MI5) of 1.2 g/10 minutes or less, and a melt flow ratio defined by the ratio of MI5 to a

Polyethylene compositions, characterised in that they contain: (a) from 80 to 98% by weight of high density polyethylene having a density of at least 0.940, a melt index measured at 190°C. under a load of 5 kg (MI5) of 1.2 g/10 minutes or less, and a melt flow ratio defined by the ratio of MI5 to a melt index measured at 190°C. under a load of 2.16 kg, of 6 or higher, (b) from 2 to 20% by weight of linear low density polyethylene, of a density below 0.930 and a melt index of at least one-fourth the melt index of the high density polyethylene which is formed by copolymerizing 85 to 95% by weight ethylene with 15 to 5% by weight of one or more C3-C8 alpha-olefins, in the gaseous phase at a pressure below 4×106 Pa in the presence of a catalyst containing compound of a transition metal selected from the sub-groups IVa, Va and VIa of the Periodic Table, wherein the compositions have a melt index measured at 190°under a load of 2.16 kg of 0.12 g/10 min or higher.