Polymer film
AssigneeBorealis Technology Oy
InventorsIrene Helland, Merete Skar, Jani Äärilä, Marja Ora, Markku Vahteri
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Abstract
A film of a polyethylene produced by polymerization catalysed by a single site catalyst and comprising as comonomers to ethylene at least two C4-12 alpha olefins, preferably but-1-ene and hex-1-ene.
Claims23
A film of a bimodal polyethylene produced by polymerization catalysed by a single site catalyst having more than one η5-cyclic ligand said bimodal polyethylene comprising
- ai) a lower molecular weight homopolymer of ethylene and
- bi) a higher molecular weight terpolymer of ethylene, 1-butene and a C6 to C12 alpha-olefin,
- or
- aii) a lower molecular weight polymer which is a binary copolymer of ethylene and a comonomer selected from C4 to C12 alpha-olefins and
- bii) a higher molecular weight polymer which is either a binary copolymer of ethylene and 1-butene, if the lower molecular weight polymer of aii) is a binary copolymer of ethylene and a C6 to C12 alpha-olefin, or a terpolymer of ethylene, 1-butene and a comonomer selected from C6 to C12 alpha-olefin;
- wherein all components are made by the same catalyst.
A polyethylene composition for film production, said composition comprising a bimodal polyethylene produced by polymerization catalysed by a single site catalyst having more than one η5-cyclic ligand comprising
- ai) a lower molecular weight homopolymer of ethylene and
- bi) a higher molecular weight terpolymer of ethylene, 1-butene and a C6 to C12 alpha-olefin,
- or
- aii) a lower molecular weight polymer which is a binary copolymer of ethylene and a comonomer selected from C4 to C12 alpha-olefins and
- bii) a higher molecular weight polymer which is either a binary copolymer of ethylene and 1-butene, if the lower molecular weight polymer of aii) is a binary copolymer of ethylene and a C6 to C12 alpha-olefin, or a terpolymer of ethylene, 1-butene and a comonomer selected from C6 to C12 alpha-olefin;
- wherein all components are made by the same catalyst.
A product packaged within a heat-sealed film of a bimodal polyethylene produced by polymerization catalysed by a single site catalyst having more than one eta5-cyclic ligand comprising
- ai) a lower molecular weight homopolymer of ethylene and
- bi) a higher molecular weight terpolymer of ethylene, 1-butene and a C6 to C12 alpha-olefin,
- or
- aii) a lower molecular weight polymer which is a binary copolymer of ethylene and a comonomer selected from C4 to C12 alpha-olefin and
- bii) a higher molecular weight polymer which is either a binary copolymer of ethylene and 1-butene, if the lower molecular weight polymer of aii) is a binary copolymer of ethylene and a C6 to C12 alpha-olefin, or a terpolymer of ethylene, 1-butene and a comonomer selected from C6 to C12 alpha-olefin;
- wherein all components are made by the same catalyst.
Dependencies are inferred from the claim text.