Patent ID: 6849313

Claim:
A multilayer film for packaging having a peel strength values from about 1 to 20 N/15 mm, comprising at least one sealing layer comprising a polyolefin composition consisting essentially of: 20-50% by weight (A), 50-80% by weight (B), and 1-20% by weight (C), wherein (A) is a low-density polyethylene (LDPE), high-density polyethylene (HDPE) or ethylene-vinylacetate copolymer (EVA) having a Melt Flow Rate (MFR) higher than 0.3 g/10 min; (B) is a composition selected from the group consisting of: (i) B1, a random copolymer of propylene with 7 to 40% by weight of a CH 2 ═CHR alkene, where R is an alkyl group containing from 2 to 6 carbon atoms, and from 0.5 to 6% by weight of ethylene as additional comonomer; (ii) a composition comprising (a) at least 20% by weight B1, and (b) B2, a random copolymer of propylene with up to 10% by weight of ethylene; (iii) a composition comprising (a) at least 20% by weight B1; and (b) a propylene homopolymer; and (iv) a composition comprising (a) at least 20% by weight B1; (b) B2, and (c) a propylene homopolymer, and (C) is a copolymer selected from the group consisting of: (C1) copolymers of propylene with 45-60% by weight of one or more CH 2 ═CHR alkenes, where R is an alkyl group containing 2 to 6 carbon atoms, or copolymers of propylene with 45-60% by weight of the one or more CH 2 ═CHR alkenes and with 0 to 6% by weight ethylene; (C2) copolymers of 20 to 80% by weight ethylene with one or more CH 2 ═CHR′ alkenes, where R′ is an alkyl group containing from 1 to 6 carbon atoms, the copolymers of ethylene containing from 0 to 30% of fraction insoluble in xylene at 25° C., or copolymers of 20 to 80% by weight ethylene with one or more of the CH 2 ═CHR′ alkenes and from 1 to 10% by weight of a diene, the copolymers of ethylene containing from 0 to 30% by weight of a fraction insoluble in xylene at 25° C.; and (23) saturated or unsaturated block copolymers, linear or branched, containing at least one comonomer selected from the group consisting of butadiene, butene, ethylene, and neoprene.