Patent ID: 8722790

Claim:
A polyolefin film comprising at least one layer of a polyolefin composition (I) comprising (percent by weight): A) 20% to 80% of a heterophasic polyolefin composition comprising: A I ) 3% to 30% by weight of a crystalline polymer fraction selected from: (i) a propylene homopolymer, having solubility in xylene at room temperature lower than 10% by weight, (ii) a copolymer of propylene and at least one α-olefin of formula H 2 C═CHR, where R is H or a C 2 -C 10 linear or branched alkyl, containing at least 85% by weight of propylene, having solubility in xylene at room temperature lower than 15% by weight or (iii) a mixture of (i) and (ii); and A II ) 70% to 97% by weight of an elastomeric fraction comprising at least an elastomeric copolymer of propylene with 12 to 88% by weight of ethylene, and having solubility in xylene at room temperature greater than 50% by weight; and B) 20% to 80% of at least one filler, wherein the film is a heat-sealable, blown film having an overall thickness of 12 to 150 micrometers, and wherein the polyolefin composition (I) has a melt flow rate from 0.1 to 10 g/10 min.