HEAT-SEALABLE POLYOLEFIN FILMS

摘要

Film or sheet comprising at least one layer of a polyolefin composition consisting, in percentage by weight referred to the sum of component (a1) and (a2) and (b), of: a1) 42-88 wt% of a propylene homopolymer or copolymer of propylene with ethylene and /or one or more C4-C10 a-olefin(s), the said homopolymer or copolymer having a solubility in xylene at room temperature (XSm) equal to or less than 10 wt%; a2) 7-39 wt% of a copolymer of ethylene with propylene and /or one or more C4- C10 a-olefin(s) containing 50-80 wt% of ethylene derived units and having a solubility in xylene at room temperature of 50-80 wt%; and (b) 0.5-30 wt%, of a butene-1 (co)polymer having: - a content of butene-1 derived units of 75 wt% or more, - a flexural modulus (MEF) of 70 MPa or less.