Patent ID: 7619038

Claim:
A film comprising a homogeneous blend of: 1) from 60 to 99 weight percent of one or more semi-crystalline polymers (based upon the weight of the semi-crystalline and semi-amorphous polymers), each semi-crystalline polymer comprising propylene and from 0 to 5 weight % alpha-olefin comonomer (based upon the weight of the polymer), said semi-crystalline polymers each having a melting point between 110 and 170° C., a heat of fusion of at least 80 J/g, and a 1% Secant Flexural Modulus of 100,000 to 250,000 psi, and a melt flow rate of 200 dg/min or less; and 2) from 1 to 40 weight % of one or more semi-amorphous polymers (based upon the weight of the semi-crystalline and semi-amorphous polymers), each semi-amorphous polymer comprising propylene and from 5 to 12 weight % of one or more comonomers, selected from the group consisting of ethylene, butene, pentene, hexene, heptene, octene, nonene, and decene, said semi-amorphous polymers each having: a) 10 to 50 percent crystallinity; b) a melt flow rate of 200 dg/min or less; c) a DSC melting point (second melt Tm) of 100° C. or less; d) an intermolecular composition distribution as determined by thermal fractionation in hexane such that 85% by weight or more of the polymer is isolated as one or two adjacent, soluble fractions with the balance of the polymer in immediately preceding or succeeding fractions; and wherein each of these fractions has a wt % comonomer content with a difference of no greater than 20 wt % relative to the average wt % comonomer content of the copolymer; e) an Mw/Mn of 1.5 to 4, f) a triad tacticity of three propylene units, as measured by 13 C NMR, of 75% or greater, and g) a heat of fusion of between 4 and 70 J/g; where the blend has: i) a melt flow rate of 0.5 to 100 dg/min; and ii) less than 5 weight % filler, based upon the weight of the polymers and the filler; and iii) a permanent set of greater than 65%; and where the film has: 1) a thickness of 2.5 to 635 microns; 2) a haze of 10% or less, prior to addition of clarifying or nucleating agents; 3) a 45 degree gloss of 85 or more; 4) a 1% Secant tensile modulus of 860 to 205 MPa; 5) an Elmendorf tear in the machine direction of 1.57 g/micron or more; 6) an Elmendorf tear in the transverse direction of 1.57 g/micron or more; and 7) a total energy impact at 23° C. of 2.7 J or more.