Patent ID: 8084537

Claim:
A molded article comprising a polymer blend comprising: (i) a first polyolefin; (ii) a second polyolefin; and (iii) an ethylene/α-olefin interpolymer consisting of ethylene and one or more C 3 -C 20 linear aliphatic α-olefin monomer, wherein the first polyolefin, the second polyolefin and the ethylene/C 3 -C 20 linear aliphatic α-olefin interpolymer are different and wherein the ethylene/C 3 -C 20 linear aliphatic α-olefin interpolymer is a block interpolymer comprising at least about 50 mole percent ethylene and: (a) has a M w /M n from about 1.7 to about 3.5, at least one melting point, T m , in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of T m and d correspond to the relationship: T m >−2002.9+4538.5( d )−2422.2( d ) 2 , or (b) has a M w /M n from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔH in J/g, and a delta quantity, ΔT, in degrees Celsius defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships: Δ T>− 0.1299(Δ H )+62.81 for ΔH greater than zero and up to 130 J/g, Δ T> 48° C. for ΔH greater than 130 J/g, wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 30° C.; or (c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α-olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when the ethylene/α-olefin interpolymer is substantially free of a cross-linked phase: Re> 1481−1629( d ); or (d) has a storage modulus at 25° C., G′(25° C.), and a storage modulus at 100° C., G′(100° C.), wherein the ratio of G′(25° C.) to G′(100° C.) is in the range of about 1:1 to about 9:1.