| 摘要 |
Disclosed is a multilayer film comprising a first layer comprising a blend of: (1) a first ethylene/alpha-olefin copolymer having a Mw/Mn of from about 1 to 3.0 and a density of from about 0.91 g/cc to about 0.925 g/cc, the first ethylene/alpha-olefin copolymer having a first melting point of from about 85 Deg. C to about 110 Deg. C and a second melting point of from about 111 Deg. C to about 125 Deg. C; and (2) a second ethylene/alpha-olefin copolymer having an Mw/Mn greater than 3.0 and a density of from about 0.90 to about 0.91 g/cc; wherein the first ethylene/alpha-olefin copolymer comprises from about 5 to about 40 weight percent of the blend, and the second ethylene/alpha-olefin comprises from about 60 to about 95 weight percent of the blend, and wherein the total amount of the blend in the first layer and in any other layers of the film comprises from about 40 to about 99 weight percent of the total weight of the multilayer film, with the multilayer film having a total free shrink at 85 Deg. C of at least 60 percent and a peak load impact strength of at least 135 Newtons per mil, with the multilayer film further comprising a second layer comprising a thermoplastic polymer. These films exhibit an improved combination of shrink and impact strength and are suitable for packaging food product such as meat or cheese, particularly fresh red meat, smoked meat, processed meat, or poultry. |
