| 摘要 |
<p>The subject invention pertains to a film structure suitable for the packagin g of perishable food, comprising at least one film layer which in turn comprises a blend of at least one homogeneous linear or substantiall y linear ethylene polymer and at least one polypropylene polymer, wherein the film structure is characterized as having a 2 percent secant modulus which is at least 8 percent greater than a comparable film structure prepared without the polypropylene polymer, an oxygen transmission rate of at least 700 cc(at STP)-mil/100 in.2-day-atm (0.027 cc-(at STP)-cm/cm2-day-MPa) at 25 .degree.C. The inventive film structures exhibit an optimized balance of properties, making them especially useful in modified atmosphere packages for perishable goods. The inventive films are particularly suited for the packaging of fresh fruits, vegetables, and other perishable items which would benefit from controlled access to environmental oxygen.</p> |
