| 摘要 |
The invention provides a multilayer film having an oxygen transmission rate of about 10,000 cc (STP)/m<SUP>2</SUP>/day/atm or greater at 23° C and 0% relative humidity, a modulus of about 15,000 psi or greater in at least one direction. The multilayer film can be used for packaging a wide variety of products requiring regulation o f oxygen permeability under varying packaging conditions because the multilayer film is capable of providing a relatively high OTR without sacrificing the mechanical properties that may be necessary for many packaging applications. The multilayer film may include a sealant layer, a stiffening layer, and a core layer disposed between the sealant and stiffening layers. In one embodiment, the sealant layer comprises a polyethylene having a density of less than 0.93 g/cc; the core layer consists of an ethyl ene/alpha-olefin having a density of 0.90 g/cc or less; and the stiffening layer comprises a styrene/butadiene/styrene block copolymer having a modulus of about 250,000 psi. |
