| abstract |
A flexible packaging web comprising a non-oriented sealant film is disclosed, wherein the non-oriented sealant film comprises: a thermoplastic base layer of a material selected from the group consisting of ethylene/vinyl alcohol copolymer, ethylene/norbornene copolymer, polyamide and blends thereof,a heat sealing layer positioned adjacent to the base layer, and a metal coating deposited on the base layer wherein the thickness of the metal coating is between 1.0 to 100 nanometers; wherein the non-oriented sealant film is characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%; wherein the non-oriented sealant film is a coextruded blown film; and wherein the packaging web has an oxygen gas transmission rate of between 0 to 10.0 cm3/100 in2/24 hours at 73 Deg. F. (0 to 155 cm3/m2/24 hours at 23 Deg. C.) and 0% relative humidity and a water vapour transmission rate of between 0 to 0.1 g/100 in2/24 hours at 100 Deg. F. (0 to 1.55 g/m2/24 hours at 38 Deg. C.) and 90% relative humidity. |