Patent ID: 7794848

Claim:
A multilayer film comprising: (a) an ethylene-vinyl alcohol copolymer (EVOH) layer having a first surface and a second surface, (b) a first tie-layer adhesive bonded to the first surface and a second tie-layer adhesive bonded to the second surface of the EVOH layer, (c) at least one high density polyethylene (HDPE) layer bonded to the first tie-layer and at least one polyethylene layer selected from the group consisting of linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) bonded to the second tie-layer, wherein the multilayer film is post-oriented uniaxially in the machine-direction with a draw down ratio of greater than about 5 and wherein the post-oriented film has a water vapor transmission rate less than about 3.5 g-mil/m 2 -day and an oxygen transmission rate of less than about 2.5 cm 2 -mil/m 2 -day.