| abstract |
A flexible packaging web having a co-extruded unstretched metallized sealant film with improved oxygen barrier properties, water vapor barrier properties and / or sealing properties. A flexible packaging web comprising a) a coextruded unstretched metallized sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the unstretched metallization The sealant film comprises (1) a thermoplastic base layer 11 made of a material selected from the group consisting of ethylene / vinyl alcohol copolymer, ethylene / acrylic acid copolymer, ethylene / norbornene copolymer, polyamide, and blends thereof; 2) A metal coating 12 that adheres to the base layer and has an optical density of 1.0 to 3.0; and (3) a flexible packaging web comprising a heat seal layer 13. [Selection] Figure 1 |