Patent ID: 8273447
Filing Date: 2012-09-25
Classification: B32B,Y10T

Abstract:
1. A multilayer oriented film comprising: at least one layer (a) comprising one or more homo-polyesters and/or copolyesters characterized by a % of crystallinity higher than 15, layer (b) comprising one or more polyolefin-based adhesive resins selected from one or more of ethylene-unsaturated acid copolymers, ethylene-unsaturated ester copolymers, modified polyethylene homopolymer, modified ethylene-α-olefin copolymers, modified ethylene-vinyl acetate copolymers, modified ethylene-alkyl(meth)acrylate copolymers, modified ethylene-(meth)acrylic acid copolymers, modified ethylene-propylene copolymer, modified ethylene-propylene-α-olefin co-polymers, and a layer (c) comprising one or more co-polyesters characterized by a % of crystallinity lower than 15, is positioned between the two layers (a) and (b) in such a way that one of the two principal surfaces of layer (c) is directly adhered to layer (a) and the other is directly adhered to layer (b), an outer layer (d) which comprises one or more heat-sealable polyolefins selected from one or more of ethylene homo-polymers, heterogeneous or homogeneous ethylene-α-olefin copolymers, ethylene-vinyl acetate co-polymers, ethylene-(C a core gas-barrier layer (e) between layers (b) and (d) comprising ethylene/vinyl alcohol copolymer, wherein layers (a), (b), (c), (d), and (e) are fully coextruded together.