Multilayer oriented film

A process of making a film comprising:

• coextruding together layers (a), (b), (c), (d), and (e) to form a fully coextruded film, wherein
• layer (a) comprises one or more homo-polyesters and/or copolyesters characterized by a % of crystallinity higher than 15,
• layer (b) comprises 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,
• layer (c) comprises one or more co-polyesters characterized by a % of crystallinity lower than 15, wherein layer (c) is positioned between 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),
• layer (d) is an outer layer 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-(C1-C4) alkyl acrylate or methacrylate co-polymers, ethylene-acrylic acid co-polymers, and ethylene-methacrylic acid co-polymers, and
• layer (e) is a core gas-barrier layer between layers (b) and (d) comprising ethylene/vinyl alcohol copolymer.