Abstract: Multi-layer, gas-barrier, either cast or solid-state oriented, heat-shrinkable, annealed or heat-set, films and sheets suitable for packaging applications which comprise a microlayer sequence (a) comprising a number n of identical repeating units (a?), each comprising the sequence A/B/C, wherein A is a layer comprising a major proportion of one or more thermoplastic (co)polyamides, B is either a layer comprising a major proportion of one or more ethylene-vinyl alcohol copolymers or a layer comprising a major proportion of a (co)polyamide characterized by an OTR of less than 100 cm3.25 ?m/m2.day.bar at 23° C. and 0% of RH, C is either nil or a layer comprising a major proportion of one or more thermoplastic (co)polyamides, and n stands for an integer of 3 or more, an outer layer (b) comprising one or more polymers selected from polyolefins, modified polyolefins, and thermoplastic (co)polyesters, and a tie layer between the outer layer (b) and the microlayer sequence (a).

Abstract: A gas-barrier multilayer film comprising at least an outer heat-sealable polyolefin layer, a core gas-barrier layer comprising one or more of EVOH and/or polyamides, and an outer bonding layer comprising one or more styrene-based polymers, characterized in that