heat - sealable composite film having good surface slip with very good thermoforming properties based on polyamide and polyolefins , wherein the film consists of at least one layer of aliphatic polyamide and at least one layer of a polymer blend consisting of 10 - 60 wt . % of amorphous polyamide and 40 - 90 % of aliphatic polyamide and at least one thermoplastic heat sealing layer and at least one bonding layer , arranged in such a manner that a heat sealing layer and a layer of aliphatic polyamide are located on the outer sides of the film , and wherein the film is not stretched .