Multiple layer film and composite material produced therefrom

A film, comprising:

• a polyamide layer comprising at least 40% by weight of at least one polyamide selected from the group consisting of PA6, PA66, PA6/66 and a copolyamide, wherein the copolyamide is obtained from PA6, PA66 and PA6/66 and comprises at most 50% of total monomer units replaced by aromatic monomer units;
• a second layer formed directly on the polyamide layer, wherein the second layer is obtained from a molding composition consisting of a polyamide composition (a) in an amount of from 50 to 99 parts by weight, a copolymer (b) in an amount of from 1 to 50 parts by weight with respect to a total amount of the polyamide composition (a) and the copolymer (b), and optionally at least one additive selected from the group consisting of a flame retardant, a stabilizer, an antistatic agent, a filler, a dye, and a pigment;
• and
• a first layer formed directly on the second layer, wherein the first layer comprises a molding composition which comprises at least 60% by weight of a polyetheresteramide, the monomer units of the polyamide of the polyetheresteramide comprise an average of at least 8 carbon atoms,
• wherein:
• the polyamide composition (a) consists of a polyamide (α) in an amount of from 40 to 100% by weight, and a polyamide (β) in an amount of 0 to 60% with respect to a total amount of the polyamide (α) and the polyamide (β);
• the polyamide (α) is PA612;
• the polyamide (β) is at least one selected from the group consisting of PA6, PA66, PA6/66, and a copolyamide, wherein the copolyamide is obtained from PA6, PA66 and PA6/66 and comprises at most 50% of total monomer units replaced by aromatic monomer units;
• the copolymer (b) comprises a first monomer unit in an amount of from 70 to 99.9% by weight and a second monomer unit in an amount of 0.1 to 30% by weight;
• the first monomer unit is a monomer unit of at least one vinyl compound selected from the group consisting of an acrylic acid derivative, a methacrylic acid derivative, an α-olefin and a vinylaromatic compound;
• and
• the second monomer unit comprises a functional group selected from the group consisting of a carboxylic anhydride group, an epoxy group, and an oxazoline group.