Matt, uv-stable, co-extruded polyester film, a method for the production thereof and the use of the same

A coextruded, biaxially oriented polyester film composed of a base layer which is composed of at least 70% by weight of a thermoplastic polyester, and of at least one outer layer, where the film comprises a UV stabilizer selected from 2-hydroxy-benzotriazoles, triazines, and mixtures of these, the total amount present being in the range from 0.01 to 5% by weight, based on the weight of crystallizable polyethylene terephthalate, and has a matt outer layer which comprises a mixture and/or a blend made from two components I and II, where component I is essentially a polyethylene terephthalate homopolymer or polyethylene terephthalate copolymer or a mixture made from polyethylene terephthalate homopolymer or from polyethylene terephthalate copolymers, and component II is a copolyester made from at least 65 mol % of isophthalic acid as acid component, where appropriate from aliphatic dicarboxylic acid, from a sulfomonomer which contains a metal sulfonate group on the aromatic moiety of an aromatic dicarboxylic acid, and from an aliphatic or cycloaliphatic glycol.