Patent ID: 7094465

Claim:
A coextruded, at least two-layer, transparent biaxially oriented polyester film with at least one base layer B which comprises at least 80% by weight of thermoplastic polyester, and with at least one overlayer A comprising polymer coextruded on the base layer B, and with at least one acrylic coating D, wherein a) fillers present in the base layer B are only those which are introduced into the base layer B by way of reground cut material; b) the overlayer A comprises an amount of from 500 to 2500 ppm of fillers, based on the weight of the overlayer A, c) the fillers are substantially composed of SiO 2 with a median particle diameter d 50 of from 10 to 60 nm and/or from 1.0 to 5 μm; and wherein d) at least the overlayer A has a continuous crosslinked acrylic coating D which is applied in the form of an aqueous dispersion to the film e) said film further exhibiting a coefficient of friction for the coated overlayer A against itself of less than 0.37.