abstract |
The invention relates to an opaque, biaxially oriented polyester film comprising at least one base layer, characterised in that at least this base layer contains a cyclic olefin copolymer (COC) in a concentration of 2 to 60 wt. % in relation to the base layer, the glass transition temperature of said cyclic olefin copolymer (COC) being 70 to 270 °C; and in that at least one surface is provided with a coupling agent. |