Patent ID: 7122240

Claim:
A multilayer, transparent, biaxially oriented polyester film made from at least one base layer (B) which comprises at least 80% by weight of thermoplastic polyester, and from, applied to this base layer (B), at least one transparent, polyester high-gloss outer layer (A), wherein the transparent outer layer (A) also comprises an amount in the range from 0.05 to 0.5% by weight, based on the total weight of the outer layer (A), of a single pigment system which has the following features: a) the median grain diameter (d 50 ) is in the range from 1.5 to 5 μm and b) the spread of the distribution of the grain size, expressed by the SPAN 98, is less than or equal to 1.9, wherein said film is a packaging film exhibiting an average surface roughness, R a of 35 to 150 nm; a haze of less tan 2.5% and a gloss of greater than 170 measured at 20°.