White, one-sidedly matt, biaxially oriented polyester film, a method for their preparation and their use

摘要

The present invention relates to white, biaxially oriented polyester films, the at least one polyester-containing base layer (b) and at least one mat cover layer (a), the cover layer (a) in addition to the white pigment further particles, preferably sio₂, comprising an average diameter of from 2 to 10 μm, and wherein the cover layer (a) containing a polyester of isophthalic acid units. If appropriate, the film on at least one surface functionalized. These films are distinguished, in particular, by a low gloss of the cover layer (a), a high degree of whiteness and a high degree of reliability and are therefore also as a flexible packaging films for use on high-speed packaging machines suitable.