Biaxially oriented, coextruded polyester films with a base layer at least
90% by weight of which is composed of a thermoplastic polyester,
preferably polyethylene terephthalate (PET), and with at least one
sealable outer layer and a second nonsealable outer layer and, if desired,
with other intermediate layers, and comprising at least one UV absorber,
preferably hydroxybenzotriazoles and triazines, have high UV resistance,
do not embrittle when exposed to high temperatures, have a surface without
undesirable haze and are suitable for numerous indoor and outdoor
applications. The outer layers comprise antiblocking agents, such as
silica with an average particle diameter preferably below 50 nm and/or
above 2 .mu.m, and the sealable outer layer is preferably composed of a
copolyester which has been built up from ethylene terephthalate units and
ethylene isophthalate units.
