Patent ID: 7101605

Claim:
A white, biaxially oriented polyester film which has a base layer B which comprises a thermoplastic polyester and pigment and/or filler consisting essentially of titanium dioxide, wherein the R value of the film is smaller than 43 daN/mm 2 , the e max ratio of the film is smaller than 2.5, and at least one of the two surfaces of the film has been provided with a crosslinked continuous coating comprising resin consisting essentially of an acrylate copolymer, said acrylate copolymer consisting essentially of acrylic monomer residue, methacrylic monomer residue and further containing a copolymerized self-condensing comonomer residue forming intermolecular crosslinks, wherein antiblocking agents are absent from said coating and the coated side(s) of said film exhibits a sliding coefficient of friction of less than 0.45.