Patent ID: 7534487

Claim:
A transparent, electrically conductive biaxially oriented, single- or multilayer polyester film, comprising a non-stretched coating which comprises (a) conductive (ITO) indium tin oxide particles or (ATO) antimony tin oxide particles, or a mixture of these, said film also comprising one or more organic conductive polymers (b), said conductive polymers (b) being found either in the coating comprising ITO particles and/or ATO particles and/or in a layer in contact therewith, wherein the conductive coating has a surface resistivity of from 10 0 to 10 7 ohm/cm 2 , said film exhibits a higher conductivity than a comparable film absent said organic conductive polymers (b), the organic conductive polymer (b) is a substituted or unsubstituted pyrrole-containing polymer, a substituted or unsubstituted thiophene-containing polymer, a substituted or unsubstituted aniline-containing polymer, or a polyisothianaphthene, said coating further comprising acrylic copolymers, present in an amount of up to 10% by night, said acrylic copolymer including from 1 to 15% by weight of intermolecular-crosslinked comonomer and the proportion of ITO and/or ATO particles, based on the dry residue of the coating, is within the range from 30 to 99.8% by weight.