ANTISTATIC COATING COMPOSITION CONTAINING AN ELECTROCONDUCTIVE POLYMER, STRETCH OVING AGENT AND FILLER

摘要

A process is provided for adhering an antistatic layer to a dimensionally stable polyester film support, e.g. a film of polyethylene terephthalate. To an unstretched or only monoaxially stretched polyester film is applied an antistatic layer from an aqueous coating composition. After drying of the antistatic layer it is stretched biaxially or in a direction perpendicular to the first stretching operation, together with the polyester film support and thereafter the polyester film is heat-setted. The aqueous coating composition comprises 30 to 80% by weight of an electroconductive product, 10 to 40 % by weight of a stretch improving agent and 10 to 40 % by weight of an inert filler material. The polyester film support may be provided on its opposite side with a subbing layer and one or more lightsensitive gelatin silver halide emulsion layers.