| 摘要 |
PURPOSE:To realize a charged state coincident with utility of a film by providing a coating layer containing a charge control agent at least on one side surface of a polyester film, and regulating the charged amount of the film surface and positive or negative of the charge. CONSTITUTION:A coating layer containing charge control agent is provided at least on one side of a polyester film. As the film, a crystalline oriented film is preferable. As the agent, metalcontaining azo compound, metal compound of salicylate derivatives known as charge regulator of toner used for an electrophotographic copying machine are used. The coating layer contains, in addition to the agent, binder resin containing polyester, polyurethane, acrylic resin, etc., as main ingredients. The agent is contained at 0.5-20wt.% in the coating layer, and it is preferable to mix an antistatic agent with the coating layer as required. |
