Stretched polyester film having an antistatic coating comprising a polymer having pyrrolidium rings in the main chain

A stretched antistatic laminate film comprising at least one coating layer having a thickness in the range from 0.01 to 5 .mu.m and containing a polymer having pyrrolidium rings in the main chain of the polymer on a polyester film layer, said polymer having pyrrolidium rings in the main chain of the polymer containing the repeating unit represented by the following formula (I) or (II):

• ##STR7## wherein R.sup.1 and R.sup.2 independently represent respectively an alkyl or phenyl group which may be substituted, R.sup.1 and R.sup.2 may chemically bond to form a ring, or one of R.sup.1 and R.sup.2 represents a hydrogen atom and X.sup.- represents a halogen atom, an inorganic acid residue, and organic sulfonic acid residue or a carboxylic acid residue, said coating layer being formed on the polyester film layer by an in-line coating method, said in-line coating method comprising applying said coating layer to a uniaxially stretched polyester film which has been uniaxially stretched by 2-6 times at a temperature from 60 to 130.degree. C. by a roll stretching method and then optionally drying, stretching the resultant coated uniaxially stretched polyester film by 2-6 times at a temperature from 80.degree. to 130.degree. C. in the direction perpendicular to the uniaxial stretching direction and then heat treating the coated stretched polyester film at a temperature from 150.degree. to 250.degree. C. for 1 to 600 seconds.