| abstract |
PROBLEM TO BE SOLVED: To provide a polyester film having a novel coating layer which is excellent in transparency and gloss of a coating film, has excellent adhesion to a top coating comprising a coating film which is aqueous, and has excellent adhesion resistance. An application layer provided by applying a coating solution containing an oxazoline group-containing polymer (A) having an oxazoline equivalent of less than 300 g / equivalent and water-soluble to a film surface, followed by drying and stretching. A coating film obtained by coating an aqueous coating liquid on the coating layer. [Selection figure] None |