Photographic polyester film and manufacturing method therefor

Abstract

A photographic polyester film and a manufacturing method therefor. The photographic polyester film includes a polyester base film, a primer layer formed of polyurethane resin on at least one surface of the polyester base film, and a subbing layer formed of a hydrophillic polymer on at least one surface of the primer layer. Also, a photosensitive layer may be stacked on the subbing layer. The photographic polymer film having the primer layer, the subbing layer and the photosensitive layer exhibits excellent interlayer adhesiveness between the hydrophobic polyester base film and the hydrophilic sensitive layer. Also, in the manufacture of the photographic polyester film, in particular, in the case of forming a subbing layer after a long time has passed from the formation of a primer layer, if a corona discharge treatment is performed on at least one surface of the polyester film with the primer layer prior to the formation of a subbing layer and then a high-temperature curing is performed after the formation of the subbing layer, the resulting photographic polyester film has a strong adhesiveness of the subbing layer to the primer layer.

Dependencies are inferred from the claim text.