READILY BONDABLE POLYESTER FILM FOR OPTICAL USE AND LAMINATED POLYESTER FILM FOR OPTICAL USE

摘要

There is provided a readily-adhesive polyester film for optical applications that suppresses rainbow reflections under fluorescent lamps and has excellent adhesion to a hard coating layer and exhibits excellent adhesion at high temperatures and high humidities (resistance to humidity and heat). The readily-adhesive polyester film for optical applications includes a biaxially-stretched polyester film; and a coating layer that is stacked on at least one side of the polyester film and produced by a process including: applying, to at least one side of the polyester film, an aqueous coating liquid containing a resin composition including (A) an aqueous polyester resin and (B) at least one of a water-soluble titanium chelate compound, a water-soluble titanium acylate compound, a water-soluble zirconium chelate compound, or a water-soluble zirconium acylate compound, as main components, wherein the mixing ratio (A)/(B) is from 10/90 to 95/5 by mass; drying the coating; and then stretching the coating in at least one direction.