Patent ID: 9507056
Filing Date: 2016-11-29
CPC Classification: C08G,C08J,C08K,C08L,C09D,C09J,G02B,Y10T

Claim Text:
1. A laminated polyester film comprising: a polyester film and a coating layer which is formed on at least one surface of the polyester film and is produced by applying a coating solution comprising a polyester resin having a naphthalene skeleton, a metal oxide, and two or more kinds of crosslinking agents, thereonto, wherein the only crosslinking agents present in the coating solution are selected from the group consisting of isocyanate compounds, oxazoline compounds, epoxy compounds, carbodiimide compounds, mixtures thereof, and reaction products thereof; a content of the polyester resin having a naphthalene skeleton in the coating solution is 5 to 67% by weight based upon an amount of amount of non-volatile components in the coating layer; a content of the metal oxide in the coating solution is 3 to 70% by weight based upon an amount of amount of non-volatile components in the coating layer; a content of the two or more kinds of crosslinking agents in the coating solution is 1 to 50% by weight based upon an amount of amount of non-volatile components in the coating layer; and the coating layer has an absolute reflectance having one minimum value in a wavelength range of 400 to 800 nm as measured on a surface thereof, and the absolute reflectance at the minimum value is not less than 4.0%.