| abstract |
The present invention relates to an optical polyester, and more particularly, consisting of a polyester film having a refractive index of 1.6 ~ 1.7, a polyurethane resin coating layer formed on one side thereof and an acrylic resin coating layer formed on the opposite side, each coating layer The refractive index difference between the refractive index and the polyester film is 0.05 or more, the thickness of each coating layer is 0.03 ~ 0.1 ㎛, relates to an optical polyester film of 91% or more total light transmittance of the entire film. The polyester film according to the present invention has a higher total light transmittance than a polyester film without a coating layer, and has a coating layer, which is more suitable for use as an optical polyester film because of excellent adhesion between the polyester film and the post-processing resin. |