| 摘要 |
<p>Disclosed herein is a multilayered polyester base film for optical tapes, comprising a polyester film and an active energy ray-curing layer formed on one side of said polyester film, a surface hardness of the active energy ray-curing layer being not less than H, a center line average roughness (Ra<A>) of the surface (A surface) of the active energy ray-curing layer being not more than 0.005 mu m, a center line average roughness (Ra<B>) of the exposed surface (B surface) opposite of the polyester film from the active energy ray-curing layer being 0.005 to 0.3 mu m, and a light transmittance of said multilayered base film being 30%.</p> |
