Patent ID: 6677031
Filing Date: 2004-01-13
Classification: B32B,G02B,Y10S,Y10T

Abstract:
A multilayer film comprising a first layer comprising mainly a polyester whose main recurring unit is ethylene-2,6-naphthalene dicarboxylate and a second layer comprising mainly a thermoplastic resin which is different from the polyester of the first layer, wherein at least one of the first and second layers contains 0.001 to 0.5 wt % of inert fine particles selected from the group consisting of (a) inert fine particles having an average particle diameter of 0.1 to 0.2 &mgr;m and (b) a combination of inert fine particles having an average particle diameter of 0.1 to 0.2 &mgr;m and inert fine particles having an average particle diameter of 0.32 to 1 &mgr;m; the first and second layers each have a thickness of 0.05 to 0.3 &mgr;m and are laminated alternately to form a laminate comprising at least 11 layers; the laminate is oriented at least in one direction; and the second layer has a lower refractive index than the first layer at least in one direction.