| 摘要 |
<p>A fluorescent retroreflective sheet of the confined-air type which comprises a surface-protective layer disposed on the side on which light is to strike, a binder layer connected to the surface-protective layer through a network bonding part, an air layer consisting of air confined by the network bonding part between the surface-protective layer and the binder layer, and a retroreflective element layer disposed between the surface-protective layer and the air layer (or between the binder layer and the air layer), wherein at least one layer located on the light incidence side of the confined-air layer contains at least one fluorescent dye selected from the group consisting of benzimidazole coumarin type fluorescent dyes represented by formula (1) and benzopyran type fluorescent dyes represented by formula (2). The sheet is excellent in appearance and long-lasting weatherability.</p> |
