| abstract |
In a specific embodiment, a multilayer board includes a substrate including a cover layer and a core layer, the cover layer comprising a polymer material, wherein when bonded, the cover layer forms a first surface of the substrate and the core layer Forming a second surface of the substrate; a first coating layer disposed on the first surface of the substrate, wherein the first coating layer is a hard coating layer; and a second coating layer disposed on the second surface of the substrate Surface, wherein the second coating is a flexible coating; wherein the multilayer board passes a falling ball test from a distance greater than or equal to 50 cm. |