| 摘要 |
<p>This invention relates to a composite structure having a porous surface and a multilayer film laminated to the porous surface. The multilayer film comprises a copolyester layer and a polymer layer wherein the copolyester layer is positioned between the substrate and the polymer layer. The polymer layer has a Rockwell Hardness value as determined by ASTM Method D785 of greater than or equal to R90. The composite structure is useful for interior or exterior applications, particularly as a re-usable concrete form board.</p> |
