| abstract |
The present invention relates to a building panel having a laminated structure comprising a top cover layer comprising a first expansion agent composition, a cellulosic facing layer, an adhesive composition comprising a second expansion agent composition An adhesive layer and a metal substrate are formed, and wherein the cellulose facing layer is at least partially bonded to the metal substrate by the adhesive layer. The resulting building panels have excellent flame resistance with a Class A fire rating according to ASTM E-84. |