Fire performance for wood veneer laminated ceiling tile

The present invention is directed to a building panel having a laminate structure， the laminate structure including a topcoat layer comprising a first intumescent composition， a cellulosic veneer layer， an adhesive layer formed from an adhesive composition comprising a second intumescent composition， and a metallic substrate layer and wherein the cellulosic veneer layer is at least partially bonded to the metallic substrate by the adhesive layer. The resulting building panel exhibits superior flame retardancy resulting in a Class A fire rating， according to ASTM E-84.

本发明涉及一种具有层压结构的建筑板材，该层压结构包含由第一膨胀型组合物（intumescent composition）构成的面涂层、纤维素饰面层（cellulosic veneer layer）、由包含第二膨胀型组合物的胶粘剂组合物制成的胶粘剂层，以及金属基材层（metallic substrate layer）；且所述纤维素饰面层通过所述胶粘剂层至少部分地与所述金属基材结合。所得建筑板材具备优异的阻燃性能，依据ASTM E-84标准可达到A级防火等级。