Fire performance for wood veneer laminated ceiling tile
AssigneeArmstrong World Industries, Inc.
InventorsMarsha S. BISCHEL, Kenneth P. KEHRER, Lida LU, Michelle X. WANG
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Abstract
The present invention is directed to a building panel having a laminate structure comprising a cellulosic layer; and a topcoat layer that is substantially impervious to ambient moisture. The topcoat layer comprises a sealant sub-layer, an intumescent sub-layer comprising an intumescent composition, and the sealant sub-layer is positioned between the cellulosic layer and the intumescent sub-layer such that the intumescent sub-layer is separated from the first major surface of the cellulosic layer by the sealant sub-layer. The resulting building panel exhibits superior flame retardancy resulting in a Class A fire rating, according to ASTM E-84.
Claims20
A ceiling panel comprising a laminate structure, the laminate structure comprising:
- a cellulosic veneer layer comprising a first major surface opposite a second major surface;
- a topcoat layer comprising:
- a first sub-layer atop the cellulosic veneer layer, the first sub-layer comprising a sealant composition comprising a first polymer;
- and
- a second sub-layer atop the first sub-layer, the second sub-layer comprising the intumescent composition.
- an adhesive layer formed from an adhesive composition comprising a thermoplastic polymer;
- and
- a metallic substrate layer, the cellulosic veneer layer at least partially bonded to the metallic substrate by the adhesive layer.
A ceiling panel comprising a laminate structure, the laminate structure comprising:
- a topcoat layer comprising:
- a sealant composition;
- and
- an intumescent composition;
- a cellulosic veneer layer having a first major surface opposite a second major surface;
- an adhesive layer formed from an adhesive composition comprising a thermoplastic polymer;
- and
- a metallic substrate layer.
A building panel comprising a laminate structure, the laminate structure comprising:
- a cellulosic layer;
- and
- a topcoat layer that is substantially impervious to ambient moisture, the topcoat layer comprising:
- a sealant sub-layer;
- and
- an intumescent sub-layer comprising an intumescent composition;
- the sealant sub-layer positioned between the cellulosic layer and the intumescent sub-layer such that the intumescent sub-layer is separated from the first major surface of the cellulosic layer by the sealant sub-layer.
Dependencies are inferred from the claim text.