MULTI-LAYERED FIRE DOOR AND METHOD FOR THE MAKING OF SAME

A door has a core that includes a porous layer having a thickness and two opposing major surfaces. In one construction, the core also includes three fire-retardant layers, and two of the fire-retardant layers are separated by the porous layer. The porous layer and the fire-retardant layers are coupl...

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Bibliographische Detailangaben
Hauptverfasser: OLSON, BRENT DAVID, LEWALLEN, KEITH LYNN, CLARK, RANDY JON, KOEPKE, GARY LEE, TRANSUE, WILLIAM ROBERT
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:A door has a core that includes a porous layer having a thickness and two opposing major surfaces. In one construction, the core also includes three fire-retardant layers, and two of the fire-retardant layers are separated by the porous layer. The porous layer and the fire-retardant layers are coupled together. Other constructions include one or more fire-retardant layers in balanced or unbalanced placement around the porous layer.