| abstract |
In order to provide sandwich composite elements (100) having an improved fire protection behavior, the invention relates to a method for continuously producing sandwich composite elements (100) having a lower cover layer (10), an upper cover layer (11), and a polyurethane hard-foam core body (12) introduced between the cover layers (10, 11), wherein a double-belt conveyor system (18) having a lower conveyor belt (19) and an upper conveyor belt (20) is provided and wherein the lower cover layer (10) and the upper cover layer (11) continuously run in between the conveyor belts (19, 20), wherein at least one glass-fiber mat (13) continuously runs in between the cover layers (10, 11) and is arranged adjacent to the inside of at least one of the cover layers (10, 11) and wherein a subsequently foaming reaction mixture (14) is applied to at least one inside of the cover layers (10, 11) and/or to the glass-fiber mat (13) in order to form the polyurethane hard-foam core body (12). |