| abstract |
The invention discloses a polyurethane composite light wallboard and a manufacturing method thereof, wherein the composite light wallboard comprises the following layers which are arranged in sequence: the first surface layer, the first enhancement layer, the filling layer, the second enhancement layer and the second surface layer; the filling layer is homogeneous polyurethane hard foam prepared by reacting and curing 6-20 wt% of polyurethane hard foam foaming material, 50-79 wt% of inorganic filler and 15-30 wt% of reinforcing fiber. The overall density of the composite light wallboard prepared by the invention is less than or equal to 1200kg/m 3 The compression strength is more than or equal to 3.5MPa (GB/T23451-2009), the combustion performance reaches A-grade non-combustibility (GB 8624-. |