Insulating plate for bracket-mounted, rear-ventilated facades comprises covering layer having greater strength, especially plug passage strength, than base layer

摘要

An insulating plate (1), especially for bracket-mounted, rear-ventilated facades, comprises a base layer (11) and a covering layer (12), both made of the same bound mineral fibers. The covering layer has a greater strength, especially plug passage strength, than the base layer. The fibers of the mineral wool in the covering layer have a different thickness to the fibers of the base layer. The median value d50 of the fiber diameter of the fibers of the covering layer is about 50-100% greater than that of the fibers of the base layer, producing a reinforced three-dimensional supporting framework in the covering layer increasing the plug passage strength. An Independent claim is also included for a method for manufacturing the above insulating plate. Preferred Features: The median value d50 of the fiber diameter of the covering layer is 6-13, preferably 7-10, especially about 8 mu m. The median value d50 of the fiber diameter of the base layer is 3-6, preferably 4-5, especially about 4 mu m.