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AssigneeGebr. Knauf Westdeutsche Gipswerke
InventorsAlfons Knuaf, Jorg Bold, Siegfried Franke
Estimating the term…
Fiber containing plaster boards are prepared by superimposing a plurality of board blanks one on top of the other such that the direction of the fiber orientation in the superimposed blanks deviates one from the other. The board blanks are formed in a conventional manner from a suspension of calcium sulfate capable of setting, reinforcing fibers and a quantity of water beyond the quantity of water necessary for setting the calcium sulfate capable of setting. After mechanically removing excess water from the suspension to form the board blanks, two or more of these blanks are placed one on top of the other and are connected under pressure and dried. Thereafter, a predetermined number of board blanks having a direction of the fiber orientation deviating one from the other, are placed one on top of the other and are pressed together prior to or during the setting of the calcium sulfate.
A monolithic, fiber-reinforced board which is sufficiently thick to be suitable for use as a floor element, which board comprises a plurality of layers each of which contains substantially homogeneously distributed reinforcing fibers and calcium sulfate binder, wherein the reinforcing fibers in each said layer are oriented predominantly in one direction, and wherein the direction of predominant fiber orientation in each layer deviates by about 90.degree. from that in adjacent layers, said plurality of layers being molded together under pressure prior to the setting of the calcium sulfate binder to consolidate said layers into a monolithic, fiber-reinforced board.
In a process for producing a monolithic, fiber-reinforced board which is sufficiently thick to be suitable for use as a floor element, which process comprises the steps of superimposing a plurality of fiber-reinforced board blanks, molding and drying;
Dependencies are inferred from the claim text.