| 摘要 |
A plant and a process for coating a multi-sided mineral fiber base layer with a surface coating in the form of a fibrous non-woven fabric formed of a thermoplastic polymer material on at least part of at least two sides of the base layer to form a mineral fiber element, wherein the plant comprises two or more coating devices, means for melting a thermoplastic polymer material, means for supplying the polymer melt obtained to the coating devices, wherein each coating device comprises a number of dispensing units comprising a number of orifices, means for extruding the polymer melt obtained through the orifices and distributing the extruded polymer material on the surface of the mineral fiber base layer, and means for directing one or more high pressure gas streams closely past the orifices in order to elongate the extruded polymer material so as to form thin filaments and/or fibers, and wherein the coating devices are arranged in separate successive coating stations in such a manner that the coating of individual base layer sides are effected in separate steps. |
