| 摘要 |
A multi-layer insulating slab having a core layer of oriented mineral fibres and at least one cover layer is designed, in order to achieve higher compressive stress resistance, transverse tensile strength and flexural strength, in such a manner that the core layer (13) is a self-supporting lamella element (13) of oriented mineral fibres, which is built up of a multiplicity of longitudinal bars (14a to 14e), which are bonded together at their side surfaces (15a to 15d) and are sections of mineral fibre slabs (10), and that the core layer (13) is firmly bonded on one or both sides to a curable or prefabricated cover layer. An advantageous process for manufacturing the multi-layer insulating slab consists in bonding a multiplicity of mineral-fibre slabs of desired length and with fibres lying in the plane of the slab in a laminated state to form a block, which is cut lengthways and perpendicular to the plane of the bonded mineral-fibre slabs in each case to form a lamella element of the desired thickness, which comprises longitudinal bars, which are firmly bonded together, in the form of a self-supporting slab of lamella construction, in which the mineral fibres are essentially arranged in one plane, which plane extends parallel to the bonded-together side surfaces of the longitudinal bars of this lamella element, after which the resulting lamella element is firmly bonded to at least one curable or prefabricated cover layer to form the multi-layer insulating slab. <IMAGE>
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