| 摘要 |
The invention relates to a sandwich sheet metal, in particular for producing components or vehicle body parts, comprising metallic cover sheets (1.1, 1.2) and at least one core layer (1.3) which is located between the cover sheets, is made of polymer and is integrally joined to the cover sheets (1.1, 1.2). The core layer (1.3) of the sandwich sheet metal has a fibrous substrate and a polyurethane matrix that surrounds the fibres of the substrate, the polyurethane matrix being formed from an aqueous solvent-free polyurethane dispersion, the fibres being present in the polymer matrix as shorter fibre pieces having a maximum fibre length of 0 mm. The fibres of the substrate are preferably composed of mineral fibres, in particular of ceramic fibres. The sandwich sheet metal (1) as per the invention is characterised by a cost-efficient, light core layer that increases the potential uses of the sandwich sheet metal. A method for producing such a sandwich sheet metal is also disclosed. |
