KraussMaffei has promoted a joint cooperation project funded by the German Federal Ministry for Economic Affairs and Energy (BMWi). The common aim of the project partners was to develop a closed value-added chain for thermoset rigid phenolic foam
– starting from the production, through planning, construction and operation up to material recycling. The highly innovative rigid foam products are ideal for the use as load-bearing insulating composite components in the building sector, e. g. for mounting solar modules or air-conditioning systems on roofs or for the installation of windows, railings or awnings to the building façade.

KraussMaffei promotes research project

Within the frame of this project, KraussMaffei’s extrusion division actually succeeded in matching the phenolic compound formulation and the process control in order to be able to extrude boards with low density, high mechanical stability, low thermal conductivity and good fire resistance on a co-rotating twin-screw extruder. “The excellent fire properties of the new thermoset foam boards are indeed something very special,” declares Andreas Madle, process engineer in the Process-Engineering Development Division and project manager at KraussMaffei. Even without the addition of flame retardants, the new material is extremely flame resistant and hence classified as fire protection class B1.

Optimally configured twin-screw extruder keeps cross-linkage under control

The ZE 42 BluePower twin-screw extruder available in KraussMaffei’s R&D center in Hannover was used for the production of the foam boards with a thickness of 50 mm. In terms of process-engineering characteristics, this

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