Rocha, HelenaVasconcelos, MiguelMalheiro, JoanaNascimento, AntónioPaula, DelvesSimões, NunoBarreiros, Maria AlexandraCunha Diamantino, TeresaFerreira, CristinaGonçalves, DianaAntunes, Paulo2026-03-172026-03-172025-08Rocha, H., Vasconcelos, M., Malheiro, J., Nascimento, A., Paula, D., Simões, N., Barreiros, A., Diamantino, T., Ferreira, C., Gonçalves, D., & Antunes, P. (2025). Development of lightweight Sandwich Composites with improved Reaction to Fire and UV resistance for Double Curvature Façade Panels. In: ICCM24: 24th International Conference on Composite Materials, Baltimore, Maryland, USA, 4-8 August, 2025http://hdl.handle.net/10400.9/6313ABSTRACT: Buildings with double curvature façades can be aesthetically pleasing, being capable of enchanting both architects and the general public Though, manufacturing of such façades can be a challenge in both technologic and economic terms Traditional molding technologies demand a unique mold for each panel geometry resulting in substantial costs related to raw materials and storage space, and long lead times for designing and manufacturing. A reconfigurable multipoint mold has been identified to solve this issue, where an array of moving pins can have their height quickly adjusted to form the required shape and molding surface. Another present technological challenge is the highly demanding fire resistance requirements Certain European countries require that public and civil buildings comply with the highest grades of EN 13501 standard, A 2 s 1 d 0 and B, s 1 d 0. That is a serious constraint when developing lightweight sandwich fiber reinforced polymer FRP composites, as polymeric materials do not naturally present good reaction to fire behavior Furthermore, the polymeric raw materials should present suitable processability with the reconfigurable multipoint mold and supporting processing equipment and allow the manufacturing of sandwich structures Sandwich composites structures are lightweight solutions with high stiffness, consisting of two composite laminate faces, separated by a lightweight core material, commonly made of foam or honeycomb.engMaterialsUV filterFire protectionBuilding materialsconference object