A composite sandwich structure consists of an inner core material, the so-called "spacer material" with low density at high volume, which is enclosed by two face layers. The layers are bonded together by special structural adhesives and by the resin system of the outer layers, respectively. Sandwich elements are among the most important composite structures in lightweight construction and are used in a wide range of industries, such as the automotive and transportation industries, aerospace, boat building, and also in mechanical engineering.
There are numerous possible combinations of cores and outer layers. Depending on the application, a glass, aramid or carbon textile, for example, is used for the cover layers. This can be a woven fabric, non-crimp fabric or even a nonwoven fabric from TENOWO. Depending on the application of the finished sandwich panel, the core materials vary from PU or PET foam, to honeycomb core structures made of paper or wood, to wool.
The latest development from TENOWO describes volume nonwovens as "spacer material". These are more attractively priced than foams, for example, and more sustainable due to the use of recycled fibers.