Rigid Foam

Rigid foams are derived from a variety of metallic and nonmetallic sources, of which polymeric foams are the most common because they are relatively easy to formulate and their processing is less energy intensive.
In the construction industry, polyurethane rigid foam is important to the structural integrity of both commercial and residential buildings. It provides a high level of insulation for walls, doors, and windows, and reduces noise as well.
The main applications of rigid biofoams are in abating noise and absorbing energy during a mechanical input. Rigid foams work with the basic principle of creating a network of closed cells through which density is reduced, as the bulk is replaced by air pockets.