Styrofoam: What is Styrofoam

What is Styrofoam? It’s more than just foam cups! Learn about EPS, XPS, and #4 Styrofoam, their differences, and whether they can be recycled. Styrofoam is created through a process of expanding small polystyrene beads by adding heat, which causes the material to puff up and form a solid, closed-cell foam structure. This structure gives Styrofoam its characteristic light weight, rigidity, and ability to insulate. Learn about the rich history of Styrofoam™ Brand extruded polystyrene (XPS) insulation – an innovative, sustainable building product that created an entire insulation material category since its invention in 1941. Discover how XPS’s unique closed-cell structure and rigid foam board technology now enable it to meet thermal, moisture, air and vapor performance requirements. And find out about DuPont’s recent reformulation process of Styrofoam™ Brand XPS Insulation, which offers a low ... Styrofoam is a light blue material used for building insulation and crafts, manufactured by DuPont. It is often confused with expanded polystyrene foam (EPS), which is more common in food containers and packaging.