The foam of polyurethane is produced by introducing gas into a liquid reaction of polyurethaneresulting in a cellular material. It is classified into rigid foamsused for thermal insulation, and flexible foamsused in furniture and automotive. The foam of polyurethane is light, thermally insulated and adaptable to complex shapes, and is essential in construction, packaging, and furniture. Its ability to be formed into various densities and stiffnesses allows it to be used in a wide range of applications, from comfort cushions to structural components in construction.