The first Polyurethane foams developped were based on Polyester resin. Today many technical applications require the unique properties of Polyester Polyurethane foams. The main advantages of polyester polyurethane foam are the freedom of formulation, the intrinsic flame lamination properties and the excellent cell size control. As a technical foam manufacturer, it is not a surprise that the vast majority of the foams currently manufactured at Caligen Europe is based on Polyester resin.