Polyurethane foam is used widely by manufacturing industries for packaging, noise reduction, vibration and shock absorption, water and air sealing or filtration. Herewith just a few examples:
Foam packaging material has excellent shock absorption properties. Moreover, the shape of the foam packing material can be entirely customised to precisely fit the item to be transported. That helps ensuring that fragile items can reach consumers undamaged.
It is widely understood that polyurethane foam can be used as an air, water or other fluid filter in industrial applications. This is possible thank to its cell structure, which can be adapted precisely to fit requirements.+
But few know that polyurethane foam is also essential for metal foundry filters. How can foam help filtering hot liquid metals? The foam serves as a "mould" in which ceramics are injected under pressure. Once solid, the combination of foam and ceramics is heated for the foam to burn. This process leaves a perfectly working ceramic filter with a cell structure for metal foundries. The same process is used to produce the "Nickel foams", used in batteries.