FoamForge works with closed cell foam
Foam can be divided in to two fundamental types: closed or open cell (open cell typically used as a sponge or upholstery material).
Closed cell foams are composed of a matrix of independent, closed cells which are nonporous, stronger and more durable (typically used as a swimming float or bodyboard).
They are an expanded version of the original sheet polymer, with Foamforge most commonly using polyolefin foams: polyethelene (PE) and polyethelene vinyl acetate (EVA).
As thermoplastics, PE and EVA can be moulded using heat and pressure – this is thermoforming.