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Expanded PolyStyrene (EPS) is a white foam plastic material. It is produced from solid beads of polystyrene. It is used for packaging and construction. It is a closed-cell, rigid foam material produced from:
Styrene – which forms the cellular structure
Pentane – which is used as a blowing agent
Both styrene and pentane are hydrocarbon compounds. They are obtained from petroleum and natural gas byproducts.
EPS is 98% air and it is recyclable. It is a very lightweight material with the following benefits:
It has very low thermal conductivity, low moisture absorption, and excellent cushioning properties.
Its physical properties do not change within its service temperature range (i.e., up to 167°F/75°C) for long-term temperature exposure.
Its chemical resistance is nearly equivalent to the material upon which it is based – polystyrene.
One of the serious limitations of polystyrene foam is its low maximum operating temperature of ~80°C.
