Expanded polystyrene is a rigid closed cell/cellular plastic resin made from petrochemicals derived from crude oil. The resin
is incorporated with the blowing agent pentane. During the pre-expansion, steam softens the plastic resin causing
the pentane to expand the plastic into beads at least 100 times their original size.
As long as the plastic is exposed to steam, the longer the pentane expands, therefore the determining the
expanded size of the bead. Before all of the pentane is displaced by air, the pre-expanded bead is then
placed into a mold of any shape or block.
Blocks are then cut to desired size with hot wires, wrapped, and shipped.
Other EPS Facts:
EPS does NOT contain CFC's, HCFC's, or formaldhyde.
EPS does NOT contribute to the growth of mold or mildew.
EPS is considered to be no more toxic than Douglas Fir wood under the worst case fire scenario.
EPS is manufactured in accordance with ASTM C578.
EPS is recyclable.
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