Re: Popcorn RP

From: Michael Hirschmann (
Date: Tue Feb 01 2000 - 01:11:50 EET

Thanks, I enjoyed that. There is a well established technology that is
currently used for the production of expanded poly styrene parts (Styrofoam)
that mimics popcorn. Pellets of styrene are impregnated with a propellant
(pentane), and are then expanded by heating (usually with steam). Shape is
determined by constraining the pellets in a mold, causing fusing at the
expanded cell borders of the hot plastic. Wonder where that might go for
fabbing large Styrofoam parts?

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