How do they make styrofoam?

Question

Is it plastic just cool off after being boiled?

Answer 1

Styrofoam ® is a Dow Chemical Co. trademarked form of polystyrene foam insulation, introduced in the U.S. in 1954. Styrofoam® is a trademarked name, the real name of the product is foamed polystyrene.
Ray McIntire invented Styrofoam for the Dow Chemical Co.. McIntire said his invention of foamed polystyrene was accidental. His invention came as he was trying to find a flexible electrical insulator around the time of World War II. Polystyrene, which already had been invented, was a good insulator but too brittle. McIntire tried to make a new rubber-like polymer by combining styrene with isobutylene, a volatile liquid, under pressure. The result was a foam polystyrene with bubble, 30 times lighter than regular polystyrene.
Styrofoam is recognize for its superior insulating properties, buoyancy and "unsinkability,

Answer 2

With styrofoam machines silly... But you know, I hear that the umpa loompas needed work after Charlie took over and lost the candy factory to crack gambling and hookers but I think that's just a rumor??

Seriously though...

Styrofoam is made by extruding polystyrene to achieve a closed cell foam that resists moisture. Recognizing its superior insulating properties, buoyancy and "unsinkability, it was originally adopted in 1942 by the Coast Guard for use in a six-man life raft.