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Ray McIntire - Styrofoam Inventor
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يکشنبه 25 آذر 1397 زمان : 10:30

Ray McIntire - Styrofoam Inventor
Dow Chemical Company scientist Ray McIntire invented foamed polystyrene aka Styrofoam. McIntire said his invention of foamed polystyrene was purely accidental. His invention came about 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 a volatile liquid called isobutylene under pressure. The result was a foam polystyrene with bubble and was 30 times lighter than regular polystyrene. The Dow Chemical Company introduced Styrofoam products to the United State in 1954.
یونولیت
How Are Foamed Polystyrene or Styrofoam Products Made?
Foamed polystyrene starts as small spherical beads that contain an expanding agent called hydrocarbon.
The polystyrene beads are heated with steam. As the expanding agent boils, the beads soften and expand up to forty times their original size.
The expanded beads are left to cool down before being heated again. However, this time the beads are expanded within a mold.
The molds are designed in a variety of shapes depending on the desired end product. Examples are things such as styrofoam cups, cartons, wig stands and more.
The beads completely fill the mold and also fuse together.
Styrofoam is about 98% percent air.



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