What are Polystyrene Beads?

The curing of polystyrene beads is to expose the pre-expanded PS beads (that is, the pre-cured material) to the air for a period of time, so that the air gradually penetrates into the cells, the pressure inside and outside the cells reaches equilibrium, and the condensation foam The agent then penetrates into the particles. After the pre-foaming, the gas in the bubbles condenses due to cooling. At this time, the foaming agent that has condensed into a liquid is re-dissolved into the polystyrene, and a part of it will ooze outward. When the gas initially condenses, the bubbles There will be a large drop in pressure, so that a vacuum appears, so the pre-expanded particles are very fragile. ^[1]