This is the process of producing polyurethane foam. Workers pour a mixture of two key chemicals — polyol and isocyanate — into a small mold or pool. When these react, they form polyurethane and release gas, causing the liquid to expand rapidly into foam, often growing 20 to 50 times larger than its original volume. After the foam fully expands and solidifies, it’s removed and cut into sheets of different thicknesses. These sheets are widely used as mattress filling, soundproofing, insulation, an