vaahtomateriaalista
Vaahtomateriaali, often translated as foam material, is a substance that contains a large volume of gas dispersed within a solid or liquid matrix. This structure gives it unique properties such as low density, good insulation, and cushioning capabilities. Foams can be broadly categorized based on their cell structure. Open-cell foams have interconnected cells, allowing fluids and air to pass through them. Examples include sponges and many types of upholstery foam. Closed-cell foams, on the other hand, have sealed cells that trap gas, making them excellent insulators and often providing buoyancy. Rigid foams like expanded polystyrene (EPS) and extruded polystyrene (XPS), commonly used in construction and packaging, are typically closed-cell.
The production of foam materials involves various processes. Polymerization, blowing agents, and mechanical agitation are common