EPS Production Process

The expandable polystyrene is produced by the suspension polymerization method of Styrene Monomer by batch process. The styrene, organic inhibitors, demineralised water and various additives are poured into the stirred reactors. Reactors are available in several sizes. The styrene droplets in suspension become polymerized and become Polystyrene. During the polymerisation reaction, the reactors are kept under constant control by heating from time to time and cooling from time to time. Then pentane is added as a blowing agent to absorb the particles. Thanks to the added auxiliary chemicals, the sizes and densities of the EPS granules are adjusted.

The reactor is evacuated and the particles are taken to the washing tanks and sent from there to the dryer. The water in the product is removed from the centrifugal dryer. The granules are removed from the dryer after drying. During this process they become a little more dried. The granules are then sent to the sieve to be separated according to their size. The granules separated according to the sieve sizes are transferred to silo separately. A chemical surface finisher is added to the silane granules to reduce friction during expansion processes prior to packaging. In the packaging and drying processes, static electricity reducing agents are added to the product. Thus the consumer who uses the product is not covered by the static problem. Throughout all the processes, the sample wakes up from the intermediate product and is tinted in the laboratory to make sure that the processes continue successfully.


Main Sectors in which EPS Hammaddesin is used;
In construction sector; (insulation panels, roof coverings, insulated trapeze sheet constructions, sound insulation, practical concrete forms, installation insulation, etc.) to which heat and sound insulation can be applied.

  • In the packaging sector, food containers, food packaging, heat-insulated cargo packages, impact resistance as a damper,

  • Due to the advantage of air transportation, due to its weight, in the production of pallets,

  • In the automotive sector, in buffer filling materials aiming to increase impact strength, in the construction of refrigerated vehicles due to its heat insulation feature

  • In the medical sector, in the construction of sterilized containers, can be listed as.