Recycling Polystyrene. Plastic Forming.
Polystyrene is a thermoplastic found in many objects. There are several types mainly because its density is altered inserting gas inside. The less dense is EPS, expanded polystyrene, used in packaging because it absorbs shocks and is a good thermal insulator. Other type a bit less dense is extruded polystyrene, used in food trays and packages. It has less gas bubbles inside. More compact polystyrene can be found in yougurt and drinks cups. The most compact is crystal polystyrene found in CD and DVD boxes, transparent ballpens (bic), boxes, etc.