Polystyrene - foamed and crystal

Polystyrene and the styrene-butadience plastics

have widely been used in food packaging industry for many years. They are particualrly transformed into trays and containers.
The polymers themselves can come into direct contact with foods since they are compliant with the relevant EU directives on plastics which can contact food.

There are actually two types of polystyrene trays which are based on two plastics.
Crystal polystyrene is used because of its transparency mainly in confectionairy.
On the other hand, we have foamed polystyrene which is thermoformed into various kinds of trays. Foamed polystyrene trays act as containers for eggs, fast-foods, poultry, fish, fruit and vegetables. Sometimes foamed polystyrene is laminated with EVOH to adjust the containers to modified atmosphere packaging (barrier foam trays).

One of the companies offering products made of polystyrene is ampac.
www.ampac.info