Tray sealing

Sealing of trays, most often for food items, are becoming important technological requirement in recent years. The process involves either a PS (Polystyrene) tray sealed with food quality stretch film. Other process used in supermarkets or fast food vendors are for rigid trays (PVC or PET) which are sealed on top with barrier film. In some cases the atmosphere is modified in the tray in order to keep the product fresh and attractive looking.