Whether in air-freight or sea-cargo, transport company always face two issues: weight and reliability. For a shipping company to minimize transport costs and risks, they would tend to choose the most suitable equipments and methods.
From pallets, shipping box, to the filling within air-cargo walls, we could see plastic foaming been using popularly. It not only reduce total carrying weight, but also provide good reliability to the products during the shipment.
TFT/LCD Open Cell panels, panels can be stacked on top of each other. In this case the panels are generally packed in what are called Dense Pack boxes