PBL tubes comprise 3 types of layers – polyethylene, bonding layer and ethylene vinyl alcohol (EVOH) film. The EVOH barrier layer protects against oxygen penetration from the environment and oil passing from the product into the other layers.
They are most commonly used for beauty and cosmetic products, because of the aesthetic look of the tube. PBL tubes are distinguished by their ability to hold their original shape. After squeezing, they return back to their original shape, which makes them a more stable packaging option.