Today, large containers, such as barrels, IBCs (Intermediate Bulk Containers), and storage tanks, are generally available as mono-layer containers. In this case, the container wall consists of one type of material which sometimes includes additives. These containers are often treated with fluorine gas to achieve the desired barrier properties. This treatment raises major concerns with regard to environmental protection as well as health and safety compliance.
A trend towards multi-layer wall structures is currently underway to achieve enhanced container properties. By combining various plastics with different properties, the qualities of the containers are perfectly adapted to the respective area of application.
Furthermore, uniform distribution of raw material across the entire container surface plays a significant role in assuring a cost-effective production, in particular when manufacturing large material-intensive containers.