The film is guided on in web form after the material has cooled down again during blown film extrusion. A web guiding system is required to ensure that this works precisely and efficiently. Various BST inspection systems are also available to ensure the quality of the extrusion as well as the subsequent processing steps.
A web of material is sealed with plastic or synthetic resin during extrusion coating or lamination. This results in multi-layer materials with advanced properties, such as paper and cardboard, which can be used for beverage cartons. The material web must be precisely guided in order for the two layers to be permanently and accurately bonded.