In the technical area, cardboard cores are used where special protective functions, such as coverings during the coating of car parts or transport protection, are required. In addition, cardboard cores are used as mounting support for antifriction-bearings, as group rings and insulating cores in telecommunications, as functional parts for various filters, and as protective cores for electric motors. One major advantage with these and other cardboard core applications is the low-priced option of adjusting the cores to meet specific customer requirements.