Introduction to PET Packaging Belt Melt Screen Changer PET packaging belt dual column screen changer is a commonly used, continuous, and highly recognized non-stop screen changer, suitable for the production of products such as boards, sheets, films, pipes, wire drawing, optical fibers, cables, etc. Working principle of Hot-melt adhesive double column large filter cartridge screen changer When changing the PET packaging with a dual column screen changer, one screen works and the other screen is