WELDING PACKAGING CONTAINERS

摘要

The welding of laminates and lacquered metals is described for the purpose of producing tubular can bodies for three piece cans. The method describes how a coating-free margin is produced on can blanks in order to be able to produce satisfactory welds. A pulsed laser having a short pulse duration of less than 10 mu s and a peak power output of at least 0.1 megawatt is used to clean margins from can blanks of polymer/tinplate laminates which were then welded. A weld latitude of at least 200A was possible for forming can bodies with fully acceptable welds from laminates of tinplate and clear or white polypropylene or white PET, for example.