Extrusion Coating Die Eliminates Edge Bead, Enhances Coat Weight Uniformity

An advanced extrusion coating die designed to reduce edge bead has enabled Korea Aluminium Co. Ltd., a producer of aluminum foil and foil-laminate flexible packaging, to eliminate edge bead and reduce coat width variation by half or more, according to Nordson Corp. After a die for applying LDPE on an existing production line for flexible food packaging had been causing problems with die lines and leakage, Korea Aluminium recently replaced it with the Nordson Extrusion Dies Industries Edge Profile Control (EPC) die. The new die has not only eliminated the previous problems but has also made it possible to address the issue of edge bead and the waste of coating and substrate material that results from it, according to company officials.