Patent ID: 7338573
Filing Date: 2008-03-04
Classification: B32B,G09F,H01F,Y10T

Abstract:
1. The method of forming a multi-layer magnetic assembly in-line, said multi-layer magnetic assembly consisting of a magnetic layer, an adhesion promoting layer, and a printable substrate layer, said method comprising the steps of: a) providing a hot melt magnetic composition, said hot melt magnetic composition comprising comprises about 80 wt-% to about 95 wt-% of at least one magnetic material and about 5 wt-% to about 20 wt-% of at least one thermoplastic material at an elevated temperature with an extruder; b) providing a printable substrate layer; c) providing an adhesion promoting layer on said printable substrate layer; and d) applying said hot melt magnetic composition at an elevated temperature directly to said printable substrate layer with a first slot die application head to form a magnetic layer having a thickness of about 50 microns to about 305 microns on said printable substrate layer, the adhesion promoting layer between said printable substrate layer and said magnetic layer.