Patent ID: 6780269
Filing Date: 2004-08-24
Classification: B32B,Y10T

Abstract:
A method of manufacturing a packaging material laminate of web form comprising at least a printing ink outer layer, an aluminum vapor deposition film layer containing linear low density polyethylene obtained by a polymerization using metallocene catalyst, a polyethylene-extrusion lamination layer, and a carrier layer of paper or paper substitution material, according to following steps:a step of vapor-depositing aluminum on one side of the web form film containing the linear low density polyethylene obtained by the polymerization using the metallocene catalyst, a step of winding up temporarily the aluminium vapor deposition film containing the linear low density polyethylene obtained by the polymerization using the metallocene catalyst in a reel form, making direct contact between the aluminium vapor deposition surface and the film surface containing the linear low density polyethylene, and keeping the reel for a predetermined time, a step of unwinding the aluminium vapor deposition film from the kept reel, applying a fused lamination resin by extrusion lamination by fused polyethylene between the vapor deposition surface of an aluminium vapor deposition film layer and the surface of the carrier layer, and laminating the aluminium vapor deposition film layer and the carrier layer and, a step of forming an ink layer on the external surface of the outside of the laminate by printing, wherein said printing step is perform simultaneously, before or after the above-mentioned steps.