Patent ID: 6858106

Claim:
A method of manufacturing a web-shaped packaging laminate which comprises an innermost polyolefin layer, a barrier layer of an aluminum foil or an inorganic-oxide vapor deposition film, a polyolefin lamination layer, and a fibrous carrier layer, the method comprising: adhering or attaching a deoxidant of vitamin E, ascorbic acid or its derivative on an inner surface of the barrier layer which is web-shaped to produce a deoxidant-adhered/attached-barrier layer having a deoxidant-adhered/attached-inner surface, rolling round the deoxidant-adhered/attached-barrier-layer temporarily to a reel shape to directly contact the deoxidant-adhered/attached-inner surface and an external surface of the barrier layer for a predetermined time, pulling out the deoxidant-adhered/attached-barrier-layer from the reel shape, and laminating the barrier layer and the fibrous carrier layer by extrusion lamination of the polyolefin lamination layer between the external surface of the barrier layer and an inside of the fibrous carrier layer, and laminating the innermost polyolefin layer by extrusion lamination to an inside of the deoxidant-adhered/attached-barrier-layer simultaneously, before or after laminating the barrier layer and the fibrous carrier layer.