Patent ID: 7048822

Claim:
A polymer battery module packaging sheet manufacturing method comprising the steps of: processing at least one of a surface of an aluminum layer by chemical conversion treatment; dry-laminating a base layer to one of the surfaces of the aluminum layer; forming a laminated sheet by laminating a film consisting of an adhesive resin layer of an acid-modified polypropylene resin and an innermost layer of a polypropylene resin and formed by a coextrusion lamination method to the surface processed by the chemical conversion treatment of the aluminum layer so that the adhesive resin layer faces the aluminum layer, and then cooling the adhesive resin layer by passing the laminated sheet between a chill roll and a pressure roll; and heating the laminated sheet, which has been cooled by passing the laminated sheet between the chill roll and the pressure roll, so that the adhesive resin layer is heated at a temperature not lower than its softening point.