Patent ID: 7598297

Claim:
A method of reclaiming a multilayered film waste, which includes plastic layers of polypropylene, polyethylene, and polyester layers, and an aluminum layer, comprising: a) feeding the pulverized multilayered film waste having the aluminum layer into a reactor to treat the pulverized multilayered film waste with a solution for dissolving aluminum so that the aluminum layer is selectively dissolved to be separated from the film; b) separating the pulverized film waste, from which the aluminum layer is separated through dissolution, into a layer of pulverized pieces including polypropylene and polyethylene, having low specific gravity, as main components, and a layer of pulverized pieces including polyester, having high specific gravity, as a main component, using a difference in the specific gravity; c) drying the pulverized pieces which are separated using the difference in the specific gravity and include polyester as the main component, adding the dried pulverized pieces into the reactor, and separating polypropylene and polyethylene therefrom through dissolution by heating the resulting pulverized pieces in conjunction with an organic solvent; and d) recovering an aluminum component, a mixture of polypropylene and polyethylene, and polyester from said separated materials.