To provide a separation method of a laminated packaging material containing aluminum capable of recovering an aluminum layer and a resin layer by easily separating them in a reproduction process after the use of the laminated packaging material.
This is the separation method of the laminated packaging material including an aluminum layer, a polyolefin resin layer which contacts with the aluminum layer, and a paper layer. The method has: a step of exfoliating between the paper layer and the resin layer by immersing the laminated packaging material in an aqueous solution; a step of collecting the resin layer from which the paper layer is exfoliated and the aluminum layer from the aqueous solution; a step of exfoliating between the resin layer and the aluminum layer by immersing the collected resin layer and the aluminum layer in a fatty acid solution; and a step of separating the exfoliated aluminum layer and resin layer to collect them from the fatty acid solution.
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Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
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