Separating method for recycling foil-laminated material

摘要

A separating method for recycling foil-laminated material basically uses an acid solution containing nitric acid as a stripping agent to soak foil-laminated material. The stripping agent permeates into the foil-laminated material to dissolve alumina at interfaces to separate a foil layer and a plastic layer or a paper layer. Whereby, useful materials of the foil layer, the plastic layer, and the paper layer in the foil-laminated material are separated completely for a subsequent recycling process.