ã€Abstract】 A method for separation and recovery of aluminum-plastic paper composite packaging materials and its stripping agent, which mainly uses the acidic solution containing nitric acid to infiltrate the aluminum-plastic paper composite packaging material, and the joint of aluminum-plastic composite packaging materials. The aluminum oxide layer is separated and dissolved to achieve the separation of the plastic material layer or the paper material layer and the aluminum layer in the aluminum-plastic paper composite packaging material, so as to facilitate recycling of various useful materials such as aluminum foil, plastic or paper stock, etc. use.
Reproduced from: Chinalco