Swell-Peeling Method for Paints on Aluminum Cans

摘要

Used aluminum beverage cans (UBC) are able to be recycled into can body material (JIS3004) by remelting. However, in these remelting processes, such problems attributed to "paints" occur as unfavorable molten metal composition (primarily titanium) and lowering of molten metal yield. Consequently, for promoting recycling of aluminum UBC, removal of these "paints" is essential, and the paints have been removed by thermal method etc. Previous paper reputed the development of a swell-peeling method in which paints are chemically removed, ensuring the good possibility of promoting recycling of aluminum UBC. This paper reports the details of swell-peeling mechanism.