Cover for beer can, includes internal accommodation for oxygen-absorbing agent embedded in polyethylene matrix covered by polyethylene terephthalate

摘要

The central zone (18) includes an opening for emptying the can (14). The surrounding zone (20) permanently connects the cover (12) to the can body (10). Oxygen-binding sodium sulfite or ascorbic acid is located on the inside (30) of the cover. The peripheral convolution (22) borders a central volume where this substance is accommodated. It is embedded in a polyethylene matrix covered by an oxygen-permeable layer of polyethylene terephthalate.