| 摘要 |
PURPOSE: To provide a can cap not detached from a beverage can by gas such as carbon dioxide or fermentation gas generated in the can even when the drinking port of the unfinished beverage can containing carbon dioxide or fermentation gas of Coca-Cola or beer is closed. CONSTITUTION: In a can cap wherein the cap main body 3 bonded and fitted to the outer peripheral edge 2 of the drinking port of a can l under pressure to close the drinking port is molded from a flexible resin and an opening part 6 is formed at the position coinciding with the drinking port of the can l of the upper surface of the cap main body and the lid member fitted to the opening part 6 in a freely detachable manner, a small hole 11 having a predetermined diameter communicating with the opening part 6 provided to the inside of the lid member 7 is formed to the lid member 7. A porous material 12 having air permeability is provided to the inner surface of the lid member 7 to close the small hole 11 from the inside of the lid member 7. |
