| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap wherein gas in a container can be efficiently permeated, generated gas can be easily discharged outside, and contents can further be protected from leakage. SOLUTION: The cap 10 is mounted on a tube nozzle 12 of a tube container 11 holding contents which may generate gas, and it seals a tip opening 20 of the nozzle 12 while the generated gas can permeate. The cap 10 comprises a cap body 15 including a fitting portion 13 into which the tube nozzle 12 is fit, an opening 17 formed through a top plate 16 of the fitting portion 13, and a plate member 18 made of a gas-permeable water-impervious material which is placed in tight contact over the top plate 16 while closing the opening 17 from the inside. A protective wall member 19 incorporating a vent hole 21 is integrally formed with the top plate 16, which covers the opening 17 formed through the top plate 16 of the fitting portion 13. |
