| 摘要 |
PROBLEM TO BE SOLVED: To prevent corrosion, deterioration and deformation of a mounting cap to be attached to an aerosol container, reduce the number of parts of the whole of a valve mechanism and simplify assembly steps.SOLUTION: A resistance layer 2f having a protective activity to the container contents (contents to be sprayed) is formed on e.g. an under-surface side of a mounting cap 2. The resistance layer 2f includes a protective resistance layer 2g on the lower-surface side of the mounting cap, an outer-side expansion resistance layer 2h in a sealed state between the bead part 1c, instead of a conventional annular seal member, and the layer 2h and an upper-side expansion resistance layer 2j which is expanded in such a way as to go round from the central opening 2b to the upper surface part 2d of the mounting cap, in order to inhibit gas inflow into the clearance between the lower surface of the mounting cap and the protective resistance layer 2g during charging of the gas for spraying. |
