| 摘要 |
PROBLEM TO BE SOLVED: To provide a container of double structure which is easy to release an internal container from a mold, easy to insert the internal container into an external container without using any tool, and capable of increasing the filling ratio of the content to be stored. SOLUTION: In a container, a valve housing is fitted to an external container, a blow-molded internal container 4 is connected to the valve housing, and the section of the blow-molded internal container 4 is provided with a bellows wall surface 21 which is formed perpendicular or draft-tapered relative to each orthogonal direction around the parting line 20. After the internal container 4 is blow-molded, uni-directional releasing from the mold is possible, and the internal container 4 can be easily inserted into the external container if the bellows wall surface 21 is narrowed, and the filling ratio of the content to be stored in the internal container 4 can be kept high by expanding the bellows wall surface 21 after insertion. |
