| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost double container that does not require a check valve for holding outer air, introduced between an inner layer body and an outer layer body, between the inner layer body and the outer layer body.SOLUTION: In the double container 1 having an inner layer body 4, an outer layer body 5 and an ejection cap 3 is provided an ejection passage 16 communicating a storage portion 4a of the inner layer body 4 with an ejection port 9 of the ejection cap 3; and are formed an inner plug 12 attached to an upper opening 4b of the inner layer body 4, a check valve 21b for opening/closing the ejection passage 16 and a sectioning wall 21a that is provided between the ejection cap 3 and the inner plug 12 and sections the inside of the ejection cap 3 into an ejection region 22 connecting the ejection region 16 to the ejection port 9 and aeration regions 32 and 33 outside the ejection region 22. A lower end portion of a cylindrical wall 7 covering the outer periphery of a mouth portion 5a of the ejection cap 3 is fitted to an outer peripheral surface of the outer layer body 5 to seal lower ends of the aeration regions 32 and 33. In the ejection cap 3 is formed an outer air introduction hole 31 that communicates the aeration regions 32 and 33 with outside, and a choking passage 35 is formed above the upper opening 4b in a route leading from the outer air introduction hole 31 through the aeration regions 32 and 33 to an opening hole 6. |
