| 摘要 |
PROBLEM TO BE SOLVED: To provide a double container capable of suppressing the stagnation of granular matters in a content fluid between a non-return valve and an inner plug, thereby suppressing the intrusion of outside air into a filling space and the dripping of the content fluid from a dispensing part during the release of squeeze.SOLUTION: A double container 10 comprises: a fluid flow path 43 provided on a top wall 41 covering an upper opening 31 and connected to a filling space S; an inner plug 40 for defining a circulation space Nof a content fluid between the fluid flow path 43 and a dispensing part 74 in cooperation with a dispensing plug 70; and a content fluid non-return valve 50 disposed inside the circulation space N. The content fluid non-return valve 50 is provided with: an opening/closing wall part 52 which moves to the dispensing part 74 side by inverting the double container 10, allows the content fluid from the fluid flow path 43 to pass through by the application of pressure to the filling space S due to the pressure on an outer layer body 20, and comes into contact with the top wall 41 while moving to the fluid flow path 43 side by inverting the double container 10, and in which a penetration part 53 preventing the passage of outside air from the dispensing part 74 is formed; and a sliding cylindrical part 51 connected to the opening/closing wall part 52 and guided slidably inside the circulation space N. |
