| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a double storage structure which has a flow path having a film-formed non-return valve action and formed in an inside area of a fluid filling material package.SOLUTION: A double storage structure consists of a pouring nozzle cap 20 having a pouring nozzle 21 protruded upward or in the lateral direction from a cap body 25 and, in the lower part, an insertion nozzle fused and joined with a fluid filling material package 30 and a squeeze cover, and a level difference part 23, the fluid filling material package formed by forming fusion flap parts 32 in the upper end part and side surface end parts of front and back soft film sheets punched in a specified shape and superimposed, fusing and joining the fusion flap parts 32 into a bag shape and providing a nozzle insertion port 35 at the center of the upper part and the squeeze cover body provided by forming a hard film sheet having flexibility and shape restoration properties into a specified shape and forming the fusion flap parts in the upper end part and the side surface end parts of the resultant body. The insertion nozzle 22 of the pouring nozzle cap is inserted into the nozzle insertion port of the fluid filling material package and fused and joined.</p> |
