PUMP CONTAINER USING LAMINATED BOTTLE WITH PEELABLE INNER LAYER

摘要

The present invention aims it to provide a pumping container including a laminated bottle having a delaminatable layer, such that the container can be produced by less manufacture steps, and an inner layer portion serves as a valve for closing ventilation holes, thus dispensing with discrete valves, simplifying the structure and lowering manufacture cost. The laminated bottle of the present invention has the inner layer delaminated from an outer layer is formed on its inner surface. A ventilation hole formed in the outer layer allows ambient air to flow in between the outer and inner layers. The ventilation hole in the outer layer is temporarily closed with a closing portion of the inner layer from inside such that this closing portion will be deformed inwards due to atmospheric pressure so as to open the ventilation hole in response to a negative pressure appearing between the layers.