RESIN STORAGE CONTAINER

摘要

The object of this invention is to provide a container having a reduced area of vacuum-absorbing panels and thus acquiring improved appearance and having strength against a pressure drop, i.e., the strength enough to retain the shape of the container even when there is a pressure drop inside the container. A shoulder portion or a bottom portion of a resin-made storage container is molded by aligning one or two groups of three corners and one or two groups of three pillars vertically and in parallel to the central axis of the container. Each group of three corners is a part of the corners forming a cross-section of a regular enneagon and being connected to either the shoulder portion or the bottom portion, and the lines connecting these three corners form a regular triangle. Each group of three pillars is a part of the pillars belonging to the body and forming a cross-section of a hexagon, and the lines connecting these three pillars form a regular triangle. If there is a pressure drop inside the container due to a decrease in the temperature of the contents, stress builds up inside the body of the container in such a way that the body deforms into a regular triangular prism, with vertically aligned corners/pillars serving as the three angles. As a result, the container has an enhanced level of strength against the force coming from any direction. With the shape stabilized, the container has also high resistance to buckling.