Resin storage container

Abstract

In a resin storage container, a transverse sectional shape of a shoulder part or a bottom part is formed in a regular nonagon. A part of corners of the shoulder part or the bottom part at three parts forming a regular triangle by the lines to connect the corners to each other, and a part of corners of a body part with the transverse sectional shape being formed in a hexagon at three parts forminga regular triangle formed by lines to connect the corners to each other are vertically arranged in one row parallel to the center line of the container. When the pressure in the container is dropped by the temperature drop of contents or the like, the stresses are exerted inside the body portion of the container in the direction in which the body portion is deformed in the regular triangular prism shape with the corners vertically arranged in one row as being an apex. Then, the strength of the container is increased against the force from any direction, the shape of the container becomes stable, and the resistance against buckling is high.

Description

technical field [0001] The present invention relates to a resin storage container, and more particularly, to a resin storage container having high resistance to pressure drop inside the container and high shape retention. Background technique [0002] In a cylindrical resin container such as a PET bottle for storing drinking water, etc., in the past, a decompression absorbing plate or the like was provided on the side of the container. etc., the decompression absorbing plate is displaced to the inside of the container, and the entire container is prevented from being deformed by the decompression inside the container. [0003] On the other hand, in recent years, from the standpoint of container design, it has been desired to reduce the area of ​​the above-mentioned pressure-reduction absorbing plate. [0004] In addition, there is also known an example in which the decompression absorbing portion is formed in a direction inclined with respect to the central axis of the cont...

AI Technical Summary

Problems solved by technology

[0007] If the container is deformed in this way, not only the appearance of the container will be significantly reduced, but also the strength will be reduced in the part where the thickness has been thinned after the deformation into an ellipse, and longitudinal bending will occur, which will cause problems in terms of strength and container use.

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