| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a plastic container which is high in buckling strength and drop strength, stackable, easily foldable and reducible in volume. SOLUTION: The integrated, rigid or substantially rigid synthetic resin container is provided with an easily foldable portion and a less easily foldable portion which reach a top wall 15 and a bottom wall 13 along the longitudinal direction of at least a body portion, and the less easily foldable portion is high in buckling strength, and foldable at the easily foldable portion. Various kinds of means can be applied to the configuration of the easily foldable portion and the less easily foldable portion, and the easily foldable portion and the less easily foldable portion are formed of a flexible resin layer 3 and a hard resin layer 2, respectively. Alternatively, the easily foldable portion is formed of a flexible resin single layer, and the less easily foldable portion is formed of a composite layer of the hard resin layer and the flexible resin layer, or the flexible foldable portion can be thick-walled while the less easily foldable portion can be thin-walled.</p> |
