| 摘要 |
There is proposed a method for easily manufacturing a plastic bottle the longitudinal dimension (height) of which is decreased substantially when the bottle is manufactured, as compared with the time when the bottle is filled with contents. The method includes a step of molding of the bottle constructed so that a longitudinal part or the whole of the bottle, except a mouth portion at the upper end, has a bellows shape in the horizontal direction; a step of compression molding of the bottle so that the molded bottle is compressed in the longitudinal direction and the compressed state is kept at ordinary temperature; and a step of expanding of the bottle so that the bottle is expanded from the compressed state so as to have almost the same height (volume) as the original height.
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