| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin vessel capable of sufficiently exhibiting restoration performance coping with a shape change, even while enhancing reduced-pressure absorption performance under a requirement for thinning the vessel, in the square-bottled synthetic resin vessel whose corners are chamfered.SOLUTION: A flank 4 has chamfered parts 42 formed by chamfering side faces 41 and the corners, vertical groove-shaped ridge line grooves 43 are formed at ridge lines formed in boundaries along height directions of the side faces 41 and the chamfered parts 42, and vertical grooves 44 which extend in parallel with or substantially in parallel with the ridge line grooves 43 are formed at the chamfered parts 42. |
