| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin vessel capable of sufficiently exhibiting restoration performance or the like coping with a shape change, while enhancing the reduced-pressure absorption performance of the vessel as a whole, without impairing moldability under a requirement for thinning the vessel.SOLUTION: A step 33 extending in a horizontal direction is formed at an upper part of a reduced-pressure absorption panel 45a, a bend guide 34 is formed substantially in the center of the step, ridge line grooves 43 are formed at ridge lines in boundaries along height directions of side surface 41 and chamfered parts 42, vertical grooves 44 are formed at the chamfered parts 42 of an upper flank 4a, protruded ribs 43a are formed in the ridge line grooves 43 of a lower flank 4b, a recess is formed in a position along at least one of a boundary between a flank 4 and a shoulder 3, a boundary between the upper flank 4a and a waist 40, a boundary between the lower flank 4b and the waist 40, and a boundary between the flank 4 and a bottom 5, and grooves 55 are formed at sides 53 of legs 52 formed at the four corners of the bottom 5. |
