SQUARE CUP-SHAPED PLASTIC CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a square cup-shaped plastic container improving the flowability of a molten resin in a cavity during its injection molding operation and showing a quite excellent beautiful appearance or stored content protection.

SOLUTION: In this square cup-shaped plastic container having a circumferential wall 110 and a bottom plate 130 having a rectangular shape in its horizontal section so as to weld a sealing sheet to an outer circumference of the opening at the upper end of the circumferential wall in such a way that it can be peeled off, protrusions 121 for improving the flow of a molten resin are radially formed from the center position of the upper surface of the bottom plate toward the corner of each of the circumferential walls with an interval of about 20°.

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