SYNTHETIC RESIN BOTTLE

PROBLEM TO BE SOLVED: To provide a synthetic resin bottle reduced in material cost and deformation under a reduced pressure and further suppressing reduction in gas barrier property. SOLUTION: A bottom part 4 is constituted of a leg part 7 cooperatively arranged at the lower end of a body part 3 and a reversing part 8 which is extended in blow molding, reversed inside the body part 3 under application of an external force after a content is filled and a port part 2 is sealed, and formed into a recessed shape. The reversing part 8 is constituted of an annular first inclined panel 14, an annular second inclined panel 15 adjacent to the inside part of the first inclined panel, an outer peripheral hinge part 11 extending along an outer peripheral edge of the first inclined panel 14, an intermediate hinge part 13 extending along an interface between the first inclined panel 14 and the second inclined panel 15, and an inner peripheral hinge part 12 extending along the inner peripheral edge of the second inclined panel 15. Further, at least the inner surfaces from the body part 3 to the bottom part 4 are provided with a film having a gas barrier property. COPYRIGHT: (C)2009,JPO&INPIT