| 摘要 |
The present invention is a synthetic resin bottle body formed by biaxial stretch blow molding, which addresses the problem of creating, in a bottle body which exhibits a decompression absorption function by means of the deformation of a recessed section of a bottom section, a bottom surface wall structure in such a way that the deformation of the bottom section that accompanies decompression is performed smoothly and the decompression absorption function can thereby be sufficiently exhibited. The synthetic resin bottle body comprises a recessed section (11) which is provided at the bottom surface of a bottom section (5) and deforms toward the inside of the bottle body (1) during decompression. The recessed section (11) is formed comprising: a ring-shaped concave section (15) which is continuously formed comprising a base end constituted by the inner circumferential end of a grounding section (16) provided around a circumferential edge section of the bottom section (5); a recessed concave section (12) which is provided at the center of the bottom section (5); and a ring-shaped flat section (13) which is provided between the inner circumferential end of the ring-shaped concave section (15) and the recessed concave section (12). Long narrow ribs (14) are provided at a plurality of locations on the ring-shaped flat section (13). |
