| 摘要 |
<p>Provided is a preform in which the amount of resin can be further reduced. A preform (10) is constituted by a mouth portion (12), and a bottomed cylindrical preform main body (14) extending from the mouth portion (12), wherein the preform main body (14) is stretched by biaxial stretching blow molding, while the mouth portion (12) is not stretched, to form a plastic bottle. The preform main body (14) comprises a plurality of volume-reducing portions (50) formed at a uniform interval in the circumferential direction of the preform (10), at a boundary portion to the mouth portion (12) and a portion to be stretched by the biaxial stretching blow molding.</p> |
