| 摘要 |
<p>A preform (1) having a main preform body (2) which has a cylinder shape extending in the axial direction, and two mouth parts (3, 4) formed on both longitudinal sides of the main preform body (2), the main preform body (2) being biaxially stretched and molded into a liquid transportation container (40) by blow molding. When the wall thickness of the substantially center portion (11), in the axial direction, of the main preform body (2) is represented by t1 and the wall thicknesses of both axial end parts (10, 12) of the main preform body (2) are represented by t2 and t3, respectively, the relationships 1.5 < (t1/t2) < 2.5 and 1.2 < (t1/t3) < 3.0 are satisfied, and the wall thickness between the center portion (11) and both end portions (10, 12) gradually decreases toward the end portion (10, 12). A liquid transportation container (40) having an extremely uniform wall thickness is thereby obtained.</p> |
