| 摘要 |
PROBLEM TO BE SOLVED: To create a blow container which prevents the occurrence of bulging deformation and a bottom cracking phenomenon caused by an increase of internal pressure upon heating, and is excellent in an independent standing characteristic.SOLUTION: In a synthetic-resin-made blow container formed by direct blow molding from parison, a cylindrical tubular opening (2) is formed via a shoulder (3) to continuously rise from an upper end of a tubular body (4) of which the lower end is covered with a bottom (6). In the bottom (6), a center recessed part (8a) formed by denting a center of a bottom wall (8) inward like a dome is formed. In the center recessed part (8a), a vertical rib-like pinch-off part (9) extending along a parting line (PL) formed upon molding and a plurality of lateral ribs (10) extending to both directions perpendicularly from both lateral surfaces of the pinch-off part (9) are provided. The lateral ribs (10) extending in a first direction and the lateral ribs (10) extending in a second direction are configured to be alternately disposed. |
