| 摘要 |
PROBLEM TO BE SOLVED: To provide a bottle which is molded by direct blow molding and is usable for high-temperature filling, i.e., a heat-resistant blow bottle.SOLUTION: A bottle molded by direct blow molding has an open tubular neck part raised on the upper end of a cylindrical body part via a tapered cylindrical shoulder part which is diameterically enlarged downward. A part from the upper end of the shoulder part to the lower end of the body part is formed into a cylindrical shape which includes a plurality of panel walls arrayed in a peripheral direction and has a flat cross-section of polygonal shape. Each panel wall is helically inclined with respect to the axis of the bottle at the shoulder part, and extended along the axis in a vertical direction at the body part. A short cylindrical part connected to the bottom part is disposed at the lower end of the body part. A peripheral groove rib is disposed in the short cylindrical part. The depth of the peripheral groove rib is set to be equal to or more than 4% of the diameter of the short cylindrical part, more preferably within the range of 4.3% to 6%. |
