| 摘要 |
<p>PURPOSE: To improve both an internal pressure-resistance against a content with a positive pressure, and an impact-resistance against a dropping etc. CONSTITUTION: This bottle made of a polyethylene terephthalate resin is equipped with a cylindrical body part 2, a bottom part 3 on which a gate trace 7 remains, and which is formed into a semispherical shape downward, and hollow leg parts 9 which are extended downward from the bottom part 3. Then, a non-drawn part 5 which has a concentric circular area from the center X of the bottom part 3, being 50% of the bottle maximum diameter or less, and is substantially under a non-drawn and non-crystal state in a range including the gate trace 7 is provided. Then, a protuberance-like part 10 which has a concentric circular area from the center X of the bottom part 3, being 8% or more and 20% or less of the bottle maximum diameter, and protrudes outward from the bottom part 3 in a range including the gate trace 7 is provided.</p> |
