| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a biaxially drawn blow molded bottle having a bottom prevented from being deformed and sagged and from being unstable under the gravity and heat from a content even when the bottle is heated with a hot warmer or the like. <P>SOLUTION: The biaxially drawn blow molded bottle 1 has a recess 6 formed of a tapered peripheral wall 4 sloping toward the bottle interior of a bottom 3 and a top wall 5 continuous with the upper end of the peripheral wall. The tapered peripheral wall 4 is formed of a first peripheral wall 3b on the ground contact surface 17 side of a truncated regular polygonal cylindrical shape and a second peripheral wall 4a on the top wall 5 side which are continuous to each other and has a first bottom wall 3a and a second bottom wall 3c continuous to each other from the ground contact surface 17 to a barrel part 2 while the angles in the cross-section of the peripheral wall surface are different from each other. The first bottom wall 3a is an annular tapered bottom wall, and the second bottom wall 3c is an annular curved bottom wall. A plug part 91 is not whitened. The distance from the ground contact surface 17 of the recess 6 to the top wall 5 is 25-40% of the barrel diameter, and the annular ground contact diameter of the lower end of the recess 6 is 50-75% of the barrel diameter. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
