| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bottle container having a large buckling strength while an amount of a used synthetic resin material is reduced, and a manufacturing method thereof. SOLUTION: The biaxial drawing blow-molded light-weighted bottle container made of a synthetic resin has a wall, containing at least one cross section where a point of inflection at a joint between parts having different cross-sectional areas mainly on a cylindrical wall passes through, with a thickness of 109% or more for an average thickness of drawing-blown parts. The bottle container has joints between heels 14, 24 and 34 and bottoms 15, 25 and 35, waists 16 and 26, dented ribs 27, 37 and 39, and a protrusion 28 formed thick.</p> |
