| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin bottle preform capable of producing a light-weight and thin resin bottle with high yield.SOLUTION: There is provided a resin molding bottle preform 1 comprising an open end 8 and a closed end 9, the resin molding bottle preform comprises: a neck part 2 for forming the open end 8; a tubular trunk part 3 connected to the neck part 2; a bottom part 4 for forming the closed end 9 and formed into an almost conical shape in which outer diameter becomes narrower as going toward the closed end 9; and a bent part 5 for connecting the trunk part 3 and the bottom part 4. Thickness of the bent part 5 in a direction orthogonal to a central axis AX of the trunk part 3 is almost equal. An apex which is the farthest point from a straight line connecting both ends of a curve which forms an outer surface of the bent part 5, and an apex of a curve which forms an inner surface of the bent part 5, are not arranged on a same straight line orthogonal to the central axis AX of the trunk part 3, in a cross section.SELECTED DRAWING: Figure 1 |
