| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method enabling a thin-walled polyester bottle having excellent heat resistance to be efficiently molded irrespective of a capacity of the bottle by a two-stage blow molding method.SOLUTION: A production method for a heat resistant polyester bottle is provided that is comprised of: a primary blow molding step of stretch blow molding a preform composed of an ethylene terephthalate-based polyester resin with a primary blow metallic mold; a heat shrinkage step of heating and shrinking a primary bottle obtained in the primary blow molding step; and a secondary blow molding step of stretch blow molding a secondary bottle obtained in the heat shrinkage step with a secondary blow metallic mold. In the production method, in the primary blow metallic mold in the primary blow molding step, a temperature in a portion corresponding to a heal portion of the bottom portion of the primary bottle is lower than a temperature in a portion corresponding to a body portion of the primary bottle and is adjusted to the range of 15-100°C.SELECTED DRAWING: Figure 2 |
