| 摘要 |
PURPOSE: To prevent the drawdown of an extrusion molded parison, to set that the parison is adjusted to temp. suitable for stretch blow molding to a technical subject and to adapt extrusion blow molding as a molding means of a bottle body made of a saturated polyester resin. CONSTITUTION: A parison 1 of a saturated polyester resin is forcibly cooled from the outer surface 2 thereof while subjected to extrusion molding to be adjusted to viscosity not generating drawdown and cooled to temp. developing stretching effect while the inner surface 3 thereof is held to a molten state and, in this state, cutting and stretch blow molding are achieved by a mold. |
