| 摘要 |
<p>Method of molding a bottle-shaped container of orientation-molded polypropylene resin. To produce a bottle-shaped container of polypropylene resin having superior transparency, this method comprises the steps of rapidly heating the inside surface (P1) of a parison (P) molded in cylindrical shape with or without a bottom at higher than approx. 170 to 220 C which is the melting point of the polypropylene resin by a heat source (1), then quenching the parison (P) to thereby remove a number of fine ribs produced due to the strain at the inner surface of the parison (P), and then molding the parison (P) by the usual heat blow-molding process into a bottle-shaped container. </p> |
