MANUFACTURE OF HEAT-RESISTANT SATURATED POLYESTER CONTAINER

摘要

PURPOSE:To provide a transparent container for hot filling whose neck part is excellent in heat resistance and prevented from becoming opaque by whitening to make the appearance of the whole of the container inharmonious by enhancing the degree of crystallization of the neck part required in heat resistance. CONSTITUTION:The part of a bottomed parison corresponding to the part becoming the neck part of a container after molding is preliminarily subjected to heat treatment before the molding of the container to release residual stress strain and, thereafter, usual molding processing is performed to make the whole of the container transparent inclusive of the neck part.