Polypropylene bottle moulded by stretch blow moulding and methods for the manufacture thereof

摘要

A polypropylene bottle (P) moulded by stretch blow molding, which is as transparent as polyvinyl chloride bottles, is produced by heating the inner surface (P1) of the parison by means of a heater body (1), before blow moulding, so as to smooth out a large number of fine striations due to stresses created when forming the parison. <IMAGE>