Low melt flow index injection-stretch-blow molding resin melt flow resin.

摘要

The present invention discloses a method for preparing vials, preferably medical vials, by one-stage injection-stretch-blow-moulding with a random copolymer of propylene (RCP) having a melt index of from 1 to 3 dg/min, an ethylene content of less than 3.5 wt% with respect to the weight of the RCP and wherein the preform injection temperature is of at least 210 °C.