Fremgangsmåde til fremstilling af hætteglas ud fra harpikser med lavt smelteindeks ved sprøjtestrækblæsestøbning

摘要

The present invention discloses a method for preparing vials, preferably medical vials by two-stage injection-stretch-blow-moulding with a random copolymer of propylene having a melt index MI2 of from 1 to 3 dg/min and an ethylene content of from 2 to 3.5 wt% based on the weight of the resin, and wherein the preform injection temperature is of at least 280 °C.