Production of blow-moulded biaxially-oriented packaging from polypropylene using two-stage technology

摘要

Until now, the most widely used method for production of blow-moulded packaging from polypropylene (PP) has been the single-stage extrusion blow-moulding process, which became the regular process for polymers such as PP, polyethylene (PE), polyvinyl chloride (PVC) and others. For prroduction of the packaging by this process, throughout the world there is a great variety of automatic and semiautomatic extrusion blow-moulding machines (called extruders), and technologies have been elaborated for making various types of packaging, including biaxially-oriented packaging-ranging from vials, ampoules, cups and bottles, to fuel cans and drums.