Method for the production of multilayer containers

US8414823B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Claus Rüdiger · Krefeld, DE
• Heinrich Hähnsen · Duisburg, DE
• Alexander Meyer · Mülheim an der Ruhr, DE
• Klaus Kraner · Solingen, DE

Key dates

• Filing date: Mar 6, 2008
• Grant date: Apr 9, 2013
• Expiry date: Mar 6, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1352
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention concerns a process for producing a container having at least one layer and a top layer, wherein the layer contains polycarbonate and the top layer contains polyarylethersulfone or polyarylsulfone, characterised in that a) polycarbonate is melted on an extruder at 230-320° C., b) polyarylethersulfone or polyarylsulfone is melted on a further extruder, c) the melts obtained from steps a) and b) are shaped by coextrusion into a tube, which is then enclosed in a mould, d) the extrudate is inflated inside the mould and pressed against the wall of the mould, forming the shape of the container, and e) the container obtained from d) is trimmed and cooled, such containers and the use of the containers as bottles or medical devices.