Process for removing volatiles evolved from plastic melts

US4233429A · kind A · utility

Assignee

• BASF SE

Inventors

• Werner Hoerauf · Ludwigshafen, DE
• Guenter Valentin · Ludwigshafen, DE
• Robert Kegel · Bischofswerda, DE
• Helmut Kuhn · Weißenbrunn, DE

Key dates

• Filing date: Jul 25, 1978
• Grant date: Nov 11, 1980
• Expiry date: Jul 25, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/03
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for removing volatile constituents which are evolved from plastic melts when extruding the latter and are drawn off together with the surrounding air. The volatile constituents are drawn off immediately as they are evolved by the plastic melt and the air containing such volatile constituents is heated immediately after entering the suction orifice, and an apparatus for carrying out this process.