Basf Se Corporation

Herbert Schall

Klaus Hahn

Dietrich Scherzer

Franz-Josef Dietzen

Eckhard Neufeld

Peter Merkel

Tim Diehlmann

Elena Khazova

Michael Gehde

Carsten Sandner

Maria-Kristin Sommer

Andreas DAIß

Alexander Gehr

Peter SCHÄFFNER

Roland Hingman

The present invention relates to a process for the production of at least two-layer thermoplastic foam sheets via thermal welding of at least two thinner thermoplastic foam sheets. In the process of the invention, at least two heating elements are conducted on mutually offset planes between the surfaces to be welded of the thinner thermoplastic foam sheets, and the foam sheets here do not touch the heating elements. The number of layers of the thermoplastic foam sheet is per se a result of the number of thinner thermoplastic foam sheets that are thermally welded to one another. If by way of example three thinner thermoplastic foam sheets are thermally welded to one another, a three-layer thermoplastic foam sheet is per se obtained, and if there are four thinner thermoplastic foam sheets the result is accordingly per se a four-layer thermoplastic foam sheet.

Method for producing thermoplastic foam panels by means of at least two heating elements offset in parallel with each other

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Römerberg, Germany

Herbert Schall