Process and apparatus for reprocessing polyurethane foam wastes, in particular flexible foam wastes, for recycling as additives in the production of polyurethane

US5451376A · kind A · utility

Assignee

• Maschinenfabrik Hennecke GmbH · DE

Inventors

• Ferdinand Proksa · Leverkusen, DE
• Hans-Michael Sulzbach · Rübhausen, DE
• Ferdinand Althausen · Neunkirchen, DE
• Jurgen Wirth · Cologne, DE
• Reiner Raffel · Siegburg, DE

Key dates

• Filing date: May 3, 1994
• Grant date: Sep 19, 1995
• Expiry date: May 3, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In a fine comminution apparatus arranged downstream of a coarse comminution apparatus, polyurethane foam wastes can be comminuted to the desired particle size for recycling as an additive in the production of polyurethane, in a low-dust and energy-saving manner, by carrying out the fine comminution preferably by repeatedly forcing a mixture of the coarsely comminuted material and one of the reaction components through a nozzle or through a plurality of nozzles.