Process for foam production using carbon dioxide dissolved under pressure

US6019919A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• HENNECKE GMBH · DE

Inventors

• Hans-Michael Sulzbach · Rübhausen, DE
• Ferdinand Althausen · Neunkirchen, DE
• Reiner Raffel · Siegburg, DE
• Robert Eiben · Lampertheim, DE
• Wilfried Ebeling · Neunburg vorm Wald, DE

Key dates

• Filing date: Jul 3, 1997
• Grant date: Feb 1, 2000
• Expiry date: Jul 3, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/77
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process and device for the continuous production of slabstock foam by foaming a polyurethane reactive mixture containing carbon dioxide dissolved under pressure, comprising the steps of PA1 a) feeding said polyurethane reactive mixture into a linear extended pressure distribution chamber at a pressure above that of the solubility vapor pressure of said dissolved carbon dioxide, PA1 b) reducing pressure to a pressure below said solubility vapor pressure of said dissolved carbon dioxide in a linear extended pressure reduction zone, PA1 c) feeding said polyurethane reactive mixture from said pressure reduction zone into a foaming chamber with a widening cross-section of flow to form a foamed reactive mixture, and PA1 d) applying said foamed reactive mixture (froth) substantially perpendicularly and free-flowing onto a conveyer belt of a continuous slabstock foam plant.