Process and device for producing foam using carbon dioxide dissolved under pressure

US6147133A · kind A · utility

Assignees

• HENNECKE GMBH · DE
• BAYER HEALTHCARE LLC · 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: Nov 19, 1998
• Grant date: Nov 14, 2000
• Expiry date: Nov 19, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29B7/7414
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process and a device are described for the continuous production of block foam by the foaming of a mixture which reacts to form polyurethane and which contains carbon dioxide dissolved under pressure, wherein the pressure of the reactive mixture is reduced on passing through a pressure reduction zone in the form of an aperture, and blockage of the aperture is prevented by the relative movement of the aperture-delimiting faces with respect to each other.