Process and device for polyurethane foam production using carbon dioxide dissolssure

摘要

A process for the continuous production of slabstock foam by foaming a polyurethane reactive mixture containing carbon dioxide dissolved under pressure, wherein a) the reactive mixture is fed into a linear extended pressure distribution chamber at a pressure above that of the solubility vapour pressure of the dissolved carbon dioxide, b) the pressure is reduced to a pressure below that of the solubility vapour pressure of the dissolved carbon dioxide in a linear extended pressure reduction zone. c) the mixture is fed from the pressure reduction zone into a foaming chamber with a widening cross-section of flow and d) the foamed reactive mixture (froth) is applied substantially perpendicularly and free-flowing onto the conveyer belt of a continuous slabstock foam plant.