PROCESS FOR THE PREPARATION OF PUR FLEXIBLE FOAMS

摘要

The invention relates to a method for producing flexible moulded polyurethane foams (flexible moulded PU foams) with horizontally disposed zones of different hardness, the method being implemented in such a way that at least two fluid reaction mixtures, forming foams with different hardnesses, are introduced in succession in horizontal disposition, in layer form, into the moulding cavity, with at least one fluid reaction mixture being freely foamed, before at least one further foam-forming fluid reaction mixture is introduced into the moulding cavity.