PROCESS FOR PREPARING MULTIHARDNESS FOAM ARTICLES

摘要

PROCESS FOR PREPARING MULTIHARDNESS FOAM ARTICLES A multihardness foamed seat having side rolls comprising one or more zones of a second polyurethane foam encapsulated in a first polyurethane foam is prepared by arranging the seat mould so that the side roll well is inclined in a direction parallel to its length, introducing a liquid first foam formulation into the side roll well, and then intoducing a liquid second foam formualtion within a time interval corresponding to between 0.01t to 1.5t where t is the cream time of the first foam formulation. The process is particularly useful for the preparation of automobile seats having side rolls. C-38,804-F