PROCESS FOR PREPARING MULTIHARDNESS FOAM ARTICLES

摘要

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 (10) so that the side roll well (12) is inclined in a direction parallel to its length, introducing a liquid first foam formulation into the side roll well, and then introducing a liquid second foam formulation within a time interval corresponding to between 0.01 t to 1.5 t 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.