| 摘要 |
<p>1. A method of producing moulded polyurethane foam upholstery comprising several juxtaposed and/or superimposed zones of different flexibility, characterised in that it involves dividing a mould (1) by arranging therein one or more receivers (2) and/or one or more separators (3) made of expanded polystyrene, simultaneously pouring different foaming mixtures of polyurethane each of different flexibility into one of the volumes defined by the walls of the separators (3) and of the mould (1) and/or by the walls of the receivers (2), covering the mould (1), subjecting the mould (1), filled with polyurethane foams, to the temperature originating from an external heat source and/or from the exothermic reaction of the foams, in order not only to polymerise the polyurethane foams but also to shrink the expanded polystyrene, this shrinkage at temperature (T) determining the transformation of said expanded polystyrene into a layer (6) of flexible material serving to interconnect the polyurethane foams of different flexibilities which had been poured simultaneously.</p> |
