FOERFARANDE FOER ISOLERING ELLER FODRING AV FOEREMAOL OCH ETT POLYURETANSKUM FOER ANVAENDNING VID DETTA FOERFARANDE

摘要

Manufacture of aritcles containing a cavity filled with rigid polyurethane foam by locating in the cavity or in the place which is to become the cavity a flexible polyurethane foam impregnated with isocyanate and protected against moisture and then removing the protectric barrier so that moisture gains access to the polyurethane foam and causes it to expand and cure to a rigid foam.