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AssigneeBeamech Group Limited
InventorsJames B. Blackwell, Geoffrey Buckley, John J. Blackwell, Stephen W. Blackwell
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A process and apparatus for producing polyurethane foam, comprising bringing together under pressure one or more foam components and a gaseous CO2 auxiliary blowing agent and discharging the combination through a permeable discharge head in the form of plural individual wire meshes sintered together to form at least one composite element having a structure such as to require repeated division, divergence and convergence of flow paths and impingement of the individual flows with the sintered wire mesh and the flows through adjacent pores in three dimensions within its axial thickness, and at which the pressure is reduced for forming a froth, wherein the combination of the foam components and gaseous CO2 is arranged to be in a non-homogeneous state containing gas bubbles prior to passage through the discharge head.
A process for producing polyurethane foam, comprising bringing together under pressure one or more reactive foam components and a gaseous non-reactive auxiliary blowing agent to form a combination and discharging the combination through a permeable discharge head in the form of plural individual wire meshes sintered together to form at least one composite element which repeatedly mixes the combination as it passes therethrough, and reduces the pressure causing the combination to form a froth which cures into a foamed mass.
Dependencies are inferred from the claim text.