Processes for the manufacture of light-weight inorganic foam materials and articles produced thereby
OwnerRobin Crawford, John Douglasinventors
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Abstract
In a process for manufacturing foamed material, particles of a plant material as an organic expansion agent, particles of an inorganic base material and water are blended together. The blend is heated and pressurized to homogenize and liquefy or plasticize it. The blend is then extruded through a die where, in the course of the extrusion, superheated water in the blend vaporizes to foam the blend, the extrudate then being cooled and fired.
Claims18
A process for manufacturing foamed material comprising blending particles of a plant material as an organic expansion agent, particles of an inorganic base material and water to produce a blend, heating and pressurizing the blend to homogenize and liquefy it, extruding the blend through a die where, in the course of the extrusion, superheated water in the blend vaporizes to foam the blend, and cooling the extrudate.
A foam material manufactured by a process of blending particles of an organic plant material as an expansion agent, particles of an inorganic base material and water to produce a blend, heating and pressurizing the blend to homogenize and liquefy it, extruding the blend through a die where, in the course of the extrusion, superheated water in the blend vaporizes to foam the blend, and cooling the extrudate.
Dependencies are inferred from the claim text.