Shaped part for use as a construction material
AssigneeMarkus Rettenbacher
InventorMarkus Rettenbacher
Life of this patent
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Abstract
A shaped part is provided for use as a construction material, and includes at least one natural, fiber-containing biogenic material, and at least one biopolymeric natural binder. The binder is selected from the group consisting of starches, dextrins, pectins, collagens, proteins and caseins, and is present in the shaped part at a percentage of 5-85 wt. %. The fiber-containing material and binder are formed to define a dense outer surface and an interior core in which particles of the fiber-containing material are distributed within a structure-defining closed-cellular matrix.
Claims19
A shaped part for use as a construction, insulating or packaging material, comprising:
- a mixture of at least one natural, fibre-containing material and at least one biopolymeric natural binder capable of forming a gel-melt under conditions of extrusion,
- wherein particles of said fibre-containing material are distributed in a structure-defining porous matrix of said at least one binder and said matrix comprises pores or vesicles of an essentially closed-cellular nature obtained by spontaneous expansion and solidification of a gel-melt of said mixture formed under conditions of extrusion at elevated pressure together with elevated temperature or mechanical stress or both and subsequent relief of pressure, and
- wherein said shaped part further comprises 5 to 85 wt. % of said binder, 6 to 25 wt. % moisture and has an essentially pore-free surface.
A shaped part for use as a construction, insulating or packaging material, said part comprising:
- a mixture of at least one natural, fibre-containing material and as a natural binder at least one biopolymer capable of forming a gel-melt during extrusion at an elevated pressure of 15 to 600 bar together with an elevated temperature in excess of 100.degree. C. or mechanical stress or both,
- wherein particles of said fibre-containing material are distributed in a structure-defining porous matrix of said at least one binder and said matrix comprises porous or vesicles of an essentially closed-cellular nature obtained by spontaneous expansion and solidification of a gel-melt of said matrix formed during extrusion at said elevated pressure together with said elevated temperature or said mechanical stress or both and subsequent relief of said pressure, and
- wherein said shaped part further comprises 5 to 85 wt. % of said binder, 6 to 25% moisture and has an essentially pore-free surface.
Dependencies are inferred from the claim text.