METHOD FOR PRODUCING A PANEL FROM SECONDARY RAW MATERIALS, PANEL FORMED FROM SECONDARY RAW MATERIALS, AND PANEL FORMED FROM SECONDARY RAW MATERIALS PRODUCED BY THIS METHOD

The invention relates to a method for producing a panel (20) from secondary raw materials, in particular from a ground material consisting of comminuted and ground polyurethane foam residues and optionally further solid auxiliaries. To perform the method, a mixture of ground material, isocyanate, wa...

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Bibliographische Detailangaben
1. Verfasser:	SCHMID, Oliver
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for producing a panel (20) from secondary raw materials, in particular from a ground material consisting of comminuted and ground polyurethane foam residues and optionally further solid auxiliaries. To perform the method, a mixture of ground material, isocyanate, water and optionally further liquid or pourable additives is pressed under high pressure and elevated temperature to form a panel. The mixture is continuously fed here in the form of a bulk material, uniformly distributed in width and thickness, to a press nip of a double-belt press (10) formed of endless belts running in parallel. As it passes through the double-belt press (10) the fed bulk material is subjected to a defined pressure perpendicular to the parallel endless belts and to an elevated temperature so as to form a hot endless panel at the discharge from the double-belt press (10). To protect the metallic surfaces of the endless belts from sticking, a separation layer is introduced during the pressing process of the double-belt press (10) between the metallic surfaces of the endless belts and the bulk material.