Vorrichtung und Verfahren zur Herstellung synthetischer Platten inklusive feuerbeständiger Platten

A method and apparatus for producing a synthetic board from cellulosic or lignocellulosic fibres is disclosed wherein a standard isocyanate binder is emulsified and immediately applied to the fibres before consolidation into a finished board product. The apparatus includes an emulsification and appl...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BAUER, TED J, MEDFORD, OR 97501, US, HARMON, DAVID M, PHOENIX, OR 97535, US, KIRWAN, RORY GERARD, CO WATERFORD, IE, TRELIVING, GORDON, NR CLONMEL, TIPPERARY, IE
Format:	Patent
Sprache:	ger
Schlagworte:	BUILDING CEILINGS FIXED CONSTRUCTIONS FLOORS GENERAL BUILDING CONSTRUCTIONS INSULATION OR OTHER PROTECTION OF BUILDINGS MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUTORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTINGOF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING NAILING OR STAPLING MACHINES IN GENERAL PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ROOFS TRANSPORTING WALLS, e.g. PARTITIONS WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL WORKING VENEER OR PLYWOOD
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Beschreibung
Zusammenfassung:	A method and apparatus for producing a synthetic board from cellulosic or lignocellulosic fibres is disclosed wherein a standard isocyanate binder is emulsified and immediately applied to the fibres before consolidation into a finished board product. The apparatus includes an emulsification and application nozzle comprising a diluent inlet, a binder inlet, a mixing section for emulsifying the diluent and the binder, and a spray nozzle for applying the binder/diluent emulsion to the fibres. The method includes supplying a binder stream, supplying a diluent stream, emulsifying the binder with the diluent and immediately applying the emulsion to the fibres. The method further includes flushing the binder/diluent emulsion using the diluent at the end of a binder application run to prevent curing of the emulsion and clogging of the apparatus. The present invention can be used to apply the binder/diluent emulsion to the fibres either in the blowline or downstream of the blowline, such as in the blender. The invention further includes a method and apparatus for producing fire-retardant boards in which a fire-retardant chemical such as an ammonium polyphosphate is applied to the fibres downstream of the refiner and upstream of the mat-former.