Apparatus and method of manufacturing synthetic boards...

Details Apparatus and method of manufacturing synthetic boards... Apparatus and method of manufacturing synthetic boards...

B - Operations, Transporting

27

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B27N 3/06 (2006.01) B27K 3/04 (2006.01) B27K 3/06 (2006.01) B27K 3/10 (2006.01) B27K 3/20 (2006.01) B27N 1/02 (2006.01) B27N 3/04 (2006.01) B27N 3/10 (2006.01) B27N 3/12 (2006.01) B27N 3/26 (2006.01) C08K 3/32 (2006.01) C08K 5/17 (2006.01) C09K 21/04 (2006.01) D21J 1/00 (2006.01) D21J 1/08 (2006.01) D21J 1/16 (2006.01)

Patent

CA 2026470

APPARATUS AND METHOD OF MANUFACTURING SYNTHETIC BOARDS INCLUDING FIRE-RETARDANT BOARDS Abstract of the Disclosure A method and apparatus for producing a synthetic board from cellulosic or lignocellulosic fibers is disclosed wherein a standard isocyanate binder is emulsified and immediately applied to the fibers 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 fibers. The method includes supplying a binder stream, supplying a diluent stream, emulsifying the binder with the diluent and immediately applying the emulsion to the fibers. 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 binder/diluent emulsion can be applied to the fibers either in the blowline or downstream of the blowline, such as in the blender. A method and apparatus are also disclosed for producing fire-retardant boards in which a fire-retardant chemical, such as an ammonium polyphosphate, is applied to the fibers downstream of the refiner and upstream of the mat-former. Finally, a fire- retardant board product is disclosed that is made in accordance with the foregoing described methods and apparatuses.

MACHINE ET METHODE DE FABRICATION DE PANNEAUX AGGLOMERES, Y COMPRIS DE PANNEAUX IGNIFUGES Cette invention concerne une machine et une méthode de fabrication de panneaux agglomérés à partir de fibres cellulosiques ou lignocellulosiques où un liant d'isocyanate standard est émulsifié et appliqué immédiatement sur les fibres avant leur agglomération en produit fini. La machine comprend une buse d'émulsification et d'application comportant une arrivée de diluant, une arrivée de liant, une chambre de mélange servant à émulsifier le diluant et le liant, et un atomiseur d'émulsion liant/diluant pour l'imprégnation des fibres. La méthode comprend l'alimentation en liant et en diluant, l'émulsification du liant au moyen du diluant et l'application immédiate de l'émulsion sur les fibres. La méthode comprend en outre l'évacuation de l'émulsion diluant/liant résiduelle, sous jet de diluant en fin de cycle, pour éviter le séchage en place de l'émulsion et le colmatage des buses. L'émulsion peut être appliquée sur les fibres dans le tuyau de décharge ou en aval de celui-ci, notamment dans le mélangeur. Cette invention concerne également une méthode de production de panneaux ignifugés selon laquelle un produit chimique d'ignifugation, du polyphosphate d'ammonium par exemple, est appliqué sur les fibres entre le raffineur et la presse d'agglomération. Enfin, l'invention divulgue un panneau ignifugé fabriqué selon les méthodes et par les machines ci-dessus décrites.

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