C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 25/14 (2006.01) B01D 39/20 (2006.01) C03B 37/04 (2006.01)
Patent
CA 2485630
The invention relates to a method of producing a filtering medium comprising a mineral fibre felt which is linked to a web. The inventive method consists of the following steps: fibres are formed using an internal centrifuging device comprising a fibre-forming spinner; a precursor of a binder is sprayed onto the fibres; the fibres are positioned on the web; and, subsequently, the assembly comprising the fibres and the web having a controlled thickness is heat treated such as to transform the binder precursor into a binder. The filtering medium thus obtained can be used to produce particularly effective bag filters.
L'invention concerne un procédé de fabrication d'un média filtrant comprenant un feutre de fibres minérales lié à un voile, comprenant les étapes suivantes - formation des fibres par un dispositif mettant en oeuvre le procédé dit de centrifugation interne comprenant une assiette de fibrage, puis - pulvérisation d'un précurseur d'un liant sur les fibres, puis - réception des fibres sur le voile, puis traitement thermique de l'ensemble comprenant les fibres et le voile selon une 20 épaisseur contrôlée de façon à transformer le précurseur de liant en liant. Le média-filtrant ainsi obtenu permet la réalisation de filtres à poche particulièrement efficaces.
Depuille Jean-Dominique
Maricourt Jean-Pierre
Morcrete Alice
Nousiainen Eerik
Pierucci Laurent
Goudreau Gage Dubuc
Saint-Gobain Isover
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