Patent ID: 8038928
Filing Date: 2011-10-18
Classification: B01D,Y10S

Abstract:
1. A method for producing a ceramic filter element of an exhaust gas filter for internal combustion engines, the method comprising: providing a combustible non-ceramic support web provided with flow channels; applying a combustible sealing bead such onto said combustible support web such that flow channels are closed alternatingly by said sealing bead; forming said support web into a desired geometric shape; immersing or pushing said shaped support web into a non-combustible ceramic plugging compound wherein at least a portion of said flow channels are closed off by said plugging compound; impregnating with a ceramic slurry said shaped combustible non-ceramic support web provided with said flow channels; subsequently firing said support web, formed in said desired geometric shape, until said support web is removed by combustion and a rigid ceramic filter body is produced; wherein said combustible sealing bead consisting of an adhesive that, in said firing step, combusts substantially without leaving residue in said ceramic filter body after said firing step, wherein said ceramic plugging compound remains after said firing, said plugging compound forming ceramic plugs closing said closed off flow channels of said ceramic filter body after said firing step.