Honeycomb composite support part and method for coating it

Abstract

A method for coating a cellulose honeycomb composite support part ( 1 ), which has a multiplicity of channels which extend in an axial direction, with an impregnating coating in order to increase the fire and/or water resistance and/or mechanical stability. The impregnating agent is fed into a vacuum coating chamber ( 8 ) and a complete and axially continuous coating is produced in the channels on their inner circumferential surfaces by deposition of impregnating agent on the inner circumferential surfaces of the channels, and excess impregnating agent ( 13 ) is extracted from the vacuum coating chamber ( 8 ). The resulting coating structure and a device for coating the composite support are also disclosed.

1 - 17 . (canceled) 
     
     
         18 . A method for coating a cellulose honeycomb composite support part ( 1 ) having a multiplicity of channels extending in an axial direction, with an impregnating coating in order to increase the fire and/or water resistance and/or mechanical stability, comprising the steps of:
 (a) feeding an impregnating agent into a vacuum coating chamber ( 8 ) to form a complete and axially continuous coating in the channels ( 5 ,  6 ) on all inner circumferential surfaces by deposition of impregnating agent on all of the inner circumferential surfaces of the channels; and   (b) extracting excess impregnating agent ( 13 ) from the vacuum coating chamber ( 8 ).   
     
     
         19 . The method according to  claim 18 , including feeding air into the vacuum coating chamber. 
     
     
         20 . The method according to  claim 18 , wherein an impregnating agent flow in the form of an air/impregnating agent mixture is produced in the vacuum coating chamber ( 8 ) by the channels ( 5 ,  6 ). 
     
     
         21 . The method according to  claim 18 , including spraying the impregnating agent ( 13 ) into the vacuum coating chamber ( 8 ) by means of at least one nozzle, wherein the impregnating agent is nebulised turbulently by means of air sucked and/or blown into the vacuum coating chamber ( 8 ), and the swirled impregnating agent ( 13 ) is deposited into the channels ( 5 ,  6 ). 
     
     
         22 . The method according to  claim 21 , wherein the excess impregnating agent ( 13 ) is extracted together with the intaken air. 
     
     
         23 . The method according to  claim 21 , wherein the air is taken into the vacuum coating chamber ( 8 ) via at least one gap ( 12 ) between a honeycomb composite support part ( 1 ) and vacuum coating chamber ( 8 ). 
     
     
         24 . The method according to  claim 23 , wherein the honeycomb composite support part ( 1 ) and vacuum coating chamber ( 8 ) are moved relative to one another perpendicularly to an axial extension of the channels ( 5 ,  6 ), wherein the honeycomb composite support part ( 1 ) is conveyed through the vacuum coating chamber ( 8 ). 
     
     
         25 . The method according to  claim 18 , wherein the impregnating agent ( 13 ) is selected from the group consisting of cement, waterglass, chalk, inorganic binder, and mixtures thereof. 
     
     
         26 . The method according to  claim 25 , including fixing a cover layer on at least one surface side of the honeycomb composite support part ( 1 ) to produce a sandwich component. 
     
     
         27 . A honeycomb composite support part ( 1 ) comprising a plurality of coated channels ( 5 ,  6 ) having an inner circumference coated with a complete and axially continuous impregnating coating. 
     
     
         28 . The honeycomb composite support part according to  claim 27 , wherein the honeycomb composite support part ( 1 ) comprises at least one carrier paper ( 3 ) and at least one corrugated paper ( 4 ) glued to the carrier paper ( 3 ), with a corrugated first surface side facing the carrier paper ( 3 ) to delimit first channels ( 5 ) each having a first inner circumferential surface and with a corrugated second surface side facing away from the first surface side to delimit second channels ( 6 ) each having a second inner circumferential surface, wherein the first inner circumferential surfaces of the first channels ( 5 ) and the second inner circumferential surfaces of the second channels ( 6 ) are coated with the impregnating coating to increase the fire and/or water resistance of the honeycomb composite support part. 
     
     
         29 . The honeycomb composite support part according to  claim 28 , wherein a first glue layer is provided between the first surface side of the corrugated paper ( 4 ) and the carrier paper ( 3 ), wherein this glue layer in a connecting region between the corrugated paper ( 4 ) and the carrier paper ( 3 ) directly adjoins the corrugated paper ( 4 ) and directly adjoins the first surface side of the carrier paper ( 3 ), and a second glue layer is provided between the second surface side of the corrugated paper ( 4 ) and the carrier paper ( 3 ), wherein the second glue layer in the connecting region between the corrugated paper ( 4 ) and the carrier paper ( 3 ) directly adjoins the corrugated paper ( 4 ) and directly adjoins the second surface side of the carrier paper ( 3 ). 
     
     
         30 . The honeycomb composite support part according to  claim 27 , wherein the honeycomb composite support part ( 1 ) is configured as an expanded honeycomb body. 
     
     
         31 . A coating device ( 7 ) for coating a honeycomb composite support part ( 1 ) having a plurality of channels extending in an axial direction with an impregnating coating to increase the fire and/or water resistance and/or the mechanical stability, the device ( 7 ) comprises a vacuum coating chamber ( 8 ) which has means for generating a vacuum and feed means comprising at least one nozzle for feeding impregnating agent ( 13 ) into a vacuum coating chamber ( 8 ) for depositing impregnating agent ( 13 ) on inner circumferential surfaces of the plurality of channels ( 5 ,  6 ) for producing a complete and axially continuous coating on the honeycomb support part. 
     
     
         32 . The device according to  claim 31 , wherein the vacuum coating chamber ( 8 ) has at least one gap-shaped opening for taking in air and/or the vacuum coating chamber ( 8 ) has blowing-in means for blowing in air. 
     
     
         33 . The device according to  claim 31 , including means for movement of the honeycomb composite support part ( 1 ) and the vacuum coating chamber ( 8 ) relative to one another.