Dirt-repellent cleaning scraper

Abstract

A cleaning scraper for cleaning roller surfaces in paper machines, wherein the cleaning scraper has a main element and a coating covering at least part of the surface of the main element. The coating is formed with a first coating layer and a second coating layer arranged on the first coating layer. The second coating layer is formed by a polymer.

1 - 14 . (canceled) 
     
     
         15 . A cleaning scraper for cleaning roller surfaces in paper machines, the cleaning scraper comprising:
 a main element with a surface;   a coating covering at least a portion of said surface of said main element, said coating including a first coating layer and a second coating layer formed of a polymer disposed on said first coating layer.   
     
     
         16 . The cleaning scraper according to  claim 15 , wherein said polymer comprises an epoxy resin. 
     
     
         17 . The cleaning scraper according to  claim 15 , wherein said polymer comprises a silicone-polyester resin. 
     
     
         18 . The cleaning scraper according to  claim 15 , which comprises fillers embedded in said polymer. 
     
     
         19 . The cleaning scraper according to  claim 18 , wherein said fillers contain polyfluoroethylene. 
     
     
         20 . The cleaning scraper according to  claim 18 , wherein said fillers contain polytetrafluoroethylene. 
     
     
         21 . The cleaning scraper according to  claim 18 , wherein said fillers are present in the form of particles. 
     
     
         22 . The cleaning scraper according to  claim 21 , wherein said particles have average diameters in a range from 0.1 to 5 μm. 
     
     
         23 . The cleaning scraper according to  claim 15 , wherein said polymer comprises polyfluoroethylene. 
     
     
         24 . The cleaning scraper according to  claim 15 , wherein said polymer comprises polytetrafluoroethylene. 
     
     
         25 . The cleaning scraper according to  claim 15 , wherein said polymer comprises a silicone. 
     
     
         26 . The cleaning scraper according to  claim 15 , wherein a material of said first coating layer comprises hard metal. 
     
     
         27 . The cleaning scraper according to  claim 26 , wherein said hard metal contains 8 to 10% of cobalt and tungsten monocarbide. 
     
     
         28 . The cleaning scraper according to  claim 15 , wherein a material of said first coating layer comprises an oxide ceramic. 
     
     
         29 . The cleaning scraper according to  claim 28 , wherein said oxide ceramic is selected from the group consisting of aluminum oxide, zirconium oxide, magnesium oxide, chromium(III) oxide, yttrium oxide and the titanates. 
     
     
         30 . The cleaning scraper according to  claim 25 , wherein said first coating layer has a surface roughness in a range from 5 to 8 μm. 
     
     
         31 . The cleaning scraper according to  claim 30 , wherein said first coating layer has a surface roughness in a range from 6 to 7 μm. 
     
     
         32 . The cleaning scraper according to  claim 26 , wherein said first coating layer has a surface roughness in a range from 5 to 8 μm. 
     
     
         33 . The cleaning scraper according to  claim 32 , wherein said first coating layer has a surface roughness in a range from 6 to 7 μm. 
     
     
         34 . The cleaning scraper according to  claim 15 , which comprises a bonding layer formed on a surface region of said main element that adjoins said first coating layer.