Process and device for applying a liquid or pasty application medium on a traveling material web

Abstract

Process and apparatus for applying a liquid or pasty application medium on a traveling material web. The process comprises forming a material web in a wet end of a web production machine, and applying, via at least one application device in the wet end, at least one application medium on at least one side of the material web. The at least one application medium includes at least one organic material. The apparatus includes at least one application device located in a wet end of the web production machine, which is structured and arranged on at least one side of the material web, and at least one feeding pipe coupled to the at least one application device, which is structured and arranged for introducing at least one application medium includes at least one organic material.

What is claimed is:  
     
         1 . A process for applying a liquid or pasty application medium on a traveling material web comprising: 
 forming a material web in a wet end of a web production machine;    applying, via at least one application device in the wet end, at least one application medium on at least one side of the material web,    wherein the at least one application medium comprises at least one organic material.    
     
     
         2 . The process in accordance with  claim 1 , wherein the at least one application medium comprises at least one of a liquid and a pasty medium, and 
 wherein the at least one organic material improves at least one of surface quality and printability of the material web.    
     
     
         3 . The process in accordance with  claim 2 , wherein the at least one organic material improves both the surface quality and the printability of the material web.  
     
     
         4 . The process in accordance with  claim 1 , wherein the material web comprises at least one of a paper and a cardboard web.  
     
     
         5 . The process in accordance with  claim 1 , wherein the organic material comprises a suspension of at least one of cellulose and paper fibers.  
     
     
         6 . The process in accordance with  claim 5 , wherein each of the at least one of cellulose and paper fibers has a high refining degree.  
     
     
         7 . The process in accordance with  claim 6 , wherein the high refining degree of each of the at least one of cellulose and paper fibers is greater than or equal to about 50° SR.  
     
     
         8 . The process in accordance with  claim 7 , wherein the high refining degree is greater than or equal to about 70° SR.  
     
     
         9 . The process in accordance with  claim 7 , wherein the high refining degree is greater than or equal to about 85° SR.  
     
     
         10 . The process in accordance with  claim 1 , wherein the at least one application medium is applied in one of the former region and press region.  
     
     
         11 . The process in accordance with  claim 1 , wherein, prior to applying the at least one application medium on the material web, the process further comprises introducing at least one coating paint into the at least one application medium.  
     
     
         12 . The process in accordance with  claim 11 , wherein the at least one coating paint comprises at least one of starch, binder, pigment color, and size.  
     
     
         13 . The process in accordance with  claim 1 , wherein, subsequent to applying the at least one application medium on the material web, the process further comprises applying at least one coating paint via a second application device arranged, relative to a web travel direction, downstream from the at least one application device.  
     
     
         14 . The process in accordance with  claim 13 , wherein a time difference between applying the at least one application medium and applying the coating paint is within a region of about 1 ms-100 ms.  
     
     
         15 . The process in accordance with  claim 14 , wherein the time difference is within the region of about 20 ms-50 ms.  
     
     
         16 . The process in accordance with  claim 13 , wherein the coating paint comprises components of at least one of an offset ink and gravure ink.  
     
     
         17 . The process in accordance with  claim 13 , wherein the at least one coating paint comprises at least one of starch, binder, pigment color, and size.  
     
     
         18 . The process in accordance with  claim 1 , wherein the at least one application medium is applied on only one side of the material web.  
     
     
         19 . The process in accordance with  claim 1 , wherein the at least one application medium is applied on both sides of the material web.  
     
     
         20 . The process in accordance with  claim 1 , wherein the at least one application medium is applied at least one of directly and indirectly on the material web.  
     
     
         21 . The process in accordance with  claim 1 , wherein the at least one application medium is applied on the material web in a dosed manner.  
     
     
         22 . The process in accordance with  claim 1 , wherein the at least one application medium is applied over an entire width of the material web.  
     
     
         23 . The process in accordance with  claim 22 , wherein the at least one application medium is applied in a sectioned manner over the entire width of the material web.  
     
     
         24 . The process in accordance with  claim 1 , wherein the web comprises a multi-layered material web having two exterior layers formed by a multi-layer headbox and the at least one application medium is applied on at least one of the two exterior layers.  
     
     
         25 . An apparatus applying at least one application medium on a traveling material web in a web production machine, comprising: 
 at least one application device located in a wet end of the web production machine, which is structured and arranged on at least one side of the material web;    at least one feeding pipe coupled to said at least one application device, which is structured and arranged for introducing at least one application medium comprising at least one organic material.    
     
     
         26 . The apparatus in accordance with  claim 25 , wherein the at least one organic material improves at least one of surface quality and printability of the material web.  
     
     
         27 . The apparatus in accordance with  claim 26 , wherein the at least one organic material improves both the surface quality and the printability of the material web.  
     
     
         28 . The apparatus in accordance with  claim 25 , further comprising at least one other feeding pipe coupled to at least one of said at least one application device and said at least one feeding pipe, 
 said at least one other feeding pipe being structured and arranged for introducing at least one coating paint.    
     
     
         29 . The process in accordance with  claim 28 , wherein the at least one coating paint comprises at least one of starch, binder, pigment color, and size.  
     
     
         30 . The apparatus in accordance with  claim 25 , wherein the material web comprises at least one of a paper and cardboard web.  
     
     
         31 . The apparatus in accordance with  claim 25 , wherein the at least one application medium comprises at least one of a liquid and a pasty medium.  
     
     
         32 . The process in accordance with  claim 25 , wherein the organic material comprises pulp from wood grinding machines.  
     
     
         33 . An apparatus in a web production machine in which an application medium is applied on a traveling material web, comprising: 
 a primary application device located in a wet end of the machine that is positioned on at least one side of the material web;    at least one feeding pipe coupled to said primary application device, said at least one feeding pipe being structured and arranged for introducing at least one application medium comprising at least one organic material;    at least one secondary application device arranged, relative to a web run direction, downstream from said primary application device;    at least one secondary feeding pipe coupled to said at least one secondary application device, said at least one secondary feeding pipe being structured and arranged for introducing at least one coating paint.    
     
     
         34 . The apparatus in accordance with  claim 33 , wherein the at least one organic material improves at least one of surface quality and printability of the material web.  
     
     
         35 . The apparatus in accordance with  claim 34 , wherein the at least one organic material improves both the surface quality and the printability of the material web.  
     
     
         36 . The apparatus in accordance with  claim 33 , wherein the material web comprises at least one of a paper and cardboard web.  
     
     
         37 . The apparatus in accordance with  claim 33 , wherein the at least one application medium comprises at least one of a liquid and a pasty medium.  
     
     
         38 . The apparatus in accordance with  claim 33 , wherein said at least one application device is sectioned into at least two application sections, and 
 wherein each of said at least two application sections is separately at least one of adjustable and controllable with respect to an application amount.    
     
     
         39 . The apparatus in accordance with  claim 33 , wherein said at least one application device comprises at least one of an applicator, a spray jet, and a press roll.  
     
     
         40 . The apparatus in accordance with  claim 33 , wherein a pressure in said at least one application device is within a range of between about 0.05 bar-0.5 bar.  
     
     
         41 . The apparatus in accordance with  claim 40 , wherein the pressure is within the range of between about 0.1 bar-0.4 bar.  
     
     
         42 . The apparatus in accordance with  claim 33 , wherein, in a region of said at least one application device, a content of solid matter in the material web is between about 5%-60%.  
     
     
         43 . The apparatus in accordance with  claim 42 , wherein the content of solid matter in the material web is between about 8%-17%.  
     
     
         44 . The apparatus in accordance with  claim 42 , wherein a content of solid matter in the at least one application medium is between about 5%-50%.  
     
     
         45 . The apparatus in accordance with  claim 44 , wherein the content of solid matter in the at least one application medium is between about 10% and 30%.  
     
     
         46 . The apparatus in accordance with  claim 33 , wherein a total application weight of the at least one application medium for each material web surface is between about 1 g/m 2 -10 g/m 2  weight when dry.  
     
     
         47 . The apparatus in accordance with  claim 33 , wherein said wet end includes a headbox.  
     
     
         48 . The apparatus in accordance with  claim 47 , wherein said headbox comprises a multi-layer headbox.  
     
     
         49 . The apparatus in accordance with  claim 47 , wherein said headbox includes lamellas.  
     
     
         50 . The process in accordance with  claim 33 , wherein the organic material comprises pulp from wood grinding machines, and the at least one coating paint comprises at least one of starch, binder, pigment color, and size.