Method for producing a printable single or multi-layered material web as well as a material web produced in this manner and an associated installation for producing such a material web

Abstract

The invention relates to an improved method for producing a printable single or multi-layered material web, characterised, inter alia, in that the following features are present: prior to printing, a primer layer is applied to the side of the material web that is provided for printing, this primer layer is applied in an excess amount to the printing side of the material web, excess primer material is stripped away by means of a doctor blade stripping element that is downstream of the material web in the removal direction or forward feed direction, for which purpose the plane of the removal doctor blade is adjustable in its alignment angle with regard to the plane of the material web and in its relative position and/or distance to the plane of the material web, and a primer material is used which has a flow time of between 10 and 30 seconds according to DIN norm 53211/4, and/or which has a solids fraction constituting between 30% and 60%.

1 . Method for producing a printable or printed single or multi-layer material web, which comprises at least one material web made of impregnated decorative paper, normal decorative paper, or at least one material web in the form of a plastics film, in particular for further combining with a base panel or a base element for furniture, floor, ceiling and/or wall application, having the following features:
 prior to printing, a primer layer comprising a primer material having a solids portion is applied to the side of the material web intended to be printed, wherein the following further features:   the primer layer is applied in an excess amount to the printing side of the material web,   excess primer material is scraped off by means of a doctor scraper which follows the material web in the removal direction or feed direction, for which purpose the angle of orientation of the plane of the removal doctor blade can be adjusted relative to the plane of the material web and the relative position of said plane of said removal doctor blade and/or the spacing thereof can be adjusted relative to the plane of the material web,   the removal doctor blade is positioned so as to have the doctor blade tip thereof between two rollers and/or two contact lines which are spaced apart and on which the material web is supported,   a primer material is used which has a runout time according to DIN standard 53211/4 of between 10 seconds and 30 seconds, and/or   a primer material is used which has a solids portion of between 20% and 70%.   
     
     
         2 . Method according to  claim 1 , wherein a primer material is used which consists of or comprises a water-based synthetic resin or acrylic resin dispersion. 
     
     
         3 . Method according to  claim 1 , wherein a primer material is used which has a pH value of between 5 and 9 or of between 6.5 and 8 or of approximately 7.5. 
     
     
         4 . Method according to  claim 1 , wherein a primer material is used which is completely soluble in water or is miscible with water. 
     
     
         5 . Method according to  claim 1 , wherein a primer material is used which has a flash point of over 100° C. 
     
     
         6 . Method according to  claim 1 , wherein a scraper doctor blade is used which has a doctor blade thickness of between 0.1 mm and 15 mm or has a thickness which is greater than or equal to 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm. 
     
     
         7 . Method according to  claim 1 , wherein a scraper doctor blade is used which has a doctor blade thickness of less than 12.5 mm, 10 mm, 7.5 mm, 5 mm or less than 2.5 mm. 
     
     
         8 . Method according to  claim 1 , wherein the scraper doctor blade which is used consists of stainless steel or plastics material or is coated with or encased in stainless steel. 
     
     
         9 . Method according to  claim 1 , wherein the scraper doctor blade, i.e. the plane of the scraper doctor blade, is adjusted at an angle to the runout side of the material web which is of between 25° and 75°, or of between 30° and 65°, 35° and 55° or of between 40° and 50° or of approximately 45°. 
     
     
         10 . Method according to  claim 1 , wherein decorative paper, pre-impregnates, film papers or thin films are used as the material web, the basis weight of which is of between 30 g/m 2  and 100 g/m 2 , or of between 40 g/m 2  and 90 g/m 2 , of between 50 g/m 2  and 80 g/m 2  or of between 60 g/m 2  and 70 g/m 2 . 
     
     
         11 . Method according to  claim 1 , wherein a material web is used which consists of or comprises pre-impregnated decorative paper which is saturated by means of resin solutions or plastics acrylate compounds or consists of or comprises sized paper. 
     
     
         12 . Method according to  claim 10 , that wherein the pre-impregnate is applied to the material web at an application amount which is of between 10 g/m 2  and 50 g/m 2  of the basis weight of the decorative paper used, the basis weight of the decorative paper used being between 30 g/m 2  and 100 g/m 2 . 
     
     
         13 . Method according to  claim 1 , wherein the material web coated with a primer material is printed using water-based printing inks or water-based intaglio inks. 
     
     
         14 . Method according to  claim 13 , wherein printing inks are used which have a solids portion of between 5% and 35%. 
     
     
         15 . Method according to  claim 12 , wherein printing inks are used which have a pH value of between 7 and 9 or of between 8 and 8.5. 
     
     
         16 . Method according to  claim 13 , wherein printing inks are used which have a flow rate of between 13 seconds and 30 seconds. 
     
     
         17 . Method according to  claim 13 , wherein printing inks are used in mixtures of which the flow rate is of between 15 seconds and 30 seconds. 
     
     
         18 . Method according to  claim 13 , wherein a bonding agent in the form of casein is used for the individual basic colours. 
     
     
         19 . Method according to  claim 13 , wherein printing inks are used which are blended with a bonding agent in the form of soya and/or casein. 
     
     
         20 . Printed material web produced according to  claim 13 . 
     
     
         21 . Printed material web according to  claim 20 , wherein the printed material web is applied, before or after printing, to a solid base material, in particular for producing furniture, floor and/or ceiling applications. 
     
     
         22 . Coating and/or printing press for producing a printable or printed single or multi-layer material web according to  claim 1 , having the following features:
 comprising a primer application device for applying a primer layer to a printing side of a material web,   comprising a doctor blade scraper which follows the primer application device in the removal or feed direction of the material web and is provided for scraping off excess primer material,   the angle of orientation of the plane of the removal doctor blade can be adjusted relative to the plane of the material web and thus the relative position and/or the spacing of said plane of said removal doctor blade relative to the plane of the material web can be adjusted, and   the removal doctor blade is positioned so as to have the doctor blade tip thereof between two rollers and/or two contact lines which are spaced apart and on which the material web is supported.