Method for producing a coloured mineral wool product comprising the same colour coating

Abstract

The invention relates to a method for producing a mineral fibre board which comprises a coloured pigment and whose at least one surface is provided with a non-woven coating made of a substantially black material. The inventive method consists in inserting the coating into a board production device, wherein said coating is embodied in the form of a fabric, which is based on a polyester with appropriate weight per unit square, not precoloured and not impregnated or provided with an additional adhesive agent introduced therein for adhering to fibre pads. A coloured mineral wool product provided with the same colour coating produced by the inventive method is also disclosed.

1 . A method for producing a mineral wool product, such as glass wool, said wool being dyed and comprising a coating of the same color, in which the mineral wool is gathered to form a fiber pad on conveyor means after spraying by a binder curable under the effect of heat and after blending with colored pigments, then introduced into a crosslinking chamber, said method being characterized in that the coating is a polyester fabric and in that said polyester fabric is contacted with the pad before introduction into the chamber, without the addition of dye and without impregnation or introduction of additional adhesive for its adhesion to the fiber pad. 
   
   
       2 . The production method as claimed in  claim 1 , in which the conveyor means are permeable to gases and are mounted on means for aspirating said gases. 
   
   
       3 . The production method as claimed in either of  claims 1  and  2 , in which the polyester fabric is introduced on the conveyor means before placing the fibers on said conveyor means. 
   
   
       4 . The production method as claimed in either of  claims 1  and  2 , in which the polyester fabric is introduced above or below the fiber pad, immediately before the introduction of said pad into the crosslinking chamber. 
   
   
       5 . The production method as claimed in one of the preceding claims, in which the basis weight of the polyester fabric is between 10 and 50 g/m 2 , preferably between 15 and 30 g/m 2 , and highly preferably between 15 and 20 g/m 2 . 
   
   
       6 . The production method as claimed in one of the preceding claims, in which the pigment used is suitable for dyeing the pad and fabric black, for example, made from carbon particles. 
   
   
       7 . The production method as claimed in one of the preceding claims, in which the quantity of binder is between 1 and 10 wt % of the fiber mass, preferably between 2 and 8 wt % and highly preferably between 4 and 7 wt %. 
   
   
       8 . The production method as claimed in one of the preceding claims, in which the quantity of pigment introduced corresponds to a weight percentage of said pigment in the dry extract of between 0.1 and 5% of the fiber mass, preferably between 0.5 and 1.5% of the fiber mass. 
   
   
       9 . The production method as claimed in one of  claims 2  to  8 , in which the suction capacity and/or the quantity of pigments and/or the quantity of binder are selected so that at least 50% of the surface of the polyester fabric on the finished product has a substantially identical color to the glass fiber pad constituting the core of the material. 
   
   
       10 . A colored mineral wool product comprising a coating of the same color, such as a rolled surfaced board, obtainable by a method as claimed in one of the preceding claims.