Antistatic flexible abrasive with a combined support

Abstract

A flexible antistatic abrasive with a combined support ( 10 ) consisting of a plastic film ( 13 ), on which binder resins ( 8 ) are applied, consisting of a “maker coat” ( 14 ), on which the abrasive ( 16 ) adheres, fixed by a “size coat” ( 15 ) and if necessary coated with a third binder ( 17 ), in which the plastic support film ( 13 ) is laminated with at least one reinforcement substratum or base support ( 12 ) and in which all the components of the combined support are treated with materials designed to provide the support with antistatic properties.

1 . A flexible and antistatic abrasive with a combined antistatic support ( 10 ) comprising a plastic film support ( 13 ) coated with binding resins ( 8 ), consisting of a first layer of binder conventionally known as a “maker coat” ( 14 ), with abrasive in granules ( 16 ) fixed by a second layer of binder conventionally known as a “size coat” ( 15 ) and, if necessary, coated with a third layer of binder (also known as “supersize coat”) ( 17 ), in which the plastic film support ( 13 ) is fixed by means of an appropriate antistatic adhesive to at least one antistatic reinforcement substratum of base support ( 12 ) in paper, in fabric, in fabric-non-fabric, in particular Velcro or similar, or in sponge, characterized in that, with the aim of providing the flexible abrasive with antistatic properties, the binding resins and the adhesives or glues of the combined support include carbon black and/or graphite and/or metal salts or similar (more in general substances that allow ion exchange), and in that the reinforcement substratum:
 a. if it is paper includes carbon black and/or graphite and/or metal salts, 
 b. if it is fabric or fabric-non-fabric consists of a compound able to form a reticulated polymer structure around the filaments; and c. if it is sponge the sponge is the ion exchange type. 
 
     
     
         2 . A flexible and antistatic abrasive ( 10 ) according to  claim 1 , characterized in that the combination between the plastic film support (II) and the substratum ( 12 ) in Velcro/paper/fabric/sponge is achieved by lamination preferably continuous by means of a plant ( 19 ) which allows the lamination process, comprising a reel ( 20 ) of flexible abrasive on plastic film ( 21 ) which is transferred to a lamination cylinder ( 22 ) positioned in contact with an additional lamination cylinder ( 23 ) which receives the sheet of support material ( 24 ) from a reel ( 25 ), and in that the lamination materials include glue from a container ( 26 ) where the laminated film which exits from the two cylinders ( 22 ,  23 ) is transferred to a drying oven ( 29 ) and then wound on a reel ( 30 ) 
     
     
         3 . A procedure for the continuous production of a flexible and antistatic abrasive according to  claim 1 , characterized in that it comprises a first step for combination of the antistatic adhesive and on-line lamination of a plastic film support and a reinforcement support, a second step of distribution of a first resin on the film, a third step of scattering of abrasive granules on the first resin, a fourth step of catalysis of the first resin in an oven in order to fix the abrasive granules on the resin, a fifth step of distribution of a second resin in order to coat the abrasive granules, a sixth step of catalysis in an oven to fix the second resin, and a seventh step to wind the flexible and antistatic abrasive material around an appropriate roller. 
     
     
         4 . A procedure for the continuous production of a flexible and antistatic abrasive according to  claim 1 , characterized in that it comprises a first step for distribution of a first resin on the plastic film unwound from a roller, a second step of scattering of abrasive granules on the first resin, a third step of catalysis of the first resin in an oven in order to fix the abrasive granules on the resin, a fourth step of distribution of a second resin in order to coat the abrasive granules, a fifth step of catalysis in an oven to fix the second resin a sixth step of combination of the (antistatic) adhesive and on-line lamination of the plastic film comprising the abrasive granules with a reinforcement support, and a seventh step to wind the flexible and antistatic abrasive material around an appropriate roller. 
     
     
         5 . A procedure for the continuous production of a flexible and antistatic abrasive according to  claim 2 , characterized in that it comprises a first step for combination of the antistatic adhesive and on-line lamination of a plastic film support and a reinforcement support, a second step of distribution of a first resin on the film, a third step of scattering of abrasive granules on the first resin, a fourth step of catalysis of the first resin in an oven in order to fix the abrasive granules on the resin, a fifth step of distribution of a second resin in order to coat the abrasive granules, a sixth step of catalysis in an oven to fix the second resin, and a seventh step to wind the flexible and antistatic abrasive material around an appropriate roller. 
     
     
         6 . A procedure for the continuous production of a flexible and antistatic abrasive according to  claim 2 , characterized in that it comprises a first step for distribution of a first resin on the plastic film unwound from a roller, a second step of scattering of abrasive granules on the first resin, a third step of catalysis of the first resin in an oven in order to fix the abrasive granules on the resin, a fourth step of distribution of a second resin in order to coat the abrasive granules, a fifth step of catalysis in an oven to fix the second resin a sixth step of combination of the (antistatic) adhesive and on-line lamination of the plastic film comprising the abrasive granules with a reinforcement support, and a seventh step to wind the flexible and antistatic abrasive material around an appropriate roller.