Antistatic flexible abrasive with a combined support

Abstract

A flexible antistatic abrasive with a combined support consisting of a plastic film, on which binder resins are applied, consisting of a “maker coat”, on which the abrasive adheres, fixed by a “size coat” and if necessary coated with a third binder, in which the plastic support film is laminated with at least one reinforcement substratum or base support and in which all the components of the combined support are treated with materials designed to provide the support with antistatic properties. Other aspects are disclosed and claimed.

What is claimed is: 
     
         1 . A method for manufacturing a flexible and antistatic abrasive in tape form, comprising:
 providing an antistatic plastic film support in tape form wound on a first reel, wherein said antistatic plastic film support is coated with both:
 a first binder resin layer or maker coat; and 
 abrasive granules fixed on said first binder resin layer by a second binder resin layer or size coat, 
   whereby both the first layer of resin or maker coat and the second layer of resin or size coat contain carbon black, graphite, metal salts or other antistatic agents, whereby said antistatic plastic film support;   providing an adhesive or glue containing carbon black, graphite, metal salts or similar antistatic agents;   providing a base support in tape form and wound on a second reel, said base support being comprised of a material selected from the group consisting of paper or fabric containing carbon black, graphite, metal salts or other antistatic agents;   unwinding the plastic film support from said first reel and transferring it to a first lamination cylinder;   unwinding the base support from said second reel and transferring it to a second lamination cylinder that is in contact with said first lamination cylinder;   pouring said adhesive or glue in the contact area of said first and second lamination cylinders during rotation of said first and second lamination cylinders;   whereby a laminated film in tape form is formed, said laminated film being constituted by a plastic film comprising an abrasive and a base support made of paper or fabric; and   transferring said laminated film to a drying oven, whereby the transferred laminated film is wound a third reel.   
     
     
         2 . The method of  claim 1 , wherein said plastic film support is coated with a third layer or supersize coat of resin containing carbon black, graphite, metal salts or other antistatic agents an antistatic surface. 
     
     
         3 . The method of  claim 1 , wherein said plastic film support is a polyester film comprising antistatic properties. 
     
     
         4 . The method of  claim 1 , said adhesive or glue comprises vinyl or polyurethane. 
     
     
         5 . A method for manufacturing a flexible and antistatic abrasive in tape form, comprising:
 providing a plastic film support in tape form and wound on a first reel;   providing an adhesive or glue containing carbon black, graphite, metal salts or similar antistatic agents;   providing a base support in tape form and wound on a second reel, said base support being either made of paper or fabric containing carbon black, graphite, metal salts or similar antistatic agents;   unwinding the plastic film support from said first reel and transferring it to a first lamination cylinder;   unwinding the base support from said second reel and transferring it to a second lamination cylinder that is in contact with said first lamination cylinder;   pouring said adhesive or glue in the contact area of said first and second lamination cylinders during rotation of said cylinders;   whereby a laminated film in tape form is formed, said laminated film being constituted by a plastic film comprising an abrasive and a base support made of paper or fabric;   wherein said laminated film in tape form is further moved to a first working station in which a first binder or “maker coat” is deposited on the plastic side of said laminated film;   wherein said laminated film in tape form is further moved to a second working station in which abrasive in grains is deposited on said first binder while said first binder is still wet;   wherein said laminated film in tape form is further moved to a first oven where said first binder is dried and cured, thereby blocking said grains;   wherein said laminated film in tape form is further moved to a third working station in which a second binder or “size coat” is deposited on the film;   wherein said laminated film in tape form is further moved to a second oven where said second binder is dried and cured, thereby covering the abrasive grains; and   whereby said laminated film in tape form is further moved to a third reel, upon which it is wound.   
     
     
         6 . The method of  claim 5 , wherein said first and second binders are selected from the group consisting of animal glue, ureic glue, phenolic glue, and epoxy glue. 
     
     
         7 . The method of  claim 5 , wherein the working temperature of said first and second ovens comprises a range between 40° C. and 130° C. 
     
     
         8 . The method of  claim 5 , wherein said abrasive grains are composed of a substance selected from a group consisting of at least one of aluminum oxide, silicon carbide, zirconium, ceramic, diamond, titanium carbide, and titanium oxides. 
     
     
         9 . The method of  claim 5 , wherein said first and second binders are deposited on the plastic side of said laminated film. 
     
     
         10 . A method for manufacturing a flexible and antistatic abrasive in tape form, comprising:
 providing a plastic film support in tape form and wound on a first reel;   providing an adhesive or glue containing carbon black, graphite, metal salts or similar antistatic agents;   providing a base support in tape form and wound on a second reel, said base support being either made of paper or fabric containing carbon black, graphite, metal salts or similar antistatic agents;   unwinding said plastic film support from said first reel and transferring it to a first working station in which a first binder or “maker coat” is deposited on a side of said plastic film;   wherein said plastic film in tape form is further moved to a second working station in which abrasive in grains is deposited on said first binder while said first binder is still wet;   wherein said plastic film in tape form is further moved to a first oven where said first binder is dried and cured, thereby blocking said grains;   wherein said plastic film in tape form is further moved to a third working station in which a second binder or “size coat” is deposited on the film;   wherein said plastic film in tape form is further moved to a second oven where said second binder is dried and cured, thereby covering the abrasive grains;   whereby said plastic film in tape form is further moved to a first lamination cylinder;   unwinding the base support from said second reel and transferring it to a second lamination cylinder that is in contact with said first lamination cylinder,   pouring said adhesive or glue in the contact area of said first and second lamination cylinders during rotation of said cylinders, and   whereby a laminated film in tape form is formed, said laminated film being constituted by a plastic film comprising an abrasive and a base support made of paper or fabric.   
     
     
         11 . The method of  claim 10 , wherein said first and second binders are composed of a substance selected from the group consisting of animal glue, ureic glue, phenolic glue, and epoxy glue. 
     
     
         12 . The method of  claim 10 , wherein the working temperature of said first and second ovens ranges bet comprises a range between 40° C. and 130° C. 
     
     
         13 . The method of  claim 10 , wherein said abrasive grains are composed of a substance selected from a group consisting of at least one of aluminum oxide, silicon carbide, zirconium, ceramic, diamond, titanium carbide, and titanium oxides. 
     
     
         14 . The method of  claim 10 , wherein said first and second binders are deposited on the plastic side of said laminated film.