Preparation of coated abrasive disk

Abstract

A coated abrasive disk having an improved dimensional stability and high breaking strength is prepared by combining a supporting substrate and a coated abrasive body comprised of a backsheet and a layer of a coated abrasive material thereon.

1 . A method for preparing a coated abrasive disk which comprises preparing a disk form of a supporting substrate; preparing a disk form of a coated abrasive body comprised of a backsheet and a layer of an abrasive material thereon; and combining the supporting substrate and the coated abrasive body such that the backsheet of the coated abrasive body is bonded to the substrate by using an adhesive.  
     
     
         2 . The method of  claim 1 , wherein the coated abrasive body is prepared by coating a first adhesive mixture on the backsheet, spreading an abrasive material thereon, drying the first adhesive layer having the abrasive material dispersed therein, coating a second adhesive mixture thereon and drying the second adhesive layer.  
     
     
         3 . The method of  claim 1 , wherein the backsheet is a processed material selected from the group consisting of polyester textile, cotton textile, polyester/cotton mixed textile, polyester/nylon mixed textile, polyester film (PET film) and cylinder paper.  
     
     
         4 . The method of  claim 1 , wherein the abrasive material is selected from the group consisting of alumina (Al 2 O 3 ), silicon carbide (SiC), alumina zirconia (AZ), ceramics, diamond, CBN (cubic boron nitrile) and a mixture thereof.  
     
     
         5 . The method of  claim 1 , wherein the adhesive is selected from the group consisting of epoxy resin, polyurethane resin, synthetic rubber, degenerated heat-curable resin and a mixture thereof.  
     
     
         6 . The method of  claim 1 , wherein the supporting substrate is selected from the group consisting of an engineering plastic, bakelite plate, and a laminate of a nonwoven fabric and at least one textile selected from the group consisting of glass fiber, carbon fiber, polyester and nylon textile.  
     
     
         7 . The method of  claim 6 , wherein the laminate of a nonwoven fabric and at least one textile is prepared by placing a disk form of said at least one textile on a disk form of the nonwoven fabric and applying a pressure of 5 to 7 kgf/cm 2  thereto at a temperature ranging from 120 to 170° C.  
     
     
         8 . The method of  claim 6 , wherein the textile is made of fibers impregnation-treated with a phenol resin, an acrylonitrile-butadiene-rubber latex or a mixture thereof.  
     
     
         9 . The method of  claim 6 , wherein the textile is a laminate of carbon and glass fiber textiles prepared by stacking at least one carbon fiber textile and at least one glass fiber textile in order.  
     
     
         10 . A coated abrasive disk which is prepared by the method of  claim 1.