Coated Abrasive Disk Comprising A Loop Fabric Layer and Preparation Thereof

Abstract

A coated abrasive disk including (1) a loop fabric layer having a plurality of projected filament loops on one side thereof, (2) a carbon fiber textile layer or a glass fiber paper layer in a pre-dried state after impregnation-treatment with an adhesive resin, and (3) a coated abrasive material, which are sequentially stacked and tightly combined together, has an improved elasticity and high cutting performance characteristics.

1 . A coated abrasive disk which comprises:
 (1) a loop fabric layer having a plurality of projected filament loops on one side thereof;   (2) a carbon fiber textile layer or a glass fiber paper layer bonded to the surface opposite to the surface having loops, the carbon fiber textile or glass fiber paper being in a pre-dried state after impregnation-treatment with an adhesive resin; and   (3) a coated abrasive material comprised of a backsheet bonded to the carbon fiber textile layer or glass fiber paper layer, and a layer of an abrasive material coated thereon.   
   
   
       2 . The coated abrasive disk of  claim 1 , wherein the loop fabric layer is made of a nylon, polyester textile or polyester/nylon mixed textile. 
   
   
       3 . The coated abrasive disk of  claim 1 , wherein the loop fabric layer has a specific weight of 70 to 120 g/m 2 . 
   
   
       4 . The coated abrasive disk of  claim 1 , wherein the filament loop side of the loop fabric layer has a reticular pattern generated by flattened loops. 
   
   
       5 . The coated abrasive disk of  claim 1 , wherein the carbon fiber textile is impregnation-treated with 180 to 300 g/m 2  of an adhesive resin and then pre-dried at a temperature ranging from 100 to 140° C. 
   
   
       6 . The coated abrasive disk of  claim 1 , wherein the carbon fiber textile has a satin, leno or plain fabric pattern of 52˜70×24˜30 s/yarn (warp×fill) and a thickness of 0.1 to 0.32 mm. 
   
   
       7 . The coated abrasive disk of  claim 1 , wherein the glass fiber paper is made of a mixture of 70 to 90% by weight of glass fibers and 10 to 30% by weight of wood fibers. 
   
   
       8 . The coated abrasive disk of  claim 1 , wherein the glass fiber paper before impregnation-treatment with the resin has a specific weight of 45 to 80 g/m 2  and a thickness of 0.25 to 0.65 mm. 
   
   
       9 . The coated abrasive disk of  claim 1 , wherein the glass fiber paper is impregnation-treated with 90 to 200 g/m 2  of an adhesive resin and then pre-dried at a temperature ranging from 80 to 100° C. 
   
   
       10 . The coated abrasive disk of  claim 5 , wherein the adhesive resin is selected from the group consisting of a phenol resin, epoxy resin, urea melamine, polyester resin, polyvinyl butyral, acrylonitrile-butadiene-rubber latex, degenerated heat-curable resin and a mixture thereof. 
   
   
       11 . A method for preparing the coated abrasive disk of  claim 1  which comprises placing disk forms of a coated abrasive material comprised of a backsheet and a layer of an abrasive material thereon, a carbon fiber textile or glass fiber paper, and a loop fabric in order such that the backsheet of the coated abrasive material faces the carbon fiber textile or glass fiber paper, the carbon fiber textile or glass fiber paper being in a dried state after impregnation-treatment with an adhesive resin, followed by applying heat and pressure to obtain a tightly combined stack of the coated abrasive material, carbon fiber textile or glass fiber paper, and loop fabric. 
   
   
       12 . The method of  claim 11 , wherein the heat and pressure applied to the stack are in the ranges of 120 to 170° C. and 5 to 7 kgf/cm 2 , respectively. 
   
   
       13 . The method of  claim 11 , wherein a reticular glass fiber textile plastic plate or a plain fabric pattern of a glass fiber textile plastic plate coated with a Teflon resin is placed on the projected filament loops of the loop fabric during the heat-pressing process. 
   
   
       14 . The coated abrasive disk of  claim 9 , wherein the adhesive resin is selected from the group consisting of a phenol resin, epoxy resin, urea melamine, polyester resin, polyvinyl butyral, acrylonitrile-butadiene-rubber latex, degenerated heat-curable resin and a mixture thereof.