Abrasive flap disc

Abstract

An abrasive flap disc having improved properties with respect to production and grinding behavior combines an abrasive grit having a special grit mixture consisting of 25% to 75% (high-performance ceramic) zirconium dioxide and of 25% to 75% aluminum oxide with a number of abrasive lamellae per abrasive flap disc in the range between 30 and 46.

What is claimed is: 
     
         1 . An abrasive flap disc having a diameter of 115 mm or 125 mm, further having a carrier plate and having abrasive lamellae, made of abrasive fabric coated with abrasive grid on one surface and which are glued with their other surface around a central opening on the carrier plate, comprising a base fabric and abrasive grit applied to the base fabric, whereby the abrasive grit is a grit mixture, which comprises 25% to 75% zirconium oxide and 25% to 75% aluminum oxide,
 the number of the abrasive lamellae is between 30 and 46, and   the abrasive lamellae have a rectangular shape having a width in the range between 24 mm and 30 mm and a length in the range between 19 mm and 26 mm.   
     
     
         2 . The abrasive flap disc according to  claim 1 ,
 wherein the grit mixture of the abrasive grit ( 7 ) comprises 50% to 75% zirconium oxide and 25% to 50% aluminum oxide.   
     
     
         3 . The abrasive flap disc according to  claim 1 ,
 wherein the grit mixture of the abrasive grit ( 7 ) comprises 70% to 75% zirconium oxide, and 25% to 30% aluminum oxide.   
     
     
         4 . The abrasive flap disc according to  claim 1 ,
 wherein the number of the abrasive lamellae is between 34 and 44.   
     
     
         5 . The abrasive flap disc according to  claim 1 ,
 wherein the number of the abrasive lamellae is 44.   
     
     
         6 . The abrasive flap disc according to  claim 1 ,
 wherein the base fabric comprises polyester or a mixture of polyester and cotton.   
     
     
         7 . The abrasive flap disc according to  claim 1 ,
 wherein the abrasive fabric has calcium carbonate as a filler and/or phenol resin as a binder.   
     
     
         8 . The abrasive flap disc according to  claim 1 ,
 wherein the proportion on the abrasive fabric is 20% to 50% zirconium dioxide and 6% to 20% aluminum oxide.   
     
     
         9 . The abrasive flap disc according to  claim 1 ,
 wherein the proportion on the abrasive fabric is 25% to 35% zirconium dioxide and 6% to 15% aluminum oxide.   
     
     
         10 . The abrasive flap disc according to  claim 1 ,
 wherein the proportion on the abrasive fabric is 30% to 32% zirconium dioxide and 7% to 10% aluminum oxide.   
     
     
         11 . The abrasive flap disc according to  claim 1 ,
 wherein the abrasive lamellae are arranged at an angle (α) in the range between 3° to 13° to the support surface of the carrier plate.   
     
     
         12 . The abrasive flap disc according to  claim 1 ,
 wherein the abrasive lamellae are arranged at an angle (α) in the range between 9° and 12° to the support surface of the carrier plate.