Abrasive article with preconditioning and persistent indicators

Abstract

An abrasive article with a backing having a first major surface and a second major surface opposed to the first major surface. A three-dimensional abrasive layer attached to the first major surface, the three-dimensional abrasive layer comprising a plurality of shaped abrasive composites spaced apart by a plurality of land areas between the shaped abrasive composites, each of the shaped abrasive composites comprising a top surface and a sidewall, and the plurality of shaped abrasive composites and the plurality of land areas both formed from abrasive particles dispersed within an organic binder. A preconditioning indicator located on the top surface of at least some of the plurality of shaped abrasive composites and a persistent indicator located on at least some of the plurality of land areas.

1 . An abrasive article comprising:
 a backing having a first major surface and a second major surface opposed to the first major surface;   a three-dimensional abrasive layer attached to the first major surface, the three-dimensional abrasive layer comprising a plurality of shaped abrasive composites spaced apart by a plurality of land areas between the shaped abrasive composites, each of the shaped abrasive composites comprising a top surface and a sidewall, and the plurality of shaped abrasive composites and the plurality of land areas both formed from abrasive particles dispersed within an organic binder;   a preconditioning indicator located on the top surface of at least some of the plurality of shaped abrasive composites; and   a persistent indicator located on at least some of the plurality of land areas.   
     
     
         2 . The abrasive article of  claim 1  wherein the preconditioning indicator comprises a first coating on the top surface. 
     
     
         3 . The abrasive article of  claim 2  wherein the first coating comprises ink. 
     
     
         4 . The abrasive article of  claim 3  wherein the first coating comprises printed indicia. 
     
     
         5 . The abrasive article of  claim 1  comprising a circular abrasive disc and the preconditioning indicator comprises at least one stripe extending from a first side of the circular abrasive disc to a second side of the circular abrasive disc. 
     
     
         6 . The abrasive article of  claim 5  wherein the at least one stripe comprises printed indicia. 
     
     
         7 . The abrasive article of  claim 6  wherein the printed indicia also resides on at least some of the plurality of land areas. 
     
     
         8 . The abrasive article of  claim 1  wherein the persistent indicator comprises a second coating forming printed indicia. 
     
     
         9 . The abrasive article of  claim 8  wherein the persistent indicator comprises the second coating on the sidewall of at least some of the plurality of shaped abrasive composites. 
     
     
         10 . The abrasive article of  claim 9  wherein the second coating comprises ink. 
     
     
         11 . The abrasive article of  claim 10  wherein the plurality of shaped abrasive composites comprise a cross section having a hexagonal shape. 
     
     
         12 . The abrasive article of  claim 11  wherein the printed indicia comprise a height and the height is ¾ inch (1.91 cm) or greater.