Grinding material

Abstract

An object of the present invention is to provide a grinding material in which grinding portions can be increased in thickness while a decrease in grinding rate is inhibited. The grinding material according to the present invention includes a base, and a grinding layer overlaid on a front face side of the base and containing abrasive grains and a binder. The grinding layer includes a plurality of columnar grinding portions. The plurality of the grinding portions are configured so that the grinding portions are arranged in a staggered manner. The average thickness of the grinding portions is no less than 300 μm. The area of a top face of each of the grinding portions is no less than 6 mm 2 . The average thickness of the base is no less than 300 μm and no greater than 3,000 μm.

1 . A grinding material comprising:
 a base; and   a grinding layer overlaid on a front face side of the base and containing abrasive grains and a binder, wherein   the grinding layer comprises a plurality of columnar grinding portions,   the plurality of the grinding portions are configured so that the grinding portions are arranged in a staggered manner,   an average thickness of the grinding portions is no less than 300 μm,   an area of a top face of each of the grinding portions is no less than 6 mm 2 , and   an average thickness of the base is no less than 300 μm and no greater than 3,000 μm.   
     
     
         2 . The grinding material according to  claim 1 , wherein a ratio of the average thickness of the grinding portions to the average thickness of the base is no less than 0.7 and no greater than 4. 
     
     
         3 . The grinding material according to  claim 1 , wherein a value obtained by dividing the area of the top face of each of the grinding portions by the average thickness of the grinding portions is no less than 0.015 mm 2 /μm and no greater than 0.04 mm 2 /μm. 
     
     
         4 . The grinding material according to  claim 1 , wherein
 the area of the top face of each of the grinding portions is no greater than 100 mm 2 , and   the average thickness of the grinding portions is no greater than 5,000 μm.   
     
     
         5 . The grinding material according to  claim 1 , wherein the binder comprises a thermosetting resin as a principal component.