Conformable abrasive article

Abstract

The present disclosure provides abrasive articles that include an abrasive layer having a contact surface, a first layer coupled to the abrasive layer, and a second layer coupled to the first layer. The first layer is configured to provide contact pressure to the abrasive layer, such as through a higher hardness than the second layer. The second layer is configured to provide conformability to the abrasive layer, such as through a higher compressibility than the first layer. The resulting abrasive articles may exert a consistent contact pressure against a substrate with increased conformability around the substrate, reduced hysteresis, improved removal rate consistency, and/or improved lifetime over abrasive articles that do not use the multiple layer construction described above.

1 . An abrasive article, comprising:
 an abrasive layer having a contact surface;   a first layer coupled to the abrasive layer; and   a second layer coupled to the first layer, wherein the second layer has a compressibility at 25% deflection of no greater than 1.5 MPa and the compressibility at 25% deflection of the first layer is greater than the compressibility at 25% deflection of the second layer.   
     
     
         2 . The abrasive article of  claim 1 , wherein the compressibility at 25% deflection of the second layer is less than 1.1 MPa. 
     
     
         3 . The abrasive article of  claim 1 , wherein a ratio of the compressibility at 25% deflection of the first layer to the compressibility at 25% deflection of the second layer is greater than 1 and less than 200, wherein the first layer is measured by ASTM D575 and the second layer is measured by ASTM D3574. 
     
     
         4 . The abrasive article of  claim 1 , wherein the first layer has a first thickness and the second layer has a second thickness that is greater than the first thickness. 
     
     
         5 . The abrasive article of  claim 4 , wherein the first thickness is less than 3 mm. 
     
     
         6 . The abrasive article of  claim 4 , wherein a ratio of the first thickness to the second thickness is less than 0.75. 
     
     
         7 . The abrasive article of  claim 1 , wherein the first layer comprises at least one of an elastomer, a fabric, or a nonwoven material. 
     
     
         8 . The abrasive article of  claim 1 , wherein the second layer comprises at least one of a foam, an engraved, structured, 3D printed, or embossed elastomer, a fabric or nonwoven layer, or a rubber having a Shore A hardness less than 50. 
     
     
         9 . The abrasive article of  claim 1 , further comprising an adhesive disposed between the abrasive layer and the first layer. 
     
     
         10 . The abrasive article of  claim 1 , further comprising an adhesive disposed between the first layer and the second layer. 
     
     
         11 . The abrasive article of  claim 1 , wherein the contact surface of the abrasive layer includes a microstructured surface. 
     
     
         12 . The abrasive article of  claim 1 , wherein the contact surface comprises a plurality of precisely shaped abrasive composites. 
     
     
         13 . The abrasive article of  claim 1 , wherein at least one of the first layer and second layer has a relaxation modulus of less than 25%. 
     
     
         14 . The abrasive article of  claim 1 , wherein the first layer and the second layer are configured to substantially conform the contact surface of the abrasive layer to at least one of a first corner and second corner of a substrate, wherein the substrate includes a first major surface, a second major surface and an edge surface, the edge surface intersecting the first major surface to form the first corner, the edge surface intersecting the second major surface to form the second corner and the thickness of the edge surface measured normal to the first and second major surfaces is no greater 5 mm. 
     
     
         15 . The abrasive article of  claim 14 , wherein at least one of the first corner and second corner includes at least one of a chamfered corner and curved corner.