Abrasive article having a core including a polymer material

Abstract

An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.

What is claimed is: 
     
         1 . An abrasive article, comprising:
 a bonded abrasive body disposed within an interior recess of a peripheral surface of a core, wherein the core comprises a polymer material and the core has an HDT at 0.45 MPa of at least about 130° C.   
     
     
         2 . An abrasive article, comprising:
 a bonded abrasive body disposed within an interior recess of a peripheral surface of a core, wherein the core comprises a polymer material and the core has a shrinkage ratio of not greater than about 3%.   
     
     
         3 . The abrasive article of  claim 1 , wherein the core has an HDT at 0.45 MPa of at least about 140° C. 
     
     
         4 . The abrasive article of  claim 2 , wherein the core has a shrinkage of not greater than 2.5%. 
     
     
         5 . The abrasive article of  claim 3 , wherein a ratio of the thickness of the outer radial portion (Tor) to a thickness of the inner portion (Tir) is from about 1:1 to about 10:1. 
     
     
         6 . The abrasive article of  claim 4 , wherein the MOE is at least about 5000 MPa. 
     
     
         7 . The abrasive article of  claim 1 , wherein the polymer material includes at least one of a polyamide (PA), a polybutylene terephthalate (PBT), a polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), a polyetherketone (PEEK), a polyester (PE), a polyethyleneimine (PEI), a polyethersulfone (PESU), a polyethylene terephthalate (PET), a polyphthalamide (PPA), a poly (p-phenylene sulfide), polycarbonate (PC), or a combination thereof. 
     
     
         8 . The abrasive article of  claim 7 , wherein the polymer material includes nylon. 
     
     
         9 . The abrasive article of  claim 8 , wherein the nylon includes nylon 6, nylon 66, nylon 610, nylon 612, nylon 66/6, nylon 410, or nylon 46. 
     
     
         10 . The abrasive article of  claim 1 , wherein the bonded abrasive body comprises abrasive particles selected from the group consisting of diamond, cubic boron nitride, silicon carbide, boron carbide, alumina, silicon nitride, tungsten carbide, zirconia, or a combination thereof. 
     
     
         11 . The abrasive article of  claim 10 , wherein the abrasive particles comprise diamond. 
     
     
         12 . The abrasive article of  claim 1 , wherein a bond material of the bonded abrasive body includes Cu, Sn, Fe, W, WC, Co, Ti or any combination thereof. 
     
     
         13 . The abrasive article of  claim 1 , wherein a ratio of a maximum diameter of the core to a maximum thickness of the core is between about 30:1 to about 10:1. 
     
     
         14 . The abrasive article of  claim 1 , wherein the core is in direct contact with the bonded abrasive body. 
     
     
         15 . The abrasive article of  claim 1 , further comprising a vibration damping layer disposed between at least a portion of the core and a portion of the bonded abrasive body. 
     
     
         16 . The abrasive article of  claim 15 , wherein the vibration damping layer comprises a polymer material. 
     
     
         17 . The abrasive article of  claim 16 , wherein the polymer material of the vibration damping layer includes silicone, a thermoplastic or a thermoset rubber, a thermoplastic elastomer, a polyurethane, or a combination thereof. 
     
     
         18 . The abrasive article of  claim 17 , wherein the polymer material comprises silicone. 
     
     
         19 . The abrasive article of  claim 18 , wherein the vibration damping layer consists essentially of silicone. 
     
     
         20 . The abrasive article of  claim 19 , wherein the vibration damping layer has a modulus of elasticity (MOE) of at least 50.