Method of making a coated abrasive article and coated abrasive article

Abstract

A coated abrasive article comprises: a backing having first and second opposed major surfaces; a make layer disposed on the first major surface of the backing; shaped abrasive particles partially embedded in the make layer wherein the shaped abrasive particles are triangular platelets; and a size layer disposed over the make layer and shaped abrasive particles, wherein the size layer comprises a thermoset polymer. The make layer comprise at least partially cured animal glue. A method of making the coated abrasive article is also disclosed.

1 . A method of making a coated abrasive article, the method comprising:
 providing a backing having first and second opposed major surfaces;   disposing a make layer precursor comprising water-based animal glue on the first major surface of the backing;   partially embedding shaped abrasive particles in the water-based animal glue, wherein the shaped abrasive particles comprise three-sided platelets; and   at least partially curing the make layer precursor.   
     
     
         2 . The method of  claim 1 , wherein the animal glue comprises hide glue. 
     
     
         3 . The method of  claim 1 , wherein the animal glue has a viscosity of 100 to 200 cps (100 to 200 mPa·sec) at 21° C. 
     
     
         4 . The method of  claim 1 , wherein the shaped abrasive particles comprise alpha alumina. 
     
     
         5 . The method of  claim 1 , wherein the make layer precursor further comprises filler. 
     
     
         6 . The method of  claim 1 , further comprising:
 disposing size layer precursor on the at least partially cured make layer precursor and the abrasive particles; and   at least partially curing the size layer precursor.   
     
     
         7 . The method of  claim 6 , further comprising disposing a supersize layer on the at least partially cured size layer precursor. 
     
     
         8 . A coated abrasive article comprising:
 a backing having first and second opposed major surfaces;   a make layer disposed on the first major surface of the backing, wherein the make layer comprises at least partially cured animal glue;   shaped abrasive particles partially embedded in the make layer wherein the shaped abrasive particles are platelets having three sidewalls;   a size layer disposed over the make layer and shaped abrasive particles, wherein the size layer comprises a thermoset polymer.   
     
     
         9 . The coated abrasive article of  claim 8 , wherein the animal glue comprises hide glue. 
     
     
         10 . The coated abrasive article of  claim 8 , wherein the shaped abrasive particles comprise alpha alumina. 
     
     
         11 . The coated abrasive article of  claim 8 , wherein the make layer further comprises filler. 
     
     
         12 . The coated abrasive article of  claim 8 , further comprising a supersize layer disposed on the size layer. 
     
     
         13 . The coated abrasive article of  claim 8 , wherein the platelets are triangular. 
     
     
         14 . The coated abrasive article of  claim 8 , wherein at least one of the three sidewalls is concave. 
     
     
         15 . The coated abrasive article of  claim 8 , wherein the backing comprises at least one of a needletacked, meltspun, spunbonded, hydroentangled, or meltblown nonwoven fabric, a knitted fabric, a stitchbonded fabric, a woven fabric, a scrim, or a polymer film. 
     
     
         16 . The method of  claim 1 , wherein the platelets are triangular. 
     
     
         17 . The method of  claim 1 , wherein at least one of the three sidewalls is concave. 
     
     
         18 . The method of  claim 1 , wherein the backing comprises at least one of a needletacked, meltspun, spunbonded, hydroentangled, or meltblown nonwoven fabric, a knitted fabric, a stitchbonded fabric, a woven fabric, a scrim, or a polymer film. 
     
     
         19 . The method of  claim 1 , wherein disposing the make layer precursor is carried out by at least one of roll coating, gravure roll coating, curtain coating, knife coating, notch bar coating, or spraying. 
     
     
         20 . The method of  claim 1 , further comprising applying the shaped abrasive particles onto the make layer precursor by drop coating, electrostatic coating, magnetic coating, or transfer from a production tool.