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US 5,366,523 AGranted
Abrasive article containing shaped abrasive particles
AssigneeMinnesota Mining and Manufacturing Company
InventorsDonley D. Rowenhorst, Todd A. Berg
Life of this patent
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AssigneeMinnesota Mining and Manufacturing Company
InventorsDonley D. Rowenhorst, Todd A. Berg
Estimating the term…
An abrasive article comprising a binder and abrasive grits, wherein the abrasive grits comprise abrasive particles having specified shapes. Coated abrasive articles of this invention comprise a backing having at least one layer of abrasive material adhered thereto by means of a binder. A portion of this layer contains abrasive particles having specified shapes. It is preferred that the geometric shape of these abrasive particles be triangular. For triangular-shaped particles, about 35% to about 65% of the particles are oriented with a vertex pointing away from the backing and a base in contact with the binder, with about 35% to about 65% of the particles being oriented with a base pointing away from the backing and a vertex in contact with the binder. It is believed that this configuration brings about the result that the sum of the surface areas of each of the particles in contact with the workpiece remains essentially constant during use, even though the surface area of each individual abrasive particle in contact with the workpiece varies during use. The use of the abrasive particles described herein minimizes the formation of flat surfaces on the cutting regions of the abrasive grits.
An abrasive article comprising a binder and abrasive grits, wherein at least 10% by weight of said abrasive grits are abrasive particles, each of said abrasive particles having a front face and a back face, said front face having substantially the same geometric shape as said back face, said faces being separated by the thickness of said particle, the ratio of the length of the shortest facial dimension of said particle to the thickness of said particle being at least 1 to 1.
A coated abrasive article comprising a backing having at least one layer of abrasive grits adhered thereto by means of a binder, said abrasive grits comprising abrasive particles, each of said abrasive particles having a front face and a back face, said faces being separated by the thickness of said particle, said faces having the geometric shape of a triangle, the thickness of said particle being substantially uniform and being less than the length of the shortest side of said triangle, wherein from about 35% to about 65% of said triangular-shaped particles are oriented with a vertex pointing away from said backing and from about 35% to about 65% of said triangular-shaped particles are oriented such that a base is pointing away from said backing.
A coated abrasive article comprising a backing having at least one layer of abrasive grits adhered thereto by means of a binder, wherein at least 10% by weight of said abrasive grits are abrasive particles, each of said abrasive particles having a front face and a back face, said front face having substantially the same geometric shape as said back face, said faces being separated by the thickness of said particle, the ratio of the length of the shortest facial dimension of said particle to the thickness of said particle being at least 1 to 1, whereby during the use of said article during abrading, the area of each abrasive particle in contact with the surface of the workpiece continually changes, but the sum of the areas of each abrasive particle in contact with the surface of the workpiece essentially remains constant.
Dependencies are inferred from the claim text.