IP Library › Granted Patent US 12,384,004
Granted Patent B2
US 12,384,004 · App. 18/544,685 · Granted Aug 12, 2025

Abrasive articles and methods of forming same

Inventors: Anthony Martone (Belmont, MA); Hua Fan (Southborough, MA); Kelley McNeal (Northborough, MA)
Assignees: SAINT-GOBAIN ABRASIVES, INC.; SAINT-GOBAIN ABRASIFS
B24D11/02B24D3/00B24D11/005
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Quick Facts
Patent No.
US 12,384,004
App. No.
18/544,685
Granted
Aug 12, 2025
Kind
B2
Abstract

An abrasive article includes a backing; a make coat overlying the backing; and a plurality of abrasive particles overlying the backing and at least partially contained in the make coat; and a make coat thickness ratio (Tg/Ta) of not greater than 1.5, wherein Tg is the average thickness of the make coat at the sides of the abrasive particles and the Ta is the average thickness of the make coat.

Claims (53)

1. An abrasive article comprising:

a backing;

a make coat overlying the backing;

a plurality of abrasive particles overlying the backing and at least partially contained in the make coat;

a make coat thickness ratio (Tg/Ta) of not greater than 1.5, wherein Tg is the average thickness of the make coat at the sides of the abrasive particles and the Ta is the average thickness of the make coat;

and wherein at least 60% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees; and

wherein the plurality of abrasive particles comprises a plurality of shaped abrasive particles, each of the shaped abrasive particles of the plurality of shaped abrasive particles including at least 3 interior corners, wherein each of the shaped abrasive particles comprises a body including a first major surface, a second major surface opposite the first major surface, and a side surface extending between the first major surface and the second major surface;

and wherein not greater than 50% of the total number of shaped abrasive particles have a crack at an interior corner on the first major surface.

2. The abrasive article of claim 1 , wherein the body of each of the shaped abrasive particles comprises at least 3 exterior corners and wherein the side surface comprises at least 4 side surface sections.

3. The abrasive article of claim 1 , wherein the shaped abrasive particles have a three-pointed star two-dimensional shape as viewed in a plane of a length and width of the body.

4. The abrasive article of claim 1 , wherein the thickness ratio (Tg/Ta) is not greater than 1.5 and at least 0.70.

5. The abrasive article of claim 4 , wherein the thickness ratio (Tg/Ta) is not greater than 1.5 and at least 0.80.

6. The abrasive article of claim 5 , wherein the thickness ratio (Tg/Ta) is not greater than 1.5 and at least 0.90.

7. The abrasive article of claim 4 , wherein the make coat comprises a thickness standard deviation at the sides of the abrasive particles (STDTg) of not greater than 70 microns.

8. The abrasive article of claim 7 , wherein the make coat thickness standard deviation at the sides of the abrasive particles (STDTg) is at least 10 microns and not greater than 70 microns.

9. The abrasive article of claim 8 , wherein the make coat thickness standard deviation at the sides of the abrasive particles (STDTg) is at least 10 microns and not greater than 65 microns.

10. The abrasive article of claim 7 , wherein at least 70% of the total plurality of abrasive particles comprising a plurality of shaped abrasive particles are well oriented.

11. The abrasive article of claim 10 , wherein at least 80% of the plurality of abrasive particles comprising a plurality of shaped abrasive particles are well oriented.

12. The abrasive article of claim 7 , further comprising a coating density of well oriented particles of at least 42 grains/cm 2 .

13. The abrasive article of claim 12 , further comprising a coating density of well oriented particles of at least 46 grains/cm 2 .

14. The abrasive article of claim 4 , further comprising a standing portion of shaped abrasive particles (Pst) having a standing orientation and a slanted portion (Psl) of shaped abrasive particles having a slanted orientation, and further comprising a ratio of the standing portion relative to the slanted portion (Pst/Psl) of at least 1 and not greater than 100.

15. The abrasive article of claim 4 , further comprising a standing portion of shaped abrasive particles (Pst) having a standing orientation and a fallen portion (Pf) of shaped abrasive particles having a fallen orientation, and further comprising a ratio of the standing portion relative to the fallen portion (Pst/Pf) of at least 2.0 and not greater than 1000.

16. The abrasive article of claim 15 , further comprising a percentage of fallen shaped abrasive particles having a tilt angle of 0 to 5 degrees of not greater than 20% of the plurality of abrasive particles comprising a plurality of shaped abrasive particles.

17. An abrasive article comprising:

a backing;

a make coat overlying the backing;

a plurality of abrasive particles overlying the backing and at least partially contained in the make coat;

a make coat thickness ratio (Tg/Ta) of at least 0.7 and not greater than 1.5, wherein Tg is the average thickness of the make coat at the sides of the abrasive particles and the Ta is the average thickness of the make coat;

wherein at least 60% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees; and

wherein the make coat comprises a thickness standard deviation at the sides of the abrasive particles (STDTg) of at least 10 microns and not greater than 70 microns.

18. The abrasive article of claim 17 , wherein the thickness ratio (Tg/Ta) is not greater than 1.5 and at least 1.

19. The abrasive article of claim 18 , wherein at least 80% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees.

20. The abrasive article of claim 19 , wherein the shaped abrasive particles have a three-pointed star two-dimensional shape as viewed in a plane of a length and width of the body.

21. An abrasive article comprising:

a backing;

a make coat overlying the backing;

a plurality of abrasive particles overlying the backing and at least partially contained in the make coat;

a make coat thickness ratio (Tg/Ta) of at least 0.7 and not greater than 1.5, wherein Tg is the average thickness of the make coat at the sides of the abrasive particles and the Ta is the average thickness of the make coat;

wherein at least 60% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees; and

further comprising a standing portion of abrasive particles (Pst) having a standing orientation and a slanted portion (Psl) of abrasive particles having a slanted orientation, and further comprising a ratio of the standing portion relative to the slanted portion (Pst/Psl) of at least 1 and not greater than 100.

22. The abrasive article of claim 21 , wherein the thickness ratio (Tg/Ta) is not greater than 1.5 and at least 1.

23. The abrasive article of claim 22 , wherein at least 80% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees.

24. The abrasive article of claim 23 , wherein the shaped abrasive particles have a three-pointed star two-dimensional shape as viewed in a plane of a length and width of the body.

25. An abrasive article comprising:

a backing;

a make coat overlying the backing;

a plurality of abrasive particles overlying the backing and at least partially contained in the make coat;

a make coat thickness ratio (Tg/Ta) of at least 0.7 and not greater than 1.5, wherein Tg is the average thickness of the make coat at the sides of the abrasive particles and the Ta is the average thickness of the make coat;

wherein at least 60% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees; and

further comprising a standing portion of abrasive particles (Pst) having a standing orientation and a fallen portion (Pf) of abrasive particles having a fallen orientation, and further comprising a ratio of the standing portion relative to the fallen portion (Pst/Pf) of at least 2.0 and not greater than 1000.

26. The abrasive article of claim 25 , wherein the thickness ratio (Tg/Ta) is not greater than 1.5 and at least 1.

27. The abrasive article of claim 26 , wherein at least 80% of the total number of the abrasive particles are well oriented having a tilt angle of 5 to 90 degrees.

28. The abrasive article of claim 27 , wherein the shaped abrasive particles have a three-pointed star two-dimensional shape as viewed in a plane of a length and width of the body.

Continuity (3)
Continuation 18148403 · Dec 29, 2022
Provisional Application 63266269 · Dec 30, 2021
Related Publication 20240116153A1 · Apr 11, 2024
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