Abrasive article with different pluralities of abrasive particles

Patent metadata

Field	Value
Publication number	US-11648646-B2
Application number	US-201716470576-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Dec 21, 2016
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

An abrasive article includes a first plurality of abrasive particles and a second plurality of abrasive particles. The first plurality of abrasive particles differ in at least one of a size, an average weight and a shape from the second plurality of abrasive particles. The first plurality of abrasive particles are spaced from the second plurality of abrasive particles by at least a minimum distance in the x-axis direction, and both the first plurality of abrasive particles and the second plurality of abrasive particles extend in similar paths to one another with respect to the y-axis.

First claim

What is claimed is:

1. An abrasive article having a y-axis, an x-axis transverse to the y-axis, and a z-axis orthogonal to the y-axis and x-axis, the abrasive article comprising a first plurality of abrasive particles and a second plurality of abrasive particles, wherein the first plurality of abrasive particles differ in at least one of a size, an average weight, a composition chemistry and a shape from the second plurality of abrasive particles, and wherein the first plurality of abrasive particles are spaced from the second plurality of abrasive particles by at least a minimum distance in the x-axis direction, and both the first plurality of abrasive particles and the second plurality of abrasive particles extend in similar paths to one another with respect to the y-axis;
wherein the average deviation of the location of a single abrasive particle of at least one of the first plurality of abrasive particles and the second plurality of abrasive particles within a single row varies randomly by no more than about plus or minus (+/−) 4 times the thickness of the single abrasive particle.

2. The abrasive article of claim 1 , wherein the rotational orientation of at least a portion of both the first plurality of abrasive particles and the second plurality of abrasive particles about the z-axis varies randomly but within a defined range.

3. The abrasive article of claim 1 , wherein the spacing between each of the first plurality of abrasive particles varies randomly along the y-axis.

4. The abrasive article of claim 1 , wherein the spacing between each of the second plurality of abrasive particles varies randomly along the y-axis.

5. The abrasive article of claim 1 , wherein a spacing between the first plurality of abrasive particles and the second plurality of abrasive particles in the x-axis direction is constrained to a first defined range and varies between the minimum distance and a maximum distance.

6. The abrasive article of claim 5 , wherein a spacing of each of the first plurality of abrasive particles with respect to one another in the x-axis direction varies within a second defined range.

7. The abrasive article of claim 6 , wherein a spacing of each of the second plurality of abrasive particles with respect to one another in the x-axis direction varies within a third defined range.

8. The abrasive article of claim 1 , wherein the first plurality of abrasive particles and the second plurality of abrasive particles are arranged in alternating rows.

9. The abrasive article of claim 1 , wherein both the first plurality of abrasive particles and the second plurality of abrasive particles each follow a non-linear path so as to vary along the x-axis direction and the y-axis direction of the abrasive article.

10. The abrasive article of claim 1 , wherein at least one of the first plurality of abrasive particles and the second plurality of abrasive particles are shaped abrasive particles, and wherein a majority of at least one of the first plurality of abrasive particles and the second plurality of abrasive particles are configured to be oriented with a minor surface disposed on a backing and a major surface disposed at least 70 degrees to the backing.

11. The abrasive article of claim 10 , wherein the shaped abrasive particles comprise trigonal platelets.

12. The abrasive article of claim 10 , wherein the first plurality of abrasive particles comprise shaped abrasive particles and the second plurality of abrasive particles comprise crushed abrasive particles.

13. The abrasive article of claim 10 , wherein the first plurality of abrasive particles comprise shaped abrasive particles of a first size and first average weight, and wherein the second plurality of abrasive particles comprise shaped abrasive particles of a second size and second average weight that differs from the first size and first average weight.

14. The abrasive article of claim 10 , wherein the abrasive article includes a mixture of abrasive particles that include the first plurality of abrasive particles having a generally uniform size and shape and second plurality of abrasive particles having a generally uniform size and a non-uniform shape.

15. The abrasive article of claim 1 , wherein about 80-90 percent of the at least one of the first plurality of abrasive particles and the second plurality of abrasive particles are inclined at an angle of at least about 45 degrees from a surface that extends in the x and y axes.

16. The abrasive article of claim 1 , wherein the abrasive article is a coated abrasive article comprising:
a backing having opposed first and second major surfaces, a longitudinal axis corresponding to the y-axis, and a transverse axis corresponding to the x-axis;
a make coat on at least a portion of one of the first and second major surfaces; and
wherein the first and second pluralities of abrasive particles are secured to the backing via the make coat.

17. The coated abrasive article of claim 16 , wherein a spacing between the first plurality of abrasive particles and the second plurality of abrasive particles in the transverse axis direction is constrained to a first defined range and varies between the minimum distance and a maximum distance.

18. The coated abrasive article of claim 16 , wherein the first plurality of abrasive particles and the second plurality of abrasive particles are arranged in alternating rows.

19. An abrasive disc comprising:
a backing having opposed first and second major surfaces, a radial axis, an annular path, and a z-axis orthogonal to at least one of the first and second major surfaces;
a make coat on at least one of the first and second major surfaces; and
a plurality of abrasive particles secured to the backing via the make coat, wherein the plurality of abrasive particles comprises a first plurality of abrasive particles and a second plurality of abrasive particles, wherein the first plurality of abrasive particles differ in at least one of a size, an average weight and a shape from the second plurality of abrasive particles
wherein the first plurality of abrasive particles are spaced from the second plurality of abrasive particles by at least a minimum distance in the radial axis direction, and both the first plurality of abrasive particles and the second plurality of abrasive particles extend in similar paths to one another with respect to the annular path direction;
wherein the average deviation of the location of a single abrasive particle of at least one of the first plurality of abrasive particles and the second plurality of abrasive particles within a single path varies randomly by no more than about plus or minus (+/−) 4 times the thickness of the single abrasive particle.

20. An abrasive article having a y-axis, an x-axis transverse to the y-axis, and a z-axis orthogonal to the y-axis and x-axis, the abrasive article comprising a first plurality of abrasive particles and a second plurality of abrasive particles, wherein the first plurality of abrasive particles differ in at least one of a size, an average weight, a composition chemistry and a shape from the second plurality of abrasive particles, and wherein the first plurality of abrasive particles are spaced from the second plurality of abrasive particles by at least a minimum distance in the x-axis direction, and both the first plurality of abrasive particles and the second plurality of abrasive particles extend in similar paths to one another with respect to the y-axis;
wherein the first plurality of abrasive particles comprise shaped abrasive

Assignees

• 3M Innovative Properties Company

Inventors

• Liu Yuyang
• Wilson Geoffrey I
• Li Junting
• Thurber Ernest L

Classifications

• B24D11/04 Primary

  Zonally-graded surfaces · CPC title

• C09K3/1409

  Abrasive particles per se (preparation of diamond C01B32/25) · CPC title

• B24D3/28

  Resins {or natural or synthetic macromolecular compounds (B24D3/22 takes precedence)} · CPC title

• B24D11/001

  Manufacture of flexible abrasive materials · CPC title

• B24D18/0072 Primary

  using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing · CPC title