Abrasive article and method of making the same

Patent metadata

Field	Value
Publication number	US-11826883-B2
Application number	US-201716471015-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Dec 22, 2016
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Various embodiments disclosed relate to an abrasive article. The abrasive article includes a first major surface and an opposed second major surface. Each major surface contacts a peripheral side surface. A central axis extends through the first and second major surfaces. A first layer of abrasive particles is dispersed within the abrasive article according to a first predetermined pattern. Further a second layer of abrasive particles spaced apart from the first layer of abrasive particles and is dispersed within the abrasive article along a according to a second predetermined pattern. A binder material retains the first and second layers of abrasive particles in the abrasive article. A portion of the binder material is located between the first and second layers of abrasive particles. That portion of the binder material is substantially continuous.

First claim

What is claimed is:

1. An abrasive article comprising:
a first major surface and an opposed second major surface each contacting a peripheral side surface;
a central axis extending through the first and second major surfaces;
a first layer of abrasive particles dispersed within the abrasive article according to a first predetermined pattern, wherein the first predetermined pattern comprises precise spacing between adjacent particles, and precise orientation of abrasive particles in the first layer of abrasive particles;
a second layer of abrasive particles spaced apart from the first layer of abrasive particles and dispersed within the abrasive article according to a second predetermined pattern; and
a binder material retaining the first and second layers of abrasive particles, wherein at least a portion of the binder material located between the first and second layers of abrasive particles is substantially continuous therebetween;
wherein the first layer of abrasive particles comprises at least one of a first plurality of abrasive particles and a second plurality of abrasive particles that is different than the first plurality of particles; and
wherein the first and second layers of abrasive particles are incorporated into the abrasive article free of a scrim layer.

2. The abrasive article of claim 1 , wherein the first major surface and the second major surface have a substantially circular profile.

3. The abrasive article of claim 1 , further comprising a central aperture extending at least partially between the first and second major surfaces.

4. The abrasive article of claim 3 , wherein the central axis extends through the central aperture.

5. The abrasive article of claim 1 , optionally further comprising a third layer of abrasive particles adjacent to at least one of the first or second layers of abrasive particles and dispersed within the abrasive article according to a third predetermined pattern.

6. The abrasive article of claim 5 , wherein the article is free of a reinforcing layer between adjacent layers of abrasive particles.

7. The abrasive article of claim 5 , wherein a portion of a majority of the abrasive particles of the first layer or third layer comprises a portion of the first major surface and wherein a portion of each abrasive particle of the second layer or third layer defines a portion of the second major surface.

8. The abrasive article of claim 5 , wherein at least one of the first layer of abrasive particles, the second layer of abrasive particles, and the third layer of abrasive particles ranges from about 2 wt % to about 50 wt % of the abrasive article.

9. The abrasive article of claim 1 , wherein the binder material comprises an organic binder, a vitrified binder, or a metallic binder.

Assignees

• 3M Innovative Properties Company
• Innovative Properties Company

Inventors

• Castillo Maria C
• Nienaber Aaron K
• Eckel Joseph B
• Givot Maiken

Classifications

• B24D3/20 Primary

  and being essentially organic · CPC title

• B24D3/06

  metallic {or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements} · CPC title

• B24D3/14

  ceramic, i.e. vitrified bondings · CPC title

• B24D7/14

  Zonally-graded wheels; Composite wheels comprising different abrasives · CPC title

• B24D18/0009

  using moulds or presses · CPC title