Coated abrasive article and method of making the same

Patent metadata

Field	Value
Publication number	US-10836015-B2
Application number	US-201916385781-A
Country	US
Kind code	B2
Filing date	Apr 16, 2019
Priority date	Mar 30, 2015
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A coated abrasive article includes a backing, a make layer, crushed abrasive particles, and a size layer. The crushed abrasive particles include: 35 to 100 weight percent of initial crushed abrasive particles having a first composition and first size grade, wherein a majority of the initial crushed abrasive particles are platey crushed abrasive particles, and wherein each platey crushed abrasive particle has a respective length, width, and thickness; and 0 to 65 weight percent of crushed filler particles having a second composition and a second size grade. The first and second compositions and/or size grades are different. The coated abrasive article has a direction of intended use, a majority of the platey crushed abrasive particles of the coated abrasive article are positioned with their thickness oriented substantially parallel to the direction of intended use. A method of making the coated abrasive article is also disclosed.

First claim

What is claimed is:

1. A coated abrasive article comprising:
a backing having first and second opposed major surfaces;
a make layer secured to at least a portion of the first major surface of the backing;
crushed abrasive particles comprising, on a total weight basis:
35 to 100 weight percent of initial crushed abrasive particles having a first composition and first size grade, wherein a majority of the initial crushed abrasive particles are platey crushed abrasive particles, and wherein each platey crushed abrasive particle has a respective length, width, and thickness; and
0 to 65 weight percent of crushed filler particles having a second composition and a second size grade, wherein:
i) the first and second compositions are different;
ii) the first and second size grades are different; or
iii) both of i) and ii);

a size layer disposed on and secured to at least a portion of the make layer and platey crushed abrasive particles,
wherein the coated abrasive article has a direction of intended use, and wherein a majority of the platey crushed abrasive particles are positioned with their thickness oriented substantially parallel to the direction of intended use.

2. The coated abrasive article of claim 1 , further comprising a supersize layer disposed on at least a portion of the size layer.

3. The coated abrasive article of claim 1 , wherein the coated abrasive article is essentially free of shaped abrasive particles.

4. The coated abrasive article of claim 1 , wherein the platey crushed abrasive particles comprise alumina.

5. The coated abrasive article of claim 1 , wherein the coated abrasive article comprises a coated abrasive belt.

6. The coated abrasive article of claim 1 , wherein the coated abrasive article comprises an abrasive disc.

7. The coated abrasive article of claim 1 , wherein the crushed abrasive particles comprise, on a total weight basis:
35 to less than 100 weight percent of the initial crushed abrasive particles; and
greater than 0 to 65 weight percent of the crushed filler particles.

Assignees

• 3M Innovative Properties Co

Inventors

• Keipert Steven J

Classifications

• C09K3/1409

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

• B24D3/02 Primary

  the constituent being used as bonding agent · CPC title

• B24D11/00

  Constructional features of flexible abrasive materials; Special features in the manufacture of such materials · CPC title

• B01J2/22

  by pressing in moulds or between rollers · CPC title

• B24D3/28

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