Abrasive article including shaped abrasive particles

• US 9,604,346 B2
• Filed: 06/27/2014
• Issued: 03/28/2017
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie de Saint-Gobain SA)
• Inventors: Breder, Kristin, Iyengar, Sujatha, Arcona, Christopher, Gaeta, Anthony C.
• Primary Examiner(s): Parvini, Pegah
• Application Number:
  US14/318,298
• Publication Number:
  US 20150000210A1
• Time in Patent Office: 1,005 Days
• US Class Current: 1/1
• CPC Class Codes: B24D 11/00 Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
• CPC Class Codes: B24D 3/00 Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents

Abstract

A coated abrasive article including a plurality of shaped abrasive particles overlying a backing, the coated abrasive article having a plain-carbon steel grinding lifespan of at least about 5500 g/in.

Claims

1. A coated abrasive article comprising a plurality of shaped abrasive particles overlying a backing, wherein each of the shaped abrasive particles of the plurality of shaped abrasive particles includes a body comprising alumina having an average crystallite size within a range including at least 0.01 microns and not greater than 1 micron, the coated abrasive article having a plain-carbon steel lifespan grinding efficiency of not greater than about 3.0 hp min/in³ per 6000 g/in of initial material removed.

2. The coated abrasive article of claim 1, wherein the coated abrasive article further comprises a plain-carbon steel grinding lifespan of at least about 5500 g/in.

3. The coated abrasive article of claim 1, wherein the coated abrasive article comprises a plain-carbon steel G-ratio (MR/MW) of at least about 90 for a plain-carbon steel grinding lifespan of at least about 6000 g/in.

4. The coated abrasive article of claim 1, wherein the coated abrasive article comprises a plain-carbon steel half-life of at least about 3000 g/in.

5. The coated abrasive article of claim 1, wherein the coated abrasive article comprises a plain-carbon steel half-life grinding efficiency of not greater than about 3.0 hp min/in³ per 3000 g/in of initial material removed.

6. The coated abrasive article of claim 1, wherein each shaped abrasive particle of the plurality of shaped abrasive particles comprises a body having a length (l), a width (w), and a height (h), wherein the width>

length, the length>

height, and the width>

height.

7. The coated abrasive article of claim 6, wherein the body comprises a percent flashing of between about 1% and about 40%.

8. The coated abrasive article of claim 6, wherein the body comprises a two-dimensional polygonal shape as viewed in a plane defined by a length and a width of the body, wherein the body comprises a shape selected from the group consisting of triangular, quadrilateral, rectangular, trapezoidal, pentagonal, hexagonal, heptagonal, octagonal, and a combination thereof.

9. The coated abrasive article of claim 6, wherein at least 70% of the plurality of shaped abrasive particles are oriented in a predetermined side orientation.

10. The coated abrasive article of claim 9, wherein the coated abrasive article includes a normalized weight of shaped abrasive particles of at least 20 lbs/ream and not greater than 60 lbs/ream.

11. The coated abrasive article of claim 6, wherein the body comprises an additive comprising a rare-earth element.

12. The coated abrasive article of claim 1, wherein each shaped abrasive particle of the plurality of shaped abrasive particles is arranged in a controlled orientation relative to the backing, the controlled orientation including at least one of a predetermined rotational orientation, a predetermined lateral orientation, and a predetermined longitudinal orientation.

13. The coated abrasive article of claim 1, wherein a portion of the shaped abrasive particles of the plurality of shaped abrasive particles comprises a trench region in an upper surface of the body.

14. The coated abrasive article of claim 1, wherein at least 70% of the plurality of shaped abrasive particles are oriented in a predetermined side orientation.

15. The coated abrasive article of claim 14, wherein the coated abrasive article includes a normalized weight of shaped abrasive particles of at least 20 lbs/ream and not greater than 60 lbs/ream.