Abrasive products having fibrillated fibers

• US 9,242,346 B2
• Filed: 03/29/2013
• Issued: 01/26/2016
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain), Saint-Gobain Abrasifs (Compagnie de Saint-Gobain SA)
• Original Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain)
• Inventors: Gaeta, Anthony C., Seth, Anuj, Herbert, Charles G., Everts, Darrell K., Csillag, Frank J., Labrecque, Julienne, Khatami, Kamran
• Primary Examiner(s): Parvini, Pegah
• Assistant Examiner(s): MOORE, ALEXANDRA MARIE
• Application Number:
  US13/853,994
• Publication Number:
  US 20130305614A1
• Time in Patent Office: 1,033 Days
• US Class Current: 1/1
• CPC Class Codes: B24D 11/001 Manufacture of flexible abrasive materials
• CPC Class Codes: B24D 3/20 and being essentially organic
• CPC Class Codes: B24D 3/28 Resins or natural or synthetic macromolecular compounds B24D3/22 takes precedence

Abstract

An engineered coated abrasive product having a backing, a frontfill coat, a make coat, and/or a size coat, wherein at least one of the coats includes fibrillated fibers. The coated abrasive product is capable of improved inter-layer adhesion, retention of abrasive grains, and/or maintenance of abrasive grains in a more desirable orientation for grinding.

Claims

1. A coated abrasive article comprising:

a backing;

a frontfill disposed on the backing;

a make coat disposed over the frontfill;

abrasive grains disposed on the make coat; and

a size coat disposed on the abrasive grains and make coat,

wherein fibrillated fibers are dispersed in at least one of the frontfill, make coat, size coat, or combinations thereof, and

wherein the fibrillated fibers comprise about 0.1 wt % to 3.0 wt % of the frontfill, about 0.1 wt % to 3.0 wt % of the make coat, or about 0.1 wt% to 3.0 wt % of the size coat.

2. The coated abrasive article of claim 1, wherein the fibrillated fibers have a length between 50 μ

m and 1000 μ

m.

3. The coated abrasive article of claim 2, wherein the frontfill, the make coat, or the size coat further comprises at least 10 wt % to not greater than 60 wt % of a filler.

4. The coated abrasive article of claim 2, wherein the fibrillated fibers comprise poly-paraphenylene terephthalamide pulp and wherein the fibrillated fibers comprise about 0.5 wt % to 1.5 wt % of the frontfill, about 0.5 wt % to 1.5 wt % of the make coat, or about 0.5 wt % to 1.5 wt % of the size coat.

5. The coated abrasive article of claim 3, wherein the filler is wollastonite.

6. The coated abrasive article of claim 4, wherein the fibrillated fibers have a specific surface area between 7.00-11.0 m² /g and a bulk density between 0.0481-0.112g/cc (0.00174-0.0045lb/in³).