Abrasive tools and methods for forming same

Patent metadata

Field	Value
Publication number	US-9844853-B2
Application number	US-201514985041-A
Country	US
Kind code	B2
Filing date	Dec 30, 2015
Priority date	Dec 30, 2014
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

An abrasive tool can include a bonded abrasive including a body and a barrier layer bonded to a major surface of the body. The body can include abrasive particles contained within a bond material. The barrier material can include a metal-containing film. In an embodiment, the barrier layer may further include a polymer-containing film. In another embodiment, the barrier layer may include a biaxially oriented material. The abrasive tool may be formed such that the barrier layer is formed in-situ with the formation of the bonded abrasive.

First claim

What is claimed is:

1. An abrasive tool comprising:
a bonded abrasive including a body comprising abrasive particles contained within a bond material; and
a barrier layer bonded to at least a major surface of the body, the barrier layer comprising a metal-containing film and further comprising a first polymer-containing film including biaxially-oriented nylon, a second polymer-containing film including polyethylene, a third polymer-containing film including polyethylene, and a fourth polymer-containing film including co-extruded polyethylene, wherein the metal-containing film includes foil.

2. The abrasive tool of claim 1 , wherein the barrier layer comprises a polymer-containing film overlying the metal-containing film.

3. The abrasive tool of claim 2 , wherein the barrier layer comprises a perforation density across a surface of the barrier layer within a range of 0.1 perforations/cm 2 to 200 perforations/cm 2 .

4. The abrasive tool of claim 1 , wherein at least one of the first, second, third, and fourth polymer-containing films is bonded directly to the metal-containing film.

5. The abrasive tool of claim 1 , wherein one of the first, second, third, and fourth polymer-containing films is bonded directly to the major surface of the body.

6. The abrasive tool of claim 1 , wherein the body comprises a first major surface and a second major surface opposite the first major surface, and a peripheral surface extending between the first major surface and the second major surface, and wherein the barrier layer is bonded directly to the first major surface and second major surface.

7. The abrasive tool of claim 6 , wherein the barrier layer overlies at least a portion of the peripheral surface.

8. The abrasive tool of claim 1 , wherein the metal-containing film is in direct contact with the major surface of the body.

9. The abrasive tool of claim 1 , wherein the first polymer-containing film is an outermost layer of the barrier layer facing away from the body, the forth polymer-containing film is an innermost layer in contact with the major surface of the body, and the metal-containing film is disposed between the second and third polymer-containing films.

10. An abrasive tool comprising:
a bonded abrasive including a body comprising:
abrasive particles contained within a bond material;
a first major surface and a second major surface opposite the first major surface; and
a peripheral surface extending between the first major surface and the second major surface,

wherein a barrier layer is bonded directly to the first major surface and the second major surface; and
wherein the barrier layer comprises a metal-containing film, a first polymer-containing film including a biaxially-oriented material, a second polymer-containing film, and a third polymer-containing film including polyethylene,
wherein the metal containing film is disposed between the second and the third polymer-containing films.

11. The abrasive tool of claim 10 , wherein the first polymer-containing film including the biaxially-oriented material is an outermost layer of the barrier layer, and the third polymer-containing film is an innermost layer of the barrier layer.

12. A method of forming an abrasive article comprising:
forming a barrier layer in-situ with the formation of a bonded abrasive including a body comprising abrasive particles contained within a bond material comprising an organic material,
the barrier layer comprising a metal-containing film and further comprising a first polymer-containing biaxially-oriented nylon, a second polymer-containing film including polyethylene, a third polymer-containing film including polyethylene, and a fourth polymer-containing film including co-extruded polyethylene, wherein the metal-containing film includes foil.

13. The method of claim 12 , wherein the barrier layer is adhered to a major surface of the body while the bond material is curing.

14. The method of claim 12 , wherein the barrier layer is bonded directly to a major surface of the body using a hot pressing operation used to form the bonded abrasive body.

15. The method of claim 12 , wherein the barrier layer is integrally bonded to the major surface during a cold pressing operation, or wherein the barrier layer is integrally bonded to the major surface during curing of the bond material of the bonded abrasive.

16. The method of claim 12 , wherein the barrier layer is applied during a hot pressing operation applying a force within a range between 40 tons and 2000 tons.

17. The abrasive tool of claim 10 , wherein the biaxially-oriented material comprises nylon, polypropylene, or polyester.

18. The abrasive tool of claim 17 , wherein the biaxially-oriented material comprises polyethylene terephthalate, or wherein the biaxially-oriented material consists essentially of polyethylene terephthalate.

19. The abrasive tool of claim 10 , wherein the second polymer-containing film comprises a polymer selected from the group consisting of a thermoplastic and a thermoset.

20. The abrasive tool of claim 19 , wherein the polymer is selected from the group consisting of polyamides, polyesters, polyethlyenes, polypropylene, polyvinyls, epoxies, resins, polyurethanes, rubbers, polyimides, phenolics, polybenzimidazole, aromatic polyamide, and a combination thereof.

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa
• Saint-Gobain Abrasives Inc /Saint-Gobain Abrasifs

Inventors

• Pacella Nan Y
• Lavallee Jr Lawrence J
• Montgomery Michael K
• Sahlin Katherine M

Classifications

• B24D3/005 Primary

  the constituent being used during pre- or after-treatment (B24D3/348 takes precedence) · CPC title

• B24D18/00 Primary

  Manufacture of grinding tools {or other grinding devices}, e.g. wheels, not otherwise provided for · CPC title

• B24D5/12

  Cut-off wheels · CPC title

• B24D3/001

  the constituent being used as supporting member · CPC title

• B24D7/02

  Wheels in one piece · CPC title