Abrasive tools and methods for forming same

Patent metadata

Field	Value
Publication number	US-10189145-B2
Application number	US-201615395581-A
Country	US
Kind code	B2
Filing date	Dec 30, 2016
Priority date	Dec 30, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

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 polymer including a biaxially-oriented material. In an embodiment, the barrier layer may include a polymer-containing film as an exterior surface of the abrasive tool. 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 polymer including a biaxially-oriented material.

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

3. The abrasive tool of claim 2 , wherein the barrier layer comprises a tie layer disposed between the metal-containing film and the polymer-containing film.

4. The abrasive tool of claim 3 , wherein the tie layer comprises an adhesive.

5. The abrasive tool of claim 1 , wherein the barrier layer comprises a sealant layer adjacent the body.

6. The abrasive tool of claim 5 , wherein the sealant layer comprises a polyethylene based material.

7. The abrasive tool of claim 5 , wherein the sealant layer comprises a linear low density polyethylene based material.

8. The abrasive tool of claim 2 , wherein the polymer-containing layer comprises polyethylene terephthalate or nylon.

9. The abrasive tool of claim 2 , wherein the polymer-containing layer consists essentially of biaxially-oriented polyethylene terephthalate or biaxially-oriented nylon.

10. The abrasive tool of claim 2 , wherein the polymer-containing film consists of the biaxially-oriented material and is an exterior surface of the abrasive tool.

11. 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.

12. The abrasive tool of claim 1 , further comprising a reinforcement layer disposed between the body and the barrier layer, wherein the reinforcement layer comprises a material selected from the group consisting of a fabric, a fiber, a film, a woven material, a non-woven material, a glass, a fiberglass, a ceramic, a polymer, a resin, a polymer, a fluorinated polymer, an epoxy resin, a polyester resin, a polyurethane, a polyester, a rubber, a polyimide, a polybenzimidazole, an aromatic polyamide, a modified phenolic resin, and a combination thereof.

13. The abrasive tool of claim 12 , wherein the barrier layer is directly bonded to the reinforcement layer.

14. The abrasive tool of claim 1 , wherein the barrier layer comprises a polymer-containing film, a first tie layer, a metal-containing film, a second tie layer, and a sealant layer, wherein the sealant layer is adjacent the body and the polymer-containing film is an exterior surface of the abrasive tool.

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

16. The abrasive tool of claim 15 , wherein the polymer-containing film consists of biaxially-oriented nylon or biaxially-oriented polyethylene terephthalate.

17. A method of forming an abrasive article comprising:
forming a mixture comprising abrasive particles and a bond precursor material comprising an organic material;
forming the mixture into a green body; and
joining a barrier layer construction to the green body while forming the mixture into the green body, the barrier layer construction comprising a barrier layer,
wherein the bonded abrasive article comprises a bonded body comprising abrasive particles contained within a bond material and the barrier layer bonded to at least a major surface of the body, the barrier layer comprising a polymer including a biaxially-oriented material.

18. The method of claim 17 , wherein the barrier layer construction comprises a reinforcement portion attached to the barrier layer.

19. The method of claim 18 , comprising:
curing the green body to form the bonded body; and
bonding the barrier layer construction to the bonded body during curing of the green body.

20. The abrasive tool of claim 16 , wherein the barrier layer comprises a tie layer disposed between the polymer-containing film and the metal foil, and further comprises a sealant layer adjacent the body, wherein the polymer-containing film is an exterior surface of the abrasive tool.

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

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

Classifications

• B24D18/00

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

• B24D7/04

  with reinforcing means · CPC title

• B24D3/28 Primary

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

• B24D3/004

  with special coatings · CPC title

• B24D5/04

  with reinforcing means · CPC title