ABRASIVE ARTICLE HAVING A CORE INCLUDING A POLYMER MATERIAL

• US 20150343601A1
• Filed: 05/29/2015
• Published: 12/03/2015
• Est. Priority Date: 05/29/2014
• 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), Saint-Gobain Abrasifs (Compagnie de Saint-Gobain SA)
• Inventors: ROY, Debdutta, TUNSTALL, John, KHAUND, Arup K., SEREBRENNIKOV, Boris L.
• Granted Patent: US 9,764,449 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B24D 18/0009 using moulds or presses
• CPC Class Codes: B24D 5/06 with inserted abrasive blocks, e.g. segmental

Abstract

An abrasive article in form of an abrasive wheel comprising a core and a bonded abrasive body disposed within an interior recess of a peripheral surface of a core. The core comprises a polymer material and has an HDT at 0.45 MPa of at least about 130° C., and a low shrinkage ratio.

Claims

1. An abrasive article, comprising:

a bonded abrasive body disposed within an interior recess of a peripheral surface of a core, wherein the core comprises a polymer material and reinforcing fibers, and wherein the core has an HDT at 0.45 MPa of at least about 130°

C. and a shrinkage ratio of not greater than 3%.

2. The abrasive article of claim 1, wherein the core has a shrinkage ratio of not greater than 0.1.

3. The abrasive article of claim 1, wherein the core has a tensile modulus of at least about 20.0 GPa.

4. The abrasive article of claim 1, wherein the polymer material includes at least one of a polyamide (PA), a polybutylene terephthalate (PBT), a polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), a polyetherketone (PEEK), a polyester (PE), a polyethyleneimine (PEI), a polyethersulfone (PESU), a polyethylene terephthalate (PET), a polyphthalamide (PPA), a poly (p-phenylene sulfide), a polycarbonate (PC), an acrylonitrile-butadiene-styrene (ABS), a PC-ABS, or any combination thereof.

5. The abrasive article of claim 1, wherein the reinforcing fibers including glass fibers, carbon fibers, ceramic fibers, organic fibers, mineral fibers, and combinations thereof.

6. The abrasive article of claim 5, wherein the reinforcing fibers include glass fibers or carbon fibers.

7. The abrasive article of claim 1, wherein the reinforcing fibers have an aspect ratio of length to width of 10 to 5000.

8. The abrasive article of claim 1, wherein the core consists essentially of the polymer material and the reinforcing fibers, the reinforcing fibers being present in an amount of 20 to 50 wt % based on the total weight of the core and having an average aspect ratio of length to width of 500 to 1200.

9. The abrasive article of claim 8, wherein the polymer material includes PPS or PC-ABS.

10. The abrasive article of claim 1, further comprising a vibration damping layer disposed between at least a portion of the core and a portion of the bonded abrasive body, wherein the vibration damping layer has a tensile modulus of at least 50.

11. The abrasive article of claim 1, wherein the article is an abrasive wheel configured for shaping glass.

12. The abrasive wheel of claim 11, wherein the abrasive wheel has a burst strength of at least 150 m/s.

13. The abrasive article of claim 1, wherein the core further comprises an inner portion and an outer radial portion disposed circumferentially around the periphery of the inner portion, wherein the outer radial portion comprises a thickness (T_or) different than a thickness of the inner portion (T_ir).

14. An abrasive article, comprising:

a bonded abrasive body disposed within an interior recess of a peripheral surface of a core, wherein the core comprises a polymer material and reinforcing fibers, the reinforcing fibers having an average aspect ratio of length to width ranging from at least 10 to not greater than 5000.

15. The abrasive article of claim 14, wherein the core has a tensile modulus of at least 20 GPa and a shrinkage ratio of not greater than 0.1%.

16. The abrasive article of claim 15, wherein the core consists essentially of the polymer material and the reinforcing fibers, the reinforcing fibers being present in an amount of 20 to 50 wt % based on the total weight of the core and having an average aspect ratio of length to width of 500 to 1200.

17. The abrasive article of claim 16, wherein the polymer material includes PPS or PC-ABS.

18. A method of making an abrasive wheel, comprising:

inserting a bonded abrasive body into a mold; and

injection molding a core around at least a portion of the bonded abrasive body to form an integrally bonded abrasive article, wherein

the core comprises a polymer material and has an HDT at 0.45 MPa of at least 130°

C. and a shrinkage ratio of not greater than 3%; and

the bonded abrasive body is disposed within an interior recess of a peripheral surface of the core.

19. The method of claim 18, wherein the polymer material includes at least one a polyamide (PA), a polybutylene terephthalate (PBT), a polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), a polyetherketone (PEEK), a polyester (PE), a polyethyleneimine (PEI), a polyethersulfone (PESU), a polyethylene terephthalate (PET), a polyphthalamide (PPA), a poly (p-phenylene sulfide), a polycarbonate (PC), an acrylonitrile-butadiene-styrene (ABS), a PC-ABS, or any combination thereof.

20. The method of claim 18, wherein the core further comprises reinforcing fibers including glass fibers, carbon fibers, ceramic fibers, organic fibers, mineral fibers, or combinations thereof, and wherein the reinforcing fibers have a primary aspect ratio of length to width in a range of 10 to 5000.