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1. (US20190202032) NONWOVEN ABRASIVE ARTICLE INCLUDING ABRASIVE PARTICLES
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Claims

1. A nonwoven abrasive article comprising:
a nonwoven web comprising first fibers having a first diameter and second fibers having a second diameter; and
abrasive particles distributed throughout at least a portion of the nonwoven web; wherein the first fibers have a denier of at least about 1 and no greater than about 10, the second fibers have a denier of at least about 10,
the first fibers are at least about 10 wt % and no greater than about 50 wt % of the fibers in the nonwoven web, and
the second fibers are at least about 50 wt % and no greater than about 90 wt % of the fibers in the nonwoven web.
2. The nonwoven abrasive article of claim 1, wherein at least a portion of the abrasive particles comprise one or more substantially flat faces.
3. The nonwoven abrasive article of claim 2, wherein the substantially flat face is contacted by one or more of the fibers of the nonwoven web that are substantially parallel to the flat face.
4. The nonwoven abrasive article of claim 2, wherein each of the substantially flat faces is independently contacted by one or more of the fibers of the nonwoven web that are substantially parallel to the respective flat face.
5. The nonwoven abrasive article of claim 2, wherein the abrasive particles have a particle size of about 10 microns to about 750 microns.
6. The nonwoven abrasive article of claim 5, wherein the abrasive particles have a particle size of 30 microns to about 150 microns.
7. The nonwoven abrasive article of claim 2, wherein the abrasive particles are shaped abrasive particles.
8. The nonwoven abrasive article of claim 7, wherein the shaped abrasive particle comprising a perimeter that is polygonal.
9. The nonwoven abrasive article of claim 7, wherein the shaped abrasive particle comprises a perimeter that is triangular, rectangular, circular, elliptical, trapezoidal, pentagonal, or star-shaped.
10. The nonwoven abrasive article of claim 1, further comprising a binder adhering the abrasive particles to the fibers of the nonwoven web.
11. The nonwoven abrasive article of claim 1, comprising one or more compressed bonded layers of the nonwoven web.
12. The nonwoven abrasive article of claim 1, wherein the nonwoven abrasive article is a unitized abrasive wheel.
13. The nonwoven abrasive article of claim 1, wherein a 6.0-inch (15.2-cm) diameter 0.5-inch (1.27-cm) width test wheel having the same composition as the nonwoven abrasive article tested on ⅛-inch diameter carbon steel over 30 minutes, using 8 pounds (3.63 kg) of force, at 3600 rotations per minute, 15 seconds on and 15 seconds off, has a wear of about 1 g to about 20 g of the test wheel.
14. The nonwoven abrasive article of claim 1, wherein a 6.0-inch (15.2-cm) diameter 0.5-inch (1.27-cm) width test wheel having the same composition as the nonwoven abrasive article tested on ⅛-inch (0.32-cm) diameter carbon steel over 30 minutes, using 8 pounds (3.63 kg) of force, at 3600 rotations per minute, 15 seconds on and 15 seconds off, cuts about 10 g to about 100 g of the carbon steel.
15. The nonwoven abrasive article of claim 1, wherein the nonwoven abrasive article has a density of about 3 g/in 3 to about 23 g/in 3.
16. A method of making the nonwoven abrasive article of claim 1, the method comprising:
forming a prebond comprising a resin and the fibers;
coating the abrasive particles onto the prebond;
compressing the coated prebond; and
curing the compressed prebond, thereby forming the nonwoven abrasive article of claim 1.
17. A nonwoven abrasive article comprising:
a nonwoven web comprising fibers and pores between the fibers; and
abrasive particles, at least a portion of the pores between the fibers independently comprising one or more of the abrasive particles;
wherein
each of the pores is independently about the same size as the one or more abrasive particles therein,
a 6.0-inch (15.2-cm) diameter 0.5-inch (1.27-cm) width test wheel having the same composition as the nonwoven abrasive article tested on ⅛-inch (0.32-cm) diameter carbon steel over 30 minutes, using 8 pounds (3.63 kg) of force, at 3600 rotations per minute, 15 seconds on and 15 seconds off, has a wear of about 2 g to about 5 g of the test wheel,
a 6.0-inch (15.2-cm) diameter 0.5-inch (1.27-cm) width test wheel having the same composition as the nonwoven abrasive article tested on ⅛-inch (0.32-cm) diameter carbon steel over 30 minutes, using 8 pounds (3.63 kg) of force, at 3600 rotations per minute, 15 seconds on and 15 seconds off, has a cut of the carbon steel of about 30 g to about 50 g, and
the nonwoven abrasive article has a density of about 3 g/in 3 to about 23 g/in 3.
18. The nonwoven abrasive article of claim 17, wherein the fibers include first fibers having a first diameter and second fibers having a second diameter different from the first diameter, and further wherein the first fibers have a denier of at least about 1 and no greater than about 10, the second fibers have a denier of at least about 10 and no greater than about 70, the first fibers are at least about 10 wt % and no greater than about 50 wt % of the fibers in the nonwoven web, and the second fibers are at least about 50 wt % and no greater than about 90 wt % of the fibers in the nonwoven web.