| 摘要 |
This invention relates to abrasive grains, and, more particularly, abrasive grains having a particular shape and size. Three basic technologies that can be employed in the production of shaped abrasive materials suitable for use as abrasive grains are fusion, sintering, and chemical ceramic. However, it is not known whether any particular shape or size of abrasive grains would provide enhanced properties with respect to abrading. This invention provides abrasive grains having a shape such that the mean particle volume ratio thereof is less than about 0.8, and preferably ranges from about 0.3 to about 0.7. Typically, the grains have the shape of a thin platelet, the average thickness of which must be no greater than about 460 micrometers. The abrasive grains of this invention can be used in coated abrasive products, bonded abrasive products, nonwoven abrasive products, and abrasive brushes. The products made with the grains of this invention exhibit higher initial cut and higher total cut, along with lower grinding forces than do products having equivalent weight loadings of conventional abrasive grains. |
