Coated abrasive containing erodable agglomerates

Details Coated abrasive containing erodable agglomerates Coated abrasive containing erodable agglomerates

B - Operations, Transporting

24

D

B24D 11/00 (2006.01) B24D 3/28 (2006.01) C09K 3/14 (2006.01)

Patent

CA 2051607

44907 CAN 1A ABSTRACT OF THE DISCLOSURE This invention relates to coated abrasives, and, more particularly, to coated abrasive products containing erodable agglomerates. Conventional coated abrasives typically consist of a single layer of abrasive grain adhered to a backing. It has been found that only up to about 15% of the grains in the layer are actually utilized in removing any of the workpiece. It has long been known that a coated abrasive containing an underlayer of conventional aluminum oxide grains and a top layer of individual premium abrasive grains provides satisfactory performance at a lower cost than a coated abrasive using 100% individual premium abrasive grains. However, for certain grinding applications, the conventional abrasive grains prevent maximum utilization of the individual premium abrasive grains that are randomly distributed between the conventional grains. This invention provides a coated abrasive product comprising a backing bearing on at least one major surface thereof a make coat, a multiplicity of erodable agglomerates comprising a resinous binder and at least one inorganic filler material adhered to said make coat, a multiplicity of individual premium abrasive grains adhered to said make coat and disposed between said erodable agglomerates, a multiplicity of individual premium abrasive grains overlying said erodable agglomerates, and a size coat overlying said individual premium abrasive grains, said erodable agglomerates, and said make coat. The coated abrasive products of this invention abrade faster and endure longer than coated abrasive products using individual conventional abrasive grains in place of erodable agglomerates.

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