| US 7,491,251 B2 | ||
| Method of making a structured abrasive article | ||
| Dennis G. Welygan, Woodbury, Minn. (US); Kyongcheol Lee, Woodbury, Minn. (US); and Louis S. Moren, Mahtomedi, Minn. (US) | ||
| Assigned to 3M Innovative Properties Company, St. Paul, Minn. (US) | ||
| Filed on Oct. 05, 2005, as Appl. No. 11/243,757. | ||
| Prior Publication US 2007/0074455 A1, Apr. 05, 2007 | ||
| Int. Cl. B24D 18/00 (2006.01) | ||
| U.S. Cl. 51—298 [51/307; 51/308; 51/309; 51/293; 51/295; 51/297; 427/372.2; 427/355; 427/375; 427/379; 427/384; 427/256; 427/261] | 16 Claims |
| 1. A method of making an abrasive product, the method comprising:
a) providing a substantially horizontally deployed backing;
b) providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder precursor, wherein
the abrasive particles have an average particle size of 45 microns or less;
c) depositing a layer of the dry flowable particle mixture onto the backing;
d) sintering at least a portion of the layer of the dry flowable particle mixture to provide a cohesive layer wherein adjacent
abrasive particles are adhered to one another by the curable binder precursor;
e) compacting the cohesive layer to provide a compacted layer;
f) at least one of embossing or at least partially cutting the compacted layer to provide curable shaped structures having
a distal end spaced from the backing and an attachment end adhered to the backing; and
g) at least partially curing the curable binder precursor to form shaped abrasive structures comprising abrasive particles
and a binder, the shaped abrasive structures being affixed to the backing.
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