Patent application number | Description | Published |
20090163127 | ABRASIVE ARTICLE HAVING A PLURALITY OF PRECISELY-SHAPED ABRASIVE COMPOSITES - An abrasive article comprising a sheet-like structure having a major surface and having deployed in a fixed position thereon a plurality of precisely-shaped abrasive composites in an area spacing. Each of the precisely-shaped abrasive composites comprising a plurality of abrasive particles dispersed in a binder and wherein the abrasive article has a Precisely-Shaped Abrasive Composite Defect Rate of between 0 percent to about 30 percent. | 06-25-2009 |
20090165394 | METHOD OF MAKING ABRASIVE SHARDS, SHAPED ABRASIVE PARTICLES WITH AN OPENING, OR DISH-SHAPED ABRASIVE PARTICLES - By controlling the process parameters and by using a polymeric production tooling having a plurality of mold cavities, different types of shaped abrasive particles selected from the group consisting of abrasive shards, dish-shaped abrasive particles, and shaped abrasive particles with an opening can be produced from the exact same mold. In one embodiment, the mold comprised a plurality of equilateral triangles and fractured precursor abrasive particles, dish-shaped precursor abrasive particles, or precursor shaped abrasive particles with an opening were produced from the same mold. | 07-02-2009 |
20090169816 | SHAPED, FRACTURED ABRASIVE PARTICLE, ABRASIVE ARTICLE USING SAME AND METHOD OF MAKING - Precursor alpha alumina abrasive particles in a mold are subjected to a drying process that cracks or fractures at least a majority of the precursor abrasive particles into at least two pieces thereby producing abrasive shards having a smaller size than the mold cavity from which they were made. The smaller abrasive shards, once formed, could be reassembled like jigsaw puzzle pieces to reproduce the original cavity shape of the mold from which they were made. The cracking or fracturing of the precursor abrasive particles is believed to occur by ensuring that the surface tension of the abrasive dispersion to the walls of the mold is greater than the internal attractive forces of the abrasive dispersion as the abrasive dispersion is dried within the mold cavity. | 07-02-2009 |
20100146867 | SHAPED ABRASIVE PARTICLES WITH GROOVES - Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face. | 06-17-2010 |
20100151195 | DISH-SHAPED ABRASIVE PARTICLES WITH A RECESSED SURFACE - Abrasive particles comprising dish-shaped abrasive particles each having a sidewall; each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t; and wherein either the first face or the second face is recessed or concave. | 06-17-2010 |
20100151196 | SHAPED ABRASIVE PARTICLES WITH A SLOPING SIDEWALL - Abrasive particles comprising shaped abrasive particles each having a sloping sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t. The shaped abrasive particles further comprising either: a draft angle α between the second face and the sloping sidewall, and the draft angle α is between about 95 degrees to about 130 degrees, or the sloping sidewall having a radius, R, between the first face and the second face and the radius, R, is between about 0.5 to about 2 times the thickness, t. | 06-17-2010 |
20100151201 | SHAPED ABRASIVE PARTICLES WITH AN OPENING - An abrasive comprising shaped abrasive particles each with an opening. The shaped abrasive particles are formed from alpha alumina and have a first face and a second face separated by a thickness t. The opening in each of the shaped abrasive particles can improve grinding performance by reducing the size of a resulting wear flat, can provide a reservoir for grinding aid, and can improve adhesion to a backing in a coated abrasive article. | 06-17-2010 |
20100255254 | PLASMA TREATED ABRASIVE ARTICLE AND METHOD OF MAKING SAME - An abrasive article, such as a structured abrasive article, can be treated by subjecting it to plasma whereby the outer surface can be eroded exposing at least a portion of the abrasive particles dispersed within a cross-linked binder forming the abrasive composites. Depending on the process conditions for the plasma treatment, it is possible to erode only a small portion or substantially all of the cross-linked binder from the outer surface. Thus, the initial cut-rate of the abrasive article can be controlled since it is possible to precisely control the degree, height, or area of the exposed abrasive particles. | 10-07-2010 |
20100266847 | PRECISELY-SHAPED POROUS PARTICLES - Precisely-shaped composites and methods for making these composites are disclosed. The method of this disclosure comprises introducing a precursor composition onto a production tool having at least one continuous surface and a plurality of cavities so as to fill at least a portion of the cavities with the precursor composition and wherein the precursor composition, upon curing, forms a composition having a shape corresponding to the cavities thereby resulting in a plurality of discrete, precisely-shaped particles having a porosity comprising one of the following: (a) 10 m | 10-21-2010 |
20110053460 | STRUCTURED ABRASIVE ARTICLE AND METHOD OF USING THE SAME - A structured abrasive article comprises a backing, and an abrasive layer disposed on and secured to the backing. The abrasive layer comprises shaped abrasive composites, each comprising abrasive particles dispersed in a binder. Each the shaped abrasive composites independently comprises: a base disposed on the backing; a plurality of walls extending away from the base, and a grinding surface not contacting the base. Adjacent walls share a common edge. Each wall independently forms a dihedral angle with the base of less than or equal to 90 degrees. The grinding surface has a plurality of: cusps, and facets that contact a recessed feature. At least a portion of the recessed feature is disposed closer to the base than each of the cusps. Each cusp is formed by an intersection of two of the walls and at least one of the facets. Use of the structured abrasive article to abrade a workpiece is also disclosed | 03-03-2011 |
20110065362 | STRUCTURED ABRASIVE ARTICLE AND METHOD OF USING THE SAME - A structured abrasive article includes a backing having a structured abrasive layer disposed on and secured thereto. The structured abrasive layer includes shaped abrasive composites that comprise abrasive particles and nonionic polyether surfactant dispersed in a crosslinked polymeric binder. The abrasive particles have a mean particle size of less than 10 micrometers. The nonionic polyether surfactant is not covalently bound to the crosslinked polymeric binder and is present in an amount of from 2.5 to 3.2 percent by weight based on a total weight of the shaped abrasive composites. The structured abrasive articles are useful for abrading a workpiece. | 03-17-2011 |
20110244769 | ABRASIVE ARTICLE HAVING A PLURALITY OF PRECISELY-SHAPED ABRASIVE COMPOSITES - A method of making an abrasive article including the steps of treating a plurality of cavities in a contacting surface of a production tool by plasma deposition of a thin film thereby forming a plurality of plasma treated cavities. Filling the plurality of plasma treated cavities in the production tool with an abrasive slurry, and at least partially curing the abrasive slurry while residing in the plurality of cavities. | 10-06-2011 |
20110314746 | SHAPED, FRACTURED ABRASIVE PARTICLE, ABRASIVE ARTICLE USING SAME AND METHOD OF MAKING - Precursor alpha alumina abrasive particles in a mold are subjected to a drying process that cracks or fractures at least a majority of the precursor abrasive particles into at least two pieces thereby producing abrasive shards having a smaller size than the mold cavity from which they were made. The smaller abrasive shards, once formed, could be reassembled like jigsaw puzzle pieces to reproduce the original cavity shape of the mold from which they were made. The cracking or fracturing of the precursor abrasive particles is believed to occur by ensuring that the surface tension of the abrasive dispersion to the walls of the mold is greater than the internal attractive forces of the abrasive dispersion as the abrasive dispersion is dried within the mold cavity. | 12-29-2011 |
20120137597 | SHAPED ABRASIVE PARTICLES WITH A SLOPING SIDEWALL - Abrasive particles comprising shaped abrasive particles each having a sloping sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t. The shaped abrasive particles further comprising a draft angle α between the second face and the sloping sidewall, and the draft angle α is between about 95 degrees to about 125 degrees. | 06-07-2012 |
20120144754 | DISH-SHAPED ABRASIVE PARTICLES WITH A RECESSED SURFACE - Abrasive particles comprising dish-shaped abrasive particles each having a sidewall; each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a thickness, t; and wherein either the first face or the second face is recessed or concave. | 06-14-2012 |
20120144755 | SHAPED ABRASIVE PARTICLES WITH AN OPENING - An abrasive comprising shaped abrasive particles each with an opening. The shaped abrasive particles are formed from alpha alumina and have a first face and a second face separated by a thickness t. The opening in each of the shaped abrasive particles can improve grinding performance by reducing the size of a resulting wear flat, can provide a reservoir for grinding aid, and can improve adhesion to a backing in a coated abrasive article. | 06-14-2012 |
20120258652 | ROTARY BUFFING PAD - Provided is a flat-faced buffing pad that includes a plurality of apertures of variable size. The apertures are generally larger in the areas toward the center of the pad, while being generally smaller in the areas toward the periphery of the pad. Some embodiments further include apertures disposed along one or more concentric circular rings located along the front surface and generally symmetrical about the rotation axis. These configurations of apertures provide both superior cut performance and superior finish. Moreover, these configurations minimize several undesirable aspects in a polishing operation, such as slinging of the polishing compound, vibration, wobbling, and drag felt by the operator as the rotary pad slides across the surface to be polished. | 10-11-2012 |
20140109490 | METHOD OF MAKING CERAMIC SHAPED ABRASIVE PARTICLES, SOL-GEL COMPOSITION, AND CERAMIC SHAPED ABRASIVE PARTICLES - A method includes: providing a mold having a plurality of mold cavities, wherein each mold cavity is bounded by a plurality of faces joined along common edges; filling at least some of the mold cavities with a sol-gel composition that includes a release agent dispersed therein; at least partially drying the sol-gel composition thereby forming shaped ceramic precursor particles; calcining at least a portion of the shaped ceramic precursor particles to provide calcined shaped ceramic precursor particles; and sintering at least a portion of the calcined shaped ceramic precursor particles to provide ceramic shaped abrasive particles. A sol-gel composition, shaped ceramic precursor particles, and ceramic shaped abrasive particles associated with practice of the method are also disclosed. | 04-24-2014 |
20140212626 | METHOD OF MAKING INORGANIC, METAL OXIDE SPHERES USING MICROSTRUCTURED MOLDS - A process for making inorganic, metal oxide spheres that includes exposing solidified, molded microparticles that include a glass precursor composition to a temperature sufficient to transform the molded microparticles into molten glass and cooling the molten glass to form inorganic, metal oxide spheres. | 07-31-2014 |
20140237907 | ABRASIVE ARTICLE WITH SHAPED ABRASIVE PARTICLES WITH GROOVES - Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face. | 08-28-2014 |
20140239148 | PRODUCTION TOOL TO MAKE ABRASIVE PARTICLES WITH GROOVES - Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face. | 08-28-2014 |