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US 5,975,988 AGranted
Coated abrasive article, method for preparing the same, and method of using a coated abrasive article to abrade a hard workpiece
AssigneeMinnesota Mining and Manfacturing Company
InventorTodd J. Christianson
Life of this patent
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Abstract
A coated abrasive having a backing and an abrasive layer coated on the first major of the backing, wherein a cross-section of the abrasive layer normal to the thickness and at a center point of the thickness has a total cross-sectional area of abrasive agglomerates which is substantially the same as that at a point along the thickness which is 75% of a distance the same as that at a point and the contact side; a coated abrasive article having a bond system with a Knoop hardness number of at least 70; a coated abrasive article comprising abrasive agglomerates in the shape of a truncated four-sided pyramid; a method of making the coated abrasive article; and a method of abrading a hard workpiece using a coated abrasive article.
Claims33
A coated abrasive article comprising:
- (a) a low stretch backing having a first major surface;
- and
- (b) an abrasive layer coated on the first major surface, the abrasive layer having a contact side adhered to the first major surface, an opposite side, and a thickness which extends from the contact side to the opposite side, the abrasive layer comprising
- (i) an organic-based bond system, and
- (ii) a plurality of abrasive agglomerates adhered in the bond system, each of the agglomerates
- (1) comprising an inorganic binder and a plurality of abrasive grains, wherein the inorganic binder has a coefficient of thermal expansion which is the same or substantially the same as a coefficient of thermal expansion of the plurality of abrasive grains, and
- (2) having a substantially uniform size and shape,
- wherein a cross-section of the abrasive layer normal to the thickness and at a center point of the thickness has a total cross-sectional area of abrasive agglomerates which is substantially the same as that at a point along the thickness which is 75% of a distance between the center point and the contact side.
5 more elements
A method of making a coated abrasive article comprising:
- (a) providing a low stretch backing having a first major surface;
- (b) forming an abrasive layer, the abrasive layer having a contact side adhered to the first major surface of the backing, an opposite side, and a thickness which extends from the contact side to the opposite side, wherein a cross-section of the abrasive layer normal to the thickness and at a center point of the thickness has a total cross-sectional area of abrasive agglomerates which is substantially the same as that at a point along the thickness which is 75% of a distance between the center point and the contact side, comprising:
- (1) applying a make coat comprising a first organic-based binder precursor to the first major surface of the backing;
- (2) providing a plurality of abrasive agglomerates
- (i) comprising an inorganic binder and a plurality of abrasive grains, wherein the inorganic binder has a coefficient of thermal expansion which is the same or substantially the same as a coefficient of thermal expansion of the plurality of abrasive grains, and
- (ii) having a substantially uniform size and shape;
- (3) distributing the agglomerates in the make coat;
- (4) exposing the make coat to an energy source to at least partially cure the first binder precursor;
- (5) applying a size coat comprising a second organic-based binder precursor on the abrasive agglomerates;
- and
- (6) exposing the size coat to a second energy source to cure the second binder precursor and, optionally, to complete curing of the first binder precursor.
8 more elements
A coated abrasive article comprising:
- (1) a low stretch backing having a first major surface;
- and
- (2) an abrasive layer coated on the first major surface, the abrasive layer comprising:
- (a) an organic-based bond system, and
- (b) a plurality of abrasive agglomerates distributed in the bond system, each of the agglomerates comprising an inorganic binder and a plurality of abrasive grains and being in the shape of a truncated four-sided pyramid or a cube, wherein the inorganic binder has a coefficient of thermal expansion which is the same or substantially the same as a coefficient of thermal expansion of the plurality of abrasive grains.
2 more elements
A coated abrasive article comprising:
- (1) a low stretch backing having a first major surface;
- and
- (2) an abrasive layer coated on the first major surface, the abrasive layer comprising:
- (a) an organic-based bond system, the bond system comprising a binder and inorganic filler particles and having an average Knoop hardness number of at least 70, and
- (b) a plurality of abrasive agglomerates distributed in the bond system, each of the agglomerates comprising an inorganic binder and a plurality of abrasive grains, wherein the inorganic binder has a coefficient of thermal expansion which is the same or substantially the same as a coefficient of thermal expansion of the plurality of abrasive grains.
2 more elements
A coated abrasive article, comprising:
- a) a low stretch cloth backing having a first major surface;
- b) an abrasive layer coated on the first major surface, the abrasive layer having a contact side adhered to the first major surface, an opposite side, and a thickness which extends from the contact side to the opposite side, the abrasive layer comprising:
- i) an organic based bond system having a Knoop hardness greater than about 70, comprising a phenolic binder and filler particles;
- and
- ii) a plurality of abrasive agglomerates adhered in the bond system, each of the agglomerates comprising an inorganic binder and a plurality of abrasive grains;
- wherein the coated abrasive article is a coated abrasive belt.
3 more elements
Dependencies are inferred from the claim text.