Coated abrasive backing
AssigneeMinnesota Mining and Manufacturing Company
InventorsGeorge Matthew Stout, James Gerard Homan, John Russell Mlinar, Larry Ray Wright
Life of this patent
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Abstract
The present invention provides a backing for a coated abrasive article, wherein the backing includes a tough, heat resistant, thermoplastic binder material, and an effective amount of a fibrous reinforcing material distributed throughout the thermoplastic binder material. The tough, heat resistant, thermoplastic binder material and the fibrous reinforcing material together form a hardened composition that will not substantially deform or disintegrate during use.
Claims21
A coated abrasive article, comprising:
- (a) a backing having a front surface comprising a mixture or blend of:
- (i) a thermoplastic binder material;
- (ii) a fibrous reinforcing material;
- and
- (iii) a toughening agent;
- (b) a first adhesive layer present on the front surface of the backing;
- and
- (c) a plurality of abrasive particles embedded in the first adhesive layer.
A coated abrasive article, comprising:
- (a) a backing having a front surface comprising a mixture or blend of:
- (i) a thermoplastic binder material;
- (ii) a fibrous reinforcing material, wherein the fibrous reinforcing material comprises individual fibrous strands and a fibrous mat;
- (b) a first adhesive layer present on the front surface of the backing;
- and
- (c) a plurality of abrasive particles embedded in the first adhesive layer.
A method of making a coated abrasive article comprising a hardened backing;
- said method comprising:
- (a) placing a mat comprising fibrous reinforcing material into a mold;
- (b) injection molding a thermoplastic binder material to fill the spaces between the reinforcing fibers in the mat to form a shaped object;
- (c) cooling and solidifying the shaped object to form the hardened backing for the coated abrasive article;
- (d) applying a layer or and adhesive to the hardened backing;
- and
- (e) applying a layer of abrasive material to the layer of adhesive.
Dependencies are inferred from the claim text.