Coated abrasive backing
AssigneeMinnesota Mining and Manufacturing Company
InventorsGeorge M. Stout, James G. Homan, John R. Mlinar, Larry R. Wright
Life of this patent
Estimating the term…
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.
Claims19
A method of making a coated abrasive article comprising a hardened backing;
- said method comprising:
- (a) combining and heating, a tough, heat resistant, thermoplastic binder material and a fibrous reinforcing material to form a softened, moldable, mixture, wherein the fibrous reinforcing material is distributed throughout the tough, heat resistant, thermoplastic binder and is present in the softened, moldable, mixture in an amount effective to improve heat resistance, toughness, flexibility, and/or shape control of the hardened backing;
- (b) forming a shaped object out of the softened, moldable, mixture;
- (c) cooling and solidifying the shaped object to form the hardened backing for the coated abrasive article;
- the hardened backing being capable of withstanding conditions during use such that the hardened backing will not substantially deform or disintegrate;
- (d) applying a layer of an adhesive to the hardened backing;
- and
- (e) applying a layer of abrasive material to the layer of adhesive.
A method of making a coated abrasive article comprising a hardened backing;
- said method comprising:
- (a) combining and heating 60 to 99% of a tough, heat resistant, thermoplastic binder material and 1 to 40% of a fibrous reinforcing material, based on the weight of the backing, to form a softened, moldable, mixture, wherein the fibrous reinforcing material is distributed throughout the tough heat resistant, thermoplastic binder;
- (b) forming a shaped object out of the softened, moldable, mixture;
- (c) cooling and solidifying the shaped object to form the hardened backing for the coated abrasive article;
- the hardened backing being capable of withstanding conditions during use such that the hardened backing will not substantially deform or disintegrate;
- (d) applying a layer of an adhesive to the hardened backing;
- and
- (e) applying a layer of abrasive material to the layer of adhesive.
A method of making a coated abrasive article comprising a hardened backing;
- said method comprising:
- (a) combining and heating a tough, heat resistant, thermoplastic binder material and a fibrous reinforcing material to form a softened, moldable, mixture, wherein the fibrous reinforcing material is distributed throughout the tough, heat resistant, thermoplastic binder and is present in the softened, moldable, mixture in an amount effective to improve heat resistance, toughness, flexibility, and/or shape control of the hardened backing;
- (b) extruding the softened, moldable, mixture into a sheet or web form;
- (c) cooling and solidifying the sheet or web to form the hardened backing for the coated abrasive article;
- the hardened backing being capable of withstanding conditions during use such that the hardened backing will not substantially deform or disintegrate;
- (d) applying a layer of an 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.