Coated abrasive backing
AssigneeMinnesota Mining and Manufacturing Company
InventorsGeorge M. Stout, James G. Homan, John R. Mlinar, Larry R. 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.
Claims23
A coated abrasive backing devoid of abrasive particles and having a working surface adapted to receive an abrasive coating comprising abrasive particles, the backing comprising:
- (a) a tough, heat resistant, thermoplastic binder material present in an amount of about 60 to about 99-wt% based upon the weight of the backing;
- and
- (b) an effective amount of a fibrous reinforcing material imparting stiffness, shape control and heat resistance to said backing is distributed throughout the tough, heat resistant, thermoplastic binder material;
- wherein the tough, heat resistant, thermoplastic binder material and fibrous reinforcing material together comprise a hardened composition that will not substantially deform or disintegrate under abrading conditions of at least 200.degree. C. and at least 7 kg/cm.sup.2 at the abrading interface during grinding and at least in portions of the backing having the abrasive particles attached thereto, the hardened composition defining the working surface.
A coated abrasive backing devoid of abrasive particles and having a working surface adapted to receive an abrasive coating comprising abrasive particles, the backing comprising:
- (a) about 60-99 wt-% of a tough, heat resistant thermoplastic binder material, based upon the weight of the backing, with a melting point of at least about 200.degree. C.;
- and
- (b) an effective amount of a fibrous reinforcing material imparting stiffness, shape control and heat resistance to said backing is distributed throughout the thermoplastic binder material;
- wherein said thermoplastic binder material and fibrous reinforcing material together comprise a flexible hardened composition that will not substantially deform or disintegrate under abrading conditions of at least 200.degree. C. and at least 7 kg/cm.sup.2 at the abrading interface during grinding and at least in portions of the backing having the abrasive particles attached thereto, the hardened composition defining the working surface.
A coated abrasive article comprising:
- (a) a backing having a working surface and a back surface, the working surface and the back surface devoid of abrasive particles, the working surface adapted to receive an abrasive coating comprising abrasive particles;
- wherein the backing comprises:
- (i) about 60-99 wt-% of a tough, heat resistant thermoplastic binder material based upon the total weight of the backing;
- (ii) an effective amount of a fibrous reinforcing material imparting stiffness, shape control and heat resistance to said backing is;
- and
- (iii) about 1-30 wt-% of a toughening agent based upon the total weight of the backing;
- wherein the thermoplastic binder material, fibrous reinforcing material, and toughening agent define a hardened mixture that will not substantially deform or disintegrate under abrading conditions of at least 200.degree. C. and at least 7 kg/cm.sup.2 at the abrading interface during grinding and at least in portions of the backing having the abrasive particles attached thereto, the hardened mixture defining the working surface;
- (b) a first adhesive layer applied to the working surface of the backing;
- (c) an abrasive material embedded into the first adhesive layer;
- and
- (d) a second adhesive layer applied to the abrasive material and first adhesive layer.
Dependencies are inferred from the claim text.