Coated abrasive article and process for producing the same
AssigneeMinnesota Mining and Manufacturing Company
InventorMichihiro Ohishi
Life of this patent
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Abstract
A coated abrasive product comprising a backing, a first adhesive layer formed on the backing, a layer of abrasive grains formed on the first adhesive layer, and a second adhesive layer covering the layer of abrasive grains, wherein the second adhesive layer is formed from a composition comprising a water soluble resol phenolic resin having a weight-average molecular weight of from 1,400 to 3,500 and an organic solvent having a boiling point of 110.degree. to 175.degree. C., and a process for producing the same. The present invention remarkably shortens a drying time of the second adhesive used in the production of the coated abrasive product of the present invention and improves productivity.
Claims2
A process for producing a coated abrasive article comprising the steps of:
- (a) applying a first adhesive on a backing to form a first adhesive layer;
- (b) applying a layer of abrasive grains on said first adhesive layer;
- (c) curing said first adhesive by heating;
- (d) applying a second adhesive over said first adhesive layer and said layer of abrasive grains to form a second adhesive layer;
- (e) curing said second adhesive layer by heating at a temperature of from 120.degree. to 160.degree. C. for from 1.5 to 3 minutes to form a coated abrasive article;
- (f) winding said coated abrasive article;
- and
- (g) post-curing said article at a temperature of from 60.degree. to 130.degree. C.;
- wherein said second adhesive layer is formed from a composition Comprising a water soluble resol phenolic resin having a weight-average molecular weight of from 1,400 to 3,500 and an organic solvent having a boiling point of from to 175.degree. C.
A process for producing a coated abrasive article comprising the steps of:
- (a) applying a first adhesive on a backing to form a first adhesive layer;
- (b) applying a layer of abrasive grains on said first adhesive layer;
- (c) curing said first adhesive by heating;
- (d) applying a second adhesive over said first adhesive layer and said layer of abrasive grains to form a second adhesive layer;
- (e) curing said second adhesive layer to form a coated abrasive article;
- (f) winding said coated abrasive article;
- and
- (g) post-curing said article at a temperature of from 60.degree. to 130.degree. C.;
- wherein said second adhesive layer is formed from a composition having a viscosity of 10,000 to 100,000 cps (25.degree. C.) at 75% solids and comprising a water soluble resol phenolic resin having a weight-average molecular weight of from 1,400 to 3,500 and an organic solvent having a boiling point of from 110.degree. to 175.degree. C.
Dependencies are inferred from the claim text.