Granted Patent B2

US 7,497,884 · App. 11/027,241 · Granted Mar 3, 2009

Abstract

Claims (22)

1. A method of making an abrasive paper comprising an abrasive backing having a smooth surface comprising the steps of:

providing a paper having a first paper surface and a second paper surface;

applying a first synthetic polymeric layer comprising a first synthetic polymeric composition to the first paper surface;

thereafter applying a second synthetic polymeric layer comprising a second synthetic polymeric composition to the first synthetic polymeric layer;

supercalendering the abrasive backing to form a smooth surface on the second polymeric layer; and

applying a layer of uniformly distributed abrasive particles to the second synthetic polymeric layer.

2. The method of claim 1 , wherein the smooth surface exhibits a Bekk Smoothness greater than about 100.

3. The method of claim 1 , wherein the smooth surface exhibits a Bekk Smoothness greater than about 1000.

4. The method of claim 1 , further comprising the step of applying an amorphous, rubbery polymer film layer to the second paper surface.

5. The method of claim 4 , wherein the amorphous rubbery polymer film layer is produced from melt-extrusion, extrusion casting or a preformed film and is selected from the group consisting of polyester elastomers and amorphous rubbery polypropylene.

6. The method of claim 1 , wherein the paper is a polymer-reinforced paper.

7. The method of claim 1 , wherein the paper is saturated with a nitrile-butadiene rubber latex.

8. The method of claim 1 , wherein the abrasive particles average less than about 6 microns in size.

9. The method of claim 1 , wherein the layer of abrasive particles is bonded to the second synthetic polymeric composition by means of a layer of an adhesive.

10. The method of claim 1 , in which the layer of abrasive particles is coated with a layer of an adhesive.

11. The method of claim 1 , wherein the first synthetic polymeric composition comprises nitrile and polyvinyl chloride lattices.

12. The method of claim 1 , wherein the second synthetic polymeric composition comprises nitrile and polyvinyl chloride lattices.

13. The method of claim 1 , wherein the basis weight of the second layer is less than about half the basis weight of the first layer.

14. A fine grit abrasive paper, having an abrasive backing comprising a paper having first and second surfaces, a first layer comprising a first synthetic polymer composition contacting the first surface of the paper, a second layer applied thereafter comprising a second synthetic polymer composition, the second layer contacting the first layer and comprising a smooth exterior surface that exhibits a Bekk Smoothness greater than about 100.

15. The fine grit abrasive paper of claim 14 , wherein the smooth surface exhibits a Bekk Smoothness greater than about 1000.

16. A fine grit abrasive paper comprising an abrasive backing comprising a paper having first and second surfaces, a first layer comprising a first synthetic polymer composition contacting the first surface of the paper, a second layer comprising a second synthetic polymer composition, wherein the second layer contacts the first layer and comprises a smooth exterior surface exhibiting a Bekk Smoothness greater than about 1000, and a layer of fine grit abrasive particles having an average particle size less than about 6 microns water.

17. The fine grit abrasive paper of claim 14 , further comprising an amorphous rubbery polymer film layer contacting said second surface which demonstrates antislip properties when either dry or wet, and further wherein the abrasive backing is curl-resistant upon exposure to liquid water.

Assignments (8)