Abrasive article and method of making

Abstract

An abrasive sheet material comprising a first sheet having a first major suface and a second major surface and second sheets having first major surfaces and second major surfaces wherein the second major surfaces of the second sheets are affixed to the first major surface of the first sheet and spaces exist between the second sheets wherein said spaces form pathways that interweave between the second sheets wherein the pathways communicate with each other and form a network of pathways. At least one aperture extends from at least the first major surface of the first sheet to the second major surface of the first sheet and communicates with at least one of the pathways. Abrasive particles are coated onto at least the first major surface of the second sheets forming an abrasive first major surface. When air moves through the pathways by a vacuum source said pathways channel air across and parallel to the work surface while the air is in contact with the work surface thereby providing a sweeping movement of air across the work surface carrying dust with the air for the purpose of vacuuming dust from the work surface.

1 . An abrasive sheet material comprising:
 (a) A first sheet having a first major surface and a second major surface and second sheets having first major surfaces and second major surfaces wherein the second major surfaces of the second sheets are affixed to the first major surface of the first sheet and:   (b) spaces exist between the second sheets wherein said spaces form pathways that interweave between the second sheets wherein the pathways communicate with each other and form a network of pathways and:   (c) at least one aperture extends from at least the first major surface of the first sheet to at least the second major surface of the first sheet and communicates with at least one of the pathways.   (d) Abrasive particles are coated onto at least the first major surface of the second sheets forming an abrasive first major surface;   When the abrasive sheet is operatively connected to a suction device during sanding operations, air moves through the pathways, the air in contact with the work surface sweeps across the work surface carrying dust with the air and extracted from the work surface by the suction device.   
   
   
       2 . The abrasive sheet material of  claim 1  wherein the abrasive sheet material is in the form of a disc. 
   
   
       3 . The abrasive sheet material of  claim 1  wherein the second sheets are circular. 
   
   
       4 . The abrasive sheet material of  claim 1  wherein the second sheets are square. 
   
   
       5 . The abrasive sheet material of  claim 1  wherein the first sheet is made from a non resilient material. 
   
   
       6 . The abrasive sheet material of  claim 1  wherein the second sheets are made from a non resilient material. 
   
   
       7 . The abrasive sheet material of  claim 1  wherein the second sheets are adhesively affixed to the first sheet. 
   
   
       8 . A method of making an abrasive sheet material the method comprising:
 (a) providing a first sheet having a first major surface and a second major surface and second sheets having first major surfaces and second major surfaces, affixing the second major surfaces of the second sheets are to the first major surface of the first sheet and:   (b) providing spaces between the second sheets wherein said spaces form pathways that interweave between the second sheets wherein the pathways communicate with each other and form a network of pathways and:   (c) providing at least one aperture that extends from at least the first major surface of the first sheet to at least the second major surface of the first sheet and communicates with at least one of the pathways.   (d) providing abrasive particles and coating the abrasive particles onto at least the first major surface of the second sheets, forming an abrasive first major surface;   When the abrasive sheet is operatively connected to a suction device during sanding operations, air moves through the pathways, the air in contact with the work surface sweeps across the work surface carrying dust with the air and extracted from the work surface by the suction device.   
   
   
       9 . An abrasive sheet material comprising:
 (e) A first sheet having a first major surface and apposite second major surface and second sheets having first major surfaces and opposite second major surfaces wherein the second major surfaces of the second sheets are affixed to the first major surface of the first sheet and:   (f) spaces exist between the second sheets wherein said spaces form pathways that interweave between the second sheets wherein the pathways communicate with each other and form a network of pathways and:   (g) at least one aperture extends from at least the first major surface of the first sheet to at least the second major surface of the first sheet and communicates with at least one of the pathways.   (h) Abrasive particles are coated onto at least the second major surface of the first sheet forming an abrasive major surface;   When the abrasive sheet is attached to a back up pad of a tool and operatively connected to a suction device, air moves through the pathways, wherein the pathways are opposite the abrasive surface, the pathways form a conduit between the back up pad and the abrasive sheet and are in fluid communication with the at least one aperture thereby providing suction to the work surface via the at least one aperture.   
   
   
       10 . The abrasive sheet of  claim 8  wherein the abrasive sheet material is in the form of a disc 
   
   
       11 . The abrasive sheet material of  claim 8  wherein the first sheet is made from a non resilient material 
   
   
       12 . The abrasive sheet material of  claim 8  wherein the second sheet is made from a non resilient material.