Abrasive system for polystyrene applications

Abstract

The invention relates to an abrasive system for polystyrene applications. The invention relates to a kit of parts suitable for abrasion of a working surface with a power tool. The invention relates to a kit of parts suitable for abrasion of working surfaces of polymer materials, such as extruded polystyrene (XPS) insulation panels. The kit of parts comprises a backing pad arrangement and an abrading article.

1 . A kit of parts for abrasion of a working surface with a power tool, the kit comprising an abrading article and a backing pad arrangement comprising at least a backing pad, wherein
 each of the backing pad arrangement and the abrading article individually comprise a surface having a diameter, and the surface diameter of the backing pad arrangement is larger than the surface diameter of the abrading article;   each of the backing pad arrangement and the abrading article individually comprise multiple peripheral openings, which peripheral openings on the backing pad arrangement and peripheral openings on the abrading article enable transport of debris from the working surface with air flow through the abrading article and the backing pad arrangement, wherein the air flow may be generated by suction connected to the backing pad arrangement;   each peripheral opening on the abrading article is geometrically similar to a respective peripheral opening on the backing pad arrangement;   each peripheral opening spans an area that has a diameter, and the diameter of each peripheral opening on the abrading article is larger than or equal to the diameter of a respective peripheral opening on the backing pad arrangement;   the abrading article is configured to be concentrically aligned on the backing pad arrangement,   each peripheral opening on the abrading article is configured to be concentrically aligned with a respective peripheral opening on the backing pad arrangement, enabling transport of debris with air flow through the peripheral openings; and   the abrading article comprises a dense backing material that resists air flow through the material,   
       wherein when the backing pad arrangement and the abrading article are attached together for abrasion with a power tool, the perimeter of the backing pad arrangement and the perimeter of the peripheral openings on the backing pad arrangement are visible from beneath the abrading article, when viewed from the direction of the working surface. 
     
     
         2 . The kit according to  claim 1 , wherein the abrading article comprises a front side that comprises an abrasive surface, the abrasive surface comprising an abrasive layer, the abrasive layer comprising abrasive grains fixed onto the abrasive layer, and a back side that is configured to be releasably attached on the backing pad arrangement, for example by means of a hook and loop type attachment system, a screw or multiple screws. 
     
     
         3 . The kit according to  claim 1 , wherein the backing pad arrangement further comprises an intermediate pad, wherein
 the backing pad and the intermediate pad comprise peripheral openings,   each peripheral opening on the intermediate pad is geometrically congruent with a respective peripheral opening on the backing pad, and   the intermediate pad is configured to be releasably attached on the backing pad such that and the peripheral openings on the backing pad and on the intermediate pad are concentrically aligned.   
     
     
         4 . The kit according to  claim 1 , wherein the surface diameter of the backing pad arrangement and the surface diameter of the abrading article is at least 170 mm. 
     
     
         5 . The kit according to  claim 1 , wherein the diameter of the peripheral openings on the backing pad arrangement and the diameter of the peripheral openings on the abrading article is at least 20 mm. 
     
     
         6 . The kit according to  claim 1 , wherein the surface diameter of the backing pad arrangement is larger than the surface diameter of the abrading article by at least 1 mm, and/or wherein the diameter of each peripheral opening on the abrading article is larger than the diameter of a respective peripheral opening on the backing pad arrangement by at least 1 mm. 
     
     
         7 . The kit according to  claim 1 , wherein each of the backing pad arrangement and the abrading article individually comprises 5-10 peripheral openings, and wherein the peripheral openings are radially equidistantly and symmetrically arranged around the center of each of the backing pad arrangement and the abrading article, enabling efficient air flow at the working surface towards the peripheral openings. 
     
     
         8 . The kit according to  claim 2 , wherein the abrading article comprises a radial zone of abrasive surface having a width of 10-30 mm for preventing debris leakage via the perimeter of the abrading article, the radial zone extending from the perimeter of the abrading article towards the center. 
     
     
         9 . The kit according to  claim 1 , wherein the backing material of the abrading article resists air flow through the backing material such that air flow is confined between the abrading article and the working surface, and directed parallel to the working surface, the air flow being directed towards the peripheral openings, the backing material having a porosity of at least 5 s, measured using the Gurley method. 
     
     
         10 . The kit according to  claim 1 , wherein the backing pad arrangement and the abrading article further comprise secondary outlet openings radially equidistantly and symmetrically arranged around the center of each of the backing pad arrangement and the abrading article, and wherein each secondary outlet opening spans an area that has a diameter, and the diameter of each secondary outlet opening on the abrading article is larger than or equal to the diameter of a respective secondary outlet opening on the backing pad arrangement, such that when the backing pad arrangement and the abrading article are attached together for abrasion with a power tool, the perimeter of the secondary outlet openings on the backing pad arrangement are visible from beneath the abrading article, when viewed from the direction of the working surface. 
     
     
         11 . The kit according to  claim 1 , wherein the backing pad arrangement or the abrading article, or both the backing pad arrangement and the abrading article further comprise a central opening configured to convey air to the working surface. 
     
     
         12 . The kit according to  claim 11 , wherein both the backing pad arrangement and the abrading article comprise the central opening, and the central opening on the backing pad arrangement and the central opening on the abrading article each individually span an area that has a diameter, and the diameter of the central opening on the abrading article is larger than or equal to the diameter of the central opening on the backing pad arrangement. 
     
     
         13 . The kit according to  claim 11 , wherein the diameter of the central opening is in a range of 30-50 mm. 
     
     
         14 . The kit according to  claim 1 , wherein the backing pad arrangement and the abrading article are configured to be attached to an oscillating or reciprocating abrading apparatus. 
     
     
         15 . The kit according to  claim 1 , wherein the diameter of the backing pad arrangement, the diameter of the abrading article, the diameter of the peripheral openings, the diameter of the central openings, or the diameter of the secondary outlet openings refers to the longest possible distance between two points at the perimeter of the backing pad arrangement, abrading article, peripheral openings, central openings, or secondary outlet openings, respectively.