By means of the grinding body to be suitable;

摘要

PICT:0971580/C4-C5/1 An abrasive sheet comprises a backing sheet of polyethyleneterephthalate, polypropylene or polyethylene, one side of which has abrasive grains anchored thereto by a coating of flexible polyurethane adhesive which itself is coated with an epoxy novolac resin having at least three reactive epoxy groups. The abrasive may be silicon carbide, aluminium oxide, garnet, flint, emery or pumice. The other side of backing sheet may have a coating of an adhesive e.g. a polyester ink, and a mild abrasive e.g. walnut shell flour, diatomaceous earth or ink pigments (see Fig. 2).