use of a textured polyester filament yarn in a substrate for the manufacture of abrasives is disclosed . the substrate permits the manufacture of abrasives having a uniform and clean surface and a long running time . coated abrasives incorporating the invention will not rapidly lose their binding agent grain layer during grinding and possess a high level of adhesion between substrate and adhesive . the particular yarn disclosed exhibits good absorbency for a binding agent for all , including fine , grains of abrasives .