Sheet stock that is useful as a separator in batteries can be obtained by a method in which (a) the sheet stock is provided, (b) the sheet stock is cut to the required width, and, subsequently, (c) the sheet stock obtained according to step (b) is wound onto a core or tube, and, subsequently, (d) the sheet stock is cut to length on the core or tube along the axis of the core or of the tube. The sheet stock has a carrier and abrasive particles, the abrasive particles being located inside and/or on at least part of the surface of the carrier.