Abstract: A coated abrasive material comprising a textile backing--in the form of fabric, webbing, fleece and/or laminated material, base binder, abrasive particles and optionally size coat which is characterized in that the textile backing is extensible and that on the particle side an elastic intermediate layer is applied which lies between the textile backing and the usual base binder. This intermediate layer may contain caoutchouc latex and/or polyurethane and/or polymers, which contain butadiene and/or acrylic acid ester. The flexible and extensible coated abrasive may be used for profile grinding, sanding or polishing.

Abstract: An abrasive compound in which individual abrasive grains of various types are joined in a preliminary step into the formation of so-called agglomerated abrasive grains, each of which may contain a number of individual grains. The particular feature of the invention is that the abrasive compound which is to be applied to a suitable surface to constitute an abrasive or grinding tool consists of a mixture of agglomerated abrasive grains of substantially different types. The differences in the agglomerated abrasive grain refer principally to the abrasive power and strength and the ability to sustain abrading forces, i.e., they are related to the endurance of the agglomerated grains under conditions of use. The substantially different strengths or properties of the agglomerated abrasive grains may derive from different types of binder used to create them from the individual grains, different methods of hardening or drying, different quantities of binder, or different constituent individual grains.

Abstract: Abrasive grains are bound to a flexible support by a pattern of resin applied by means of a curved stencil having a wall thickness of 0.08 to 1 mm and having holes with a diameter of 0.05 to 3 mm, the total hole area amounting to 5 to 50% of the area of the stencil. A top binding agent is applied before or after the drying or hardening of the resin.