Abrasive flap disc

Abrasive flap disc, containing a carrying disc (A) in a form of a round wheel with a hub (1) which is set off in the central zone and has a coaxial hole (2) reinforced with a steel flange sleeve (3) for mounting an abrasive unit on a grinder spindle, and where lower edges of numerous abrasive flaps (B) are fixed in regular angular spacings with glue binders (5) to the carrying disc (A) on a frontal ring surface of the near-edge zone (4) more distant from the hub (1), the abrasive flaps subsequently overlapping one another in the circumferential direction so that their rear edges are exposed, whereby the wheel of the carrying disc (A) is a layered polymer composite with structural reinforcement consisting of at least two meshes of glass fibre (7p,7) which are situated on both frontal surfaces of the carrying disc (A) and which are bonded by a composite matrix (6) containing a binder of a thermosetting synthetic resin and a fine-grained material, all the components of the layered composite being interconnected in the thermal-pressure process, characterised in that the fine-grained material of the composite matrix (6) is an inorganic, mineral or synthetic loose material, particularly quartz, calcareous or carbonaceous sands or polymineral sand, industrial or quarry dusts, blast furnace or copper slag, or a mixture of the aforementioned materials, whereby their natural or crumbled grain size values range from 0.06 to 2.0 mm and the hardness according to the Mohs scale ranges from 3 to 7.