Abstract: A sawing yarn comprises an abrasive mixture which contains a bonding resin and an abrasive material, as well as a multifilament core made of fibers which are resistant to breaking. The fibers are arranged substantially parallel to one another and are enveloped by the abrasive mixture. The bonding resin contains no polytetrafluoroethylene, and the quantity of abrasive material in the mixture gradually decreases from the surface of the abrasive yarn inward. The yarn is suitable for cutting hard and brittle materials such as single-crystal silicon.

Abstract: The invention relates to a method for producing compressed plastic-coated fibres or fibre strands, consisting of essentially parallel filaments, from fibre strands consisting of filaments coated with plastic. The invention is characterised in that fibre strands or a composite of a plurality of such fibre strands consisting of essentially parallel filaments to which the plastic is applied in a melted or liquid state, optionally as powder, are guided, following the coating, by means of a rotating device (6) which is used to carry out a local rotation of the fibres. The invention also relates to the use of the inventive individual filaments for producing saw threads, tapes and prepegs, fibre-reinforced plastic granulated material and fibre-reinforced preforms, or fibre-reinforced pultruded or extruded profiled elements. The invention further relates to a device for carrying out the inventive method.

Abstract: The present invention relates to a novel grinding tool, comprising a substrate with a first water-permeable, flexible textile layer, which comprises multifilaments and to which the abrasive material has been applied, and at least one second layer, which is connected to the surface of the first layer that is free from abrasive material, can absorb water and can be compressed, the abrasive material made up of binder and abrasive grain, selected from the group comprising diamond and cubic boron nitride, being applied to the first layer in such an amount that the grinding tool has a service life of at least two minutes, preferably at least 10 and with particular preference at least 20 minutes, when working a ceramic coating surface by wet grinding.

Abstract: A sawing yarn comprises an abrasive mixture which contains a bonding resin and an abrasive material, as well as a multifilament core made of fibers which are resistant to breaking. The fibers are arranged substantially parallel to one another and are enveloped by the abrasive mixture. The bonding resin contains no polytetrafluoroethylene, and the quantity of abrasive material in the mixture gradually decreases from the surface of the abrasive yarn inward. The yarn is suitable for cutting hard and brittle materials such as single-crystal silicon.