| 摘要 |
The long-term stability of heavy-duty toothed belts for the transmission of force is usually substantially improved by the use of special fibers/filaments, such as aramide fibers, in the traction elements. The aim of the invention is to provide high-strength traction elements made of wound cord threads, optionally in combination with PBO fibers/filaments, for the use in tooth belts. Said cord threads consist of polyester-polyacrylate fibers or filaments that are produced by melt-spinning from liquid crystal polymers. The molecules within the fibers are aligned by extrusion of the spinning liquid through very fine nozzles, thereby resulting in an improved strength and fatigue resistance of the fibers. In addition to the aramide fibers as the main component, an additional damping fiber component is used in a smaller amount in the form of polyamide fibers/filaments that have a cord-thread structure. The cross contraction caused by traction thus acts evenly and without any force peaks onto the entire fiber composite so that the aramide traction element of the toothed belt is subject to lesser transverse stresses. |
